CN1157821C - Non reversible circuit equipment and communication equipment using same - Google Patents
Non reversible circuit equipment and communication equipment using same Download PDFInfo
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- CN1157821C CN1157821C CNB00132909XA CN00132909A CN1157821C CN 1157821 C CN1157821 C CN 1157821C CN B00132909X A CNB00132909X A CN B00132909XA CN 00132909 A CN00132909 A CN 00132909A CN 1157821 C CN1157821 C CN 1157821C
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Abstract
In the structure in which a substrate is provided with first and second center electrodes, and is disposed between a ferrite sheet and a magnet, solder resist films are provided on the surfaces of the substrate. The magnet and the center electrodes are separated from each other by means of the solder resin films, whereby the conductor loss, caused by high frequency current flowing in the magnet, is suppressed. Thus, the insertion loss of the nonreciprocal circuit device is reduced.
Description
Technical field
The present invention relates to a kind of non-reversible circuit device, such as isolator in work such as microwave bands, gyrator or the like and comprise the communication equipment of this equipment.
Background technology
In U.S. Patent No. 4016510, the patent application bulletin No.52-134349 of Japanese unexamined, the patent application bulletin 58-3402 of Japanese unexamined discloses the non-reversible circuit device in work such as microwave bands among the patent application bulletin 8-8612 of the patent application bulletin No.9-232818 of Japanese unexamined and Japanese unexamined.
In each aforesaid non-reversible circuit device, the central electrode with predetermined angle of intersection is provided on the ferrite thin plate each other, and static magnetic field is applied to this ferrite thin plate.Irreversible characteristic is according to Faraday's rotation principle, uses the feature of the ferrimagnetism of ferrite thin plate, exists by the plane of polarization that rotates the high frequency magnetic field that is produced by central electrode.
In the disclosed non-reversible circuit device that comprises first, second and the 3rd central electrode among the patent application of the Japanese unexamined bulletin No.8-8612, the matched impedance of the 3rd central electrode has a reactive component and frequency is depended in this impedance.Therefore, the frequency range of the irreversible characteristic that can obtain is narrow.That is, when non-reversible circuit device used as an isolator, it is narrow that this isolation characteristic becomes inevitably.
In order to be provided at the non-reversible circuit device that has good irreversible characteristic in the broadband, the present inventor has carried out the investigation and the experiment of concentrating.In investigation, the inventor has found the reason that insertion loss descends in broadband.Especially, in the non-reversible circuit device of routine, high-frequency current flows through permanent magnet (abbreviating magnet hereinafter as), and because the electrical impedance of magnet and electric consumption.This causes the increase of insertion loss.
Background technology
Therefore, an object of the present invention is to provide a kind of non-reversible circuit device that in broadband, has irreversible characteristic and low insertion loss and the communication equipment that comprises this non-reversible circuit device.
According to the present invention, a non-reversible circuit device is provided, it comprises first central electrode, one end of this electrode is connected to input and other end ground connection, second central electrode, the state downcrossings that insulate between this electrode and first central electrode, two electrodes, one end of second central electrode is connected to output, its other end ground connection, adjacently with first and second central electrodes provide a ferrite part, a magnet, be used for static magnetic field is added in this ferromagnetic parts perpendicular to ferrite part, one end of first capacitor is connected to input and other end ground connection, one end of second capacitor is connected to output, other end ground connection, and an insulating cell between this magnet and first or second central electrode, thus when making high-frequency current flow in this magnet during by this magnet, the high frequency magnetic field that is produced by central electrode make electrical source consumption to be suppressed.
With this structure, central electrode prevents from closely to contact with this magnet, and weakens in the high frequency magnetic field of first and second electrodes generation and the coupling between this magnet.Therefore, the conductor losses that is caused by the high-frequency current of introducing in this magnet can reduce.
Best first and second central electrodes comprise the corrosion stability film that forms respectively on lead model that forms on two opposition sides of substrate and the surface at this lead model.The corrosion stability film is as insulating cell.
A resistance that is connected between input and the output can be installed on the substrate with central electrode.Utilize this structure, the mounting structure of resistance can be simplified, and the configuration of isolator has become simply.
And preferably each lead model comprises the metal forming with at least 30 μ m thickness, and this corrosion stability film has at least 50 μ m thickness.Thereby can suppress the lead loss that they cause oneself by central electrode.In addition, can reduce the lead loss that causes by this magnet effectively.
An insulation film can adhere on this magnet in addition.This insulation film is used as the insulating cell between this magnet and the central electrode.
In addition, the angle of cut can be a predetermined angle that is included between 90 ° and 100 ° between first and second central electrodes.Thereby, the isolation characteristic that can obtain to expect.
Preferably this ferrite part has the parallelepiped shape for rectangle.Thereby, central electrode is arranged in the diagonal of this ferrite part.Therefore, can arrange long central electrode effectively.That is, even ferrite part length is little, non-reversible circuit device of the present invention still has low loss characteristic.
And the capacitance of best first and second capacitors is identical basically.Thereby, even the inductance of first and second electrodes has a difference, the isolation characteristic of expectation is provided with this difference between can the phase place by the phase place of the transmission signal in the forward from the input to the output and the reverse about 180 ° transmission signal from the output to the input and obtains.
And best first and second central electrodes, ferrite part, magnet and first and second capacitors respectively by magnet yoke ring around and conductively-closed, a magnetic circuit and this yoke that yoke is configured for applying this static magnetic field have earth potential.Utilize this structure, first and second central electrodes and this capacitor have an earth potential with the yoke of shielding.
In addition, be preferably between this yoke and this central electrode insulating cell is provided.Thereby yoke from this central electrode separately so that be suppressed at the high-frequency current that produces in this yoke, strengthens the Q value, and reduces insertion loss.
And a plurality of earth terminals preferably are provided, provide input and at least two earth terminals one of in the both sides of this box, and provide output and at least two remaining earth terminals at the opposite side of this box.Thereby, strengthen ground connection connection, so that suppress unnecessary inductance or static capacitive element, reduce the electric wave that directly from the input to the output, arrives, and widen frequency bandwidth (bandwidth is represented low insertion loss characteristic).
According to the present invention, provide a kind of communication equipment that comprises above-described non-reversible circuit device.For example, provide this non-reversible circuit device so that form this communication equipment in the output of oscillating circuit, importation of filter or the like.
Description of drawings
Fig. 1 is the decomposition diagram according to an isolator of the first embodiment of the present invention;
Fig. 2 is the cross section of the major part of this isolator;
Fig. 3 is the circuit diagram of this isolator;
Fig. 4 A and 4B are the circuit diagrams of the operating principle of this isolator of expression;
Fig. 5 is the equivalent circuit diagram of this isolator;
Fig. 6 is the curve chart of this isolator of expression and the example of the insertion loss characteristic of the isolator of routine;
Fig. 7 is the cross section of the major part of isolator according to a second embodiment of the present invention;
Fig. 8 is the decomposition diagram of an isolator of a third embodiment in accordance with the invention;
Fig. 9 is the cross section of the major part of this isolator;
Figure 10 A, 10B, 10C and 10D are the curve charts of the frequency characteristic of this isolator of expression;
Figure 11 A, 11B, 11C and 11D are the curve chart of expression as the frequency characteristic of the isolator of the example of a comparison of the isolator of the 3rd embodiment;
Figure 12 A and 12B are thickness and the thickness of relation between the insertion loss and central electrode and the curve charts of the relation between the insertion loss of expression welding resistance film; With
Figure 13 A and 13B are the block diagrams of the configuration of the major part of the communication equipment of a fourth embodiment in accordance with the invention shown in the difference.
Embodiment
Structure according to the isolator of the first embodiment of the present invention will be described referring to figs. 1 to 6.
Fig. 1 is the decomposition diagram of this isolator.Resin box 1 is to use input- output end 2a and 2b and earth terminal 3, and moulding forms by inserting, and wherein represented a 2a of input-output end.Another input-output end 2b and another pair earth terminal 3 are formed on the left dorsal surface among Fig. 1 of resin box.The inner of two input- output end 2a and 2b is exposed to the interior bottom surface of resin box 1.This isolator comprises the ferrite thin plate of being made by ferrimagnet 5, has the capacitor 7a and the 7b of electrode for capacitors on its upper and lower surface, a chip resistor 8 and a lower yoke 9 of being made by ferromagnetic material 9. Capacitor 7a and 7b and chip resistor chip resistor 8 are placed in the box 1.Ferrite thin plate 5 is placed on the concavity place that is limited by box 1 and lower yoke 9.Form the first central electrode 4a and the second central electrode 4b, each other on insulating thin 14 and lower surface on intersect with the predetermined angle of cut between 90 ° and 100 °.The end of two central electrode 4a and 4b leads to a following side among Fig. 1 through through hole.The other end of central electrode 4a and 4b is connected to each other through through hole.Substrate 14 is by carrying out molded formation to the high-frequency circuit substrate, and this substrate is the insulating substrate with Copper Foil of the both sides that are connected to it.Place a magnet 6 static magnetic field is added to central electrode 4a and 4b and ferrite thin plate 5.Form upper magnet yoke 10 by ferromagnetic material.Upper magnet yoke 10 is made by ferromagnetic material.Magnet 6 is attached to the inner face (lower surface among Fig. 1) of upper magnet yoke 10.
Form the corresponding part of isolator as mentioned above.Ferrite thin plate 5 is contained in the box 1. Capacitor 7a and 7b are placed on wherein, and substrate 14 is placed by this way: capacitor 7a and 7b are clipped in the middle of substrate 14 and the box 1.Chip resistor 8 is installed in the lower surface of substrate 14 by this way so that the two ends of the be connected to each other first and second central electrode 4a and 4b.Lower yoke 9 is attached to the downside of box 1.The upper magnet yoke 10 of enclosing magnet 6 covers box 1.Therefore make isolator of as a whole formation.
Fig. 2 is the cross section of the major part of above-described isolator.As what in Fig. 2, see, on two whole surfaces of substrate 14, form welding resistance film 11 respectively.Therefore, welding resistance film 11 is placed on respectively on the surface of first and second central electrodes.Even magnet 6 is placed near substrate 14, the magnet 6 and the first central electrode 4a are separated from each other by the thickness of welding resistance film 11.And central electrode and upper magnet yoke also separate each other by the layer of welding resistance film.Similarly, the ferrite thin plate 5 and the second central electrode 4b are separated from each other by the thickness of welding resistance film 11 at least.The thickness of above-mentioned welding resistance film 11 is 50 μ m at least, and the thickness of corresponding first and second central electrodes is 30 μ m at least.
Figure 12 A represents the relation of distance and insertion loss (IL) between magnet 6 and the central electrode 4a.Distance between magnet 6 and central electrode 4a hour, the high-frequency current that is caused by eddy current flows in magnet 6, because the electrical impedance of magnet 6 and electric consumption.In addition, magnet 6 has big dielectric loss angle tangent (tan).Therefore, when magnet 6 was settled near central electrode 4a, dielectric loss had increased.In addition, yoke 9 and 10 and central electrode 4a and 4b between distance more little, therefore the high-frequency current amount of flow that is caused by eddy current is big more, because the electrical impedance of yoke makes power supply be consumed.These make insertion loss increase.
For the purpose of reducing loss, central electrode and magnet, and central electrode and yoke utilize the welding resistance film to be separated from each other respectively.Have outside being of a size of in the isolator of 5mm * 5mm * 2mm, insertion loss (IL) changes along with the thickness of welding resistance film, as shown in Figure 12 A.Like this, the thickness of welding resistance film is big more, and insertion loss (IL) becomes more little, and promptly saturated when this thickness surpasses about 50 μ m.When the thickness of welding resistance film was 50 μ m, insertion loss was 1.3dB.Therefore, the thickness of each above-mentioned welding resistance film is arranged on 50 μ m or more.
Figure 12 B represents the thickness of each central electrode and the relation between the insertion loss (IL).In this case, the thickness of welding resistance film is set to 50 μ m, and as what see in the superincumbent description, the thickness of central electrode is big more, and electrical impedance becomes more little (increase of Q value), so insertion loss reduces.Insertion loss (IL) changes along with the thickness difference of central electrode, shown in Figure 12 B.Like this, the thickness of central electrode is big more, and insertion loss (IL) becomes more little, and promptly saturated when this thickness surpasses about 30 μ m.When the thickness of central electrode was 30 μ m, insertion loss was 1.3dB.In addition, as mentioned above, the insertion loss of requirement generally is to reach 1.3dB.Therefore, the thickness of each central electrode 4a and 4b is arranged on 30 μ m or bigger.For the height of minimizing isolator as much as possible, the thickness of each central electrode 4a and 4b is arranged on about 40 μ m.
Fig. 3 is the circuit diagram of above-mentioned isolator.In the circuit of this example, ferrite thin plate 5 is dish types.As shown in FIG. 3, the first central electrode 4a is connected between input 2a and the earth terminal 3, the second central electrode 4b is connected between output 2b and the earth terminal 3, capacitor C1 is connected between input 2a and the earth terminal 3, the second capacitor C2 is connected between output 2b and the earth terminal 3, in addition, resistance R is connected between input 2a and the output 2b.
Fig. 4 A and 4B are the circuit diagrams of the operating principle of the above-described isolator of explanation.Fig. 5 is the equivalent circuit diagram of this isolator.
In Fig. 4 A and 4B, arrow is illustrated in the direction of the high frequency magnetic field below the central electrode.The transmission of signal in the direction is described now.At the two ends of resistor R, produce identical phase place and identical amplitude, therefore there is not current flows through resistor R.Input signal from input 2a is in statu quo exported from output 2b.
Signal enters in the present description inverse direction.As seeing in Fig. 4 B, the direction of the high frequency magnetic field that sends by ferrite thin plate 5 is reverse with the direction shown in Fig. 4 A.Therefore, produce 180 ° at the two ends of resistor R and depart from phase signal, and in resistor R electric consumption.Therefore ideally, there is not signal to export from input 2a.
In fact, according to the angle of cut between above-described central electrode 4a and the 4b with because faraday's anglec of rotation of rotating the plane of polarization of generation, the difference between the phase place at the two ends of resistor of generation is changed when the direction signal sends and when the inverse direction signal is imported.Therefore, the intensity of definite external magnetic field and the angle of cut between central electrode 4a and the 4b are so that can obtain little insertion loss and high isolation characteristic by this way, and usually, the intensity that is added to the magnetic field of this ferrite thin plate is 0.09 to 0.17 (T).Therefore, be in 90 ° to 100 ° the scope by the angle of cut between central electrode 4a and the 4b is set, can obtain little insertion loss and high isolation characteristic.
About above-described operation, by remove resistance R from the equivalent circuit diagram of Fig. 5, the phase difference between signal S12 (at the transmitting signal of inverse direction) and the signaling S21 (at the transmission signal of direction) becomes 180 °.If the inductance L 1 of central electrode 4a and 4b and L2 have a difference, then phase difference departs from 180 °.But, by capacitor C1 and C2 are provided, and static electric capacity is set is equal to each other, can prevent departing from of above-mentioned phase difference.Therefore, even the amplitude difference between S21 and the S12 approximately is 0.2dB, (C1, capacitance C2) is set to be substantially equal to have each other ± 0.05 (5%) difference, so that the isolation of at least 30 dB is set for capacitor 7a and 7b.Thereby, even the size of the model that first and second central electrodes form is disperseed the also isolation characteristic that can obtain.
Fig. 6 is the insertion loss characteristic and conventional isolator curve chart relatively of the isolator of this embodiment of expression, and the welding resistance film wherein is not provided on the surface of substrate.As mentioned above, utilize the welding resistance film that on the surface of this substrate, forms,, can in a wide frequency range, reduce insertion loss by separating central electrode and this magnet.
Next the structure of isolator is according to a second embodiment of the present invention described with reference to Fig. 7.
Fig. 7 is the cross section of major part of the isolator of second embodiment.This cross section is to represent corresponding to the cross section of first embodiment of Fig. 2.In this embodiment, insulation film 13 is bonded in the surface on the substrate side of magnet 6.In addition, on the surface of central electrode 4a that provides on the both sides of substrate 14 and 4b, do not form the welding resistance film respectively.Utilize this structure, at least by insulation film 13, magnet 6 and central electrode 4a can be separated from each other, so that can reduce the power loss that is caused by magnet 6.That is insertion loss characteristic, can be improved.In the structure of Fig. 7, the welding resistance film can form on the surface of the substrate 14 of central electrode 4a with superincumbent formation and 4b.Thereby, the thickness by using the welding resistance film and the thickness of insulation film 13, magnet 6 and the central electrode 4a predetermined distance that can be separated from each other.
Secondly, the structure of the isolator of a third embodiment in accordance with the invention is described with reference to Fig. 8 to Figure 11 A, 11B, 11C and 11D.
Fig. 8 is the decomposition diagram of this isolator.Resin box 1 forms by inserting moulding with input-output end and earth terminal 3.A 2b who has represented this input-output end.Another input-output end 2b and another pair earth terminal 3 are provided at the left rear side among Fig. 8 of resin box 1.The inside end of two input-output ends of two inputs is exposed on the inner bottom surface of box 1.In box 1, placed capacitor 7a and 7b and a chip resistor chip resistor 8 of on its upper and lower surface, having electrode for capacitors, and be contained in the concavity place that limits by box 1 and lower yoke by the ferrite thin plate 5 that ferrimagnetic material forms.The central electrode 4a and the 4b that are formed respectively by Copper Foil are provided, so that prolong from the upper surface of ferrite thin plate 5 to lower surface and intersect each other with the predetermined angle of cut in the diagonal of ferrite thin plate 5.Provide a magnet 6 that static magnetic field is added to central electrode 4a and 4b and ferrite thin plate 5.Form upper magnet yoke 10 by ferromagnetic material.Magnet 6 is bonded in the inner face (lower surface among Fig. 8) of upper magnet yoke 10.The insulating cell 12 resin sheet manufacturing, that have preset thickness divides magnet 6 to be opened with central electrode 4a and 4b.Lower yoke 9 is formed by ferromagnetic material.
Form the corresponding part of isolator as mentioned above. Capacitor 7a and 7b and chip resistor chip resistor 8 are installed in the box 1.In addition, central electrode 4a and 4b are installed in wherein with ferrite thin plate 5.At this state, capacitor 7a and 7b are between the electrode and central electrode 4a and 4b that is clipped in the box 1.Then, lower yoke 9 is attached to the downside of box 1.The upper magnet yoke 10 that have magnet 6, adds is in advance made and is used for covering, thereby this isolator is done as a whole formation.
Fig. 9 is the cross section of the major part of above-described isolator.In this drawing, lower yoke 9 and upper magnet yoke 10 have been omitted.As shown in FIG. 9, it is insulated from each other that central electrode 4a and 4b utilize insulation film 15.Place insulating cell 12 between two ends by inserting central electrode 4a and 4b and the magnet 6, so that magnet 6 and central electrode 4b keep the interval be scheduled to.
According to the length of ferrite gauge of sheet and central electrode, change each input-output impedance of this isolator.But,, can reduce the loss that the mismatch by impedance causes by mating this impedance and input-output line impedance.This embodiment uses the ferrite thin plate 5 with such thickness: the basal surface of ferrite thin plate 5 be placed on box 1 surface above.The thickness of box 1 can reduce, so that the grounding electrode of the central electrode that provides on the lower surface of this ferrite thin plate contacts closely with lower yoke.
Figure 10 A, 10B, 10C and 10D are the curve charts of the frequency characteristic of the above-described isolator of expression.Figure 11 A, 11B, 11C and 11D are the curve charts of representing the frequency characteristic of isolator as a comparison.Figure 10 A and 11A represent input reflection characteristic (S11), and Figure 10 B and 11B represent transmission characteristic (S21), and Figure 10 C and 11C represent insulation characterisitic (S12), and Figure 10 D and 11D represent output reflection characteristic (S22).
In the isolator with the curve in Figure 10 A, 10B, 10C and 10D, the angle of cut of two central electrodes is 90 °, and this resistor is to be connected between the input-output end, as shown in FIG. 5.On the other hand, the isolator with the curve in Figure 11 A, 11B, 11C and 11D comprises three central electrodes with 120 ° of angles of cut, and an end of the 3rd central electrode is through a resistance-grounded system.The size of the ferrite thin plate that uses in two isolators is identical.
When using two central electrodes and the angle of cut during, as mentioned above, can in a broadband, obtain the isolation characteristic of getting well less than 120 °.According to the present invention, the angle of cut that comprises such two central electrodes and have an electrode less than 120 ° isolator in, insertion loss has reduced.Therefore, the isolation characteristic that in a wide frequency range, can obtain little insertion loss and in a broadband, can obtain.
Next the configuration of communication equipment is described with reference to Figure 13.
Vibration output at oscillator such as VCO or the like provides one of above-described dissimilar isolator, as shown in Figure 13 A, therefore prevents to enter this oscillator from the reflected wave of the transtation mission circuit of the output that is connected to this isolator.Thereby the oscillatory stability of oscillator has strengthened.
In addition, as shown in Figure 13 B, provide an isolator to be used for coupling in the importation of filter.Thereby, the filter of a constant impedance of formation.In the transmitter/receiver circuit part, provide this circuit so that form a communication equipment.
Among the embodiment of Miao Shuing, use this non-reversible circuit device in the above as an isolator.When forming according to the sending direction between two ports when having phase lag and being the gyrator (irreversible phase shifter) of different characteristic, chip resistor 8 (resistance R in the equivalent electric circuit of Fig. 3 and 4) is removed.
According to the present invention, can avoid central electrode closely to contact with this magnet, therefore the high frequency magnetic field that is caused by first or second central electrode can weaken to the coupling of this magnet, and can be reduced by the loss that the high-frequency current of introducing in this magnet causes.
In addition, this insulating cell substrate of can be simply having in the above a lead model that forms with the corrosion stability film by covering provides.Therefore, the total of non-reversible circuit device can be simplified, and the quantity of parts can reduce.
And the mounting structure of resistance can be simplified, and the configuration of isolator can easily be disposed.
In addition, can suppress the lead loss that they cause oneself by central electrode, and the conductor losses that is caused by this magnet can reduce effectively.Therefore, doing as a whole this insertion loss can reduce effectively.
The insulation film that preferably is bonded to this magnet uses as the insulating cell between this magnet and this central electrode.Therefore, keep the structure of this insulating cell to become simply, and assembling can easily be carried out.
In addition, can obtain low insertion loss and high insulation characterisitic.
Central electrode can be arranged in the diagonal of this ferromagnetic parts.That is, can arrange long central electrode effectively.Therefore, even this ferromagnetic parts size is little, also can obtain low loss characteristic.This non-reversible circuit device can be by comprising that cutting has a kind of method formation of the ferrimagnet of thin plate or rectangular parallelepiped protrusion part shape.The manufacturing of this equipment has become simply.
In addition, even the inductance of first and second electrodes has a difference, the difference in the phase place of the transmission signal in the direction from the input to the output and the inverse direction from the output to the input between the phase place of transmission signal becomes 180 °.Therefore, the insulation characterisitic that can obtain to expect.
In addition, first and second central electrodes and this capacitor have an earth potential with the yoke of conductively-closed.Therefore, can suppress the generation of false component.
Yoke is separated with this central electrode, makes to be suppressed at the high-frequency current that produces in this yoke, strengthens the Q value and reduces insertion loss.
In addition, ground connection can strengthen, and can suppress unnecessary inductance or static capacitive element.Therefore, advantageously, reduce the electric wave of direct arrival, and bandwidth becomes wideer from this input to this output.
In addition, by in the output of oscillating circuit or in the importation of filter, providing non-reversible circuit device, can obtain to have the communication equipment of low-loss and stable properties.
Claims (13)
1. non-reversible circuit device, it comprises first central electrode, one end of this electrode is connected to input and other end ground connection, second central electrode, under the state that insulate between the electrode, intersect with first central electrode, one end of second central electrode is connected to output, its other end ground connection, adjacently with first and second central electrodes provide a ferrite part, a magnet, be used for static magnetic field is added in this ferrite part perpendicular to ferrite part, one end is connected to first capacitor of input and other end ground connection, one end is connected to output, second capacitor of other end ground connection, and an insulating cell between this magnet and first or second central electrode.
2. according to the non-reversible circuit device of claim 1, wherein first and second central electrodes comprise that respectively lead model that the two opposite sides at substrate forms and this insulating cell are the corrosion stability films that forms on the surface at this lead model.
3. according to the non-reversible circuit device of claim 2, a resistance that wherein is connected between this input and this output is installed on this substrate.
4. according to the non-reversible circuit device of claim 2, wherein each lead model comprises the thickness that metal forming with at least 30 μ m thickness and this corrosion stability film have at least 50 μ m.
5. according to the non-reversible circuit device of claim 1, wherein this insulating cell is the insulation film that bonds to this magnet.
6. according to the non-reversible circuit device of claim 1, wherein the angle of cut between first and second central electrodes is a predetermined angle that is included between 90 ° and 100 °.
7. according to the non-reversible circuit device of claim 1, wherein this ferrite part has the parallelepiped shape of rectangle.
8. according to the non-reversible circuit device of claim 1, wherein the capacitance of first and second capacitors is identical.
9. according to the non-reversible circuit device of claim 1, wherein first and second central electrodes, this ferrite part, this magnet and first and second capacitors be by the shielding magnet yoke ring around, described yoke constitutes the magnetic circuit that applies this static magnetic field, and this yoke has earth potential.
10. according to the non-reversible circuit device of claim 9, wherein between this yoke and this central electrode, provide insulating cell respectively.
11. according to the non-reversible circuit device of claim 1, wherein provide a plurality of earth terminals, input and at least two earth terminals are that the side at this box provides, and provide output and at least two remaining earth terminals at the opposite side of this box.
12. according to the non-reversible circuit device of claim 1, wherein the angle of cut between first and second central electrodes is 90 °.
13. communication equipment, comprise non-reversible circuit device, described non-reversible circuit device comprises: first central electrode, one end of this electrode is connected to input and other end ground connection, second central electrode, under the state that insulate between the electrode, intersect with first central electrode, one end of second central electrode is connected to output, its other end ground connection, adjacently with first and second central electrodes provide a ferrite part, a magnet, be used for static magnetic field is added in this ferrite part perpendicular to ferrite part, one end is connected to first capacitor of input and other end ground connection, and an end is connected to output, second capacitor of other end ground connection, and an insulating cell between this magnet and first or second central electrode.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP291557/1999 | 1999-10-13 | ||
| JP11291557A JP3080621B1 (en) | 1999-10-13 | 1999-10-13 | Slider for forming coil fastener joints |
| JP2000271671A JP2001185912A (en) | 1999-10-13 | 2000-09-07 | Non-reciprocal circuit element and communication device |
| JP271671/2000 | 2000-09-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1303138A CN1303138A (en) | 2001-07-11 |
| CN1157821C true CN1157821C (en) | 2004-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB00132909XA Expired - Lifetime CN1157821C (en) | 1999-10-13 | 2000-10-12 | Non reversible circuit equipment and communication equipment using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1157821C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742783B (en) * | 2011-05-31 | 2019-05-17 | 比亚迪股份有限公司 | A kind of near-field communication aerial |
| JP6939860B2 (en) * | 2019-09-20 | 2021-09-22 | Tdk株式会社 | Lossy circuit element |
-
2000
- 2000-10-12 CN CNB00132909XA patent/CN1157821C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1303138A (en) | 2001-07-11 |
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