CN205666116U - High -frequency transformer , high frequency components and parts and communication terminal device - Google Patents
High -frequency transformer , high frequency components and parts and communication terminal device Download PDFInfo
- Publication number
- CN205666116U CN205666116U CN201490000748.5U CN201490000748U CN205666116U CN 205666116 U CN205666116 U CN 205666116U CN 201490000748 U CN201490000748 U CN 201490000748U CN 205666116 U CN205666116 U CN 205666116U
- Authority
- CN
- China
- Prior art keywords
- inducer
- coil
- conductive pattern
- high frequency
- output port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004891 communication Methods 0.000 title claims abstract description 20
- 239000004020 conductor Substances 0.000 claims abstract description 64
- 230000008878 coupling Effects 0.000 claims abstract description 17
- 238000010168 coupling process Methods 0.000 claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 claims abstract description 17
- 239000000411 inducer Substances 0.000 claims description 176
- 239000000758 substrate Substances 0.000 claims description 42
- 230000004907 flux Effects 0.000 claims description 40
- 239000010410 layer Substances 0.000 description 52
- 238000010586 diagram Methods 0.000 description 20
- 230000009467 reduction Effects 0.000 description 8
- 230000033228 biological regulation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical compound CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/09—Filters comprising mutual inductance
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F19/00—Fixed transformers or mutual inductances of the signal type
- H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
- H01F2027/2809—Printed windings on stacked layers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H2001/0021—Constructional details
- H03H2001/0085—Multilayer, e.g. LTCC, HTCC, green sheets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Coils Or Transformers For Communication (AREA)
- Networks Using Active Elements (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The utility model relates to an inductor is each other with the high -frequency transformer of high degree of coupling coupling to and possess the high frequency components and parts and the communication terminal device of this transformer. First inductor and second inductor are by forming at multi -storied conductor pattern composition, conductor pattern (the L1a of first inductor, L1b, L1c, ) and conductor pattern (the L2a of second inductor L1d, L2b, L2c, ) the quilt is set up and is done, respective coil coiling axle orientation layer direction, respective coil opening is divided into first coil opening (CA1) and this two department of second coil opening (CA2) (coil opening), the conductor pattern of first inductor and the conductor pattern of second inductor are alternative separately to be striden across two departments of first coil opening (CA1) and second coil opening (CA2) and connects, the electric current is under the state that switches on between an inputoutput port (P1) and the 3rd inputoutput port (P3), utilize first inductor and second inductor to constitute the closed loop at the magnetic flow that first coil opening produced.
Description
Technical field
This utility model relates to the high frequency transformer that inducer couples each other with the high degree of coupling, and possesses high frequency components and parts and the communication terminal of this transformator.
Background technology
Along with electronic equipment and the miniaturization/thinning of supply unit, also advance the miniaturization/thinning of built-in transformer.As one of method of coefficient of coup deterioration that reply miniaturization is brought, as described in patent documentation 1 or patent documentation 2, multiple layers are formed first siding ring and second siding ring, constitutes the stepped construction (double team structure) making a coil be sandwiched by another coil the most effective.
Prior art literature
Patent documentation
Patent documentation 1: No. 3057203 publications of Japanese Patent No.
Patent documentation 2: No. 3063417 publications of Japanese Patent No.
Utility model content
Utility model technical problem to be solved
But, in above-mentioned double team structure, produce following problem along with the further miniaturization of transformator.
In order to form double team structure, it is desirable to have for connecting first siding ring each other or second siding ring wiring each other, but miniaturization got over by transformator, and the ratio that this wiring occupies is the biggest.Owing to this wiring is entirely without helping the coupling of first siding ring and second siding ring, therefore due to its existence, the coefficient of coup of first siding ring and second siding ring is made to deteriorate.Thus, transformator is the most small-sized, forms the effect more reduction sandwiching structure.
It addition, during exploitation miniature transformer, the existence of above-mentioned wiring becomes the biggest bottleneck.That is, in order to make interlayer connection conductor i.e. via not contact with coil conductor pattern, via and coil conductor pattern need to keep the distance of regulation.For this reason, it may be necessary to reduce the size of coil.The size of coil diminishes, and the inductance in the most each layer reduces, then need to increase stacking number, need more wiring layer.As a result, not only coefficient of coup deterioration, and also the Q-value of coil also deteriorates.
Then, the purpose of this utility model is to provide the high frequency transformer of the reduction of the reduction of a kind of coefficient of coup suppressing miniaturization to cause and Q-value, and possesses high frequency components and parts and the communication terminal of this transformator.
Solve the technical scheme that technical problem is used
High frequency transformer of the present utility model, it is characterised in that including:
First inducer, this first inducer is connected between the first input/output port (power supply terminal) and the second input/output port (antenna terminal)；And second inducer, this second inducer is connected between the second input/output port and the 3rd input/output port (ground terminal), the first inducer and the coupling of the second inducer phase mutual magnetic field,
First inducer and the second inducer are made up of the conductive pattern formed in multilamellar,
The conductive pattern of the first inducer and the conductive pattern of the second inducer are arranged to, respective coil wireline reel is towards the layer direction of described multilamellar, respective coil aperture be divided into first coil opening and the second coil aperture this at two (coil aperture)
The conductive pattern of the first inducer and the conductive pattern of the second inducer the most alternately stride across at described first coil opening and described second coil aperture two and connect,
First input/output port and the 3rd input/output port are arranged on the first side of the stacked direction of described multilamellar, and the second input/output port is arranged on the second side,
Electric current turns between described first input/output port and described 3rd input/output port, utilize the magnetic flux that the first inducer and the second inducer produce at first coil opening towards, and the magnetic flux produced in the second coil aperture towards the most aligned, and the direction of the magnetic flux produced at first coil opening and the direction opposite direction each other (constitute Guan Bi magnetic flux) of magnetic flux that produces in the second coil aperture.
It addition, high frequency transformer of the present utility model, it is characterised in that including:
First transformator, this first transformator includes: the first inducer, and this first inducer is connected between the first input/output port and the second input/output port；And second inducer, this second inducer is connected between the second input/output port and the 3rd input/output port, the first inducer and the coupling of the second inducer phase mutual magnetic field,
And second transformator, this second transformator includes: the 3rd inducer, and the 3rd inducer is connected between the first input/output port and the second input/output port；And the 4th inducer, the 4th inducer is connected between the second input/output port and the 3rd input/output port, the 3rd inducer and the coupling of the 4th inducer phase mutual magnetic field,
First inducer, the second inducer, the 3rd inducer and the 4th inducer are made up of the conductive pattern formed in multilamellar,
The conductive pattern of the first inducer and the conductive pattern of the second inducer are arranged to, respective coil wireline reel towards the layer direction of described multilamellar, respective coil aperture be divided into first coil opening and the second coil aperture this at two,
The conductive pattern of the 3rd inducer and the conductive pattern of the 4th inducer are arranged to, respective coil wireline reel towards the layer direction of described multilamellar, respective coil aperture be divided into described first coil opening and described second coil aperture this at two,
The conductive pattern of the first inducer and the conductive pattern of the second inducer the most alternately stride across at described first coil opening and described second coil aperture two and connect,
The conductive pattern of the 3rd inducer and the conductive pattern of the 4th inducer the most alternately stride across at described first coil opening and described second coil aperture two and connect,
Electric current turns between described first input/output port and described 3rd input/output port, first coil opening produce magnetic flux towards and second coil aperture produce magnetic flux towards the most aligned, and the direction of the magnetic flux produced at first coil opening and the direction opposite direction each other of magnetic flux that produces in the second coil aperture
First inducer and the 3rd inducer are connected in parallel, and the second inducer and the 4th inducer are connected in parallel.
It addition, high frequency transformer of the present utility model, it is characterised in that including:
One inducer, this inducer is connected between the first input/output port and the second input/output port；And another inducer, this another inducer is connected between the second input/output port and the 3rd input/output port, one inducer and another inducer phase mutual magnetic field described coupling,
One inducer has first coil conductive pattern and tertiary coil conductive pattern,
Another inducer described has the second coil conductor pattern and the 4th coil conductor pattern,
Described first coil conductive pattern and described tertiary coil conductive pattern are sandwiched by described second coil conductor pattern and described 4th coil conductor pattern.
High frequency components and parts of the present utility model, it is characterised in that possess high frequency transformer,
Described high frequency transformer has above-mentioned structure.
Communication terminal of the present utility model, it is characterised in that possess high frequency transformer in the transport part of signal of communication,
Described high frequency transformer has above-mentioned structure.
Utility model effect
In high frequency transformer of the present utility model, owing to having described such structure, the wiring that thus be accordingly used in the conductive pattern being formed in connection in different layers reduces, the reduction of the coefficient of coup that suppression miniaturization causes and the reduction of Q-value, the high frequency transformer that the coefficient of coup is high can be realized, and possess high frequency components and parts and the communication terminal of this transformator.
Accompanying drawing explanation
Fig. 1 is the exploded perspective view of the high frequency transformer that the first embodiment relates to.
Fig. 2 is the plane graph of the conductive pattern that each substrate layer of the high frequency transformer related at the first embodiment is formed.
Fig. 3 is the circuit diagram of the high frequency transformer that the first embodiment relates to.
Fig. 4 (A) is the plane graph of the high frequency transformer that the first embodiment relates to, and Fig. 4 (B) is its longitudinal sectional view, be represent the magnetic flux by the two of high frequency transformer coil aperture towards figure.
Fig. 5 (A) is the circuit diagram possessing high frequency transformer that the first embodiment relates to as the antenna assembly 101 of antenna-matching circuit, and Fig. 5 (B) is its equivalent circuit diagram.
Fig. 6 is the plane graph of the conductive pattern that each substrate layer of the high frequency transformer related at the second embodiment is formed.
Fig. 7 is the circuit diagram of the high frequency transformer that the 3rd embodiment relates to.
Fig. 8 is the plane graph of the conductive pattern that each substrate layer of the high frequency transformer related at the 4th embodiment is formed.
The circuit diagram of the antenna front ends module that Fig. 9 is the antenna of the communication terminal that the 5th embodiment relates to and this antenna is connected.
Figure 10 is the circuit diagram possessing high frequency transformer 206 that the 6th embodiment relates to as the antenna assembly 106 of antenna-matching circuit.
Figure 11 is the circuit diagram of the high frequency transformer 206 that the 6th embodiment relates to.
Figure 12 is the exploded perspective view of the high frequency transformer 206 that the 6th embodiment relates to.
Figure 13 is the plane graph of the conductive pattern that each substrate layer of the high frequency transformer 206 related at the 6th embodiment is formed.
Figure 14 is the circuit diagram of the high frequency transformer that the 7th embodiment relates to.
Figure 15 is the circuit diagram of the high frequency transformer of the parallel circuit possessing three inducers.
Detailed description of the invention
Hereinafter, list several specific example, represent and be used for implementing mode of the present utility model.Each embodiment is only and illustrates, and the most different structures shown in embodiment can carry out aliquot replacement or combine the embodiment obtaining other further.
" the first embodiment "
Fig. 1 is the exploded perspective view of the high frequency transformer 201 that the first embodiment relates to.Fig. 2 is the plane graph of the conductive pattern of each substrate layer formation at this high frequency transformer 201.Fig. 1 omits the diagram of each substrate layer.
The high frequency transformer 201 of the first embodiment is in the high-frequency circuit in communication terminal etc., for the transformator of impedance matching circuit etc., is constituted in the way of may be installed the chip-shaped components and parts on the surface of printed wiring board etc..
In this high frequency transformer 201, first inducer is connected between the first input/output port P1 (power supply terminal) and the second input/output port P2 (antenna terminal), and the second inducer is connected between the second input/output port P2 (antenna terminal) and the 3rd input/output port P3 (ground terminal).
As in figure 2 it is shown, form various conductive pattern on multiple substrate layer S1～S10.Substrate layer S1 is formed conductive pattern 313,314.Conductive pattern 211 is formed respectively on substrate layer S2, substrate layer S3 is formed conductive pattern 111,212, substrate layer S4 is formed conductive pattern 122,221, substrate layer S5 is formed conductive pattern 122,222, substrate layer S6 is formed conductive pattern 123,223, substrate layer S7 is formed conductive pattern 131,231, substrate layer S8 is formed conductive pattern 132,232, substrate layer S9 is formed conductive pattern 141,233.It addition, form conductive pattern 312 on substrate layer S10.
The lowermost part of Fig. 2 represents the lower surface of substrate layer S1.Substrate layer S1 lower surface is formed conductive pattern P1, P2, P3.Interlayer connection conductor (via conductor) is formed at each interlayer.Additionally, the end face of duplexer is formed respectively: connect the end electrode between conductive pattern 312 and conductive pattern P2, connect the end electrode between conductive pattern 313 and conductive pattern P3, and connect the end electrode between conductive pattern 314 and conductive pattern P1.
Conductive pattern 111 constitutes first coil conductive pattern L1a.Conductive pattern 121,122 is connected in parallel.Conductive pattern 123 is connected with this parallel circuit in series.These conductive patterns 121,122,123 constitute first coil conductive pattern L1b.It addition, conductive pattern 131,132 is connected in series, constitute first coil conductive pattern L1c.Further, conductive pattern 141 constitutes first coil conductive pattern L1d.It addition, conductive pattern 211,212 is connected in series, constitute the second coil conductor pattern L2a.Conductive pattern 221,222,223 is connected in series, and constitutes the second coil conductor pattern L2b.Conductive pattern 231,232,233 is connected in series, and constitutes the second coil conductor pattern L2c.
First coil conductive pattern L1a, L1b, L1c, L1d constitute the first inducer (L1), and the second coil conductor pattern L2a, L2b, L2c constitute the second inducer (L2).
As it is shown in figure 1, first coil conductive pattern L1a, L1b, L1c, L1d and the second coil conductor pattern L2a, L2b, L2c respective coil wireline reel are towards the layer direction of multilamellar.Further, conductive pattern is arranged to respective coil aperture be divided into first coil open C A1 and the second coil aperture CA2 this at two (coil aperture).That is, the coil aperture of first coil conductive pattern L1a, L1c constitutes first coil open C A1, and the coil aperture of first coil conductive pattern L1b, L1d constitutes the second coil aperture CA2.It addition, the coil aperture of the second coil conductor pattern L2a, L2c constitutes the second coil aperture CA2, the coil aperture of the second coil conductor pattern L2b constitutes first coil open C A1.
First coil conductive pattern L1a, L1b, L1c, L1d and the second coil conductor pattern L2a, L2b, L2c the most alternately stride across and connect at first coil open C A1 and the second coil aperture CA2 two.
First input/output port P1 and the 3rd input/output port P3 is arranged on first side (bottom surface side) of the stacked direction of multiple substrate layer, and the second input/output port P2 is arranged on the second side (top surface side).
Fig. 3 is the circuit diagram of high frequency transformer 201 of the present embodiment.Here, the pattern illustrated consider constitute the first inducer and the second inducer conductive pattern relation is set.Fig. 4 (A) is the plane graph of this high frequency transformer 201, and Fig. 4 (B) is its longitudinal sectional view, is the figure in the direction of the magnetic flux representing two coil aperture by high frequency transformer 201.
As Fig. 3 and Fig. 4 understands, electric current turns between the first input/output port P1 and the 3rd input/output port P3, utilize the magnetic flux that the first inducer L1 and the second inducer L2 produce in first coil open C A1 towards, and second coil aperture CA2 produce magnetic flux towards the most aligned, and the direction of the magnetic flux produced in first coil open C A1 and the direction opposite direction each other of magnetic flux that produces in the second coil aperture CA2, two magnetic fluxs constitute closed loops (Guan Bi magnetic flux).
In high frequency transformer of the present utility model, owing to having structure as described above, therefore as the conductive pattern of the wiring connecting the conductive pattern being formed at different substrate layers, the only conductive pattern 312 of the conductive pattern 313,314 and substrate layer S10 of substrate layer S1.The most each conductive pattern mostly as the first inducer or the second inducer generation effect, and contribute to the first inducer and the coupling of the second inducer.Therefore, it is suppressed that the reduction of the coefficient of coup that miniaturization causes and the reduction of Q-value, the high frequency transformer that the coefficient of coup is high is obtained.
Fig. 5 (A) is the circuit diagram possessing high frequency transformer 201 of the present embodiment as the antenna assembly 101 of antenna-matching circuit, and Fig. 5 (B) is its equivalent circuit diagram.
As shown in Fig. 5 (A), antenna assembly 101 includes: antenna element 11, and the high frequency transformer 201 being connected with this antenna element 11.Antenna element 11 in low-frequency band with fundamental mode resonance, at high frequency band with higher hamonic wave mode resonances.The feeder ear of this antenna element 11 connects high frequency transformer 201.First inducer L1 of high frequency transformer 201 is inserted between antenna element 11 and power supply circuits 30.Power supply circuits 30 are the power supply circuits for high-frequency signal supplies power to antenna element 11, generate and process high-frequency signal but it also may comprise and carry out high-frequency signal closing ripple or the circuit of partial wave.
High frequency transformer 201 is to make the first inducer L1 and the second inducer L2 via mutual inductance M closely-coupled transformer type circuit.As shown in Fig. 5 (B), this transformer type circuit energy equivalency transform is the T-shaped circuit that three inductance elements Z1, Z2, Z3 are constituted.That is, this T-shaped circuit by the first port P1 connecting power supply circuits 30, connects antenna element 11 the second port P2, connect the 3rd port P3 of ground connection, the inductance element Z1 being connected between the first port P1 and bifurcation point A, the inductance element Z2 being connected between the second port P2 and bifurcation point A and the 3rd inductance element Z3 that is connected between the 3rd port P3 and bifurcation point A and constitute.
The secohmmeter of the first inducer L1 illustrated by Fig. 5 (A) is shown as L1, the secohmmeter of the second inducer L2 is shown as L2, mutual inductance M and is expressed as M, then the inductance of the inductance element Z1 of Fig. 5 (B) is L1+M, the inductance of inductance element Z2 is-M, and the inductance of the 3rd inductance element Z3 is L2+M.
Transformation ratio determines according to inductance and the inductance of the second inducer L2 of the first inducer L1.As shown in Figure 2, connect by will be formed in side conductor pattern 121,122,123 part in parallel of substrate layer S4, S5, S6, opposite side conductive pattern 221,222,223 is connected in series, inductance and the inductance ratio deviation of the second inducer L2 of the first inducer L1 can be made, can thereby determine the transformation ratio of regulation.
" the second embodiment "
Fig. 6 is the plane graph of the conductive pattern that each substrate layer of the high frequency transformer 202 related at the second embodiment is formed.Compared with the structure of the high frequency transformer 201 shown in Fig. 2 in the first embodiment, not having substrate layer S5, the shape of conductive pattern 223 is different.Conductive pattern 121,123 is connected in series, and constitutes first coil conductive pattern L1b.Conductive pattern 221,223 is connected in series, and constitutes the second coil conductor pattern L2b.Other structure is identical with the situation of the first embodiment.
Like this, it is possible to only constituted first, second inducer by the conductive pattern being connected in series.
" the 3rd embodiment "
Fig. 7 is the circuit diagram of the high frequency transformer 203 that the 3rd embodiment relates to.Here, the pattern illustrated consider constitute the first inducer and the second inducer conductive pattern relation is set.It addition, be also shown for flowing through the electric current of conductive pattern towards, and by two coil aperture CA1, CA2 magnetic flux towards example.
In the same manner as the scheme shown in first, second embodiment, in this high frequency transformer 203, first inducer is connected between the first input/output port P1 (power supply terminal) and the second input/output port P2 (antenna terminal), and the second inducer is connected between the second input/output port P2 (antenna terminal) and the 3rd input/output port P3 (ground terminal).
First coil conductive pattern L1a, L1b, L1c, L1d and the second coil conductor pattern L2a, L2b, L2c, L2d respective coil wireline reel are towards the layer direction of multilamellar.Further, conductive pattern is arranged to respective coil aperture be divided into first coil open C A1 and the second coil aperture CA2 this at two (coil aperture).That is, the coil aperture of first coil conductive pattern L1a, L1c constitutes first coil open C A1, and the coil aperture of first coil conductive pattern L1b, L1d constitutes the second coil aperture CA2.It addition, the coil aperture of the second coil conductor pattern L2a, L2c constitutes the second coil aperture CA2, the second coil conductor pattern L2b, the coil aperture of L2d constitute first coil open C A1.
First coil conductive pattern L1a, L1b, L1c, L1d and the second coil conductor pattern L2a, L2b, L2c, L2d the most alternately stride across and connect at first coil open C A1 and the second coil aperture CA2 two.
Electric current turns between the first input/output port (power supply terminal) P1 and the 3rd input/output port (ground terminal) P3, utilize the magnetic flux that the first inducer L1 and the second inducer L2 produce in first coil open C A1 towards, and second coil aperture CA2 produce magnetic flux towards the most aligned, and the direction of the magnetic flux produced in first coil open C A1 and the direction opposite direction each other of magnetic flux that produces in the second coil aperture CA2, two magnetic fluxs constitute closed loops (Guan Bi magnetic flux).
As in this embodiment, the coil conductor pattern constituting the first inducer and the second inducer also can possess same number.
" the 4th embodiment "
Fig. 8 is the plane graph of the conductive pattern that each substrate layer of the high frequency transformer 204 related at the 4th embodiment is formed.Essentially identical with the structure shown in Fig. 2 in the first embodiment, but the size of two coil aperture (with reference to first coil open C A1 of Fig. 4, the second coil aperture CA2) is different.I.e., a part for first coil conductive pattern and a part for the second coil conductor pattern are formed on same substrate layer, but its forming range not left and right is impartial (chain double-dashed line in Fig. 8 is first coil open C A1 and the boundary line of the second coil aperture CA2).Utilize this structure, the inductance of the first inducer and the ratio deviation of the inductance of the second inducer can be made.
Especially, coil aperture is in the coil conductor pattern of first coil open C A1 side and coil conductor pattern that coil aperture is the second coil aperture CA2 side, one of them possess conductive pattern be connected in parallel portion in the case of, by making varying in size of first coil open C A1 and the second coil aperture CA2, transformation ratio can be effectively made to offset.Accordingly, it is capable to determine the transformation ratio of regulation in relative broad range.
" the 5th embodiment "
In 5th embodiment, represent and possess the antenna front ends module of the high frequency transformer illustrated so far and possess the communication terminal of this module.
Fig. 9 is the antenna of communication terminal and the circuit diagram of antenna front ends module being connected with this antenna.In Fig. 9, high frequency transformer 201 and match circuit 12 constitute antenna front ends module.High frequency transformer 201 is the high frequency transformer 201 shown in the first embodiment, but represents with the symbol of transformator merely in Fig. 9.The impedance of antenna for example, 5 Ω, utilizing high frequency transformer 201 is such as 30 Ω by its impedance transformation.Match circuit 12 is made up of the inducer L being connected in parallel and the C being connected in series, and this match circuit 11 is responsible for the transmission line of characteristic impedance 30 Ω and the impedance matching of the transmission line of 50 Ω.
Thus, the antenna front ends module being made up of high frequency transformer 201 and match circuit 12, the antenna element 11 of the impedance of as little as 5 Ω degree can be matched to the common transmission line of 50 Ω systems.
Like this, high frequency transformer of the present utility model can be used for the impedance inverter circuit of high frequency band (such as 100MHz～8GHz).
In the communication terminal that mobile terminal etc. are small-sized, along with the miniaturization of antenna, the impedance of antenna has to reduce, but by arranging described antenna front ends module in communication terminal, the coupling of high-frequency circuit and antenna can be obtained, Low emissivity, efficient antenna circuit can be constituted.
" the 6th embodiment "
Usually, if the hope baroque transformator of composition is with the wiring outside eliminating transformer, in order to obtain this structure, most cases needs bigger electrical length in conductive pattern.Due to this problem, make the transformator that making inductance is less extremely difficult.
Then, in the 6th embodiment, the high frequency transformer that inductance is less is particularly illustrated.
Figure 10 is the circuit diagram possessing high frequency transformer 206 that the 6th embodiment relates to as the antenna assembly 106 of antenna-matching circuit.
Power supply circuits are connected with first input port P1 of high frequency transformer 206, and antenna 11 is connected with the second input/output port, the 3rd input/output port P3 and grounding connection, constitute antenna assembly 106.
Parallel circuit is constituted by the first inducer L1 and the 3rd inducer L3.Similarly, the second inducer L2 and the 4th inducer L4 parallel circuit is constituted.
In high frequency transformer 206, between the first input/output port P1 and the second input/output port P2, connect the first inducer L1 and the parallel circuit of the 3rd inducer L3, between the second input/output port P2 and the 3rd input/output port P3, connect the second inducer L2 and the parallel circuit of the 4th inducer L4.
Figure 11 is the circuit diagram of high frequency transformer 206.Here, consider the relation that arranges of the conductive pattern constituting the first inducer L1, the second inducer L2, the 3rd inducer L3 and the 4th inducer L4, and extend description at direction of principal axis.In Figure 11, coil conductor pattern L1a, L1b is utilized to constitute the first inducer L1.It addition, utilize coil conductor pattern L3a, L3b to constitute the 3rd inducer L3.Similarly, utilize coil conductor pattern L2a, L2b to constitute the second inducer L2, utilize coil conductor pattern L4a, L4b to constitute the 4th inducer L4.
First coil open C A1 is the common coil aperture of coil conductor pattern L2b, L1a, L3a, L4b.It addition, the second coil aperture CA2 is the common coil aperture of coil conductor pattern L1b, L2a, L4a, L3b.
Utilize coil conductor pattern L1a, L1b, L2a, L2b to constitute the first transformator, utilize coil conductor pattern L3a, L3b, L4a, L4b to constitute the second transformator.These two transformators make coil aperture CA1, CA2 alignment and stacking.
Electric current turns between the first input/output port P1 and the 3rd input/output port P3, first coil open C A1 produce magnetic flux φ towards, and the magnetic flux φ produced in the second coil aperture CA2 towards the most aligned, and the direction of the magnetic flux φ produced in first coil open C A1 and the direction opposite direction each other of magnetic flux φ that produces in the second coil aperture CA2.Two magnetic fluxs constitute a closed loop (Guan Bi magnetic flux).
Figure 12 is the exploded perspective view of the high frequency transformer 206 that the 6th embodiment relates to.Figure 13 is the plane graph of the conductive pattern of each substrate layer formation at this high frequency transformer 206.High frequency transformer 206 is the duplexer of these substrate layers.Figure 12 omits the diagram of each substrate layer.The conductive pattern of each substrate layer is formed at the lower surface of substrate layer.The each several part of Figure 13 is the lower surface figure of each substrate layer.High frequency transformer 206 is constituted can be arranged on the form of the chip-shaped components and parts on the surface of printed wiring board etc..
In Figure 13, substrate layer S1 is orlop, and substrate layer S12 is the superiors.As shown in figure 13, multiple substrate layer S1～S12 form various conductive pattern.Such as form conductive pattern P1, P2, P3 at substrate layer S1.Conductive pattern L1b3 is formed at substrate layer S12.Interlayer connection conductor (via conductor) is formed at substrate layer S2～S12.It addition, the end face at duplexer forms the end electrode being connected with conductive pattern P1, P2, P3.
In Figure 13, point symbol and fork the magnetic flux φ shown in symbol table diagram 11 towards.
Following effect is played according to present embodiment.
(1) it is made up of the parallel circuit of multiple coils due to the first inducer and the second inducer, therefore can obtain desired low value.
(2) owing to arranging two coils at one layer, having two coil aperture faces, the most each coil is arranged in layer direction very close to, respective coil mutually with bigger coupling value coupling.
(3) owing to possessing multiple transformator (the first transformator and the second transformator), can obtain than the higher coupling of components and parts only possessing single transformator.
(4) it is determined by the distance between the first transformator shown in Figure 11 and the second transformator, the coefficient of coup of the transformator of regulation can be maintained and determine the inductance of transformator simultaneously.This action effect is as mentioned below.
The coefficient of coup be the most important thing is, the first inducer L1 and the distance of the second inducer L2, and the 3rd inducer L3 and the distance of the 4th inducer L4.Change these position relationships then coefficient of coup and produce bigger change.But, the first inducer L1 and the 3rd inducer L3 does not constitute transformator originally, and the second inducer L2 and the 4th inducer L4 does not the most constitute transformator.Thus, even if bigger deterioration occurs in the function that the distance relation changing the first transformator and the second transformator also will not make transformator.On the other hand, as shown in figure 11, due to through four coils of the magnetic line of force, the distance therefore making the first transformator and the second transformator is close, and the coefficient of coup of transformator can be made to increase further.The coefficient of coup that i.e. first transformator or the second transformator monomer have represents with K1, and coefficient of coup K2 during two transformer combinations is K2=K1+ α.Change the first transformator and the position relationship of the second transformator, then the value of α changes, but the coefficient of coup of entirety has the value of more than coefficient of coup K1 of monomer.Like this, the coefficient of coup of the transformator of regulation can be maintained, and utilize the distance of the first transformator and the second transformator to adjust the inductance of transformator.
Usually, the inductance that there are transformator reduces the then such relation of electromagnetic field couples reduction, but as shown in the embodiment, is arranged in parallel the transformator of bigger inductance, can be suppressed the deterioration of the coefficient of coup by shared flux.
" the 7th embodiment "
Figure 14 is the circuit diagram of the high frequency transformer 207 that the 7th embodiment relates to.Here, consider the relation that arranges of the conductive pattern constituting the first inducer L1 and the second inducer L2, and extend description at direction of principal axis.Compared with the high frequency transformer shown in Figure 11 in embodiment before, the structure of the second transformator is different.In example shown in Figure 14, constitute coil conductor pattern L3a of the second transformator, the winding number of L3b, L4a, L4b is less than and constitutes coil conductor pattern L1a of the first transformator, the winding number of L1b, L2a, L2b.That is, the inductance of each coil of the second transformator is less than the inductance of each coil of the first transformator.Like this, in the first transformator and the second transformator, the inductance of the coil constituting these transformators also can be unequal.Thus, the inductance of transformator and the inching of the coefficient of coup can be carried out.
In Figure 10～14, a parallel circuit is constituted by two inducers L1, L3, a parallel circuit is constituted by two inducers L2, L4, but such as shown in the high frequency transformer shown in Figure 15, may be constructed parallel circuit and the parallel circuit of three inducers L2, L4, L6 of three inducers L1, L3, L5, it is also possible to constitute the parallel circuit of the inducer of more than three.
" other embodiment "
Above, based on specific embodiment, this utility model is illustrated, but this utility model is not limited to described embodiment.
Such as, each coil conductor pattern constituting the first inducer and the second inducer need not be provided entirely in the inside of duplexer, it is possible to a part is arranged on the surface of duplexer.
It addition, each coil conductor pattern is in addition to the multilayer coil pattern of multiple circle coils that have been stackings, it is possible to form the coil conductor pattern of multiturn at monolayer, or form the coil conductor pattern of multiturn at each layer of multilamellar.
Label declaration
A bifurcation point
CA1 first coil opening
CA2 the second coil aperture
L1 the first inducer
L1a, L1b, L1c, L1d first coil conductive pattern
L2 the second inducer
L2a, L2b, L2c, L2d second coil conductor pattern
L3a, L3b, L4a, L4b coil conductor pattern
M mutual inductance
P1 the first input/output port (or its conductive pattern)
P2 the second input/output port (or its conductive pattern)
P3 the 3rd input/output port (or its conductive pattern)
S1～S10 substrate layer
Z1, Z2, Z3 inductance element
11 antenna elements
12 match circuits
30 power supply circuits
101,106 antenna assembly
111 conductive patterns
121,122,123 conductive pattern
131,132 conductive pattern
141 conductive patterns
201～207 high frequency transformers
211,212 conductive pattern
221,222,223 conductive pattern
231,232,233 conductive pattern
312,313,314 conductive pattern.
Claims (17)
1. a high frequency transformer, it is characterised in that including:
First inducer, this first inducer is connected between the first input/output port and the second input/output port；And second inducer, this second inducer is connected between the second input/output port and the 3rd input/output port, the first inducer and the coupling of the second inducer phase mutual magnetic field,
First inducer and the second inducer are made up of the conductive pattern formed in multilamellar,
The conductive pattern of the first inducer and the conductive pattern of the second inducer are arranged to, respective coil wireline reel towards the layer direction of described multilamellar, respective coil aperture be divided into first coil opening and the second coil aperture this at two,
The conductive pattern of the first inducer and the conductive pattern of the second inducer the most alternately stride across at described first coil opening and described second coil aperture two and connect,
First input/output port and the 3rd input/output port are arranged on the first side of the stacked direction of described multilamellar, and the second input/output port is arranged on the second side,
Electric current turns between described first input/output port and described 3rd input/output port, utilize the magnetic flux that the first inducer and the second inducer produce at first coil opening towards, and the magnetic flux produced in the second coil aperture towards the most aligned, and the direction of the magnetic flux produced at first coil opening and the direction opposite direction each other of magnetic flux that produces in the second coil aperture.
2. a high frequency transformer, it is characterised in that including:
First transformator, this first transformator includes: the first inducer, and this first inducer is connected between the first input/output port and the second input/output port；And second inducer, this second inducer is connected between the second input/output port and the 3rd input/output port, the first inducer and the coupling of the second inducer phase mutual magnetic field,
And second transformator, this second transformator includes: the 3rd inducer, and the 3rd inducer is connected between the first input/output port and the second input/output port；And the 4th inducer, the 4th inducer is connected between the second input/output port and the 3rd input/output port, the 3rd inducer and the coupling of the 4th inducer phase mutual magnetic field,
First inducer, the second inducer, the 3rd inducer and the 4th inducer are made up of the conductive pattern formed in multilamellar,
The conductive pattern of the first inducer and the conductive pattern of the second inducer are arranged to, respective coil wireline reel towards the layer direction of described multilamellar, respective coil aperture be divided into first coil opening and the second coil aperture this at two,
The conductive pattern of the 3rd inducer and the conductive pattern of the 4th inducer are arranged to, respective coil wireline reel towards the layer direction of described multilamellar, respective coil aperture be divided into described first coil opening and described second coil aperture this at two,
The conductive pattern of the first inducer and the conductive pattern of the second inducer the most alternately stride across at described first coil opening and described second coil aperture two and connect,
The conductive pattern of the 3rd inducer and the conductive pattern of the 4th inducer stride across the most alternately at described first coil opening and described second coil aperture two and connect,
Electric current turns between described first input/output port and described 3rd input/output port, first coil opening produce magnetic flux towards and second coil aperture produce magnetic flux towards the most aligned, and the direction of the magnetic flux produced at first coil opening and the direction opposite direction each other of magnetic flux that produces in the second coil aperture
First inducer and the 3rd inducer are connected in parallel, and the second inducer and the 4th inducer are connected in parallel.
3. high frequency transformer as claimed in claim 2, it is characterised in that
A part for the conductive pattern of described 3rd inducer or the conductive pattern of described 4th inducer is parallel circuit.
4. high frequency transformer as claimed in claim 2, it is characterised in that
Described first input/output port and described 3rd input/output port are arranged on the both ends of the stacked direction of described multilamellar, and described second input/output port is arranged on the central part of described stacked direction.
5. the high frequency transformer as according to any one of Claims 1 to 4, it is characterised in that
A part for the conductive pattern of described first inducer or the conductive pattern of described second inducer is parallel circuit.
6. the high frequency transformer as according to any one of Claims 1 to 4, it is characterised in that
Described first coil opening and described second coil aperture differ in size from one another.
7. high frequency components and parts, it is characterised in that
It is the high frequency components and parts possessing high frequency transformer,
Described high frequency transformer is the high frequency transformer according to any one of claim 1～6.
8. a communication terminal, it is characterised in that
It is the communication terminal possessing high frequency transformer in the transport part of signal of communication,
Described high frequency transformer is the high frequency transformer according to any one of claim 1～6.
9. a high frequency transformer, it is characterised in that including:
One inducer, this inducer is connected between the first input/output port and the second input/output port；And another inducer, this another inducer is connected between the second input/output port and the 3rd input/output port, one inducer and another inducer phase mutual magnetic field described coupling,
One inducer has first coil conductive pattern and tertiary coil conductive pattern,
Another inducer described has the second coil conductor pattern and the 4th coil conductor pattern,
Described first coil conductive pattern and described tertiary coil conductive pattern are sandwiched by described second coil conductor pattern and described 4th coil conductor pattern.
10. high frequency transformer as claimed in claim 9, it is characterised in that
Described first coil conductive pattern, described second coil conductor pattern, described tertiary coil conductive pattern and described 4th coil conductor pattern each have identical coil wireline reel.
11. high frequency transformers as claimed in claim 9, it is characterised in that
Described first coil conductive pattern and described tertiary coil conductive pattern are connected in parallel with each other, and described second coil conductor pattern and described 4th coil conductor pattern are connected in parallel with each other.
12. high frequency transformers as claimed in claim 9, it is characterised in that
Constituted the first transformator by described first coil conductive pattern and described second coil conductor pattern, described tertiary coil conductive pattern and described 4th coil conductor pattern constitute the second transformator.
13. high frequency transformers as claimed in claim 9, it is characterised in that
Described tertiary coil conductive pattern has the inductance different from described first coil conductive pattern.
14. high frequency transformers as claimed in claim 13, it is characterised in that
Described 4th coil conductor pattern has the inductance different from described second coil conductor pattern.
15. high frequency transformers as according to any one of claim 9～14, it is characterized in that, described first coil conductive pattern, described second coil conductor pattern, described tertiary coil conductive pattern and described 4th coil conductor pattern are built in the duplexer being laminated by multiple substrate layers.
16. 1 kinds of high frequency components and parts, it is characterised in that
It is the high frequency components and parts possessing high frequency transformer,
Described high frequency transformer is the high frequency transformer according to any one of claim 9～15.
17. 1 kinds of communication terminals, it is characterised in that
It is the communication terminal possessing high frequency transformer in the transport part of signal of communication,
Described high frequency transformer is the high frequency transformer according to any one of claim 9～15.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013109316 | 2013-05-23 | ||
| JP2013-109316 | 2013-05-23 | ||
| JP2013181297 | 2013-09-02 | ||
| JP2013-181297 | 2013-09-02 | ||
| PCT/JP2014/052027 WO2014188739A1 (en) | 2013-05-23 | 2014-01-30 | High-frequency transformer, high-frequency component and communication terminal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205666116U true CN205666116U (en) | 2016-10-26 |
Family
ID=51933306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201490000748.5U Expired - Lifetime CN205666116U (en) | 2013-05-23 | 2014-01-30 | High -frequency transformer , high frequency components and parts and communication terminal device |
Country Status (3)
| Country | Link |
|---|---|
| JP (2) | JP5700176B1 (en) |
| CN (1) | CN205666116U (en) |
| WO (1) | WO2014188739A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653318A (en) * | 2017-02-28 | 2017-05-10 | 华为技术有限公司 | Inductive device and interleaved parallel direct current converter |
| CN110233029A (en) * | 2019-06-18 | 2019-09-13 | 电子科技大学 | A kind of big sensibility reciprocal laminated chip inductor and its design method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107210504B (en) * | 2015-02-23 | 2020-07-07 | 株式会社村田制作所 | Inductance element, high-frequency transformer element, impedance conversion element, and antenna device |
| WO2016157928A1 (en) * | 2015-03-27 | 2016-10-06 | 株式会社村田製作所 | Electronic component |
| JP6624026B2 (en) * | 2016-05-20 | 2019-12-25 | 株式会社村田製作所 | Laminated electronic components |
| JP6388096B2 (en) | 2016-07-15 | 2018-09-12 | 株式会社村田製作所 | High frequency transformer and phase shifter |
| JP7428098B2 (en) * | 2020-07-31 | 2024-02-06 | Tdk株式会社 | Inductor parts and DC/DC converters using the same |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03183106A (en) * | 1989-12-12 | 1991-08-09 | Sanken Electric Co Ltd | Printed wiring board |
| JP2949244B2 (en) * | 1990-11-30 | 1999-09-13 | 株式会社村田製作所 | Multilayer transformer |
| JP3057203B2 (en) * | 1993-04-19 | 2000-06-26 | 横河電機株式会社 | Print coil type transformer |
| JP3681239B2 (en) * | 1996-11-15 | 2005-08-10 | 横河電機株式会社 | Printed coil transformer and switching power supply |
| JP3484971B2 (en) * | 1998-03-19 | 2004-01-06 | 松下電器産業株式会社 | Common mode choke coil |
| US8325001B2 (en) * | 2005-08-04 | 2012-12-04 | The Regents Of The University Of California | Interleaved three-dimensional on-chip differential inductors and transformers |
| JP4827087B2 (en) * | 2006-04-11 | 2011-11-30 | Ｆｄｋ株式会社 | Multilayer inductor |
| JP2008177486A (en) * | 2007-01-22 | 2008-07-31 | Matsushita Electric Works Ltd | Transformer |
| JP4674590B2 (en) * | 2007-02-15 | 2011-04-20 | ソニー株式会社 | Balun transformer, balun transformer mounting structure, and electronic device incorporating the mounting structure |
| JP2008205216A (en) * | 2007-02-20 | 2008-09-04 | Seiko Epson Corp | Laminated coil unit and electronic apparatus having the same, and charger |
| KR101244902B1 (en) * | 2010-01-19 | 2013-03-18 | 가부시키가이샤 무라타 세이사쿠쇼 | Antenna device and communication terminal apparatus |
| JP5429409B2 (en) * | 2011-01-20 | 2014-02-26 | 株式会社村田製作所 | Frequency stabilization circuit, antenna device, and communication terminal device |
| JP2012195332A (en) * | 2011-03-15 | 2012-10-11 | Panasonic Corp | Common mode noise filter |
| WO2012144360A1 (en) * | 2011-04-20 | 2012-10-26 | 株式会社村田製作所 | High frequency transformer, high frequency components and communication terminal apparatus |
| JP5672416B2 (en) * | 2012-09-28 | 2015-02-18 | 株式会社村田製作所 | Design method of impedance conversion circuit |
-
2014
- 2014-01-30 CN CN201490000748.5U patent/CN205666116U/en not_active Expired - Lifetime
- 2014-01-30 JP JP2014534858A patent/JP5700176B1/en active Active
- 2014-01-30 WO PCT/JP2014/052027 patent/WO2014188739A1/en active Application Filing
-
2015
- 2015-02-19 JP JP2015030339A patent/JP6160638B2/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653318A (en) * | 2017-02-28 | 2017-05-10 | 华为技术有限公司 | Inductive device and interleaved parallel direct current converter |
| CN106653318B (en) * | 2017-02-28 | 2019-06-18 | 华为技术有限公司 | Inductance component and crisscross parallel DC converter |
| CN110233029A (en) * | 2019-06-18 | 2019-09-13 | 电子科技大学 | A kind of big sensibility reciprocal laminated chip inductor and its design method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015122535A (en) | 2015-07-02 |
| JP5700176B1 (en) | 2015-04-15 |
| JP6160638B2 (en) | 2017-07-12 |
| WO2014188739A1 (en) | 2014-11-27 |
| JPWO2014188739A1 (en) | 2017-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205666116U (en) | High -frequency transformer , high frequency components and parts and communication terminal device | |
| JP4962629B2 (en) | High frequency transformer, electronic circuit and electronic equipment | |
| JP5505561B2 (en) | Coupling degree adjusting circuit, antenna device, and communication terminal device | |
| CN104685713B (en) | Impedance inverter circuit and radio communication device | |
| JP4761009B1 (en) | Frequency stabilization circuit, antenna device, and communication terminal device | |
| JP5459301B2 (en) | High frequency transformer, high frequency component and communication terminal device | |
| US8183966B2 (en) | Entirely integrated EMI filter based on a flexible multi-layer strip material | |
| US9698831B2 (en) | Transformer and communication terminal device | |
| US9698747B2 (en) | Impedance conversion circuit and antenna device | |
| US9893708B2 (en) | Impedance conversion ratio setting method, impedance conversion circuit, and communication terminal apparatus | |
| US20190260343A1 (en) | Lc filter | |
| CN205092107U (en) | Cascade type coil components and parts and matching circuit | |
| US9627738B2 (en) | Wideband multilayer transmission line transformer | |
| JP2023529627A (en) | 3dB quadrature hybrid coupler, high frequency front end module and communication terminal | |
| CN207818307U (en) | Coil component | |
| JP6195033B2 (en) | Impedance conversion element and communication device | |
| JP2012182286A (en) | Coil component | |
| JPWO2011086822A1 (en) | Common mode filter and inductor for common mode filter | |
| JP3766262B2 (en) | Balun transformer | |
| JPWO2016072403A1 (en) | Flexible cable connection structure to printed circuit board | |
| US9729123B2 (en) | Common-mode filter | |
| Nishizawa et al. | Enhancing the quality factor of thin film printed coils for efficient wireless power transfer | |
| CN219577026U (en) | Laminated balun suitable for ultrahigh frequency band | |
| US20220285081A1 (en) | Radio frequency auto-transformer, radio frequency device and method of construction of an auto-transformer | |
| JPWO2023276879A5 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20161026 |