CN101027847A - High frequency switch and method for manufacturing the same - Google Patents
High frequency switch and method for manufacturing the same Download PDFInfo
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- CN101027847A CN101027847A CN200580032361.3A CN200580032361A CN101027847A CN 101027847 A CN101027847 A CN 101027847A CN 200580032361 A CN200580032361 A CN 200580032361A CN 101027847 A CN101027847 A CN 101027847A
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Abstract
A high frequency switch (11) is configured by connecting a first diode (D1) which is a switching element, a second diode (D2), inductors (SL1, SL2), capacitors (C5, C6) and a resistance (R). A diode having a relatively small charge storage quantity in the ON status is used for the first diode, and a diode having a relatively large charge storage quantity in the ON status is used for the second diode. Namely, the diodes having different part numbers are used for the first diode and the second diode, respectively, and the diode of a part number having a relatively small charge storage quantity is used for the first diode, and the diode of a part number having a relatively large charge storage quantity is used for the second diode. Alternatively, the charge storage quantities of diodes of the same lot in the ON status are measured and classified, a diode having a relatively small charge storage quantity is used for the first diode and a diode having a relatively large charge storage quantity is be used for the second diode.
Description
Technical field
The present invention relates to a kind of HF switch and manufacture method thereof.The invention particularly relates to a kind of HF switch and manufacture method thereof that can be applicable to a plurality of different mobile communication system.
Background technology
For example, patent documentation 1 has been put down in writing a kind of HF switch that comprises first diode and second diode.First diode is electrically connected in series in the signal path between antenna terminal and the transmitter side input terminal.Second diode is electrically connected along separate routes with signal path between antenna terminal and the receiver side lead-out terminal.HF switch is optionally switched between the signal path between the signal path between antenna terminal and transmitter side input terminal and antenna terminal and receiver side lead-out terminal.Use identical first diode and second diode of specification.Generally at random from making HF switch with selection first diode criticizing and second diode.It should be noted that the diode that belongs to criticizing also has the difference of charge capacity approximately ± 10%.
In HF switch,, need short " switching time from the sending mode to the receiving mode " in order to prevent that high power from sending signal and flowing into the receiver side signal path.For this reason, should be with the property settings of first diode and second diode for being mutually suitable relation.
Yet, as described in the correlation technique, first diode and second diode from batch at random select, and do not consider that property settings with first diode and second diode is for being mutually suitable relation.This causes when producing HF switch, and " switching time from the sending mode to the receiving mode " becomes very long, therefore, may obtain high power and send the HF switch that signal flow into the receiver side signal path.
Patent documentation 1: Japanese Unexamined Patent Application spy opens the 2000-223901 communique.
Disclosure of the Invention
The problem to be solved in the present invention
An object of the present invention is to provide a kind of switching time from the sending mode to the receiving mode of very short HF switch and a kind of method of making this HF switch is provided.
The means of dealing with problems
In order to realize above purpose, a kind of HF switch according to the present invention comprises a switch.This switch comprises first diode and second diode.First diode is electrically connected in series in the signal path between antenna terminal and transmitter side input terminal.Second diode is electrically connected along separate routes with signal path between antenna terminal and receiver side lead-out terminal.This switch optionally switches between the signal path between the signal path between antenna terminal and transmitter side input terminal and antenna terminal and receiver side lead-out terminal.This HF switch has such feature, the diode that promptly has less charge capacity is used as first diode, and the diode that has than the large charge capacity is used as second diode, thereby the charge capacity that makes the diode of winning is always less than the charge capacity of second diode.
For example, has the charge capacity of diode of less charge capacity outside-10% the scope that has than the specification of the charge capacity of the diode of large charge capacity.In addition, has the Part No. that is different from diode than the Part No. of the diode of large charge capacity with less charge capacity.
According to above-mentioned HF switch, when sending mode was switched to receiving mode, first diode and second diode all discharged wherein charge stored.Then, owing to be stored in the quantity of electric charge in first diode, at first discharge and finish so be stored in electric charge in first diode less than the quantity of electric charge that is stored in second diode.Correspondingly, first diode enters " shutoff " state in the short time.Therefore, shorten the switching time from the sending mode to the receiving mode.
In addition, a kind of HF switch according to the present invention comprises antenna multicoupler, first switch and second switch.This antenna multicoupler is electrically connected to level behind the antenna terminal with the signal path that signal path branched into first communication system and the signal path of second communication system.First switch is set in the signal path of first communication system.First switch comprises first diode and second diode.First diode is electrically connected in series in the signal path between the antenna terminal and the first transmitter side input terminal.Second diode is electrically connected along separate routes with signal path between the antenna terminal and the first receiver side lead-out terminal.First switch optionally switches between the signal path between the signal path between the antenna terminal and the first transmitter side input terminal and the antenna terminal and the first receiver side lead-out terminal.Second switch is set in the signal path of second communication system.Second switch comprises the 3rd diode and the 4th diode.The 3rd diode is electrically connected in series in the signal path between the antenna terminal and the second transmitter side input terminal.The 4th diode is electrically connected along separate routes with signal path between the antenna terminal and the second receiver side lead-out terminal.Second switch optionally switches between the signal path between the signal path between the antenna terminal and the second transmitter side input terminal and the antenna terminal and the second receiver side lead-out terminal.This HF switch has such feature, the diode that promptly has less charge capacity is used as first diode and the 3rd diode, and the diode that has than the large charge capacity is used as second diode and the 4th diode, thereby the charge capacity that makes win diode and the 3rd diode is always respectively less than the charge capacity of second diode and the 4th diode.
According to said structure, obtained to accept the double frequency-band HF switch of the signal processing of two communication systems.
In addition, HF switch according to the present invention comprises antenna multicoupler, first switch, second switch and duplexer.Antenna multicoupler is electrically connected to level behind the antenna terminal with the signal path that signal path branched into first communication system and the signal path of second communication system and third communication system.First switch is set in the signal path of first communication system.First switch comprises first diode and second diode.First diode is electrically connected in series in the signal path between the antenna terminal and the first transmitter side input terminal.Second diode is electrically connected along separate routes with signal path between the antenna terminal and the first receiver side lead-out terminal.First switch optionally switches between the signal path between the signal path between the antenna terminal and the first transmitter side input terminal and the antenna terminal and the first receiver side lead-out terminal.Second switch is set in the signal path of second communication system and third communication system.Second switch comprises the 3rd diode and the 4th diode.The 3rd diode is electrically connected in series in antenna terminal and by in the signal path between the shared second transmitter side input terminal of second communication system and third communication system.The 4th diode is electrically connected along separate routes with signal path between antenna terminal and second and third receiver side lead-out terminal.Second switch optionally switches between the signal path between the signal path between the antenna terminal and the second transmitter side input terminal and antenna terminal and second and third receiver side lead-out terminal.Duplexer is set in the signal path of second communication system and third communication system signal path is branched into signal path between the second switch and the second receiver side lead-out terminal and the signal path between second switch and the 3rd receiver side lead-out terminal.This HF switch has such feature, the diode that promptly has less charge capacity is used as first diode and the 3rd diode, and the diode that has than the large charge capacity is used as second diode and the 4th diode, thereby the charge capacity that makes win diode and the 3rd diode is always respectively less than the charge capacity of second diode and the 4th diode.
According to aforesaid way, three frequency band HF switch of the signal processing of three communication systems have been obtained to accept.
The present invention also provides a kind of manufacturing to comprise the method for the HF switch of a switch.This switch comprises first diode and second diode.First diode is electrically connected in series in the signal path between antenna terminal and transmitter side input terminal.Second diode is electrically connected along separate routes with signal path between antenna terminal and receiver side lead-out terminal.This switch optionally switches between the signal path between the signal path between antenna terminal and transmitter side input terminal and antenna terminal and receiver side lead-out terminal.This method comprises: the charge capacity according to diode will belong to the diode classification of criticizing; The diode that will have less charge capacity is as first diode; And the diode that will have than the large charge capacity is used as second diode.
According to the HF switch that obtains by said method, when sending mode was switched to receiving mode, first diode and second diode all discharged wherein charge stored.Then, owing to be stored in the quantity of electric charge in first diode, at first discharge and finish so be stored in electric charge in first diode less than the quantity of electric charge that is stored in second diode.Correspondingly, first diode enters " shutoff " state in the short time.Therefore, shorten the switching time from the sending mode to the receiving mode.
The present invention also provides a kind of manufacturing to comprise the method for the HF switch of antenna multicoupler, first switch and second switch.This antenna multicoupler is electrically connected to level behind the antenna terminal with the signal path that signal path branched into first communication system and the signal path of second communication system.First switch is set in the signal path of first communication system.First switch comprises first diode and second diode.First diode is electrically connected in series in the signal path between the antenna terminal and the first transmitter side input terminal.Second diode is electrically connected along separate routes with signal path between the antenna terminal and the first receiver side lead-out terminal.First switch optionally switches between the signal path between the signal path between the antenna terminal and the first transmitter side input terminal and the antenna terminal and the first receiver side lead-out terminal.Second switch is set in the signal path of second communication system.Second switch comprises the 3rd diode and the 4th diode.The 3rd diode is electrically connected in series in the signal path between the antenna terminal and the second transmitter side input terminal.The 4th diode is electrically connected along separate routes with signal path between the antenna terminal and the second receiver side lead-out terminal.Second switch optionally switches between the signal path between the signal path between the antenna terminal and the second transmitter side input terminal and the antenna terminal and the second receiver side lead-out terminal.This method comprises: the charge capacity according to diode will belong to the diode classification of criticizing; The diode that will have less charge capacity is as first diode and the 3rd diode; And the diode that will have than the large charge capacity is used as second diode and the 4th diode.
According to said method, obtained to accept the double frequency-band HF switch of the signal processing of two communication systems.
The present invention also provides a kind of manufacturing to comprise the HF switch of antenna multicoupler, first switch, second switch and duplexer.Antenna multicoupler is electrically connected to level behind the antenna terminal with the signal path that signal path branched into first communication system and the signal path of second communication system and third communication system.First switch is set in the signal path of first communication system.First switch comprises first diode and second diode.First diode is electrically connected in series in the signal path between the antenna terminal and the first transmitter side input terminal.Second diode is electrically connected along separate routes with signal path between the antenna terminal and the first receiver side lead-out terminal.First switch optionally switches between the signal path between the signal path between the antenna terminal and the first transmitter side input terminal and the antenna terminal and the first receiver side lead-out terminal.Second switch is set in the signal path of second communication system and third communication system.Second switch comprises the 3rd diode and the 4th diode.The 3rd diode is electrically connected in series in antenna terminal and by in the signal path between the shared second transmitter side input terminal of second communication system and third communication system.The 4th diode is electrically connected along separate routes with signal path between antenna terminal and second and third receiver side lead-out terminal.Second switch optionally switches between the signal path between the signal path between the antenna terminal and the second transmitter side input terminal and antenna terminal and second and third receiver side lead-out terminal.Duplexer is set in the signal path of second communication system and third communication system signal path is branched into signal path between the second switch and the second receiver side lead-out terminal and the signal path between second switch and the 3rd receiver side lead-out terminal.This method comprises: the charge capacity according to diode will belong to the diode classification of criticizing; The diode that will have less charge capacity is as first diode and the 3rd diode; And the diode that will have than the large charge capacity is used as second diode and the 4th diode.
According to said method, three frequency band HF switch of the signal processing of three communication systems have been obtained to accept.
The effect of invention
According to the present invention, the diode with less charge capacity is used as first diode that is electrically connected in series in the transmitter side signal path, and the diode that has than the large charge capacity is used as second diode that is electrically connected along separate routes with the receiver side signal path.By this, in HF switch, when sending mode is switched to receiving mode, owing to be stored in the quantity of electric charge in first diode, at first discharge and finish so be stored in the quantity of electric charge in first diode less than the quantity of electric charge that is stored in second diode.Correspondingly, first diode enters " shutoff " state in the short time.Therefore, shorten the switching time from the sending mode to the receiving mode.Therefore, when making HF switch, always can obtain to prevent that high power from sending the HF switch that signal flows into the receiver side signal path.
The accompanying drawing summary
Fig. 1 shows the equivalent circuit diagram according to first embodiment of HF switch of the present invention;
Fig. 2 shows the equivalent circuit diagram according to second embodiment of HF switch of the present invention;
Fig. 3 shows the equivalent circuit diagram according to the 3rd embodiment of HF switch of the present invention.
Realize the optimal mode of invention
Referring now to accompanying drawing HF switch according to the present invention and the embodiment that makes the method for this HF switch are described.
(first embodiment is with reference to figure 1)
Single band HF switch according to first embodiment comprises: HF switch 11; LC filter 12; And capacitor C, C2 and C3, shown in the equivalent circuit diagram of Fig. 1.
In order always to obtain very short HF switch switching time from the sending mode to the receiving mode, be with the property settings of the first diode D1 and the second diode D2 for being mutually suitable relation.In other words, the diode that has less charge capacity under " conducting " state is used as the first diode D1, and the diode that has under " conducting " state than the large charge capacity is used as the second diode D2.Especially, the diode with different Part No.s is used separately as the first diode D1 and the second diode D2.In addition, the diode with Part No. of less charge capacity is used as the first diode D1, and the diode that has than the Part No. of large charge capacity is used as the second diode D2.In addition, have less charge capacity Part No. diode charge capacity preferably have than the charge capacity specification of the diode of the Part No. of large charge capacity ± 10% scope outside.This be because belong to batch diode also can have about ± 10% charge capacity difference.
Perhaps, to achieve these goals, handle that make can be with the property settings of the first diode D1 and the second diode D2 for being mutually suitable relation thereby can carry out following classification in advance.That is, belong under " conducting " state (voltage that promptly is applied to diode is approximately equal to or the state during greater than 0.4V) with batch the charge capacity of diode can be classified then by measuring such as measuring equipments such as electric impedance analyzers.Then, the diode with less charge capacity can be used as the first diode D1, and the diode that has than the large charge capacity can be used as the second diode D2.
To the work according to the HF switch of said structure be described now.When sending signal and be sent out (sending mode), apply the voltage of 2.5V for example so that the first diode D1 and the second diode D2 enter " conducting " state to control voltage terminal Vc.This allows to pass through LC filter 12 and HF switch 11 from the transmission signal of transmitter side input terminal Tx input, and this transmission signal is launched from antenna terminal ANT then.On the other hand, inductor SL2 has the strip line with respect to frequency lambda/4 line lengths that send signal, so impedance becomes infinity, and signal can not pass through between antenna terminal ANT and reception terminal Rx.In addition, 12 decay of LC filter send the harmonic wave of signal.
On the contrary, when received signal is received (receiving mode), apply the voltage of 0V for example so that the first diode D1 and the second diode D2 enter " shutoff " state to control voltage terminal Vc.The electric capacity of the first diode D1 under this permission " shutoff " state and inductor SL1 form bypass filter.This makes the high impedance in the frequency acceptance band can prevent that received signal from flowing into transmitter side input terminal Tx, and the received signal from antenna terminal ANT input is output to receiver side lead-out terminal Rx simultaneously.
To the handover operation from the sending mode to the receiving mode be elaborated now.In sending mode, the first diode D1 and the second diode D2 are in " conducting " state.Electric charge in being stored in the first diode D1 is Q1 and be stored in electric charge among the second diode D2 when being Q2, because the charge capacity of the first diode D1 is less than the charge capacity of the second diode D2, so set up Q1 less than the relation of Q2 (Q1＜Q2).Under this state, Vc applies 0V voltage to switch to receiving mode from sending mode to the control voltage terminal, and the first diode D1 and the second diode D2 discharge stored charge.Because the first diode D1 stored charge Q1 is less than the second diode D2 stored charge Q2, so first diode D1 discharge off at first.Correspondingly, the first diode D1 enters " shutoff " state in the short time.Therefore, always can obtain very short HF switch switching time from the sending mode to the receiving mode.
Table 1 shows the measurement result of the switching time that HF switch switches from the sending mode to the receiving mode.HF switch is manufactured with the various combinations of the first diode D1 and the second diode D2 of different electric capacity.It should be noted that in table 1, use capacitor C 1 and C2 to replace charge capacity Q1 and Q2 respectively.Yet when the voltage V that applies was constant, (C1＜C2) also can set up Q1 less than the relation of Q2 (Q1＜Q2) according to equation Q=CV if C1 is less than C2.Each capacitor C 1 in the table 1, C2 obtain when diode being applied the voltage of 0.8V.
Table 1
Attention:
*Represent that it is outside scope of the present invention.
Table 1 proof is used as the first diode D1 that is electrically connected in series in the transmitter side signal path by the diode that will have smaller capacitive (less charge capacity), and the diode that will have big electric capacity (than the large charge capacity) is used as the second diode D2 that is electrically connected along separate routes with the receiver side signal path, can make HF switch have the very short switching time from the sending mode to the receiving mode.
It should be noted that in first embodiment HF switch 11 and LC filter 12 are manufactured the laminate that constitutes by a plurality of dielectric layers of lamination integratedly.
(second embodiment is with reference to Fig. 2)
Double frequency-band HF switch (front-end module) is provided with two different communication systems that comprise gsm system and DCS system.HF switch shown in the equivalent electric circuit of Fig. 2 comprises antenna multicoupler 20 and the capacitor C that is connected electrically in level behind the antenna terminal ANT.Antenna multicoupler 20 branches out the signal path of gsm system and the signal path of DCS system.Gsm system comprises the first HF switch 11G, a LC filter 12G and capacitor C1g, C2g.Similarly, the DCS system comprises the second HF switch 11D, the 2nd LC filter 12D and capacitor C1d, C2d.
The first HF switch 11G optionally switches between the signal path between the signal path between the antenna terminal ANT and the first transmitter side input terminal Txg and the antenna terminal ANT and the first receiver side lead-out terminal Rxg.The one LC filter 12G is located between the first HF switch 11G and the first transmitter side input terminal Txg.
The second HF switch 11D optionally switches between the signal path between the signal path between the antenna terminal ANT and the second transmitter side input terminal Txd and the antenna terminal ANT and the second receiver side lead-out terminal Rxd.The 2nd LC filter 12D is located between the second HF switch 11D and the second transmitter side input terminal Txd.
The first HF switch 11G is manufactured into and makes such as switch elements such as diode GD1, GD2, inductor GSL1, GSL2, and capacitor GC5, GC6, and resistor R G is electrically connected.The first diode GD1 is so that the positive pole of the first diode GD1 places the mode of antenna terminal ANT one side to be electrically connected in series in gsm system signal path between the antenna terminal ANT and the first transmitter side input terminal Txg.In addition, inductor GSL1 is connected electrically between the negative pole and ground of the first diode GD1.The second diode GD2 is electrically connected along separate routes with gsm system signal path between the antenna terminal ANT and the first receiver side lead-out terminal Rxg, and the positive pole of the second diode GD2 is by capacitor GC5 ground connection.Control voltage terminal Vc is electrically connected to contact between the second diode GD2 and capacitor GC5 by resistor R G.In addition, inductor GSL2 is electrically connected in series in from the signal path of antenna terminal ANT one side of the negative pole of the second diode GD2, and capacitor GC6 is connected electrically between the negative pole and ground of the second diode GD2.
The second HF switch 11D is manufactured into and makes such as switch elements such as diode DD1, DD2, inductor DSL1, DSL2, DSLt, and capacitor DC5, DCt1, and resistor R D is electrically connected.The 3rd diode DD1 is so that make the positive pole of three diode DD1 place the mode of antenna terminal ANT one side to be electrically connected in series in DCS system signal path between the antenna terminal ANT and the second transmitter side input terminal Txd.In addition, inductor DSL1 is connected electrically between the negative pole and ground of the 3rd diode DD1.The series circuit of capacitor DCt1 and inductor DSLt is electrically connected in parallel with the 3rd diode DD1.The 4th diode DD2 is electrically connected along separate routes with DCS system signal path between the antenna terminal ANT and the second receiver side lead-out terminal Rxd, and the positive pole of the 4th diode DD2 is by capacitor DC5 ground connection.Control voltage terminal Vc2 is electrically connected to contact between the 4th diode DD2 and capacitor DC5 by resistor R D.In addition, inductor DSL2 is electrically connected in series in from the signal path of antenna terminal ANT one side of the negative pole of the 4th diode DD2.
In order always to obtain very short HF switch switching time from the sending mode to the receiving mode, with the property settings of the characteristic of the first and the 3rd diode GD1, DD1 and the second and the 4th diode GD2, DD2 for being mutually suitable relation.In other words, the diode with less charge capacity is used as the first and the 3rd diode GD1, DD1, and the diode that has than the large charge capacity is used as the second and the 4th diode GD2, DD2.More specifically, the diode with different Part No.s is used as the first and the 3rd diode GD1, DD1 and the second and the 4th diode GD2, DD2 respectively.Then, the diode with Part No. of less charge capacity is used as the first and the 3rd diode GD1, DD1, and the diode that has than the Part No. of large charge capacity is used as the second and the 4th diode GD2, DD2.Preferably, have less charge capacity diode charge capacity have than the charge capacity specification of the diode of large charge capacity ± 10% scope outside.
Perhaps,, can carry out following classification in advance and handle in order to realize aforementioned purpose, and can be with the property settings of the characteristic of the first and the 3rd diode GD1, DD1 and the second and the 4th diode GD2, DD2 for being mutually suitable relation.That is, belong under " conducting " state (voltage that promptly is applied to diode is approximately equal to or the state during greater than 0.4V) with batch the charge capacity of diode can be classified then by measuring such as measuring equipments such as electric impedance analyzers.Thus, the diode with less charge capacity can be used as the first and the 3rd diode GD1, DD1, and the diode that has than the large charge capacity can be used as the second and the 4th diode GD2, DD2.
The one LC filter 12G is the low pass filter that comprises inductor GLt1 and capacitor.The one LC filter 12G is located between the first HF switch 11G and the first transmitter side input terminal Txg.The capacitor of low pass filter comprises the capacitor GCc1 that is electrically connected in parallel with inductor GLt1 and two ground capacitors (by-pass capacitor) GCu1, the GCu2 of ground connection.
The 2nd LC filter 12D is to be located between the second HF switch 11D and the second transmitter side input terminal Txd and to make the parallel circuits of inductor DLt1 and capacitor DCc1 in series be electrically connected mutually with the parallel circuits of inductor DLt2 and capacitor DCc2.The two ends of inductor DLt1 are respectively by capacitor DCu1, DCu2 ground connection.
To the work of the HF switch made as mentioned above be described now.When sending the transmission signal of DCS system (1.8MHz frequency band), in the second HF switch 11D, for example the voltage of 2.5V is applied to control voltage terminal Vc2 so that the 3rd diode DD1 and the 4th diode DD2 enter " conducting " state.Thus, send signal from the DCS system that the second transmitter side input terminal Txd enters, by the 2nd LC filter 12D, the second HF switch 11D and antenna multicoupler 20, this transmission signal is launched from antenna terminal ANT then.
At this moment, in the first HF switch 11G of gsm system, for example the voltage of 0 V is applied to control voltage terminal Vc1 so that the first diode GD1 enters " shutoff " state.Thus, can stop the transmission signal of gsm system to be sent out.By connecting antenna multicoupler 20, can stop the transmission signal of DCS system to flow into the first transmitter side input terminal Txg and the first receiver side lead-out terminal Rxg in the gsm system.In addition, second harmonic and the triple-frequency harmonics in the 2nd LC filter 12D of the DCS system decay DCS system.
When sending the transmission signal of gsm system (900MHz frequency band), in the first HF switch 11G, for example the voltage of 2.5 V is applied to control voltage terminal Vc1 so that the first diode GD1 and the second diode GD2 enter " conducting " state.Thus, the transmission signal of gsm system is by a LC filter 12G, the first HF switch 11G and antenna multicoupler 20G, and this transmission signal is launched from antenna terminal ANT then.
At this moment, in the HF switch 11D of DCS system, for example the voltage of 0V is applied to control voltage terminal Vc2 so that the 3rd diode DD1 enters " shutoff " state.Thus, can stop the transmission signal of DCS system to be sent out.By connecting antenna multicoupler 20, can stop the transmission signal of gsm system to flow into the second transmitter side input terminal Txd and the second receiver side lead-out terminal Rxd in the DCS system.
In addition, the second harmonic in the gsm system is comprised the low pass filter decay of capacitor Ct1 contained in the antenna multicoupler 20, inductor Lt1 and by-pass capacitor Cu1.Triple-frequency harmonics in the gsm system is decayed by a LC filter 12G of gsm system.
When receiving the received signal of DCS system and gsm system, in the HF switch 11D of DCS system, for example the voltage of 0V is applied to control voltage terminal Vc2 so that the 3rd diode DD1 and the 4th diode DD2 enter " shutoff " state, in the HF switch 11G of gsm system, for example the voltage of 0V is applied to control voltage terminal Vc1 so that the first diode GD1 and the second diode GD2 enter " shutoff " state simultaneously.Thus, can stop the received signal of DCS system to flow into the second transmitter side input terminal Txd of DCS system, and can stop the first transmitter side input terminal Txg of the received signal inflow gsm system of gsm system.The signal that enters from antenna terminal ANT is output to the receiver side lead-out terminal Rxd of DCS system and the receiver side lead-out terminal Rxg of gsm system respectively.
By connecting antenna multicoupler 20, can stop the received signal of DCS system to flow into gsm system, and can stop the received signal of gsm system to flow into the DCS system.
To the handover operation from the sending mode to the receiving mode be described in detail now.In sending mode, the first diode GD1 and the second diode GD2 are in " conducting " state.At this moment, electric charge in being stored in the first diode GED1 is Q1 and is stored in electric charge among the second diode GD2 when being Q2, because the charge capacity of the first diode GD1 is less than the charge capacity of the second diode GD2, so set up Q1 less than the relation of Q2 (Q1＜Q2).Under this state, when the voltage that applies 0V to control voltage terminal Vc1 with when sending mode switches to receiving mode, the first diode GD1 and the second diode GD2 discharge stored charge.Owing to be stored in charge Q 1 among the first diode GD1, so first diode GD1 discharge off at first less than the charge Q 2 that is stored among the second diode GD2.Correspondingly, the first diode GD1 enters " shutoff " state in the short time.Therefore, always can obtain in the gsm system the very short HF switch switching time from the sending mode to the receiving mode.
Switching manipulation in the DCS system from the sending mode to the receiving mode is similar.That is, under sending mode, the 3rd diode DD1 and the 4th diode DD2 are in " conducting " state.At this moment, electric charge in being stored in the 3rd diode DD1 is Q1 and is stored in electric charge among the 4th diode DD2 when being Q2, because the charge capacity of the 3rd diode DD1 is less than the charge capacity of the 4th diode DD2, so set up Q1 less than less than the relation of Q2 (Q1＜Q2).Under this state, when applying 0V voltage to control voltage terminal Vc2 with when sending mode switches to receiving mode, the 3rd diode DD1 and the 4th diode DD2 discharge stored charge.Owing to be stored in charge Q 1 among the 3rd diode DD1, so the 3rd diode DD1 discharge off at first less than the charge Q 2 that is stored among the 4th diode DD2.Correspondingly, the 3rd diode DD1 enters " shutoff " state in the short time.Thus, always can obtain in the DCS system the very short HF switch switching time from the sending mode to the receiving mode.
(the 3rd embodiment is with reference to Fig. 3)
To the 3rd embodiment of three frequency band HF switch with three different communication systems such as comprising gsm system, pcs system and DCS system be described.
Gsm system comprises the first HF switch 11G, a LC filter 12G, and capacitor C1g, C2g, GCu3.The structure of gsm system with work with second embodiment in identical, so will no longer carry out the explanation of repetition.
The structure of antenna multicoupler 20 and work with second embodiment in basic identical, so will no longer carry out repeat specification.
Pcs system and DCS system comprise the second HF switch 11D ', the 2nd LC filter 12D, duplexer 14D, and capacitor C1d, C2d, C3d.The circuit formation of the second HF switch 11D ' and the 2nd LC filter 12D is identical with second embodiment's, so will no longer carry out repeat specification.
The back level that duplexer 14D is electrically connected to the second HF switch 11D ' is with the received signal path that signal path branched into pcs system and the received signal path of DCS system.
The second HF switch 11D ' optionally be positioned between the antenna terminal ANT and the second transmitter side input terminal Txd, by the shared transmission signal path of pcs system and DCS system, and lay respectively between pcs system received signal path between antenna terminal ANT and second and third receiver side lead-out terminal Rxd1, Rxd2 and the DCS system received signal path and switch.
The second HF switch 11D ' is manufactured into and makes such as switch elements such as diode DD1, DD2, inductor DPSL1, DSL2, DPSLt, and capacitor DC5, DC6, DPCt, and resistor DR1 is electrically connected.The 3rd diode DD1 so that the positive pole of the 3rd diode DD1 place the mode of antenna terminal ANT one side be electrically connected in series between the antenna terminal ANT and the second transmitter side input terminal Txd, by the shared transmission signal path of pcs system and DCS system.In addition, inductor DPSL1 is connected electrically between the negative pole and ground of the 3rd diode DD1.The series circuit of capacitor DPCt and inductor DPSLt is electrically connected in parallel with the 3rd diode DD1.Between the 4th diode DD2 and antenna terminal ANT and duplexer 14D, be electrically connected along separate routes by the shared received signal path of pcs system and DCS system, and the positive pole of the 4th diode DD2 is by capacitor DC5 ground connection.Control voltage terminal Vc3 is electrically connected to contact between the 4th diode DD2 and capacitor DC5 by resistor DR1.In addition, inductor DSL2 is electrically connected in series in from the signal path of antenna terminal ANT one side of the negative pole of the 4th diode DD2.
In order to obtain very short HF switch switching time from the sending mode to the receiving mode, with the property settings of the characteristic of the first and the 3rd diode GD1, DD1 and the second and the 4th diode GD2, DD2 for being mutually suitable relation.That is, the diode with less charge capacity is used as the first and the 3rd diode GD1, DD1, and the diode that has than the large charge capacity is used as the second and the 4th diode GD2, DD2.More specifically, the diode with different Part No.s is used as the first and the 3rd diode GD1, DD1 and the second and the 4th diode GD2, DD2 respectively.Therefore, the diode with Part No. of less charge capacity is used as the first and the 3rd diode GD1, DD1, and the diode that has than the Part No. of large charge capacity is used as the second and the 4th diode GD2, DD2.Preferably, have less charge capacity Part No. diode charge capacity have than the charge capacity specification of the diode of the Part No. of large charge capacity ± 10% scope outside.
Perhaps, to achieve these goals, can carry out following classification in advance and handle, and can be with the property settings of the characteristic of the first and the 3rd diode GD1, DD1 and the second and the 4th diode GD2, DD2 for being mutually suitable relation.Promptly, belong under " conducting " state (voltage that promptly is applied to diode is approximately equal to or the state during greater than 0.4V) with batch the charge capacity of diode can be by measuring such as measuring equipments such as electric impedance analyzers, be classified then, thereby make diode be used as the first and the 3rd diode GD1, DD1, and the diode that has than the large charge capacity is used as the second and the 4th diode GD2, DD2 with less charge capacity.
To the work of above-mentioned HF switch be described now.When sending the transmission signal of DCS system or pcs system, for example the voltage of 2.5V is applied to control voltage terminal Vc3, simultaneously for example the voltage of 0V is applied to control voltage terminal Vc1, Vc2, thereby makes diode DD1, DD2 enter " conducting " state and diode GD1, GD2, PD1, PD2 enter " shutoff " state.Thus, from the transmission signal of the DCS system (or pcs system) that the second transmitter side input terminal Txd enters by the 2nd LC filter 12D, the second HF switch 11D ', and antenna multicoupler 20, this transmission signal is launched from antenna terminal ANT then.
When sending the transmission signal of gsm system, for example the voltage of 2.5V is applied to control voltage terminal Vc1, simultaneously for example the voltage of 0V is applied to control voltage terminal Vc2, Vc3, thereby makes diode GD1, GD2 enter " conducting " state and diode DD1, DD2, PD1, PD2 enter " shutoff " state.Thus, the transmission signal of the gsm system that enters from the first transmitter side input terminal Txg is by a LC filter 12G, the first HF switch 11G, and antenna multicoupler 20, and this transmission signal is launched from antenna terminal ANT then.
When receiving the received signal of DCS system, for example the voltage of 0V is applied to all control voltage terminal Vc1, Vc2, Vc3, thereby makes diode GD1, GD2, DD1, DD2, PD1, PD2 enter " shutoff " state.Thus, be output to the receiver side lead-out terminal Rxd1 of DCS system from the signal of antenna terminal ANT input.
When receiving the received signal of pcs system, for example the voltage of 2.5V is applied to control voltage terminal Vc2, simultaneously for example the voltage of 0V is applied to control voltage terminal Vc1, Vc3, thereby makes diode PD1, PD2 enter " conducting " state and diode GD1, GD2, DD1, DD2 enter " shutoff " state.Thus, be output to the receiver side lead-out terminal Rxd2 of pcs system from the signal of antenna terminal ANT input.
When receiving the received signal of gsm system, for example the voltage of 0V is applied to all control voltage terminal Vc1, Vc2, Vc3, thereby makes diode GD1, GD2, DD1, DD2, PD1, PD2 enter " shutoff " state.Thus, be output to the receiver side lead-out terminal Rxg of gsm system from the signal of antenna terminal ANT input.
By connecting antenna multicoupler 20, can stop the received signal of DCS system and pcs system to flow into gsm system, can stop the received signal of gsm system to flow into DCS system and PDS system simultaneously.
When sending mode is switched to receiving mode in gsm system, DCS system and pcs system, because the charge capacity of diode GD1, DD1 is less than the charge capacity of diode GD2, DD2, diode GD1, DD1 enter " shutoff " state in the short time.Therefore, always can obtain in gsm system, DCS system and the pcs system the very short HF switch switching time from the sending mode to the receiving mode.
(alternative embodiment)
The method that it should be noted that HF switch and make this HF switch is not limited to the foregoing description, but can be modified as various alternative embodiments and can not deviate from scope of the present invention.
Industrial applicibility
As mentioned above, the present invention is for the HF switch and the manufacturing that can be applicable to multiple different mobile communication system The method of this HF switch is useful, aspect especially very short in the switching time from the sending mode to the receiving mode is Favourable.
Claims (8)
1. HF switch with the switch that comprises first diode and second diode, described first diode is electrically connected in series in the signal path between antenna terminal and transmitter side input terminal, described second diode is electrically connected along separate routes with signal path between described antenna terminal and receiver side lead-out terminal, wherein said switch optionally switches between the signal path between the signal path between described antenna terminal and described transmitter side input terminal and described antenna terminal and described receiver side lead-out terminal, in the described HF switch:
Diode with less charge capacity is used as described first diode, and the diode that has than the large charge capacity is used as described second diode, thereby makes the charge capacity of described first diode always less than the charge capacity of described second diode.
2. one kind has antenna multicoupler, the HF switch of first switch and second switch, wherein said antenna multicoupler is connected electrically in level behind the antenna terminal with the signal path that signal path branched into first communication system and the signal path of second communication system, described first switch is set in the signal path of described first communication system and comprises first diode and second diode, described first diode is electrically connected in series in the signal path between the described antenna terminal and the first transmitter side input terminal, described second diode is electrically connected along separate routes with signal path between the described antenna terminal and the first receiver side lead-out terminal, described first switch optionally switches between the signal path between the signal path between described antenna terminal and the described first transmitter side input terminal and described antenna terminal and the described first receiver side lead-out terminal, described second switch is set in the signal path of described second communication system and comprises the 3rd diode and the 4th diode, described the 3rd diode is electrically connected in series in the signal path between the described antenna terminal and the second transmitter side input terminal, described the 4th diode is electrically connected along separate routes with signal path between the described antenna terminal and the second receiver side lead-out terminal, described second switch optionally switches between the signal path between the signal path between described antenna terminal and the described second transmitter side input terminal and described antenna terminal and the described second receiver side lead-out terminal, in the described HF switch:
Diode with less charge capacity is used as described first diode and described the 3rd diode, and the diode that has than the large charge capacity is used as described second diode and described the 4th diode, thereby makes the charge capacity of described first diode and described the 3rd diode always respectively less than the charge capacity of described second diode and described the 4th diode.
3. one kind has antenna multicoupler, first switch, second switch, and the HF switch of duplexer, wherein said antenna multicoupler is connected electrically in level behind the antenna terminal with the signal path that signal path branched into first communication system and the signal path of second communication system and third communication system, described first switch is set in the signal path of described first communication system and comprises first diode and second diode, described first diode is electrically connected in series in the signal path between the described antenna terminal and the first transmitter side input terminal, described second diode is electrically connected along separate routes with signal path between the described antenna terminal and the first receiver side lead-out terminal, described first switch optionally switches between the signal path between the signal path between described antenna terminal and the described first transmitter side input terminal and described antenna terminal and the described first receiver side lead-out terminal, described second switch is set in the signal path of described second communication system and third communication system and comprises the 3rd diode and the 4th diode, described the 3rd diode is electrically connected in series in described antenna terminal and by in the signal path between the shared second transmitter side input terminal of described second communication system and described third communication system, described the 4th diode is electrically connected along separate routes with signal path between described antenna terminal and second and third receiver side lead-out terminal, described second switch optionally the signal path between described antenna terminal and the described second transmitter side input terminal and described antenna terminal and described second and described the 3rd receiver side lead-out terminal between signal path between switch, described duplexer is set in the signal path of described second communication system and described third communication system described signal path being branched into signal path between described second switch and the described second receiver side lead-out terminal and the signal path between described second switch and described the 3rd receiver side lead-out terminal, in the described HF switch:
Diode with less charge capacity is used as described first diode and described the 3rd diode, and the diode that has than the large charge capacity is used as described second diode and described the 4th diode, thereby makes the charge capacity of described first diode and the 3rd diode always less than the charge capacity of described second diode and the 4th diode.
4. as any described HF switch in the claim 1 to 3, it is characterized in that the charge capacity of described at least one diode with less charge capacity is outside described-10% the scope that has than the charge capacity specification of the diode of large charge capacity.
5. as any described HF switch in the claim 1 to 3, it is characterized in that the described Part No. that has than at least one diode of large charge capacity is different from described Part No. with at least one diode of less charge capacity.
6. a manufacturing has the method for the HF switch of the switch that comprises first diode and second diode, described first diode is electrically connected in series in the signal path between antenna terminal and transmitter side input terminal, described second diode is electrically connected along separate routes with signal path between described antenna terminal and receiver side lead-out terminal, described switch optionally switches between the signal path between the signal path between described antenna terminal and described transmitter side input terminal and described antenna terminal and described receiver side lead-out terminal, and described method comprises:
Charge capacity according to diode will belong to the diode classification of criticizing;
The diode that will have less charge capacity is as described first diode; And
The diode that will have than the large charge capacity is used as described second diode.
7. a manufacturing has antenna multicoupler, the method of the HF switch of first switch and second switch, the back level that wherein said antenna multicoupler is connected electrically in antenna terminal is with the signal path that signal path branched into first communication system and the signal path of second communication system, described first switch is set in the signal path of described first communication system and comprises first diode and second diode, described first diode is electrically connected in series in the signal path between the described antenna terminal and the first transmitter side input terminal, described second diode is electrically connected along separate routes with signal path between the described antenna terminal and the first receiver side lead-out terminal, described first switch optionally switches between the signal path between the signal path between described antenna terminal and the described first transmitter side input terminal and described antenna terminal and the described first receiver side lead-out terminal, described second switch is set in the signal path of described second communication system and comprises the 3rd diode and the 4th diode, described the 3rd diode is electrically connected in series in the signal path between the described antenna terminal and the second transmitter side input terminal, described the 4th diode is electrically connected along separate routes with signal path between the described antenna terminal and the second receiver side lead-out terminal, described second switch optionally switches between the signal path between the signal path between described antenna terminal and the described second transmitter side input terminal and described antenna terminal and the described second receiver side lead-out terminal, and described method comprises:
Charge capacity according to diode will belong to the diode classification of criticizing;
The diode that will have less charge capacity is as described first diode and described the 3rd diode; And
The diode that will have than the large charge capacity is used as described second diode and described the 4th diode.
8. a manufacturing has antenna multicoupler, first switch, the method of the HF switch of second switch and duplexer, wherein, the back level that described antenna multicoupler is connected electrically in antenna terminal is with the signal path that signal path branched into first communication system and the signal path of second communication system and third communication system, described first switch is set in the signal path of described first communication system and comprises first diode and second diode, described first diode is electrically connected in series in the signal path between the described antenna terminal and the first transmitter side input terminal, described second diode is electrically connected along separate routes with signal path between the described antenna terminal and the first receiver side lead-out terminal, described first switch optionally switches between the signal path between the signal path between described antenna terminal and the described first transmitter side input terminal and described antenna terminal and the described first receiver side lead-out terminal, described second switch is set in the signal path of described second communication system and third communication system and comprises the 3rd diode and the 4th diode, described the 3rd diode is electrically connected in series in described antenna terminal and by in the signal path between the shared second transmitter side input terminal of described second communication system and described third communication system, described the 4th diode is electrically connected along separate routes with signal path between described antenna terminal and second and third receiver side lead-out terminal, described second switch optionally switches between the signal path between the signal path between described antenna terminal and the described second transmitter side input terminal and described antenna terminal and described second and third receiver side lead-out terminal, described duplexer is set in the signal path of described second communication system and third communication system described signal path is branched into signal path between described second switch and the described second receiver side lead-out terminal and the signal path between described second switch and described the 3rd receiver side lead-out terminal, and described method comprises:
Charge capacity according to diode will belong to the diode classification of criticizing;
The diode that will have less charge capacity is as described first diode and described the 3rd diode; And
The diode that will have than the large charge capacity is used as described second diode and described the 4th diode.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP287780/2004 | 2004-09-30 | ||
| JP2004287779A JP3841097B2 (en) | 2004-09-30 | 2004-09-30 | Manufacturing method of high frequency switch |
| JP287779/2004 | 2004-09-30 | ||
| JP2004287780A JP3841098B2 (en) | 2004-09-30 | 2004-09-30 | High frequency switch |
| PCT/JP2005/017771 WO2006035783A1 (en) | 2004-09-30 | 2005-09-27 | High frequency switch and method for manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101027847A true CN101027847A (en) | 2007-08-29 |
| CN101027847B CN101027847B (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800323613A Expired - Fee Related CN101027847B (en) | 2004-09-30 | 2005-09-27 | High frequency switch and method for manufacturing the same |
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| Country | Link |
|---|---|
| JP (1) | JP3841097B2 (en) |
| CN (1) | CN101027847B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902212A (en) * | 2009-05-26 | 2010-12-01 | 株式会社村田制作所 | High-frequency model |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3578671B2 (en) * | 1999-07-29 | 2004-10-20 | 松下電器産業株式会社 | Compound switch |
| CN1233100C (en) * | 2000-12-27 | 2005-12-21 | 松下电器产业株式会社 | High-frequency switch, Dual-frequency band high-frequency switch, three-frequency band high-frequenc switch and mobile communication equipment |
| JP2003032001A (en) * | 2001-07-13 | 2003-01-31 | Murata Mfg Co Ltd | Compound high frequency switch, high frequency module and communication device |
| JP4357184B2 (en) * | 2003-02-19 | 2009-11-04 | Ｔｄｋ株式会社 | Front-end module |
-
2004
- 2004-09-30 JP JP2004287779A patent/JP3841097B2/en not_active Expired - Fee Related
-
2005
- 2005-09-27 CN CN2005800323613A patent/CN101027847B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902212A (en) * | 2009-05-26 | 2010-12-01 | 株式会社村田制作所 | High-frequency model |
| US8334731B2 (en) | 2009-05-26 | 2012-12-18 | Murata Manufacturing Co., Ltd. | High-frequency module |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3841097B2 (en) | 2006-11-01 |
| CN101027847B (en) | 2010-05-12 |
| JP2006101426A (en) | 2006-04-13 |
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