JP6160638B2 - High frequency transformer, high frequency component and communication terminal device - Google Patents

Description

  The present invention relates to a high-frequency transformer in which inductors are coupled with a high degree of coupling, a high-frequency component including the same, and a communication terminal device.

  With the downsizing / thinning of electronic devices and power supply devices, the built-in transformer is also being downsized / thinned. As one of the measures for coping with the deterioration of the coupling coefficient accompanying downsizing, as in Patent Document 1 and Patent Document 2, the primary side coil and the secondary side coil are formed over a plurality of layers, and one coil It is effective to make a laminated structure (sandwich structure) that sandwiches between the two coils.

Japanese Patent No. 3057203 Japanese Patent No. 3063417

  However, in the above sandwich structure, the following problems occur when the transformer is further downsized.

  In order to adopt the sandwiching structure, wiring for connecting the primary side coils or the secondary side coils is necessary. However, as the transformer is miniaturized, the proportion of the wiring increases. Since this wiring does not contribute to the coupling between the primary side coil and the secondary side coil at all, the presence of the wiring deteriorates the coupling coefficient between the primary side coil and the secondary side coil. Therefore, the smaller the transformer, the smaller the effect of taking the sandwich structure.

  In developing a small transformer, the existence of the wiring becomes a very big bottleneck. In other words, the via and the coil conductor pattern need to maintain a predetermined distance so as not to contact the via which is the interlayer connection conductor and the coil conductor pattern. For this purpose, it is necessary to reduce the size of the coil. By reducing the size of the coil, the inductance per layer is reduced, the number of stacked layers needs to be increased, and an additional wiring layer is required. As a result, not only the coupling coefficient deteriorates, but also the Q value of the coil deteriorates.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a high-frequency transformer, a high-frequency component including the high-frequency transformer, and a communication terminal device that can suppress a decrease in coupling coefficient and a decrease in Q value due to downsizing.

The high-frequency transformer of the present invention is
A first inductor connected between the first input / output port and the second input / output port; and a second inductor connected between the second input / output port and the third input / output port. In the high frequency transformer in which the inductor and the second inductor are magnetically coupled to each other,
The first inductor has a first coil conductor pattern and a third coil conductor pattern,
The second inductor has a second coil conductor pattern and a fourth coil conductor pattern,
The first coil conductor pattern and the third coil conductor pattern are sandwiched between the second coil conductor pattern and the fourth coil conductor pattern;
It is characterized by that.

The high frequency component of the present invention includes a high frequency transformer,
The high-frequency transformer has the above-described configuration.

The communication terminal device of the present invention comprises a high-frequency transformer in the communication signal transmission unit,
The high-frequency transformer has the above-described configuration.

  According to the present invention, the predetermined coupling coefficient is determined by determining the distance between the transformer formed by the first coil conductor pattern and the second coil conductor pattern and the transformer formed by the third coil conductor pattern and the fourth coil conductor pattern. In addition, a high-frequency transformer of inductance is configured, and a high-frequency component and a communication terminal device including the same can be realized.

FIG. 1 is an exploded perspective view of the high-frequency transformer according to the first embodiment. FIG. 2 is a plan view of a conductor pattern formed on each base material layer of the high-frequency transformer according to the first embodiment. FIG. 3 is a circuit diagram of the high-frequency transformer according to the first embodiment. 4A is a plan view of the high-frequency transformer according to the first embodiment, and FIG. 4B is a longitudinal sectional view showing the direction of magnetic flux passing through two coil openings of the high-frequency transformer. FIG. 5A is a circuit diagram of an antenna device 101 including the high-frequency transformer according to the first embodiment as an antenna matching circuit, and FIG. 5B is an equivalent circuit diagram thereof. FIG. 6 is a plan view of a conductor pattern formed on each base material layer of the high-frequency transformer according to the second embodiment. FIG. 7 is a circuit diagram of a high-frequency transformer according to the third embodiment. FIG. 8 is a plan view of a conductor pattern formed on each base material layer of the high-frequency transformer according to the fourth embodiment. FIG. 9 is a circuit diagram of an antenna of a communication terminal apparatus according to the fifth embodiment and an antenna front end module connected to the antenna. FIG. 10 is a circuit diagram of an antenna device 106 including the high-frequency transformer 206 according to the sixth embodiment as an antenna matching circuit. FIG. 11 is a circuit diagram of the high-frequency transformer 206 according to the sixth embodiment. FIG. 12 is an exploded perspective view of the high-frequency transformer 206 according to the sixth embodiment. FIG. 13 is a plan view of a conductor pattern formed on each base material layer of the high-frequency transformer 206 according to the sixth embodiment. FIG. 14 is a circuit diagram of a high-frequency transformer according to the seventh embodiment. FIG. 15 is a circuit diagram of a high-frequency transformer including a parallel circuit of three inductors.

  Hereinafter, some specific examples will be given to describe embodiments for carrying out the present invention. Each embodiment is an exemplification, and it is needless to say that still other embodiments can be obtained by partial replacement or combination of configurations shown in different embodiments.

<< First Embodiment >>
FIG. 1 is an exploded perspective view of a high-frequency transformer 201 according to the first embodiment. FIG. 2 is a plan view of a conductor pattern formed on each base material layer of the high-frequency transformer 201. In FIG. 1, illustration of each base material layer is omitted.

  A high-frequency transformer 201 according to the first embodiment is a transformer used for an impedance matching circuit or the like in a high-frequency circuit in a communication terminal device or the like, and is configured as a chip-type component that can be mounted on the surface of a printed wiring board or the like. .

  In the high-frequency transformer 201, a first inductor is connected between a first input / output port P1 (feed terminal) and a second input / output port P2 (antenna terminal), and a second input / output port P2 (antenna terminal). And the third input / output port P3 (ground terminal).

  As shown in FIG. 2, various conductor patterns are formed on the plurality of base material layers S1 to S10. Conductive patterns 313 and 314 are formed on the base material layer S1. Conductive pattern 211 for base layer S2, conductive patterns 111 and 212 for base layer S3, conductive patterns 122 and 221 for base layer S4, conductive patterns 122 and 222 for base layer S5, base layer S6 , Conductor patterns 131 and 231 are formed on the substrate layer S7, conductor patterns 132 and 232 are formed on the substrate layer S8, and conductor patterns 141 and 233 are formed on the substrate layer S9. A conductive pattern 312 is formed on the base material layer S10.

  The lowermost part of FIG. 2 represents the lower surface of the base material layer S1. Conductor patterns P1, P2, and P3 are formed on the lower surface of the base material layer S1. Interlayer connection conductors (via conductors) are formed between the respective layers. Further, on the end face of the laminate, an end face electrode connecting between the conductor pattern 312 and the conductor pattern P2, an end face electrode connecting between the conductor pattern 313 and the conductor pattern P3, and an end face connecting between the conductor pattern 314 and the conductor pattern P1 are provided. Each electrode is formed.

  The conductor pattern 111 constitutes the first coil conductor pattern L1a. The conductor patterns 121 and 122 are connected in parallel. A conductor pattern 123 is connected in series to this parallel circuit. These conductor patterns 121, 122, and 123 constitute a first coil conductor pattern L1b. The conductor patterns 131 and 132 are connected in series to form a first coil conductor pattern L1c. The conductor pattern 141 constitutes the first coil conductor pattern L1d. The conductor patterns 211 and 212 are connected in series to form the second coil conductor pattern L2a. The conductor patterns 221, 222, and 223 are connected in series to form a second coil conductor pattern L2b. The conductor patterns 231, 232, and 233 are connected in series to form the second coil conductor pattern L2c.

  The first coil conductor patterns L1a, L1b, L1c, and L1d constitute a first inductor (L1), and the second coil conductor patterns L2a, L2b, and L2c constitute a second inductor (L2).

  As shown in FIG. 1, the coil winding axes of the first coil conductor patterns L1a, L1b, L1c, L1d and the second coil conductor patterns L2a, L2b, L2c are respectively oriented in the layer direction of a plurality of layers. And the conductor pattern is arrange | positioned so that each coil opening may be divided into two places (coil opening) of 1st coil opening CA1 and 2nd coil opening CA2. That is, the coil openings of the first coil conductor patterns L1a and L1c constitute a first coil opening CA1, and the coil openings of the first coil conductor patterns L1b and L1d constitute a second coil opening CA2. The coil openings of the second coil conductor patterns L2a and L2c constitute a second coil opening CA2, and the coil openings of the second coil conductor pattern L2b constitute a first coil opening CA1.

  The first coil conductor patterns L1a, L1b, L1c, and L1d and the second coil conductor patterns L2a, L2b, and L2c are alternately connected at two locations of the first coil opening CA1 and the second coil opening CA2.

  The first input / output port P1 and the third input / output port P3 are disposed on the first end side (bottom surface side) in the stacking direction of the plurality of base material layers, and the second input / output port P2 is the second end side (top surface side). ).

  FIG. 3 is a circuit diagram of the high-frequency transformer 201 according to this embodiment. Here, the arrangement is shown in consideration of the arrangement relationship of the conductor patterns constituting the first inductor and the second inductor. 4A is a plan view of the high-frequency transformer 201, and FIG. 4B is a longitudinal sectional view showing the direction of magnetic flux passing through two coil openings of the high-frequency transformer 201. FIG.

  As apparent from FIGS. 3 and 4, the first inductor L1 and the second inductor L2 open the first coil in a state where a current is passed between the first input / output port P1 and the third input / output port P3. The direction of the magnetic flux generated in CA1 and the direction of the magnetic flux generated in the second coil opening CA2 are aligned, and the direction of the magnetic flux generated in the first coil opening CA1 and the direction of the magnetic flux generated in the second coil opening CA2 are opposite to each other. Both magnetic fluxes constitute one closed loop (closed magnetic circuit).

  Since the high-frequency transformer of the present invention has the above-described structure, the conductor pattern as a wiring connecting conductor patterns formed on different base material layers is the conductor patterns 313, 314 of the base material layer S1 and Only the conductor pattern 312 of the base material layer S10 is provided. That is, most of each conductor pattern acts as the first inductor or the second inductor and contributes to the coupling between the first inductor and the second inductor. Therefore, a reduction in coupling coefficient and a reduction in Q value due to miniaturization can be suppressed, and a high-frequency transformer with a high coupling coefficient can be obtained.

  FIG. 5A is a circuit diagram of an antenna device 101 provided with the high-frequency transformer 201 according to this embodiment as an antenna matching circuit, and FIG. 5B is an equivalent circuit diagram thereof.

  As shown in FIG. 5A, the antenna device 101 includes an antenna element 11 and a high-frequency transformer 201 connected to the antenna element 11. The antenna element 11 resonates in the fundamental mode in LowBand and resonates in the harmonic mode in HighBand. A high-frequency transformer 201 is connected to the feeding end of the antenna element 11. The first inductor L1 of the high-frequency transformer 201 is inserted between the antenna element 11 and the power feeding circuit 30. The power feeding circuit 30 is a power feeding circuit for feeding a high frequency signal to the antenna element 11 and generates and processes a high frequency signal, but may include a circuit that combines and demultiplexes the high frequency signal.

  The high-frequency transformer 201 is a transformer circuit in which a first inductor L1 and a second inductor L2 are tightly coupled via a mutual inductance M. As shown in FIG. 5B, this transformer type circuit can be equivalently converted into a T type circuit including three inductance elements Z1, Z2, and Z3. That is, the T-type circuit includes a first port P1 connected to the power feeding circuit 30, a second port P2 connected to the antenna element 11, a third port P3 connected to the ground, a first port P1, and a branch point A. Inductance element Z1 connected between the second port P2 and the branch point A, and third inductance element connected between the third port P3 and the branch point A. It is composed of Z3.

  When the inductance of the first inductor L1 shown in FIG. 5A is L1, the inductance of the second inductor L2 is L2, and the mutual inductance is M, the inductance of the inductance element Z1 of FIG. The inductance of Z2 is -M, and the inductance of the third inductance element Z3 is L2 + M.

  The transformer ratio is determined by the inductance of the first inductor L1 and the inductance of the second inductor L2. As shown in FIG. 2, one conductor pattern 121, 122, 123 formed on the base material layers S4, S5, S6 is partially connected in parallel, and the other conductor pattern 221, 222, 223 is connected in series. Thus, the ratio of the inductance of the first inductor L1 and the inductance of the second inductor L2 can be shifted, and thus the predetermined transformer ratio can be determined.

<< Second Embodiment >>
FIG. 6 is a plan view of a conductor pattern formed on each base material layer of the high-frequency transformer 202 according to the second embodiment. Compared with the structure of the high-frequency transformer 201 shown in FIG. 2 in the first embodiment, there is no base material layer S5 and the shape of the conductor pattern 223 is different. The conductor patterns 121 and 123 are connected in series to form the first coil conductor pattern L1b. The conductor patterns 221 and 223 are connected in series to form a second coil conductor pattern L2b. Other configurations are the same as those in the first embodiment.

  Thus, you may comprise a 1st, 2nd inductor only with the conductor pattern connected in series.

<< Third Embodiment >>
FIG. 7 is a circuit diagram of the high-frequency transformer 203 according to the third embodiment. Here, the arrangement is shown in consideration of the arrangement relationship of the conductor patterns constituting the first inductor and the second inductor. Further, an example of the direction of the current flowing through the conductor pattern and the direction of the magnetic flux passing through the two coil openings CA1 and CA2 is also shown.

  Similar to those shown in the first and second embodiments, the high-frequency transformer 203 includes a first inductor between the first input / output port P1 (feeding terminal) and the second input / output port P2 (antenna terminal). Are connected, and a second inductor is connected between the second input / output port P2 (antenna terminal) and the third input / output port P3 (ground terminal).

  The first coil conductor patterns L1a, L1b, L1c, and L1d and the second coil conductor patterns L2a, L2b, L2c, and L2d each have a coil winding axis in the layer direction of the plurality of layers. And the conductor pattern is arrange | positioned so that each coil opening may be divided into two places (coil opening) of 1st coil opening CA1 and 2nd coil opening CA2. That is, the coil openings of the first coil conductor patterns L1a and L1c constitute a first coil opening CA1, and the coil openings of the first coil conductor patterns L1b and L1d constitute a second coil opening CA2. The coil openings of the second coil conductor patterns L2a and L2c constitute a second coil opening CA2, and the coil openings of the second coil conductor patterns L2b and L2d constitute a first coil opening CA1.

  The first coil conductor patterns L1a, L1b, L1c, L1d and the second coil conductor patterns L2a, L2b, L2c, L2d are connected to each other at two locations of the first coil opening CA1 and the second coil opening CA2 alternately. .

  The current is generated between the first input / output port (power supply terminal) P1 and the third input / output port (ground terminal) P3, and is generated in the first coil opening CA1 by the first inductor L1 and the second inductor L2. The direction of the magnetic flux and the direction of the magnetic flux generated in the second coil opening CA2 are aligned, and the direction of the magnetic flux generated in the first coil opening CA1 and the direction of the magnetic flux generated in the second coil opening CA2 are opposite to each other. Both magnetic fluxes constitute one closed loop (closed magnetic circuit).

  As in the present embodiment, the same number of coil conductor patterns constituting the first inductor and the second inductor may be provided.

<< Fourth Embodiment >>
FIG. 8 is a plan view of a conductor pattern formed on each base material layer of the high-frequency transformer 204 according to the fourth embodiment. Although it is basically the same as the structure shown in FIG. 2 in the first embodiment, the sizes of the two coil openings (see the first coil opening CA1 and the second coil opening CA2 in FIG. 4) are different. That is, a part of the first coil conductor pattern and a part of the second coil conductor pattern are formed on the same base material layer, but their formation ranges are not equal left and right (two-dot chain line in FIG. 8). Is a boundary line between the first coil opening CA1 and the second coil opening CA2. With this configuration, the ratio of the inductance of the first inductor and the inductance of the second inductor can be shifted.

  In particular, when one of the coil conductor pattern in which the coil opening is on the first coil opening CA1 side and the coil conductor pattern in which the coil opening is on the second coil opening CA2 side is provided with a parallel connection portion of the conductor pattern, By changing the sizes of the first coil opening CA1 and the second coil opening CA2, the transformer ratio can be effectively shifted. Therefore, the predetermined transformer ratio can be determined over a wide range.

<< Fifth Embodiment >>
In the fifth embodiment, an antenna front-end module including the high-frequency transformer described so far and a communication terminal device including the antenna front-end module will be described.

  FIG. 9 is a circuit diagram of an antenna of a communication terminal device and an antenna front end module connected to the antenna. In FIG. 9, the high frequency transformer 201 and the matching circuit 12 constitute an antenna front end module. The high-frequency transformer 201 is the high-frequency transformer 201 shown in the first embodiment, but is represented by a simple transformer symbol in FIG. The impedance of the antenna is 5Ω, for example, and the impedance is converted to 30Ω by the high frequency transformer 201, for example. The matching circuit 12 includes a shunt-connected inductor L and a series-connected C, and the matching circuit 11 performs impedance matching between a transmission line having a characteristic impedance of 30Ω and a transmission line having a 50Ω characteristic.

  Therefore, the antenna front-end module including the high-frequency transformer 201 and the matching circuit 12 can match the antenna element 11 having a low impedance of about 5Ω to a normal 50Ω transmission line.

  Thus, the high frequency transformer of the present invention can be used for an impedance conversion circuit in a high frequency band (for example, 100 MHz to 8 GHz).

  In a small communication terminal device such as a portable terminal, the impedance of the antenna is inevitably lowered as the antenna is downsized. However, by providing the antenna front end module in the communication terminal device, the high frequency circuit and the antenna Thus, a highly efficient antenna circuit with low reflection can be configured.

<< Sixth Embodiment >>
In general, when a transformer having a complicated structure that eliminates wiring outside the transformer is to be configured, a large electrical length is often required for the conductor pattern in order to obtain the configuration. Because of this problem, it is very difficult to make a transformer with a small inductance.

  Therefore, the sixth embodiment shows a high-frequency transformer having a particularly small inductance.

  FIG. 10 is a circuit diagram of an antenna device 106 including the high-frequency transformer 206 according to the sixth embodiment as an antenna matching circuit.

  A power feeding circuit is connected to the first input port P1 of the high-frequency transformer 206, the antenna 11 is connected to the second input / output port, and the third input / output port P3 is connected to the ground to constitute the antenna device 106.

  The first inductor L1 and the third inductor L3 constitute a parallel circuit. Similarly, the second inductor L2 and the fourth inductor L4 form a parallel circuit.

  In the high-frequency transformer 206, a parallel circuit of a first inductor L1 and a third inductor L3 is connected between the first input / output port P1 and the second input / output port P2, and the second input / output port P2 and the third input / output port P2 are connected to each other. A parallel circuit of the second inductor L2 and the fourth inductor L4 is connected between the input / output port P3.

  FIG. 11 is a circuit diagram of the high-frequency transformer 206. Here, in consideration of the arrangement relationship of the conductor patterns constituting the first inductor L1, the second inductor L2, the third inductor L3, and the fourth inductor L4, they are drawn in the axial direction. In FIG. 11, the first inductor L1 is configured by the coil conductor patterns L1a and L1b. Further, the third inductor L3 is configured by the coil conductor patterns L3a and L3b. Similarly, the second inductor L2 is configured by the coil conductor patterns L2a and L2b, and the fourth inductor L4 is configured by the coil conductor patterns L4a and L4b.

  The first coil opening CA1 is a common coil opening for the coil conductor patterns L2b, L1a, L3a, and L4b. The second coil opening CA2 is a common coil opening for the coil conductor patterns L1b, L2a, L4a, and L3b.

  The coil transformer patterns L1a, L1b, L2a, and L2b constitute a first transformer, and the coil conductor patterns L3a, L3b, L4a, and L4b constitute a second transformer. These two transformers are laminated with the coil openings CA1 and CA2 aligned.

  The direction of the magnetic flux φ generated in the first coil opening CA1 and the direction of the magnetic flux φ generated in the second coil opening CA2 in a state where a current is passed between the first input / output port P1 and the third input / output port P3. The direction of the magnetic flux φ generated in the first coil opening CA1 and the direction of the magnetic flux φ generated in the second coil opening CA2 are opposite to each other. Both magnetic fluxes constitute one closed loop (closed magnetic circuit).

  FIG. 12 is an exploded perspective view of the high-frequency transformer 206 according to the sixth embodiment. FIG. 13 is a plan view of a conductor pattern formed on each base material layer of the high-frequency transformer 206. The high-frequency transformer 206 is a laminate of these base material layers. In FIG. 12, illustration of each base material layer is omitted. The conductor pattern of each base material layer is formed on the lower surface of the base material layer. Each part of FIG. 13 is a bottom view of each base material layer. The high-frequency transformer 206 is configured as a chip-type component that can be mounted on the surface of a printed wiring board or the like.

  In FIG. 13, the base material layer S1 is the bottom layer, and the base material layer S12 is the top layer. As shown in FIG. 13, various conductor patterns are formed on the plurality of base material layers S1 to S12. For example, conductor patterns P1, P2, and P3 are formed on the base material layer S1. Conductive pattern L1b3 is formed in base material layer S12. Interlayer connection conductors (via conductors) are formed on the base material layers S2 to S12. Moreover, the end surface electrode connected with the conductor patterns P1, P2, and P3 is formed on the end surface of the multilayer body.

  In FIG. 13, a dot symbol and a cross symbol represent the direction of the magnetic flux φ shown in FIG.

  According to the present embodiment, the following effects can be obtained.

(1) Since the first inductor and the second inductor are constituted by a parallel circuit of a plurality of coils, a desired small inductor value can be obtained.

(2) Since two coils are arranged in one layer and have two coil opening surfaces, the coils are arranged very close to each other in the layer direction, and the respective coils are coupled to each other with a large coupling value.

(3) Since a plurality of transformers (first transformer and second transformer) are provided, higher coupling can be obtained as compared with a single transformer.

(4) By determining the distance between the first transformer and the second transformer shown in FIG. 11, it is possible to determine the inductance of the transformer while maintaining a predetermined coupling coefficient of the transformer. This effect will be described next.

  What is most important for the coupling coefficient is the distance between the first inductor L1 and the second inductor L2, and the distance between the third inductor L3 and the fourth inductor L4. When these positional relationships are changed, the coupling coefficient changes greatly. However, the first inductor L1 and the third inductor L3 do not originally constitute a transformer, and neither the second inductor L2 nor the fourth inductor L4 constitutes a transformer. Therefore, even if the distance relationship between the first transformer and the second transformer is changed, the function of the transformer does not deteriorate greatly. On the other hand, as shown in FIG. 11, the lines of magnetic force pass through the four coils, so that the coupling coefficient of the transformer can be further increased by reducing the distance between the first transformer and the second transformer. That is, if the coupling coefficient that the first transformer or the second transformer has is expressed as K1, the coupling coefficient K2 when the two transformers are combined is K2 = K1 + α. When the positional relationship between the first transformer and the second transformer is changed, the value of α changes, but the overall coupling coefficient has a value greater than or equal to a single coupling coefficient K1. In this way, the inductance of the transformer can be adjusted according to the distance between the first transformer and the second transformer while maintaining a predetermined transformer coupling coefficient.

  Generally, when the inductance of the transformer is reduced, the electromagnetic field coupling is reduced. However, as in this embodiment, transformers with a large inductance are arranged in parallel and the magnetic flux is shared to suppress the deterioration of the coupling coefficient. It becomes possible.

<< Seventh Embodiment >>
FIG. 14 is a circuit diagram of the high-frequency transformer 207 according to the seventh embodiment. Here, in consideration of the arrangement relationship of the conductor patterns constituting the first inductor L1 and the second inductor L2, the drawing is drawn in the axial direction. Compared with the high-frequency transformer shown in FIG. 11 in the previous embodiment, the configuration of the second transformer is different. In the example shown in FIG. 14, the number of turns of the coil conductor patterns L3a, L3b, L4a, and L4b constituting the second transformer is smaller than the number of turns of the coil conductor patterns L1a, L1b, L2a, and L2b constituting the first transformer. That is, the inductance of each coil of the second transformer is smaller than the inductance of each coil of the first transformer. In this way, the first transformer and the second transformer do not have to have the same inductance of the coils constituting them. This makes it possible to finely adjust the inductance and coupling coefficient of the transformer.

  10 to 14, one inductor is configured with two inductors L1 and L3, and one inductor is configured with two inductors L2 and L4. For example, like a high-frequency transformer shown in FIG. A parallel circuit of three inductors L1, L3, and L5 and a parallel circuit of three inductors L2, L4, and L6 may be configured, or a parallel circuit of three or more inductors may be configured.

<< Other embodiments >>
As mentioned above, although this invention was demonstrated based on specific embodiment, this invention is not limited to said embodiment.

  For example, all of the coil conductor patterns constituting the first inductor and the second inductor need not be provided inside the multilayer body, and a part thereof may be provided on the surface of the multilayer body.

  Each coil conductor pattern includes a laminated coil pattern in which a plurality of one-turn coils are laminated, a multi-turn coil conductor pattern formed on a single layer, and a multi-turn coil conductor pattern formed on each of a plurality of layers. It may be a thing.

A ... branch point CA1 ... first coil opening CA2 ... second coil opening L1 ... first inductor L1a, L1b, L1c, L1d ... first coil conductor pattern L2 ... second inductor L2a, L2b, L2c, L2d ... second coil Conductor patterns L3a, L3b, L4a, L4b ... Coil conductor pattern M ... Mutual inductance P1 ... First input / output port (or its conductor pattern)
P2: Second input / output port (or its conductor pattern)
P3: Third input / output port (or its conductor pattern)
S1 to S10 ... base material layers Z1, Z2, Z3 ... inductance element 11 ... antenna element 12 ... matching circuit 30 ... feeder circuit 101, 106 ... antenna device 111 ... conductor patterns 121, 122, 123 ... conductor patterns 131, 132 ... conductors Pattern 141 ... Conductor patterns 201 to 207 ... High-frequency transformers 211, 212 ... Conductor patterns 221, 222, 223 ... Conductor patterns 231, 232, 233 ... Conductor patterns 312, 313, 314 ... Conductor patterns

Claims (8)

A first inductor and a third inductor connected between the first input / output port and the second input / output port, and a second inductor and a second inductor connected between the second input / output port and the third input / output port A high-frequency transformer including four inductors, wherein the first inductor, the second inductor, the third inductor, and the fourth inductor are magnetically coupled to each other;
The first inductor has two first coil conductor patterns, the third inductor has two third coil conductor patterns, the second inductor has two second coil conductor patterns, The four inductor has two fourth coil conductor patterns,
One of the two first coil conductor patterns, one second coil conductor pattern of the two second coil conductor patterns, and one third of the two third coil conductor patterns . The fourth coil conductor pattern, one of the coil conductor pattern and the two fourth coil conductor patterns, has a first coil winding axis,
The other first coil conductor pattern of the two first coil conductor patterns, the other second coil conductor pattern of the two second coil conductor patterns, and the third one of the two third coil conductor patterns. The other coil coil pattern of the coil conductor pattern and the two fourth coil conductor patterns has a second coil winding axis,
The two first coil conductor patterns and the two third coil conductor patterns are connected in parallel to each other,
One first coil conductor pattern of the two first coil conductor patterns and one third coil conductor pattern of the two third coil conductor patterns are disposed adjacent to each other in the first coil winding axis direction , before SL sandwiched one of the second coil conductor pattern and the two first coil winding axis direction by the one of the fourth coil conductor pattern of the fourth coil conductor patterns of the two second coil conductor patterns,
A high-frequency transformer characterized by that. Said two second coil conductor patterns and the two fourth coil conductor patterns are connected in parallel to each other, the high-frequency transformer according to claim 1. Said first transformer with two first coil conductor pattern the two second coil conductor pattern is formed, the second transformer configured between the two third coil conductor pattern and the two fourth coil conductor patterns The high frequency transformer according to claim 1 or 2, wherein The two third coil conductor patterns, said has an inductance different from the two first coil conductor patterns, high-frequency transformer according to claim 1. The two fourth coil conductor patterns, said has a different inductance and two second coil conductor patterns, high-frequency transformer according to claim 4. The two first coil conductor pattern, wherein the two second coil conductor patterns, said two third coil conductor patterns and the two fourth coil conductor patterns, the laminated body formed by laminating a plurality of substrate layers The high frequency transformer according to any one of claims 1 to 5, which is built in. In high frequency components with high frequency transformers,
The high-frequency transformer is a high-frequency component that is the high-frequency transformer according to claim 1. In a communication terminal device equipped with a high-frequency transformer in the communication signal transmission unit,
The said high frequency transformer is a communication terminal device which is a high frequency transformer in any one of Claims 1-6.

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