Radio frequency power amplifier and radio frequency front end module

Abstract

The application discloses a radio frequency power amplifier, which comprises a first power amplification unit, a second power amplification unit and a signal synthesis network, wherein the signal synthesis network comprises a first winding and a second winding connected with the first power amplification unit and the second power amplification unit, and a third winding and a fourth winding connected in parallel; the sum of the number of coils coupled with the first winding in the third winding and the fourth winding is equal to the sum of the number of coils coupled with the second winding in the third winding and the fourth winding, so as to improve the problem of excessive loss of the signal synthesis network in the radio frequency power amplifier caused by poor balance, and further improve the power synthesis efficiency of the radio frequency power amplifier.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radio frequency technology, and in particular to a radio frequency power amplifier and a radio frequency front-end module. BACKGROUND

[0002] Radio frequency power amplifiers are widely used in the field of mobile terminals. At present, with the development of communication systems, higher demands are put forward for the performance of radio frequency power amplifiers. The design indicators of radio frequency power amplifiers usually include output power, loss, efficiency, gain, bandwidth and linearity, etc. In particular, the loss and efficiency have always been the focus of attention, and the power loss of the radio frequency power amplifier becomes an important performance indicator for measuring the operating efficiency of the power amplifier, which plays a crucial role in the entire communication system. SUMMARY

[0003] The embodiments of the present application provide a radio frequency front-end module and a radio frequency front-end module, which solve the problem of large power loss of the radio frequency front-end module.

[0004] A radio frequency power amplifier, comprising: a first power amplification unit, a second power amplification unit and a signal synthesis network; the signal synthesis network comprises a first winding, a second winding, a third winding and a fourth winding; the first power amplification unit is connected with the first winding, and the second power amplification unit is connected with the second winding; a first end of the third winding and a first end of the fourth winding are connected to a ground end, and a second end of the third winding and a second end of the fourth winding are connected to a signal transmission end; the third winding comprises n coils M={m1, m2, m3,..., m n n is a positive integer greater than or equal to 2; wherein one end of the first coil m1 is connected with the ground end, and one end of the nth coil m n is connected with the signal transmission end;

[0005] The fourth winding comprises n coils K={k1, k2, k3,..., k n n is a positive integer greater than or equal to 2; wherein one end of the first coil k1 is connected with the ground end, and one end of the nth coil k n is connected with the signal transmission end; wherein the sum of the number of coils in the third winding coupled with the first winding and the number of coils in the fourth winding coupled with the first winding is n, and the sum of the number of coils in the third winding coupled with the second winding and the number of coils in the fourth winding coupled with the second winding is n.

[0006] Further, the coil in the third winding coupled with the first winding, the coil in the fourth winding coupled with the first winding and the first winding form a first coupling region; the coil in the third winding coupled with the second winding, the coil in the fourth winding coupled with the second winding and the second winding form a second coupling region; wherein the first coupling region and the second coupling region are adjacent and non-overlapping regions.

[0007] Further, the coil m1 in the third winding is coupled with the first winding, the coil m2 in the third winding is coupled with the second winding, the coil k1 in the fourth winding is coupled with the first winding, and the coil k2 in the fourth winding is coupled with the second winding. n Further, the coil m1 in the third winding is coupled with the first winding, the coil m2 in the third winding is coupled with the second winding, the coil k1 in the fourth winding is coupled with the first winding, and the coil k2 in the fourth winding is coupled with the second winding. n Further, the coil m1 in the third winding is coupled with the first winding, the coil m2 in the third winding is coupled with the second winding, the coil k1 in the fourth winding is coupled with the first winding, and the coil k2 in the fourth winding is coupled with the second winding.

[0008] Further, the coil m1 in the third winding is coupled with the first winding, the coil m2 in the third winding is coupled with the second winding, the coil k1 in the fourth winding is coupled with the first winding, and the coil k2 in the fourth winding is coupled with the second winding. n Further, the coil m1 in the third winding is coupled with the first winding, the coil m2 in the third winding is coupled with the second winding, the coil k1 in the fourth winding is coupled with the first winding, and the coil k2 in the fourth winding is coupled with the second winding. n Further, the coil m1 in the third winding is coupled with the first winding, the coil m2 in the third winding is coupled with the second winding, the coil k1 in the fourth winding is coupled with the first winding, and the coil k2 in the fourth winding is coupled with the second winding.

[0009] Further, the ground end of the third winding is arranged in the inner periphery of the first coupling region, the signal transmission end of the third winding is arranged in the outer periphery of the first coupling region and / or the second coupling region, the ground end of the fourth winding is arranged in the inner periphery of the second coupling region, and the signal transmission end of the third winding is arranged in the outer periphery of the first coupling region and / or the second coupling region.

[0010] Further, the ground end of the third winding is arranged in the inner periphery of the first coupling region, the signal transmission end of the third winding is arranged in the outer periphery of the first coupling region and / or the second coupling region, the ground end of the fourth winding is arranged in the inner periphery of the first coupling region, and the signal transmission end of the third winding is arranged in the outer periphery of the first coupling region and / or the second coupling region.

[0011] Further, the coil in the third winding coupled with the first winding, the coil in the fourth winding coupled with the first winding and the first winding form a first coupling region; the coil in the third winding coupled with the second winding, the coil in the fourth winding coupled with the second winding and the second winding form a second coupling region; wherein the first coupling region and the second coupling region are adjacent and non-overlapping regions.

[0012] Further, the third winding and the fourth winding are arranged in different metal layers, or the third winding and the fourth winding are arranged in the same metal layer.

[0013] Part of the n coils M of the third winding are arranged in one metal layer, and the other part of the n coils M of the third winding are arranged in another metal layer, and / or part of the n coils N of the fourth winding are arranged in one metal layer, and the other part of the n coils N of the fourth winding are arranged in another metal layer.

[0014] Further, the first winding and the second winding are arranged in a second metal layer, the third winding is arranged in a first metal layer, the fourth winding is arranged in the first metal layer, a projection of the third winding on a vertical direction at least partially overlaps with a projection of the first winding and the second winding on the vertical direction, and a projection of the fourth winding on the vertical direction at least partially overlaps with a projection of the first winding and the second winding on the vertical direction.

[0015] Further, the first winding includes a first primary coil and a second primary coil, the second winding includes a third primary coil and a fourth primary coil, the first primary coil, the third primary coil, and the third winding are arranged in the same metal layer, the third winding is coupled with the first primary coil and the third primary coil in the same layer, the second primary coil, the fourth primary coil, and the fourth winding are arranged in the same metal layer, and the fourth winding is coupled with the second primary coil and the fourth primary coil in the same layer.

[0016] Further, coil serial numbers {a1, a2, a3...an} in a set M 11 = {m a1 ,m a2 ,m a3 ,...,m an} of the third winding coupled with the first winding are the same as coil serial numbers {a1, a2, a3...an} in a set K = {k 11 ,k b1 ,k b2 ,...,k b3} of the fourth winding coupled with the second winding, and coil serial numbers {b1, b2, b3...bn} in a set M 21 = {m b1 ,m b2 ,m b3 ,...,m bn} of the third winding coupled with the second winding are the same as coil serial numbers {b1, b2, b3...bn} in a set K 11 = {k b1 ,k b2 ,k b3 ,...,k bn} of the fourth winding coupled with the first winding.

[0017] Further, the first winding is coupled with odd-numbered coils in the third winding; the second winding is coupled with even-numbered coils in the third winding, the first winding is coupled with even-numbered coils in the fourth winding; the second winding is coupled with odd-numbered coils in the fourth winding; or, the first winding is coupled with even-numbered coils in the third winding; the second winding is coupled with odd-numbered coils in the third winding, the first winding is coupled with odd-numbered coils in the fourth winding; the second winding is coupled with even-numbered coils in the fourth winding.

[0018] Further, the first winding is coupled with a coil set M 11 in the third winding, M 11 ={m1, m4, m5, m8, m9,... m n-2 , m n-1}, wherein the serial number of a coil at an odd-numbered position in the coil set M 11 is added by 3 to be the next coil, and the serial number of a coil at an even-numbered position is added by 1 to be the next coil; the second winding is coupled with a coil set M 21 in the third winding, M 21 ={m2, m3, m6, m7, m 10 ,... m m-3 , m n}, wherein the serial number of a coil at an even-numbered position in the coil set M 21 is added by 1 to be the next coil, and the serial number of a coil at an odd-numbered position is added by 3 to be the next coil; the first winding is coupled with a coil set k 11 in the fourth winding, k 11 ={k2, k3, k6, k7, k 10 ,... k m-3 , k n}, wherein the serial number of a coil at an even-numbered position in the coil set k 11 is added by 1 to be the next coil, and the serial number of a coil at an odd-numbered position is added by 3 to be the next coil; the second winding is coupled with a coil set K 21 in the fourth winding, K 21 ={k1, k4, k5, k8, k9,... k n-2 , k n-1}, wherein the serial number of a coil at an odd-numbered position in the coil set K 21 is added by 3 to be the next coil, and the serial number of a coil at an even-numbered position is added by 1 to be the next coil.

[0019] Further, the first winding is coupled with a coil set M 11 in the third winding, M 11= {m1, m2, m5, m6, m9,...m n-1 , n}, wherein the sequence number of the coil in odd position in the coil set M 11 is added by 1 to be the next coil, and the sequence number of the coil in even position is added by 3 to be the next coil; the coil set M 21 in the second winding is coupled with the coil set M 21 = {m3, m4, m7, m8, m 11 ,...m m-3 , m-2}, wherein the sequence number of the coil in odd position in the coil set M 21 is added by 1 to be the next coil, and the sequence number of the coil in even position is added by 3 to be the next coil; the coil set K 11 in the first winding is coupled with the coil set K 11 = {k3, k4, k7, k8, k 11 ,...k n-3 , n-2}, wherein the sequence number of the coil in odd position in the coil set K 11 is added by 1 to be the next coil, and the sequence number of the coil in even position is added by 3 to be the next coil; the coil set K 21 in the second winding is coupled with the coil set K 21 = {k1, k2, k5, k6, k9,...k n-1 , n}, wherein the sequence number of the coil in odd position in the coil set K 21 is added by 1 to be the next coil, and the sequence number of the coil in even position is added by 3 to be the next coil.

[0020] Further, the n coils M of the third winding are arranged in different metal layers, the arrangement in different metal layers is divided into different coils, the arrangement in different regions of the same metal layer is divided into different coils, and the arrangement in different levels of the same region is divided into different coils; the n coils K of the third winding are arranged in different metal layers, the arrangement in different metal layers is divided into different coils, the arrangement in different regions of the same metal layer is divided into different coils, and the arrangement in different levels of the same region is divided into different coils.

[0021] Further, the first power amplification unit comprises a first amplification transistor, and the second power amplification unit comprises a second amplification transistor; an input end of the first amplification transistor is connected with a first end of the first winding, a second end of the first winding is connected with a first end of the second winding, and an input end of the second amplification transistor is connected with a second end of the second winding; or, an output end of the first amplification transistor is connected with the first end of the first winding, the second end of the first winding is connected with the first end of the second winding, and an output end of the second amplification transistor is connected with the second end of the second winding.

[0022] Further, the first power amplification unit comprises a first amplification transistor, and the second power amplification unit comprises a second amplification transistor; an input end of the first amplification transistor is connected with a first end of the first winding, a second end of the first winding is connected with a first end of the second winding, and an input end of the second amplification transistor is connected with a second end of the second winding; or, an output end of the first amplification transistor is connected with the first end of the first winding, the second end of the first winding is connected with the first end of the second winding, and an output end of the second amplification transistor is connected with the second end of the second winding.

[0023] Further, the first power amplification unit comprises a first amplification transistor and a third amplification transistor, and the second power amplification unit comprises a second amplification transistor and a fourth amplification transistor; an input end of the first amplification transistor is connected with a first end of the first winding, an input end of the third amplification transistor is connected with a second end of the first winding, an input end of the second amplification transistor is connected with a second end of the second winding, and an input end of the fourth amplification transistor is connected with a first end of the second winding; or, an output end of the first amplification transistor is connected with the first end of the first winding, an output end of the third amplification transistor is connected with the second end of the first winding, an output end of the second amplification transistor is connected with the second end of the second winding, and an output end of the fourth amplification transistor is connected with the first end of the second winding.

[0024] Further, the first amplification transistor is a BJT tube, including a base, a collector and an emitter, the base of the first amplification transistor is the input end of the first amplification transistor, the collector of the first amplification transistor is the output end of the first amplification transistor, and the emitter of the first amplification transistor is grounded; the second amplification transistor is a BJT tube, including a base, a collector and an emitter, the base of the second amplification transistor is the input end of the second amplification transistor, the collector of the second amplification transistor is the output end of the second amplification transistor, and the emitter of the second amplification transistor is grounded; the third amplification transistor is a BJT tube, including a base, a collector and an emitter, the base of the third amplification transistor is the input end of the third amplification transistor, the collector of the third amplification transistor is the output end of the third amplification transistor, and the emitter of the third amplification transistor is grounded; the fourth amplification transistor is a BJT tube, including a base, a collector and an emitter, the base of the fourth amplification transistor is the input end of the fourth amplification transistor, the collector of the fourth amplification transistor is the output end of the fourth amplification transistor, and the emitter of the fourth amplification transistor is grounded; or, the first amplification transistor is a MOS tube, including a gate, a source and a drain, the gate of the first amplification transistor is the input end of the first amplification transistor, the source of the first amplification transistor is the output end of the first amplification transistor, and the drain of the first amplification transistor is grounded; the second amplification transistor is a MOS tube, including a gate, a source and a drain, the gate of the second amplification transistor is the input end of the second amplification transistor, the source of the second amplification transistor is the output end of the second amplification transistor, and the drain of the second amplification transistor is grounded; the third amplification transistor is a MOS tube, including a gate, a source and a drain, the gate of the third amplification transistor is the input end of the third amplification transistor, the source of the third amplification transistor is the output end of the third amplification transistor, and the drain of the third amplification transistor is grounded; the fourth amplification transistor is a MOS tube, including a gate, a source and a drain, the gate of the fourth amplification transistor is the input end of the fourth amplification transistor, the source of the fourth amplification transistor is the output end of the fourth amplification transistor, and the drain of the fourth amplification transistor is grounded.

[0025] Further, the first end of the third winding is connected to the ground end through a first capacitor, and the first end of the fourth winding is connected to the ground end through a second capacitor; the first capacitor is arranged in the first coupling region, and the second capacitor is arranged in the second coupling region, or the first capacitor is arranged outside the second coupling region, and the second capacitor is arranged outside the first coupling region.

[0026] Further, the first end of the third winding and the first end of the fourth winding are connected and then connected to the ground end through a third capacitor, and the third capacitor is arranged outside the first coupling area and outside the second coupling area.

[0027] The radio frequency power amplifier comprises a power amplifier circuit and a signal synthesis network, the signal synthesis network comprises a first winding, a second winding, a third winding and a fourth winding; the power amplifier circuit is connected with the first winding and the second winding; the first end of the third winding and the first end of the fourth winding are connected to a ground end, and the second end of the third winding and the second end of the fourth winding are connected to a signal transmission end; the third winding comprises n coils M={m1, m2, m3,..., m n n is a positive integer greater than or equal to 2; wherein one end of the first coil m1 is connected with the ground end, and one end of the nth coil m n is connected with the signal transmission end; the fourth winding comprises n coils K={k1, k2, k3,..., k n n is a positive integer greater than or equal to 2; wherein one end of the first coil k1 is connected with the ground end, and one end of the nth coil k n is connected with the signal transmission end; the sum of the number of coils in the third winding coupled with the first winding and the number of coils in the fourth winding coupled with the first winding is n, and the sum of the number of coils in the third winding coupled with the second winding and the number of coils in the fourth winding coupled with the second winding is n.

[0028] The radio frequency power amplifier comprises a power amplifier circuit and a signal synthesis network, the signal synthesis network comprises a first winding, a second winding, a third winding and a fourth winding; the power amplifier circuit is connected with the first winding and the second winding; the first end of the third winding and the first end of the fourth winding are connected to a ground end, and the second end of the third winding and the second end of the fourth winding are connected to a signal transmission end; the third winding comprises n coils M={m1, m2, m3,..., m n n is a positive integer greater than or equal to 2; wherein one end of the first coil m1 is connected with the ground end, and one end of the nth coil m nOne end of the winding is connected to the signal transmission end; the fourth winding includes n coils K = {k1,k2,k3,...,k...} sequentially connected in series between the grounding end and the signal transmission end. n}, where n is a positive integer greater than or equal to 2; wherein, one end of the first coil k1 is connected to the grounding terminal, and the nth coil k n One end is connected to the signal transmission end; the sum of the number of coils coupled to the first winding in the third winding and the number of coils coupled to the first winding in the fourth winding is n, and the sum of the number of coils coupled to the second winding in the third winding and the number of coils coupled to the second winding in the fourth winding is n; the signal synthesis network in this embodiment includes a first winding and a second winding connected to the first power amplification unit and the second power amplification unit, as well as a third winding and a fourth winding connected in parallel. By making the sum of the number of coils coupled to the first winding in the third winding and the fourth winding the same as the sum of the number of coils coupled to the second winding in the third winding and the fourth winding, the problem of excessive loss in the signal synthesis network in the RF power amplifier is improved, thereby improving the power synthesis efficiency of the RF power amplifier. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of a radio frequency power amplifier in one embodiment of the present invention;

[0031] Figure 2 This is another structural schematic diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0032] Figure 3 This is a circuit diagram of a radio frequency power amplifier in one embodiment of the present invention;

[0033] Figure 4 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0034] Figure 5 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0035] Figure 6 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0036] Figure 7is another circuit schematic diagram of the radio frequency power amplifier in an embodiment of the present application;

[0037] Figure 8 is another circuit schematic diagram of the radio frequency power amplifier in an embodiment of the present application;

[0038] Figure 9 is another circuit schematic diagram of the radio frequency power amplifier in an embodiment of the present application;

[0039] Figure 10 is another circuit schematic diagram of the radio frequency power amplifier in an embodiment of the present application;

[0040] Figure 11 is another circuit schematic diagram of the radio frequency power amplifier in an embodiment of the present application.

[0041] In the figure, 10 is a first power amplification unit; 20 is a second power amplification unit; 11 is a first amplification transistor; 12 is a second amplification transistor; 21 is a third amplification transistor; 22 is a fourth amplification transistor; 301 is a first winding; 302 is a second winding; 303 is a third winding; 304 is a fourth winding; and 40 is a post-stage circuit. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0043] It should be understood that the present application can be implemented in different forms and should not be interpreted as being limited to the embodiments presented herein. On the contrary, these embodiments are provided to make the disclosure complete and fully and to fully convey the scope of the present application to those skilled in the art. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity throughout the drawings the same reference numerals represent the same elements.

[0044] It will be understood that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on or connected to the other element or layer or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.

[0045] Spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0046] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0047] For a thorough understanding of the present application, reference should be made to the following detailed description taken in conjunction with the accompanying drawings, in which:

[0048] This embodiment provides a radio frequency (RF) power amplifier, which is applied in an RF front-end module. An RF front-end module is a device that integrates two or more discrete components, such as RF switches, low-noise amplifiers, filters, duplexers, power amplifiers, and transformers, into a single independent module. This improves the integration and hardware performance of the RF front-end module and reduces its size. Specifically, the RF front-end module can be used in devices such as smartphones, tablets, and smartwatches; it can operate in 2G, 3G, 4G, 5G, or Wi-Fi frequency bands.

[0049] In at least one embodiment, a radio frequency power amplifier is proposed, such as Figures 1 to 8 As shown, it includes a first power amplification unit, a second power amplification unit, and a signal synthesis network 30. The signal synthesis network includes a first winding 301, a second winding 302, a third winding 303, and a fourth winding 304.

[0050] The first power amplifier unit is connected to the first winding, and the second power amplifier unit is connected to the second winding. The first end of the third winding 303 and the first end of the fourth winding 304 are connected to the ground terminal, and the second end of the third winding 303 and the second end of the fourth winding 304 are connected to the signal transmission terminal. The first end of the third winding 303 and the first end of the fourth winding 304 can be connected to the same ground terminal or to different ground terminals.

[0051] The third winding 303 includes n coils M = {m1, m2, m3, ..., mn} sequentially connected in series between the grounding terminal and the signal transmission terminal. n}, where n is a positive integer greater than or equal to 2; wherein, one end of the first coil m1 is connected to the grounding terminal, and the nth coil m n One end is connected to the signal transmission end.

[0052] The fourth winding 304 includes n coils K = {k1,k2,k3,...,k...} sequentially connected in series between the grounding terminal and the signal transmission terminal. n}, where n is a positive integer greater than or equal to 2; wherein, one end of the first coil k1 is connected to the grounding terminal, and the nth coil k n One end is connected to the signal transmission end.

[0053] The sum of the number of coils in the third winding 303 coupled with the first winding 301 and the number of coils in the fourth winding 304 coupled with the first winding 301 is n; the sum of the number of coils in the third winding 303 coupled with the second winding 302 and the number of coils in the fourth winding 404 coupled with the second winding 302 is n; by making the sum of the number of coils in the third winding and the fourth winding coupled with the first winding equal to the sum of the number of coils in the third winding and the fourth winding coupled with the second winding, the balance of the signal synthesis network in the radio frequency power amplifier is improved, so that the impedance / phase imbalance between the first power amplification unit and the second power amplification unit is improved, and the problem of excessive loss of the radio frequency power amplifier is solved, and the power synthesis efficiency of the radio frequency power amplifier is improved.

[0054] Optionally, the radio frequency power amplifier can be any type of amplification circuit such as a differential power amplification circuit, a Doherty power amplification circuit, a balanced power amplification circuit, a double single-ended hybrid power amplification circuit, a double differential power amplification circuit, etc., and the type of power amplification circuit is not limited in the embodiment.

[0055] Optionally, the signal synthesis network can be an input-end signal synthesis network or an output-end signal synthesis network. For example, the signal synthesis network can be an input-end signal synthesis network, and the signal synthesis network is connected with the input end of the power amplification circuit. Alternatively, the signal synthesis network can be an output-end signal synthesis network, and the signal synthesis network is connected with the output end of the power amplification circuit.

[0056] In at least one embodiment, referring to FIG. 1, Figure 2 The radio frequency power amplifier is a double single-ended hybrid power amplification circuit, the first output end of the double single-ended hybrid power amplification circuit is connected with the first end of the first winding 301, the second end of the first winding 301 is grounded or connected with a power supply end, the second output end of the double single-ended hybrid power amplification circuit is connected with the first end of the second winding 302, and the second end of the second winding 302 is grounded or connected with a power supply end.

[0057] In at least one embodiment, referring to FIG. 1, Figure 3As shown, the radio frequency power amplifier is a double differential power amplifier circuit, that is, the power amplifier circuit includes two differential amplifier circuits, which are a first differential amplifier circuit and a second differential amplifier circuit. Among them, the first output end of the first differential amplifier circuit is connected with the first end of the first winding 301, and the second output end of the first differential amplifier circuit is connected with the second end of the first winding 301; the first output end of the second differential amplifier circuit is connected with the first end of the second winding 302, and the second output end of the second differential amplifier circuit is connected with the second end of the second winding 303.

[0058] In at least one embodiment, the first winding 301 and the second winding 302 are arranged in the same metal layer, the first winding 301 can be a separate coil, the second winding 302 can be a separate coil, or the first winding 301 can be a non-separable complete coil, and the second winding 302 can be a non-separable complete coil.

[0059] In at least one embodiment, the third winding and the fourth winding can be arranged in different metal layers, respectively. For example, the n coils M of the third winding are arranged in the first metal layer, and the n coils K of the fourth winding are arranged in the second metal layer. Alternatively, the third winding and the fourth winding can be arranged in the same metal layer. For example, the n coils M of the third winding and the n coils K of the fourth winding are arranged in the first metal layer.

[0060] In at least one embodiment, part of the n coils M of the third winding are arranged in one metal layer, and the other part are arranged in another metal layer, and part of the n coils K of the fourth winding are arranged in one metal layer, and the other part are arranged in another metal layer. For example, part of the n coils M of the third winding are arranged in the first metal layer, and the other part are arranged in the second metal layer, and part of the n coils K of the fourth winding are arranged in the first metal layer, and the other part are arranged in the second metal layer.

[0061] In at least one embodiment, the third winding 303 and the fourth winding 304 can be arranged in the same metal layer as the first winding 301 and the second winding 302 to realize the same layer side edge coupling between the third winding 303 and the fourth winding 304 and the first winding 301 and the second winding 302. The third winding 303 and the fourth winding 304 can also be arranged in different metal layers from the first winding 301 and the second winding 302 to realize the upper and lower layer coupling between the third winding 303 and the fourth winding 304 and the first winding 301 and the second winding 302.

[0062] In at least one embodiment, the third winding 303 and the fourth winding 304 can be disposed in the same metal layer or different metal layers; the third winding 303 and the fourth winding 304 are connected in parallel. The n coils M included in the third winding 303 can be disposed in the same metal layer or different metal layers, are divided into different coils when disposed in different metal layers, are divided into different coils when disposed in different regions of the same metal layer, and are divided into different coils when disposed in different levels of the same region. Similarly, the n coils N included in the fourth winding 304 can be disposed in the same metal layer or different metal layers, are divided into different coils when disposed in different metal layers, are divided into different coils when disposed in different regions of the same metal layer, and are divided into different coils when disposed in different levels of the same region. It should be noted that the levels disposed in the same region refer to the inner and outer levels in the same region of the same metal layer.

[0063] In the present embodiment, the length of each coil, the size and shape of the actually wound coil can be the same or different, and the length, size and shape of the coil in the present embodiment are not limited. It can be understood that, since the coils divided into different coils when disposed in different metal layers, the coils divided into different coils when disposed in different regions of the same metal layer, and the coils divided into different coils when disposed in different levels of the same region in the present embodiment. Therefore, the coil in the present embodiment can be a coil wound to form a loop, and can also be a coil wound to form a half loop, a one-third loop, a two-thirds loop, or any length and shape of coil. It should be noted that the loop in the present embodiment is not a loop forming a closed loop, that is, the two ends of the coil wound to form a loop are not connected. In a specific embodiment, the n coils included in the third winding are divided into one coil when wound to form a loop, and are also divided into one coil when the two ends of the third winding form a non-loop (for example: a coil wound to form a half loop, a one-third loop, a two-thirds loop, or any length and shape of coil) during winding, as long as they are disposed in different metal layers, or disposed in different regions of the same metal layer, or disposed in different levels of the same region.

[0064] In at least one embodiment, the coil of the third winding coupled with the first winding, the coil of the fourth winding coupled with the first winding, and the first winding form a first coupling region; the coil of the third winding coupled with the second winding, the coil of the fourth winding coupled with the second winding, and the second winding form a second coupling region; or, the first winding, the second winding, the third winding, and the fourth winding are coupled with each other to form a first coupling region. It should be noted that the number of coupling regions formed by the mutual coupling of the first winding, the second winding, the third winding, and the fourth winding is not specifically limited in the present embodiment.

[0065] In at least one embodiment, the sum of the number of coils in the third winding that are coupled to the first winding and the number of coils in the fourth winding that are coupled to the first winding is n, and the sum of the number of coils in the third winding that are coupled to the second winding and the number of coils in the fourth winding that are coupled to the second winding is n. It can be appreciated that the sum of the number of coils in the third winding that are coupled to the first winding and the number of coils in the fourth winding that are coupled to the first winding is the same as the sum of the number of coils in the third winding that are coupled to the second winding and the number of coils in the fourth winding that are coupled to the second winding.

[0066] As an example: the third winding 303 includes coil ml, coil m2, and coil m3, the fourth winding 304 includes coil kl, coil k2, and coil k3, the first winding 301 can be coupled to coil ml and coil m2 in the third winding 303, and coupled to coil k3 in the fourth winding 304, and the second winding 302 can be coupled to coil m3 in the third winding 303, and coupled to coil kl and coil k2 in the fourth winding 304. Alternatively, the first winding 301 can be coupled to coil ml and coil m3 in the third winding 303, and coupled to coil k2 in the fourth winding 304, and the second winding 302 can be coupled to coil m2 in the third winding 303, and coupled to coil kl and coil k3 in the fourth winding 304.

[0067] It should be noted that the present embodiment does not specifically limit the specific serial numbers of the coils in the third winding that are coupled to the first winding, the specific serial numbers of the coils in the fourth winding that are coupled to the first winding, the specific serial numbers of the coils in the third winding that are coupled to the second winding, and the specific serial numbers of the coils in the fourth winding that are coupled to the second winding, as long as the sum of the number of coils in the third winding that are coupled to the first winding and the number of coils in the fourth winding that are coupled to the first winding is n, and the sum of the number of coils in the third winding that are coupled to the second winding and the number of coils in the fourth winding that are coupled to the second winding is n.

[0068] In this embodiment, the radio frequency power amplifier includes a first power amplification unit, a second power amplification unit, and a signal synthesis network. The signal synthesis network includes a first winding, a second winding, a third winding, and a fourth winding. The first power amplification unit is connected to the first winding, and the second power amplification unit is connected to the second winding. The first ends of the third winding and the fourth winding are connected to a ground terminal, and the second ends of the third winding and the fourth winding are connected to a signal transmission terminal. The third winding includes n coils M = {m1, m2, m3, ..., m...} sequentially connected in series between the ground terminal and the signal transmission terminal. n}, where n is a positive integer greater than or equal to 2; wherein, one end of the first coil m1 is connected to the grounding terminal, and the nth coil m n One end of the winding is connected to the signal transmission end; the fourth winding includes n coils K = {k1,k2,k3,...,k...} sequentially connected in series between the grounding end and the signal transmission end. n}, where n is a positive integer greater than or equal to 2; wherein, one end of the first coil k1 is connected to the grounding terminal, and the nth coil k n One end is connected to the signal transmission end; the sum of the number of coils coupled to the first winding in the third winding and the number of coils coupled to the first winding in the fourth winding is n, and the sum of the number of coils coupled to the second winding in the third winding and the number of coils coupled to the second winding in the fourth winding is n; the signal synthesis network in this embodiment includes a first winding and a second winding connected to the power amplification unit, and a third winding and a fourth winding connected in parallel. By making the sum of the number of coils coupled to the first winding in the third winding and the fourth winding the same as the sum of the number of coils coupled to the second winding in the third winding and the fourth winding, the balance of the signal synthesis network in the RF power amplifier is improved, thereby improving the impedance / phase imbalance between the first power amplification unit and the second power amplification unit, thus solving the problem of excessive loss in the RF power amplifier, and thus improving the power synthesis efficiency of the RF power amplifier.

[0069] For reference Figure 9 As shown, the horizontal axis represents the operating frequency, and the vertical axis represents the imaginary impedance. Figure 9 Figure 1-2 shows the imaginary impedance curves of the first and second power amplifier units in the prior art. 'a' represents the imaginary impedance curve of the first power amplifier circuit, and 'b' represents the imaginary impedance curve of the second power amplifier circuit. As can be seen from Figure 1-2, the imaginary impedances of the first and second power amplifier circuits are different over a wide frequency band. Figure 9Figure 1-1 shows the imaginary impedance curves of the first and second power amplifier units in the improved version of this application. As can be seen from Figure 1-1, the imaginary impedances of the first and second power amplifier circuits overlap over a wide bandwidth. The imaginary impedances of the first and second power amplifier units are the same over a wide bandwidth, achieving impedance balance between the first and second power amplifier units, thereby improving the balance of the RF power amplifier.

[0070] For reference Figure 10 As shown, the horizontal axis represents the operating frequency, and the vertical axis represents the real impedance. Figure 10 Figure 2-2 shows the real impedance curves of the first and second power amplifier units in the prior art. 'a' represents the real impedance curve of the first power amplifier circuit, and 'b' represents the real impedance curve of the second power amplifier circuit. As shown in Figure 2-2, the real impedances of the first and second power amplifier circuits are different over a wide frequency band. Figure 10 Figure 2-1 shows the real impedance curves of the first and second power amplifier units in the improved version of this application. As can be seen from Figure 2-1, the real impedances of the first and second power amplifier circuits overlap over a wide bandwidth. The real impedances of the first and second power amplifier units are the same over a wide bandwidth, achieving impedance balance between the first and second power amplifier units, thereby improving the balance of the RF power amplifier.

[0071] For reference Figure 11 As shown, the horizontal axis represents the operating frequency, and the vertical axis represents the power combining efficiency. Here, b is the curve of a prior art RF power amplifier, and a is the curve of the RF power amplifier in this application. Figure 11 As shown, this application improves the balance of the RF power amplifier by modifying the signal synthesis network, and its power synthesis efficiency is significantly higher than that of the RF power amplifier in the prior art.

[0072] In one specific embodiment, reference is made to the following Figures 6-8As shown, the power amplification circuit comprises a first power amplification unit 10 and a second power amplification unit 20, the first power amplification unit 10 is connected with the first winding 301, and the second power amplification unit 20 is connected with the second winding 302; the coil in the third winding 303 which is coupled with the first winding 301, the coil in the fourth winding 304 which is coupled with the first winding 301, and the first winding 301 form a first coupling region; the coil in the third winding 303 which is coupled with the second winding 302, the coil in the fourth winding 304 which is coupled with the second winding 302, and the second winding 302 form a second coupling region; wherein the first coupling region and the second coupling region are adjacent and non-overlapping regions.

[0073] The first power amplification unit 10 can comprise one power amplification transistor, or can comprise two power amplification transistors, and similarly, the second power amplification unit 20 can comprise one power amplification transistor, or can comprise two power amplification transistors. For example, when the first power amplification unit 10 comprises one power amplification transistor, and the second power amplification unit 20 comprises one power amplification transistor, the first power amplification unit 10 and the second power amplification unit 20 can constitute a differential amplification circuit, a double single-ended combined amplification circuit, or a Doherty amplification circuit. When the first power amplification unit 10 comprises two power amplification transistors, and the second power amplification unit 20 comprises two power amplification transistors, the first power amplification unit 10 and the second power amplification unit 20 can constitute a double differential amplification circuit.

[0074] In at least one embodiment, the first coupling region and the second coupling region are located in different regions and arranged adjacent to each other, that is, the first coupling region and the second coupling region are arranged adjacent to each other in a separated manner. The first winding and the second winding are located in different regions of the same metal layer, that is, the first winding and the second winding are two separated coils. The coil in the third winding 303 which is coupled with the first winding 301, the coil in the fourth winding 304 which is coupled with the first winding 301, and the first winding 301 are coupled with each other to form a first coupling region, the first coupling region comprises a first coupling center, the coil in the third winding 303 which is coupled with the second winding 302, the coil in the fourth winding 304 which is coupled with the second winding 302, and the second winding 302 are coupled with each other to form a second coupling region, and the second coupling region comprises a second coupling center. It can be understood that the coils located in the same coupling region are coupled with each other.

[0075] In this embodiment, the power amplifier circuit includes a first power amplifier unit and a second power amplifier unit. The first power amplifier unit is connected to the first winding, and the second power amplifier unit is connected to the second winding. The coil coupled to the first winding in the third winding, the coil coupled to the first winding in the fourth winding, and the first winding form a first coupling region. The coil coupled to the second winding in the third winding, the coil coupled to the second winding in the fourth winding, and the second winding form a second coupling region. The first coupling region and the second coupling region are adjacent and non-overlapping regions. In this embodiment, the first winding, the second winding, the third winding, and the fourth winding are mutually coupled to form adjacent and non-overlapping first and second coupling regions, thereby improving the balance of the signal synthesis network and making the circuit layout of the signal synthesis network more flexible.

[0076] In one specific embodiment, coil m1 in the third winding is coupled to the first winding, and coil m in the third winding... n Coupled with the second winding, coil k1 in the fourth winding is coupled with the second winding, and coil k in the fourth winding is coupled with the second winding. n It is coupled to the first winding.

[0077] Alternatively, coil m1 in the third winding is coupled to the second winding, and coil m in the third winding... n Coupled with the first winding, coil k1 in the fourth winding is coupled with the first winding, and coil k in the fourth winding is coupled with the first winding. n It is coupled to the second winding.

[0078] Wherein, the coil in the third winding closest to the grounding terminal is the section of the third winding directly connected to the grounding terminal. For example, by Figures 6-8 The coil m1 shown. The coil in the third winding closest to the signal transmission end is the section of the third winding directly connected to the signal transmission end. For example: Figure 6 m2 as shown, Figure 7 The m3 shown is as follows Figure 8 The m4 shown.

[0079] Similarly, the coil in the fourth winding closest to the grounding terminal is the section of the fourth winding directly connected to the grounding terminal. For example, by Figures 6-8 The coil k1 shown. The coil in the fourth winding closest to the signal transmission end is the section of the fourth winding directly connected to the signal transmission end. For example: Figure 6 As shown, k2, Figure 7 As shown in the figure, k3, Figure 8 k4 is shown.

[0080] In at least one embodiment, in order to improve the balance of the signal synthesis network in the radio frequency power amplifier, the third winding middle coil m1 is coupled with the first winding, the third winding middle coil m n The fourth winding middle coil k1 is coupled with the second winding, the fourth winding middle coil k n is coupled with the first winding. Alternatively, the third winding middle coil m1 is coupled with the second winding, the third winding middle coil m n is coupled with the first winding, the fourth winding middle coil k1 is coupled with the first winding, the fourth winding middle coil k n is coupled with the second winding, so that the third winding middle coil m n and the fourth winding middle coil k1 are coupled with the second winding, and the third winding middle coil m1 and the fourth winding middle coil k n are coupled with the first winding; the winding mode of the coil in the third winding is opposite to the winding mode of the coil in the fourth winding, the balance of the signal synthesis network in the radio frequency power amplifier is improved, the impedance / phase imbalance between the first power amplification unit and the second power amplification unit is improved, and the problem of excessive loss of the radio frequency power amplifier is solved, so as to improve the power synthesis efficiency of the radio frequency power amplifier.

[0081] As an example, assuming that the coil coupled with the first winding is marked as A, and the coil coupled with the second winding is marked as B, the mark of the coil M in the third winding and the mark of the coil K in the fourth winding are (AxxB, BxxA) or (BxxA, AxxB). It should be noted that the number of xx of the middle coil and the specific winding mode in the embodiment are not limited, as long as the coil connected with the ground end and the coil connected with the signal transmission end in the third winding and the fourth winding are reversely wound.

[0082] In a specific embodiment, the ground end of the third winding is arranged in the inner periphery of the first coupling area, the signal transmission end of the third winding is arranged in the outer periphery of the second coupling area, the ground end of the fourth winding is arranged in the inner periphery of the second coupling area, and the signal transmission end of the third winding is arranged in the outer periphery of the first coupling area.

[0083] Alternatively, the ground end of the third winding is arranged in the inner periphery of the second coupling area, the signal transmission end of the third winding is arranged in the outer periphery of the first coupling area, the ground end of the fourth winding is arranged in the inner periphery of the first coupling area, and the signal transmission end of the third winding is arranged in the outer periphery of the second coupling area.

[0084] In at least one embodiment, since the coil connected with the ground end can be directly grounded or grounded through a capacitor, and the coil connected with the signal transmission end needs to be connected with the external circuit 40, the embodiment sets the end connected with the ground end in the inner periphery of the first coupling area or the second coupling area, and sets the end connected with the signal transmission end in the outer periphery of the first coupling area or the second coupling area, so that not only the loss caused by the jumper wire when the signal transmission end is connected with the external device or circuit can be reduced, but also the space utilization can be improved by using the spare area between the first coupling area and the second coupling area, and thus the layout of the signal synthesis network is more compact.

[0085] In a specific embodiment, the coil in the third winding 303 coupled with the first winding 301 is wound along a first direction, and the coil in the third winding 303 coupled with the second winding 302 is wound along a second direction, with the signal transmission end of the third winding 303 as the starting point.

[0086] The coil in the fourth winding 304 coupled with the second winding 302 is wound along a second direction, and the coil in the fourth winding 304 coupled with the first winding 301 is wound along a first direction, with the signal transmission end of the fourth winding 304 as the starting point.

[0087] The first direction is a clockwise direction, and the second direction is a counterclockwise direction, or the first direction is a counterclockwise direction, and the second direction is a clockwise direction.

[0088] In at least one embodiment, a part of the coils in the third winding 303 are coupled with the first winding, and another part of the coils are coupled with the second winding. By making the winding direction of the coil in the third winding coupled with the first winding opposite to the winding direction of the coil in the third winding coupled with the second winding, the jumper wire when the coil in the third winding 303 coupled with the first winding and the coil in the third winding 303 coupled with the second winding are connected can be reduced, and the winding mode of the coil in the third winding 303 is more flexible and simple.

[0089] In at least one embodiment, a part of the coils in the fourth winding 304 are coupled with the first winding, and another part of the coils are coupled with the second winding. By making the winding direction of the coil in the fourth winding 304 coupled with the first winding opposite to the winding direction of the coil in the fourth winding 304 coupled with the second winding, the jumper wire when the coil in the fourth winding 304 coupled with the first winding and the coil in the fourth winding 304 coupled with the second winding are connected can be reduced, and the winding mode of the coil in the fourth winding 304 is more flexible and simple.

[0090] In at least one embodiment, since the first winding and the second winding are respectively arranged around different regions of the same metal layer, i.e., respectively arranged around the first coupling region and the second coupling region, by coupling the coil connected with the ground end in the third winding and the coil connected with the signal transmission end in the fourth winding with the second winding, and coupling the coil connected with the signal transmission end in the third winding and the coil connected with the ground end in the fourth winding with the first winding, or coupling the coil connected with the ground end in the third winding and the coil connected with the signal transmission end in the fourth winding with the first winding, and coupling the coil connected with the signal transmission end in the third winding and the coil connected with the ground end in the fourth winding with the second winding, and by taking the signal transmission end of the third winding as a starting point, and making the arrangement of the coil coupled with the first winding in the third winding and the arrangement of the coil coupled with the second winding in the third winding opposite in direction, and taking the signal transmission end of the fourth winding as a starting point, and making the arrangement of the coil coupled with the first winding in the fourth winding and the arrangement of the coil coupled with the second winding in the fourth winding opposite in direction, the coil of the third winding and the coil of the fourth winding are coupled with the first winding and the second winding respectively in a manner of reverse complementary arrangement, thereby further optimizing the balance of the signal synthesis network in the radio frequency power amplifier to reduce the overall loss of the radio frequency power amplifier.

[0091] In a specific embodiment, the third winding and the fourth winding are respectively arranged in different metal layers, or the third winding and the fourth winding are both arranged in the same metal layer.

[0092] In at least one embodiment, the third winding and the fourth winding are respectively arranged in different metal layers. For example, the n coils M of the third winding are arranged in a first metal layer, and the n coils K of the fourth winding are arranged in a second metal layer. By arranging the third winding and the fourth winding in different metal layers, the number of jumpers can be reduced, thereby reducing the loss.

[0093] In at least one embodiment, the third winding and the fourth winding are both arranged in the same metal layer, for example, the n coils M of the third winding and the n coils K of the fourth winding are both arranged in a first metal layer. By arranging the third winding and the fourth winding in the same metal layer, the distance from the ground end when the third winding and the fourth winding are connected with the ground end is the same, ensuring balance, and the layout of the signal synthesis network is more compact, only 2L metal plates are needed to achieve low cost.

[0094] In an embodiment, part of the n windings M of the third winding are arranged in one of the metal layers, and the other part of the n windings M are arranged in the other metal layer, and / or part of the n windings K of the fourth winding are arranged in one of the metal layers, and the other part of the n windings K are arranged in the other metal layer. For example, half of the n windings M of the third winding are arranged in the first metal layer, and the other half of the n windings M are arranged in the second metal layer, and / or half of the n windings K of the fourth winding are arranged in the first metal layer, and the other half of the n windings K are arranged in the second metal layer, so as to improve the problem that the distances from the third winding and the fourth winding to the ground terminal are different when the third winding and the fourth winding are connected to the ground terminal, and further to reduce the jumper wires, and further to reduce the loss while improving the balance.

[0095] In an embodiment, the first winding 301 and the second winding 302 are arranged in the second metal layer, the third winding 303 is arranged in the first metal layer, and the fourth winding 304 is arranged in the first metal layer, and the projection of the third winding 303 in the vertical direction at least partially overlaps the projection of the first winding 301 and the second winding 302 in the vertical direction, and the projection of the fourth winding 304 in the vertical direction at least partially overlaps the projection of the first winding 301 and the second winding 302 in the vertical direction.

[0096] In at least one embodiment, the larger the overlapping area of the projection of the third winding 303 in the vertical direction with the first winding 301 and the second winding 302, the better the coupling coefficient between the third winding 303 and the first winding 301 and the second winding 302, and the larger the overlapping area of the projection of the fourth winding 304 in the vertical direction with the first winding 301 and the second winding 302, the better the coupling coefficient between the fourth winding 304 and the first winding 301 and the second winding 302. It can be understood that when the projection of the third winding 303 in the vertical direction completely overlaps the first winding 301 and the second winding 302, and the projection of the fourth winding 304 in the vertical direction completely overlaps the first winding 301 and the second winding 302, the coupling coefficient of the signal synthesis network is optimal.

[0097] In at least one embodiment, the third winding is disposed in a metal layer vertically adjacent to a metal layer in which the first winding 301 and the second winding 302 are disposed, the third winding is coupled to the first winding 301 and the second winding 302 in an up-down manner, the fourth winding is disposed in a metal layer vertically adjacent to a metal layer in which the first winding 301 and the second winding 302 are disposed, and the fourth winding is coupled to the first winding 301 and the second winding 302 in an up-down manner. This not only greatly improves the coupling coefficient of the signal synthesis network to improve the balance of the signal synthesis network, but also reduces the loss while ensuring a small occupied area, thereby improving the bandwidth, linearity and efficiency of the radio frequency power amplifier.

[0098] In one embodiment, the first winding includes a first primary coil and a second primary coil, the second winding includes a third primary coil and a fourth primary coil, the first primary coil, the third primary coil and the third winding are disposed in the same metal layer, and the third winding is coupled to the first primary coil and the third primary coil in the same layer. The second primary coil, the fourth primary coil and the fourth winding are disposed in the same metal layer, and the fourth winding is coupled to the second primary coil and the fourth primary coil in the same layer.

[0099] In at least one embodiment, the third winding and the fourth winding are respectively disposed in different metal layers and connected in parallel, and the third winding is coupled to part of the coils in the first winding and part of the coils in the second winding, and the fourth winding is coupled to part of the coils in the first winding and part of the coils in the second winding. Therefore, by making the first winding include a first primary coil and a second primary coil, the second winding include a third primary coil and a fourth primary coil, and making the first primary coil, the third primary coil and the third winding disposed in the same metal layer, the third winding coupled to the first primary coil and the third primary coil in the same layer, and the second primary coil, the fourth primary coil and the fourth winding disposed in the same metal layer, the fourth winding coupled to the second primary coil and the fourth primary coil in the same layer, the third winding is coupled to part of the coils in the first winding and part of the coils in the second winding in the same layer, and the fourth winding is coupled to part of the coils in the first winding and part of the coils in the second winding in the same layer.

[0100] In at least one embodiment, the first and second primary coils in the first winding can be connected in parallel, and the third and fourth primary coils in the second winding can be connected in parallel. Alternatively, the first and second primary coils in the first winding can be connected in series, and the third and fourth primary coils in the second winding can be connected in series. The first and second primary coils, which are disposed in different metal layers, can be connected through metal vias, and the third and fourth primary coils, which are disposed in different metal layers, can also be connected through metal vias. Provided that the inductance of the fourth winding of the third winding remains unchanged, if the first and second primary coils are connected in parallel, and the third and fourth primary coils in the second winding are connected in parallel, the signal synthesis network has a relatively large number of turns, resulting in a large impedance transformation. If the first and second primary coils are connected in series, and the third and fourth primary coils in the second winding are connected in series, the signal synthesis network has a relatively small number of turns, resulting in a small impedance transformation.

[0101] In one specific embodiment, the set M in the third winding that is coupled to the first winding 11 ={m a1 ,m a2 ,m a3 ,...,m an The coil numbers in} are {a1, a2, a3...a...} n The set of windings coupled to the second winding in the fourth winding. The coil numbers in the middle are {a1, a2, a3...a... n}same.

[0102] The set M that is coupled to the second winding in the third winding 21 ={m b1 ,m b2 ,m b3 ,...,m bn The coil numbers in} are {b1,b2,b3...b} n The set K coupled to the first winding in the fourth winding 11 ={k b1 ,k b2 ,k b3 ,...,k bn The coil numbers in} are {b1,b2,b3...b} n}same.

[0103] In at least one embodiment, if the set M of the third winding coupled to the first winding 11 ={m1,m3,m5,...,m n-1the coil serial number in the set M in the third winding coupled with the second winding 21 = {m2, m4, m6,..., m n n} in the fourth winding coupled with the second winding 21 = {k1, k3, k5,..., k n-1 n} in the fourth winding coupled with the first winding 11 = {k2, k4, k6,..., k n n} in the fourth winding coupled with the first winding.

[0104] In another embodiment, if the set M in the third winding coupled with the first winding 11 = {m1, m4, m5,..., m n-2 , m n-1 n} in the fourth winding coupled with the second winding 21 = {k1, k4, k5,..., k n-3 , k n n} in the fourth winding coupled with the second winding 21 = {m1, m4, m5,..., m n-2 , m n-1 n} in the fourth winding coupled with the first winding 11 = {k2, k3, k6, k7,..., k n-3 , k n n} in the fourth winding coupled with the first winding.

[0105] It should be noted that the above two embodiments are only exemplary, and the present application only needs to ensure that the coil serial number in the set in the third winding coupled with the first winding is the same as the coil serial number in the set in the fourth winding coupled with the second winding, and the coil serial number in the set in the third winding coupled with the second winding is the same as the coil serial number in the set in the fourth winding coupled with the first winding; so as to realize that the coils in the third winding and the coils in the fourth winding are coupled with the first winding and the second winding respectively in a reverse complementary winding manner, thereby further optimizing the balance of the signal synthesis network in the radio frequency power amplifier and improving the power synthesis efficiency of the radio frequency power amplifier.

[0106] In one embodiment, the first winding is coupled to odd-numbered coils in the third winding; the second winding is coupled to even-numbered coils in the third winding, the first winding is coupled to even-numbered coils in the fourth winding; and the second winding is coupled to odd-numbered coils in the fourth winding.

[0107] Alternatively, the first winding is coupled to even-numbered coils in the third winding; the second winding is coupled to odd-numbered coils in the third winding, the first winding is coupled to odd-numbered coils in the fourth winding; and the second winding is coupled to even-numbered coils in the fourth winding.

[0108] In at least one embodiment, the coil numbers in set M 11 = {m1, m3, m5,..., m n-1 n-1} in the third winding coupled to the first winding, and the coil numbers in set M 21 = {m2, m4, m6,..., m n n} in the third winding coupled to the second winding, then the coil numbers in set K 21 = {k1, k3, k5,..., k n-1 n-1} in the fourth winding coupled to the second winding, and the coil numbers in set K 11 = {k2, k4, k6,..., k n n} in the fourth winding coupled to the first winding. Alternatively, the coil numbers in set M 11 = {m1, m3, m5,..., m n-1 n-1} in the third winding coupled to the second winding, and the coil numbers in set M 21 = {m2, m4, m6,..., m n n} in the third winding coupled to the first winding, then the coil numbers in set K 21 = {k1, k3, k5,..., k n-1 n-1} in the fourth winding coupled to the first winding, and the coil numbers in set K 11 = {k2, k4, k6,..., k n n} in the fourth winding coupled to the second winding.

[0109] In this embodiment, by coupling the first winding to the odd-numbered coils in the third winding; coupling the second winding to the even-numbered coils in the third winding; coupling the first winding to the even-numbered coils in the fourth winding; and coupling the second winding to the odd-numbered coils in the fourth winding; or coupling the first winding to the even-numbered coils in the third winding; coupling the second winding to the odd-numbered coils in the third winding; coupling the first winding to the odd-numbered coils in the fourth winding; and coupling the second winding to the even-numbered coils in the fourth winding, the coils of the third winding and the coils of the fourth winding are coupled to the first winding and the second winding respectively in a reverse complementary winding manner. That is, by optimizing the balance of the signal synthesis network in the RF power amplifier, the impedance / phase imbalance between the first power amplification unit and the second power amplification unit can be improved, thereby improving the power synthesis efficiency of the RF power amplifier.

[0110] In one specific embodiment, the coil set M in the first winding and the third winding 11 Coupling, M 11 ={m1,m4,m5,m8,m9,...m n-2 ,m n-1}, where the coil set M 11 The coil in an odd position is numbered 3 to become the next coil, and the coil in an even position is numbered 1 to become the next coil.

[0111] The coil set M in the second winding and the third winding 21 Coupling, M 21 ={m2,m3,m6,m7,m 10 ,...m m-3 ,m n}, where the coil set M 21 The coil in an even position is numbered 1 to become the next coil; and the coil in an odd position is numbered 3 to become the next coil.

[0112] The coil set K in the first winding and the fourth winding 11 Coupling, K 11 ={k2,k3,k6,k7,k 10 ,...k m-3 ,k n}, where the coil set K 11 The coil in an even position is numbered 1 to become the next coil; and the coil in an odd position is numbered 3 to become the next coil.

[0113] The coil set K in the second winding and the fourth winding 21 Coupling, K21 ={k1,k4,k5,k8,k9,...k n-2 ,k n-1}, where the coil set K 21 The coil in an odd position is numbered 3 to become the next coil, and the coil in an even position is numbered 1 to become the next coil.

[0114] As an example, to satisfy the condition that the coil numbers in the set coupled to the first winding in the third winding are the same as the coil numbers in the set coupled to the second winding in the fourth winding, the first winding and the third winding have the following coil numbers: 1st coil m1, 4th coil m4, 5th coil m5, ..., N-2th coil m1. n-2 and the (N-1)th coil m n-1 Coupling, and so on, satisfies the set M of coils. 11 The sequence of coils in odd-numbered positions is determined by adding 3 to their number to get the next coil, and the sequence of coils in even-numbered positions is determined by adding 1 to their number. For example, adding 3 to the first coil m1 in an odd-numbered position gives the next coil as the fourth coil m4. Adding 1 to the fourth coil m4 in an even-numbered position gives the next coil as the fifth coil m5. Since the fifth coil m5 is in an odd-numbered position, its next coil is the eighth coil m8, which is 3 times its coil number. The eighth coil m8 is in an even-numbered position, so its next coil is the ninth coil m9, which is 1 time greater than its coil number, and so on. Similarly, the sequence of coils k1, k4, k5, ..., kN-2 in the second winding and the fourth winding is also determined by adding 3 to their coil numbers. n-2 and the (N-1)th coil k n-1 Coupling, and so on, satisfies the set K of coils. 21 The sequence is as follows: for coils in odd positions, add 3 to their number to get the next coil; for coils in even positions, add 1 to their number to get the next coil. For example: adding 3 to the first coil (k1) in an odd position gives the fourth coil (k4); adding 1 to the fourth coil (k4) in an even position gives the fifth coil (k5). Since the fifth coil (k5) is in an odd position, its next coil is the eighth coil (k8) with a number 3 greater than its number. The eighth coil (k8) is in an even position, so its next coil is the ninth coil (k9) with a number 1 greater than its number, and so on.

[0115] As an example, in order to satisfy the condition that the coil numbers in the set coupled to the second winding in the third winding are the same as the coil numbers in the set coupled to the first winding in the fourth winding, the second winding and the third winding's second coil m2, third coil m3, sixth coil m6, seventh coil m7..., n-3rd coil m... n-3 and the nth coil m n Coupling. And so on, satisfying the coil set M. 21 To determine the next coil, simply add 3 to the coil number in odd-numbered positions, and add 1 to the coil number in even-numbered positions. For example, adding 1 to the second coil (m2) in an even-numbered position gives the third coil (m3). Adding 3 to the third coil (m3) in an odd-numbered position gives the sixth coil (m6). Since the sixth coil (m6) is in an even-numbered position, its next coil is the seventh coil (m7) with its coil number increased by 1. The seventh coil (m7) is in an odd-numbered position, so its next coil is the tenth coil (m10) with its coil number increased by 3. 10 And so on. Similarly, the first winding and the second coil k2, third coil k3, sixth coil k6, seventh coil k7..., n-3rd coil k in the fourth winding... n-3 and the nth coil k n Coupling. And so on, satisfying the coil set K. 11 To determine the next coil, simply add 3 to the coil number in odd-numbered positions, and add 1 to the coil number in even-numbered positions. For example, adding 1 to the second coil (k2) in an even-numbered position gives the third coil (k3). Adding 3 to the third coil (k3) in an odd-numbered position gives the sixth coil (k6). Since the sixth coil (k6) is in an even-numbered position, its next coil is the seventh coil (k7) with its coil number increased by 1. The seventh coil (k7) is in an odd-numbered position, so its next coil is the tenth coil (k7) with its coil number increased by 3. 10 And so on.

[0116] In one specific embodiment, the coil set M in the first winding and the third winding 11 Coupling, M 11 ={m1,m2,m5,m6,m9,...m n-1 ,m n}, where the coil set M 31 The coil in an odd position is numbered 1 to become the next coil, and the coil in an even position is numbered 3 to become the next coil.

[0117] The coil set M in the second winding and the third winding21 Coupled, M 21 = {m3, m4, m7, m8, m 11 ,...m m-3 ,m m-2}, where the sequence number of a coil in odd position in the set M 21 is incremented by 1 to get the next coil, and the sequence number of a coil in even position is incremented by 3 to get the next coil.

[0118] The first winding is coupled to a set of coils k 11 in the fourth winding, k 11 = {k3, k4, k7, k8, k 11 ,...k n-3 ,k n-2}, where the sequence number of a coil in odd position in the set k 11 is incremented by 1 to get the next coil, and the sequence number of a coil in even position is incremented by 3 to get the next coil.

[0119] The second winding is coupled to a set of coils K 21 in the fourth winding, K 21 = {k1, k2, k5, k6, k9,...k n-1 ,k n}, where the sequence number of a coil in odd position in the set K 21 is incremented by 1 to get the next coil, and the sequence number of a coil in even position is incremented by 3 to get the next coil.

[0120] As an example, to satisfy that the sequence number of a coil in the set in the third winding that is coupled to the first winding is the same as the sequence number of a coil in the set in the fourth winding that is coupled to the second winding. The first winding is coupled to a set of coils M 11 in the third winding, M 11 = {m1, m2, m5, m6, m9,...m n-1 ,m n}, where the sequence number of a coil in odd position in the set M 31The coil number in an odd-numbered position is incremented by 1 to become the next coil, and the coil number in an even-numbered position is incremented by 3 to become the next coil. For example, incrementing the first coil m1 in an odd-numbered position by 1 gives the next coil m2, and incrementing the second coil m2 in an even-numbered position by 3 gives the next coil m5, the fifth coil. Since the fifth coil m5 is in an odd-numbered position, the next coil after the fifth coil m5 is the sixth coil m6, whose coil number is incremented by 1. The sixth coil m6 is in an even-numbered position, so the next coil after the sixth coil m6 is the ninth coil m9, whose coil number is incremented by 3. Similarly, the coil set K in the second winding and the fourth winding... 21 Coupling, K 21 ={k1,k2,k5,k6,k9,...k n-1 ,k n}, where the coil set K 21 The sequence number of the coil in an odd position is increased by 1 to become the next coil, and the sequence number of the coil in an even position is increased by 3 to become the next coil. For example, the first coil k1 in an odd position is increased by 1 to become the second coil k2. The second coil k2 in an even position is increased by 3 to become the fifth coil k5. Since the fifth coil k5 is in an odd position, the next coil of the fifth coil k5 is the sixth coil k6, which is increased by 1. The sixth coil k6 is in an even position, so the next coil of the sixth coil k6 is the ninth coil k9, which is increased by 3.

[0121] As an example, in order to satisfy the condition that the coil numbers in the set coupled to the second winding in the third winding are the same as the coil numbers in the set coupled to the first winding in the fourth winding, the coil sets M in the second winding and the third winding are... 21 Coupling, M 21 ={m3,m4,m7,m8,m 11 ,...m m-3 ,m m-2}, where the coil set M 21 The sequence of coils is as follows: For coils in odd positions, the coil number is increased by 1 to become the next coil; for coils in even positions, the coil number is increased by 3 to become the next coil. For example: The 3rd coil (m3) in an odd position, increased by 1, becomes the 4th coil (m4). The 4th coil (m4) in an even position, increased by 3, becomes the 7th coil (m7). Since the 7th coil (m7) is in an odd position, its next coil is the 8th coil (m8) with the coil number increased by 1. The 8th coil (m8) is in an even position, so its next coil is the 11th coil (m1) with the coil number increased by 3. 11Similarly, the coil set K in the first winding and the fourth winding 11 Coupling, K 11 ={k3,k4,k7,k8,k 11 ,...k n-3 ,k n-2}, where the coil set K 11 The sequence of coils is as follows: For coils in odd positions, the coil number is increased by 1 to become the next coil; for coils in even positions, the coil number is increased by 3 to become the next coil. For example, coil 3 (octet 3) in an odd position is increased by 1 to become coil 4 (octet 4). Coil 4 (octet 4) in an even position is increased by 3 to become coil 7 (octet 7). Since coil 7 (octet 7) is in an odd position, its next coil is coil 8 (octet 8) with the coil number increased by 1. Coil 8 (octet 8) is in an even position, so its next coil is coil 11 (octet 11) with the coil number increased by 3. 11 .

[0122] In one specific embodiment, the n coils M of the third winding are disposed in the same metal layer, disposed in different metal layers as different coils, disposed in different regions of the same metal layer as different coils, and disposed in different levels of the same region as different coils.

[0123] The n coils N of the third winding are arranged in the same metal layer, and those arranged in different metal layers are divided into different coils. Those arranged in different regions of the same metal layer are divided into different coils, and those arranged in different levels of the same region are divided into different coils.

[0124] In at least one embodiment, the n coils connected in series between the grounding terminal and the signal transmission terminal can be divided as follows:

[0125] If n coils M are disposed in the same metal layer, then coils disposed in different areas are classified as different coils, and coils disposed in different layers (e.g., inner layer, middle layer, outer layer, etc.) within the same area are classified as different coils. Figure 6 For example, suppose Figure 6 The third winding 303 is disposed in the same metal layer. Figure 5 The third winding 303 is divided into four coils. Coils m1 and m2 are located in the same region of the same metal layer, and coils m3 and m4 are located in the same region of the same metal layer. Coils m1 and m2 are located in different regions of the same metal layer from coils m3 and m4. Coils m1 and m2 are located at different levels (coil m1 is located in the inner layer relative to coil m2), and coils m3 and m4 are located at different levels (coil m3 is located in the inner layer relative to coil m4).

[0126] Similarly, if n coils K are arranged in the same metal layer, then coils arranged in different areas are classified as different coils, and coils arranged in different layers within the same area (e.g., inner layer, middle layer, outer layer, etc.) are classified as different coils. Figure 6 For example, suppose Figure 6 The third winding 303 is disposed in the same metal layer. Figure 5 The fourth winding 304 is divided into four coils. Coils k1 and k2 are located in the same region of the same metal layer, and coils k3 and k4 are located in the same region of the same metal layer. Coils k1 and k2 are located in different regions of the same metal layer from coils k3 and k4. Coils k1 and k2 are located at different levels (coil k1 is located in the inner layer relative to coil k2), and coils k3 and k4 are located at different levels (coil k3 is located in the inner layer relative to coil k4).

[0127] In one specific embodiment, the first power amplification unit includes a first amplification transistor, and the second power amplification unit includes a second amplification transistor; the input terminal of the first amplification transistor is connected to a first end of the first winding, the second end of the first winding is connected to a first end of the second winding, and the input terminal of the second amplification transistor is connected to a second end of the second winding; or, the output terminal of the first amplification transistor is connected to a first end of the first winding, the second end of the first winding is connected to a first end of the second winding, and the output terminal of the second amplification transistor is connected to a second end of the second winding.

[0128] In the embodiment, the first power amplification unit and the second power amplification circuit are both single-ended amplification circuits. When the signal synthesis network is an input-end signal synthesis network, the input end of the first amplification transistor is connected with the first end of the first winding, the second end of the first winding is connected with the first end of the second winding, and the input end of the second amplification transistor is connected with the second end of the second winding. The signal synthesis network converts the radio frequency input signal into a first radio frequency signal and a second radio frequency signal, and inputs the first radio frequency signal and the second radio frequency signal into the first amplification transistor and the second amplification transistor respectively for amplification processing. When the signal synthesis network is an output-end signal synthesis network, the output end of the first amplification transistor is connected with the first end of the first winding, the second end of the first winding is connected with the first end of the second winding, and the output end of the second amplification transistor is connected with the second end of the second winding. The signal synthesis network converts and synthesizes the first radio frequency amplification signal output by the first amplification transistor and the second radio frequency amplification signal output by the second amplification transistor after amplification processing in the first amplification transistor and the second amplification transistor, and then outputs the first radio frequency amplification signal and the second radio frequency amplification signal. The phase of the first radio frequency amplification signal output by the first amplification transistor is 180 degrees different from the phase of the second radio frequency amplification signal output by the second amplification transistor, and at this time, the radio frequency power amplifier is a differential power amplifier.

[0129] In a specific embodiment, the first power amplification unit includes a first amplification transistor, and the first power amplification unit includes a second amplification transistor. The input end of the first amplification transistor is connected with the first end of the first winding, and the second end of the first winding is grounded or connected with a power supply end. The input end of the second amplification transistor is connected with the first end of the second winding, and the second end of the second winding is grounded or connected with a power supply end. Alternatively, the output end of the first amplification transistor is connected with the first end of the first winding, and the second end of the first winding is grounded or connected with a power supply end. The output end of the second amplification transistor is connected with the first end of the second winding, and the second end of the second winding is grounded or connected with a power supply end.

[0130] In the embodiment, the first power amplification unit and the second power amplification circuit are both single-ended amplification circuits. When the signal synthesis network is an input-end signal synthesis network, the input end of the first amplification transistor is connected with the first end of the first winding, the second end of the first winding is connected with the first end of the second winding, and the input end of the second amplification transistor is connected with the second end of the second winding. The signal synthesis network converts the radio frequency input signal into a first radio frequency signal and a second radio frequency signal, and inputs the first radio frequency signal and the second radio frequency signal into the first amplification transistor and the second amplification transistor respectively for amplification processing. When the signal synthesis network is an output-end signal synthesis network, the output end of the first amplification transistor is connected with the first end of the first winding, the second end of the first winding is connected with the first end of the second winding, and the output end of the second amplification transistor is connected with the second end of the second winding. The signal synthesis network converts and synthesizes the first radio frequency amplification signal output by the first amplification transistor and the second radio frequency amplification signal output by the second amplification transistor after amplification processing in the first amplification transistor and the second amplification transistor, and then outputs the first radio frequency amplification signal and the second radio frequency amplification signal. The phase of the first radio frequency amplification signal output by the first amplification transistor is the same as the phase of the second radio frequency amplification signal output by the second amplification transistor, and at this time, the radio frequency power amplifier is a double single-end combination power amplifier.

[0131] In a specific embodiment, the first power amplification unit includes a first amplification transistor and a third amplification transistor, and the second power amplification unit includes a second amplification transistor and a fourth amplification transistor.

[0132] The input end of the first amplification transistor is connected with the first end of the first winding, the input end of the third amplification transistor is connected with the second end of the first winding, the input end of the second amplification transistor is connected with the second end of the second winding, and the input end of the fourth amplification transistor is connected with the first end of the second winding. Alternatively, the output end of the first amplification transistor is connected with the first end of the first winding, the output end of the third amplification transistor is connected with the second end of the first winding, the output end of the second amplification transistor is connected with the second end of the second winding, and the output end of the fourth amplification transistor is connected with the first end of the second winding.

[0133] In the embodiment, the first power amplification unit and the second power amplification unit are both differential amplification circuits. When the signal synthesis network is an input-end signal synthesis network, the input end of the first amplification transistor is connected with the first end of the first winding, the input end of the third amplification transistor is connected with the second end of the first winding, the input end of the second amplification transistor is connected with the second end of the second winding, and the input end of the fourth amplification transistor is connected with the first end of the second winding. When the signal synthesis network is an output-end signal synthesis network, the output end of the first amplification transistor is connected with the first end of the first winding, the output end of the third amplification transistor is connected with the second end of the first winding, the output end of the second amplification transistor is connected with the second end of the second winding, and the output end of the fourth amplification transistor is connected with the first end of the second winding.

[0134] In a specific embodiment, the first amplification transistor 11 is a BJT transistor, including a base, a collector and an emitter, the base of the first amplification transistor 11 is the input end of the first amplification transistor, the collector of the first amplification transistor 11 is the output end of the first amplification transistor, and the emitter of the first amplification transistor is grounded; the second amplification transistor is a BJT transistor, including a base, a collector and an emitter, the base of the second amplification transistor 12 is the input end of the second amplification transistor 12, the collector of the second amplification transistor is the output end of the second amplification transistor, and the emitter of the second amplification transistor 12 is grounded; the third amplification transistor is a BJT transistor, including a base, a collector and an emitter, the base of the third amplification transistor 21 is the input end of the third amplification transistor, the collector of the third amplification transistor 21 is the output end of the third amplification transistor, and the emitter of the third amplification transistor 21 is grounded; the fourth amplification transistor 22 is a BJT transistor, including a base, a collector and an emitter, the base of the fourth amplification transistor 22 is the input end of the fourth amplification transistor, the collector of the fourth amplification transistor 22 is the output end of the fourth amplification transistor 22, and the emitter of the fourth amplification transistor 22 is grounded.

[0135] Alternatively, in another specific embodiment, the first amplification transistor 11 is a MOS transistor, including a gate, a source and a drain, the gate of the first amplification transistor 11 is the input end of the first amplification transistor, the source of the first amplification transistor 11 is the output end of the first amplification transistor, and the drain of the first amplification transistor 11 is grounded; the second amplification transistor 12 is a MOS transistor, including a gate, a source and a drain, the gate of the second amplification transistor 12 is the input end of the second amplification transistor 12, the source of the second amplification transistor 12 is the output end of the second amplification transistor, and the drain of the second amplification transistor 12 is grounded;

[0136] The third amplification transistor 21 is a MOS transistor, including a gate, a source and a drain, the gate of the third amplification transistor 21 is the input end of the third amplification transistor 21, the source of the third amplification transistor 21 is the output end of the third amplification transistor, and the drain of the third amplification transistor is grounded; the fourth amplification transistor 22 is a MOS transistor, including a gate, a source and a drain, the gate of the fourth amplification transistor 22 is the input end of the fourth amplification transistor, the source of the fourth amplification transistor 22 is the output end of the fourth amplification transistor, and the drain of the fourth amplification transistor 22 is grounded.

[0137] In an embodiment, the first end of the third winding is connected to the ground end through a first capacitor, and the first end of the fourth winding is connected to the ground end through a second capacitor; the first capacitor is arranged in the first coupling area, and the second capacitor is arranged in the second coupling area, or the first capacitor is arranged outside the first coupling area, and the second capacitor is arranged outside the second coupling area.

[0138] The first capacitor and the second capacitor are matching capacitors in the radio frequency power amplifier. Since the third winding and the fourth winding are connected in parallel, the third winding and the fourth winding are respectively connected to the corresponding first capacitor and second capacitor before being connected to the ground end through the capacitors. The first capacitor can be arranged in the first coupling area or outside the first coupling area, and the second capacitor can be arranged in the second coupling area or outside the second coupling area.

[0139] In at least one embodiment, the first capacitor and the second capacitor can be patch capacitors or stacked capacitors, and the embodiment does not limit the specific implementation of the first capacitor and the second capacitor.

[0140] In this embodiment, the third winding and the fourth winding are respectively connected to the corresponding first capacitor and second capacitor before being connected to the ground end through the capacitors, so that the positions of the first capacitor and the second capacitor can be more flexibly arranged, and the flexibility of the circuit is improved.

[0141] In an embodiment, the first end of the third winding and the first end of the fourth winding are connected and then connected to the ground end through a third capacitor, and the third capacitor is arranged outside the first coupling area and outside the second coupling area.

[0142] The third capacitor is a matching capacitor in the radio frequency power amplifier. Since the third winding and the fourth winding are connected in parallel, the third winding and the fourth winding can be connected to the ground terminal through a third capacitor after being connected. The third capacitor is arranged outside the first coupling area and outside the second coupling area, so that the occupied area can be saved.

[0143] In at least one embodiment, the third capacitor can be a patch capacitor or a laminated capacitor, and the embodiment is not limited in a specific implementation manner of the third capacitor.

[0144] The application further provides a radio frequency front-end module, including a substrate, a first chip and a signal synthesis network arranged on the substrate, the first chip including a first power amplifier unit and a second power amplifier unit; the signal synthesis network including a first winding, a second winding, a third winding and a fourth winding; the first power amplifier unit is connected with the first winding, and the second power amplifier unit is connected with the second winding; a first end of the third winding and a first end of the fourth winding are connected to a ground terminal, and a second end of the third winding and a second end of the fourth winding are connected to a signal transmission terminal; the third winding includes n coils M={m1, m2, m3,..., m n n is a positive integer greater than or equal to 2; one end of the first coil m1 is connected with the ground terminal, and one end of the nth coil m n is connected with the signal transmission terminal; the fourth winding includes n coils K={k1, k2, k3,..., k n n is a positive integer greater than or equal to 2; one end of the first coil k1 is connected with the ground terminal, and one end of the nth coil k n is connected with the signal transmission terminal; the sum of the number of coils in the third winding coupled with the first winding and the number of coils in the fourth winding coupled with the first winding is n, and the sum of the number of coils in the third winding coupled with the second winding and the number of coils in the fourth winding coupled with the second winding is n.

[0145] In the embodiment, the signal synthesis network comprises a first winding and a second winding connected with the power amplification units, and a third winding and a fourth winding respectively arranged in different metal layers and connected in parallel, by making the sum of the number of coils in the first winding coupled with the first winding equal to the sum of the number of coils in the third winding and the fourth winding coupled with the second winding, the balance of the signal synthesis network in the radio frequency front-end module is improved, so that the impedance / phase imbalance between the first power amplification unit and the second power amplification unit is improved, the problem of excessive loss of the radio frequency front-end module is solved, and the power synthesis efficiency of the radio frequency front-end module is improved.

[0146] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A radio frequency power amplifier, characterized in that, include: First power amplifier unit, second power amplifier unit, and signal synthesis network; The signal synthesis network includes a first winding, a second winding, a third winding, and a fourth winding; The first power amplifier unit is connected to the first winding, and the second power amplifier unit is connected to the second winding; The first end of the third winding and the first end of the fourth winding are connected to the grounding terminal, and the second end of the third winding and the second end of the fourth winding are connected to the signal transmission terminal. The third winding includes n coils M = {m1, m2, m3, ..., mn} sequentially connected in series between the grounding terminal and the signal transmission terminal. n }, where n is a positive integer greater than or equal to 2; wherein, one end of the first coil m1 is connected to the grounding terminal, and the nth coil m n One end is connected to the signal transmission end; The fourth winding includes n coils K = {k1,k2,k3,...,k...} sequentially connected in series between the grounding terminal and the signal transmission terminal. n }, where n is a positive integer greater than or equal to 2; wherein, one end of the first coil k1 is connected to the grounding terminal, and the nth coil k n One end is connected to the signal transmission end; Wherein, the sum of the number of coils in the third winding coupled to the first winding and the number of coils in the fourth winding coupled to the first winding is n, and the sum of the number of coils in the third winding coupled to the second winding and the number of coils in the fourth winding coupled to the second winding is n.

2. The radio frequency power amplifier as described in claim 1, characterized in that, The coil in the third winding coupled to the first winding, the coil in the fourth winding coupled to the first winding, and the first winding form a first coupling region; The coil in the third winding coupled to the second winding, the coil in the fourth winding coupled to the second winding, and the second winding form a second coupling region; The first coupling region and the second coupling region are adjacent and non-overlapping regions.

3. The radio frequency power amplifier as described in claim 1, characterized in that, The third winding is coupled to the first winding via a coil m1 in the third winding, and the third winding is coupled to the second winding via a coil k1 in the third winding n The fourth winding is coupled to the second winding via a coil k1 in the fourth winding, and the fourth winding is coupled to the first winding via a coil m1 in the fourth winding n The fourth winding is coupled to the second winding via a coil k1 in the fourth winding, and the fourth winding is coupled to the first winding via a coil m1 in the fourth winding Alternatively, the coil m1 in the third winding is coupled to the second winding, the coil m n The coil k1 in the fourth winding is coupled to the first winding, the coil k n The coil k1 in the fourth winding is coupled to the first winding, the coil k 4. The radio frequency power amplifier as described in claim 2, characterized in that, The grounding terminal of the third winding is located within the inner periphery of the first coupling region, and the signal transmission terminal of the third winding is located on the outer periphery of the first coupling region and / or the second coupling region. The grounding terminal of the fourth winding is located within the inner periphery of the second coupling region, and the signal transmission terminal of the third winding is located on the outer periphery of the first coupling region and / or the second coupling region. Alternatively, the grounding terminal of the third winding is located within the inner periphery of the second coupling region, the signal transmission terminal of the third winding is located on the outer periphery of the first coupling region and / or the second coupling region, the grounding terminal of the fourth winding is located within the inner periphery of the first coupling region, and the signal transmission terminal of the third winding is located on the outer periphery of the first coupling region and / or the second coupling region.

5. The radio frequency power amplifier as described in claim 2, characterized in that, Starting from the signal transmission end of the third winding, the coil in the third winding coupled to the first winding is wound along the first direction, and the coil in the third winding coupled to the second winding is wound along the second direction. Starting from the signal transmission end of the fourth winding, the coil in the fourth winding coupled to the second winding is wound along the second direction, and the coil in the fourth winding coupled to the first winding is wound along the first direction. Wherein, the first direction is clockwise and the second direction is counterclockwise, or the first direction is counterclockwise and the second direction is clockwise.

6. The radio frequency power amplifier as described in claim 1, characterized in that, The third winding and the fourth winding are respectively disposed in different metal layers, or the third winding and the fourth winding are both disposed in the same metal layer.

7. The radio frequency power amplifier as described in claim 1, characterized in that, In the third winding, some of the n coils M are disposed in one metal layer and others in another metal layer, and / or, in the fourth winding, some of the n coils K are disposed in one metal layer and others in another metal layer.

8. The radio frequency power amplifier as described in claim 1, characterized in that, The first winding and the second winding are disposed in the second metal layer, the third winding is disposed in the first metal layer, and the fourth winding is disposed in the third metal layer. The third winding and the projection of the first winding and the second winding in the vertical direction at least partially overlap in the vertical direction.

9. The radio frequency power amplifier as described in claim 1, characterized in that, The first winding includes a first primary coil and a second primary coil; The second winding includes a third primary coil and a fourth primary coil; The first primary coil, the third primary coil, and the third winding are disposed on the same metal layer, and the third winding is coupled to the first primary coil and the third primary coil in the same layer; The second primary coil, the fourth primary coil, and the fourth winding are disposed on the same metal layer, and the fourth winding is coupled to the second primary coil and the fourth primary coil in the same layer.

10. The radio frequency power amplifier as claimed in claim 1, characterized in that, complementary entanglement The set M that is coupled to the first winding in the third winding 11 ={m a1 ,m a2 ,m a3 ,...,m an The coil numbers {a1, a2, a3... an} in the fourth winding are the sets of coils coupled to the second winding. The coil numbers {a1,a2,a3...an} in the coils are the same; the set M of the third winding that is coupled to the second winding 21 = {m b1 , m b2 , m b3 ,..., m bn} is the same as the set K of the fourth winding that is coupled to the first winding 11 = {k b1 , k b2 , k b3 ,..., k bn} 11. The radio frequency power amplifier as claimed in claim 1, characterized in that, The first winding is coupled to the odd-numbered coils in the third winding; the second winding is coupled to the even-numbered coils in the third winding; the first winding is coupled to the even-numbered coils in the fourth winding; and the second winding is coupled to the odd-numbered coils in the fourth winding. Alternatively, the first winding is coupled to the even-numbered coils in the third winding; the second winding is coupled to the odd-numbered coils in the third winding; the first winding is coupled to the odd-numbered coils in the fourth winding; and the second winding is coupled to the even-numbered coils in the fourth winding.

12. The radio frequency power amplifier as claimed in claim 1, characterized in that, The coil set M in the first winding and the third winding 11 Coupling, M 11 ={m1,m4,m5,m8,m9,...m n-2 ,m n-1 }, where the coil set M 11 The coil in an odd position is numbered 3 to become the next coil, and the coil in an even position is numbered 1 to become the next coil. The coil set M in the second winding and the third winding 21 Coupling, M 21 ={m2,m3,m6,m7,m 10 ,...m m-3 ,m n }, where the coil set M 21 The coil in an even position is numbered 1 to become the next coil; and the coil in an odd position is numbered 3 to become the next coil. The coil set K in the first winding and the fourth winding 11 Coupling, K 11 ={k2,k3,k6,k7,k 10 ,...k m-3 ,k n }, where the coil set K 11 The coil in an even position is numbered 1 to become the next coil; and the coil in an odd position is numbered 3 to become the next coil. The coil set K in the second winding and the fourth winding 21 Coupling, K 21 ={k1,k4,k5,k8,k9,...k n-2 ,k n-1 }, where the coil set K 21 The coil in an odd position is numbered 3 to become the next coil, and the coil in an even position is numbered 1 to become the next coil.

13. The radio frequency power amplifier as described in claim 1, characterized in that, The coil set M in the first winding and the third winding 11 Coupling, M 11 ={m1,m2,m5,m6,m9,...m n-1 ,m n }, where the coil set M 11 The coil in an odd position is numbered 1 to become the next coil, and the coil in an even position is numbered 3 to become the next coil. The coil set M in the second winding and the third winding 21 Coupling, M 21 ={m3,m4,m7,m8,m 11 ,...m m-3 ,m m-2 }, where the coil set M 21 The coil in an odd position is numbered 1 to become the next coil; and the coil in an even position is numbered 3 to become the next coil. The coil set K in the first winding and the fourth winding 11 Coupling, K 11 ={k3,k4,k7,k8,k 11 ,...k n-3 ,k n-2 }, where the coil set K 11 The coil in an odd position is numbered 1 to become the next coil; and the coil in an even position is numbered 3 to become the next coil. The coil set K in the second winding and the fourth winding 21 Coupling, K 21 ={k1,k2,k5,k6,k9,...k n-1 ,k n }, where the coil set K 21 The coil in an odd position is numbered 1 to become the next coil, and the coil in an even position is numbered 3 to become the next coil.

14. The radio frequency power amplifier as claimed in claim 1, characterized in that, The n coils M of the third winding are arranged in different metal layers. Coils arranged in different metal layers are divided into different coils. Coils arranged in different regions of the same metal layer are divided into different coils. Coils arranged in different levels of the same region are divided into different coils. The n coils K of the third winding are arranged in different metal layers. Coils arranged in different metal layers are divided into different coils. Coils arranged in different regions of the same metal layer are divided into different coils. Coils arranged in different levels of the same region are divided into different coils.

15. The radio frequency power amplifier as claimed in claim 1, characterized in that, The first power amplification unit includes a first amplification transistor, and the second power amplification unit includes a second amplification transistor; The input terminal of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is connected to the first end of the second winding, and the input terminal of the second amplifying transistor is connected to the second end of the second winding. Alternatively, the output terminal of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is connected to the first end of the second winding, and the output terminal of the second amplifying transistor is connected to the second end of the second winding.

16. The radio frequency power amplifier as claimed in claim 1, characterized in that, The first power amplification unit includes a first amplification transistor, and the second power amplification unit includes a second amplification transistor; The input terminal of the first amplifying transistor is connected to the first end of the first winding, and the second end of the first winding is grounded or powered. The input terminal of the second amplifying transistor is connected to the first end of the second winding, and the second end of the second winding is grounded or powered. Alternatively, the output terminal of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is grounded or powered, the output terminal of the second amplifying transistor is connected to the first end of the second winding, and the second end of the second winding is grounded or powered.

17. The radio frequency power amplifier as claimed in claim 1, characterized in that, The first power amplification unit includes a first amplification transistor and a third amplification transistor, and the second power amplification unit includes a second amplification transistor and a fourth amplification transistor; The input terminal of the first amplifying transistor is connected to the first end of the first winding, the input terminal of the third amplifying transistor is connected to the second end of the first winding, the input terminal of the second amplifying transistor is connected to the second end of the second winding, and the input terminal of the fourth amplifying transistor is connected to the first end of the second winding. Alternatively, the output terminal of the first amplifying transistor is connected to the first end of the first winding, the output terminal of the third amplifying transistor is connected to the second end of the first winding, the output terminal of the second amplifying transistor is connected to the second end of the second winding, and the output terminal of the fourth amplifying transistor is connected to the first end of the second winding.

18. The radio frequency power amplifier as claimed in claim 17, characterized in that, The first amplifying transistor is a BJT transistor, including a base, a collector, and an emitter. The base of the first amplifying transistor is the input terminal of the first amplifying transistor, the collector of the first amplifying transistor is the output terminal of the first amplifying transistor, and the emitter of the first amplifying transistor is grounded. The second amplifying transistor is a BJT transistor, including a base, a collector, and an emitter. The base of the second amplifying transistor is the input terminal of the second amplifying transistor, the collector of the second amplifying transistor is the output terminal of the second amplifying transistor, and the emitter of the second amplifying transistor is grounded. The third amplifying transistor is a BJT transistor, including a base, a collector, and an emitter. The base of the third amplifying transistor is the input terminal of the third amplifying transistor, the collector of the third amplifying transistor is the output terminal of the third amplifying transistor, and the emitter of the third amplifying transistor is grounded. The fourth amplifying transistor is a BJT transistor, including a base, a collector, and an emitter. The base of the fourth amplifying transistor is the input terminal of the fourth amplifying transistor, the collector of the fourth amplifying transistor is the output terminal of the fourth amplifying transistor, and the emitter of the fourth amplifying transistor is grounded. Alternatively, the first amplifying transistor is a MOS transistor, including a gate, a source, and a drain. The gate of the first amplifying transistor is the input terminal of the first amplifying transistor, the source of the first amplifying transistor is the output terminal of the first amplifying transistor, and the drain of the first amplifying transistor is grounded. The second amplifying transistor is a MOS transistor, including a gate, a source, and a drain. The gate of the second amplifying transistor is the input terminal of the second amplifying transistor, the source of the second amplifying transistor is the output terminal of the second amplifying transistor, and the drain of the second amplifying transistor is grounded. The third amplifying transistor is a MOS transistor, including a gate, a source, and a drain. The gate of the third amplifying transistor is the input terminal of the third amplifying transistor, the source of the third amplifying transistor is the output terminal of the third amplifying transistor, and the drain of the third amplifying transistor is grounded. The fourth amplifying transistor is a MOS transistor, including a gate, a source, and a drain. The gate of the fourth amplifying transistor is the input terminal of the fourth amplifying transistor, the source of the fourth amplifying transistor is the output terminal of the fourth amplifying transistor, and the drain of the fourth amplifying transistor is grounded.

19. The radio frequency power amplifier as claimed in claim 2, characterized in that, The first end of the third winding is connected to the ground terminal through the first capacitor, and the first end of the fourth winding is connected to the ground terminal through the second capacitor. The first capacitor is disposed within the first coupling region, and the second capacitor is disposed within the second coupling region; alternatively, the first capacitor is disposed outside the second coupling region, and the second capacitor is disposed outside the first coupling region.

20. The radio frequency power amplifier as claimed in claim 2, characterized in that, The first end of the third winding and the first end of the fourth winding are connected and then connected to the grounding terminal through the third capacitor. The third capacitor is located outside the first coupling region and outside the second coupling region.

21. A radio frequency front-end module, characterized in that, include: A substrate and a first chip and a signal synthesis network disposed on the substrate, wherein the first chip includes a first power amplification unit and a second power amplification unit; The signal synthesis network includes a first winding, a second winding, a third winding, and a fourth winding; The first power amplifier unit is connected to the first winding, and the second power amplifier unit is connected to the second winding; The first end of the third winding and the first end of the fourth winding are connected to the grounding terminal, and the second end of the third winding and the second end of the fourth winding are connected to the signal transmission terminal. The third winding includes n coils M = {m1, m2, m3, ..., mn} sequentially connected in series between the grounding terminal and the signal transmission terminal. n }, where n is a positive integer greater than or equal to 2; wherein, one end of the first coil m1 is connected to the grounding terminal, and the nth coil m n One end is connected to the signal transmission end; The fourth winding includes n coils K = {k1,k2,k3,...,k...} sequentially connected in series between the grounding terminal and the signal transmission terminal. n }, where n is a positive integer greater than or equal to 2; wherein, one end of the first coil k1 is connected to the grounding terminal, and the nth coil k n One end is connected to the signal transmission end; The sum of the number of coils in the third winding coupled to the first winding and the number of coils in the fourth winding coupled to the first winding is n. The sum of the number of coils in the third winding coupled to the second winding and the number of coils in the fourth winding coupled to the second winding is n.

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