Multi-mode reconfigurable power amplifier and radio frequency equipment

Abstract

The utility model provides a multi-mode reconfigurable power amplifier and radio frequency equipment, and relates to the technical field of radio frequency. The input matching circuit, the driving amplifier tube and the at least three power amplification circuits with different working frequency bands are integrated on the same power amplifier chip, so that all the power amplification circuits can share the same input matching circuit, the area of the amplifier chip is effectively reduced, the integration level of the chip is improved, and the cost is reduced. All the power amplification circuits respectively correspond to one frequency band mode to carry out switching type operation, so that the reconfigurable function of the power amplifier is realized, and the switching type power amplification operation among at least three frequency band modes is realized on the same amplifier chip in an integrated manner; on the basis of reducing the chip area, the chip design difficulty and the chip manufacturing cost of the amplifier and maintaining relatively high chip integration level, the performance requirements of the power amplifier in different application scenes can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radio frequency (RF) technology, in particular to a multi-mode reconfigurable power amplifier and a radio frequency device. BACKGROUND

[0002] With the continuous development of science and technology, radio frequency technology is widely used in various industries (for example, television, radio, mobile phone, radar, satellite positioning, automatic identification system, etc.), and in the actual application process of radio frequency technology, it is often necessary to use a radio frequency power amplifier to amplify the received radio frequency signal to have sufficient signal power to ensure that the final obtained radio frequency signal can meet the expected signal requirements.

[0003] However, it is worth noting that the traditional single-mode power amplifier can only meet the power amplifier performance requirements of a single operating frequency band, and it is difficult to meet the power amplifier performance requirements of different frequency bands in different application scenarios. Therefore, multiple independent power amplifier chips are usually required for system integration to meet the performance requirements of different frequency bands. In this process, each independent power amplifier chip needs to be designed, produced and tested separately, resulting in a longer implementation cycle, higher overall hardware manufacturing cost and system integration complexity, and obvious product design maintenance difficulty. CONTENT OF THE INVENTION

[0004] Therefore, the purpose of the present application is to provide a multi-mode reconfigurable power amplifier and a radio frequency device, which can integrate and realize switching power amplification operation between at least three frequency band modes on the same amplifier chip, so as to adapt to the power amplifier performance requirements in different application scenarios while maintaining a high chip integration degree, and simultaneously reduce the amplifier chip area, chip design difficulty and chip manufacturing cost.

[0005] In order to achieve the above purpose, the technical solutions adopted by the embodiments of the present application are as follows:

[0006] In a first aspect, the present application provides a multi-mode reconfigurable power amplifier, which comprises an input matching circuit, a driving amplifier tube and at least three power amplification circuits operating in switching mode, wherein the operating frequency bands of the at least three power amplification circuits are different from each other, each power amplification circuit comprises a first switch circuit, an inter-stage matching circuit, a power amplifier tube, an output matching circuit and a second switch circuit, and the circuit on-off states of the first switch circuit and the second switch circuit included in the same power amplification circuit are consistent with each other;

[0007] The signal input end of the driving amplifier tube is externally connected to an input radio frequency signal through the input matching circuit;

[0008] The signal input end of each power amplifier tube is connected to the signal output end of the driver amplifier tube through an inter-stage matching circuit and a first switch circuit;

[0009] The signal output end of each power amplifier tube is connected to the signal output end of the driver amplifier tube through an inter-stage matching circuit and a first switch circuit;

[0010] In an optional embodiment, the input matching circuit comprises a microstrip filter circuit, a first connection matching branch, a first capacitance-to-ground matching branch and a first feeding branch;

[0011] The filter input end of the microstrip filter circuit is used to externally connect the input RF signal;

[0012] The filter output end of the microstrip filter circuit is connected to the first connection end of the first connection matching branch, the middle connection end of the first connection matching branch is connected to the matching input end of the first capacitance-to-ground matching branch, and the middle connection end of the first connection matching branch is connected to the feeding output end of the first feeding branch, wherein the feeding input end of the first feeding branch is externally connected to the first control voltage source of the driver amplifier tube;

[0013] The second connection end of the first connection matching branch is used to connect the signal input end of the driver amplifier tube.

[0014] In an optional embodiment, the input matching circuit further comprises an RLC negative feedback circuit;

[0015] One end of the RLC negative feedback circuit is connected to the signal output end of the driver amplifier tube, and the other end of the RLC negative feedback circuit is connected to the second connection end of the first connection matching branch, wherein the second connection end of the first connection matching branch is connected to the signal input end of the driver amplifier tube through a microstrip line.

[0016] In an optional embodiment, the microstrip filter circuit comprises a first DC blocking capacitor and a second DC blocking capacitor;

[0017] One end of the first DC blocking capacitor is used as the filter input end;

[0018] The other end of the first DC blocking capacitor and one end of the second DC blocking capacitor are connected to each other and grounded through a microstrip line;

[0019] The other end of the second DC blocking capacitor is used as the filter output end.

[0020] In an optional embodiment, in the same power amplifier circuit, the corresponding inter-stage matching circuit comprises a second connection matching branch, a second feeding branch, a third DC blocking capacitor, a third connection matching branch, a fourth DC blocking capacitor, a third feeding branch and an RC parallel circuit, and the corresponding first switch circuit comprises a first switch tube and a second switch tube;

[0021] The first connection end of the second connection matching branch is used for connecting a signal output end of the drive amplifier tube;

[0022] The middle connection end of the second connection matching branch is connected with a feeding output end of the second feeding branch, wherein a feeding input end of the second feeding branch is connected with a second control voltage source of the drive amplifier tube in an external manner;

[0023] The second connection end of the second connection matching branch is connected with a drain of the first switch tube through the third DC blocking capacitor, a source of the first switch tube is connected with a first connection end of the third connection matching branch, a middle connection end of the third connection matching branch is connected with a drain of the second switch tube, and a source of the second switch tube is grounded, wherein the first switch tube and the second switch tube are in opposite states of being turned on and turned off respectively;

[0024] The second connection end of the third connection matching branch is connected with a first end of the RC parallel circuit through the fourth DC blocking capacitor and a microstrip line, and a feeding output end of the third feeding branch is connected with the first end of the RC parallel circuit, wherein a feeding input end of the third feeding branch is connected with a first control voltage source of the corresponding power amplifier tube in an external manner;

[0025] A second end of the RC parallel circuit is used for connecting a signal input end of the corresponding power amplifier tube.

[0026] In an optional embodiment, in the same power amplifier circuit, the corresponding output matching circuit comprises a fourth connection matching branch, a fourth feeding branch, a fifth DC blocking capacitor, a fifth connection matching branch, a sixth DC blocking capacitor and a second capacitor-to-ground matching branch, and the corresponding second switch circuit comprises a third switch tube and a fourth switch tube;

[0027] The first connection end of the fourth connection matching branch is used for connecting a signal output end of the corresponding power amplifier tube;

[0028] The middle connection end of the fourth connection matching branch is connected with a feeding output end of the fourth feeding branch, wherein a feeding input end of the fourth feeding branch is connected with a second control voltage source of the corresponding power amplifier tube in an external manner;

[0029] The second connection end of the fourth connection matching branch is connected with the first connection end of the fifth connection matching branch through the fifth direct-current isolation capacitor, the first connection end of the fifth connection matching branch is connected with the matching input end of the second capacitor-to-ground matching branch, and the first connection end of the fifth connection matching branch is connected with the drain of the third switch tube, and the source of the third switch tube is grounded.

[0030] The middle connection end of the fifth connection matching branch is connected with the drain of the fourth switch tube, and the source of the fourth switch tube is grounded, wherein the on-off states of the third switch tube and the fourth switch tube are the same.

[0031] The second connection end of the fifth connection matching branch is connected with the first connection end of the fifth connection matching branch through the fifth direct-current isolation capacitor, the first connection end of the fifth connection matching branch is connected with the matching input end of the second capacitor-to-ground matching branch, and the first connection end of the fifth connection matching branch is connected with the drain of the third switch tube, and the source of the third switch tube is grounded.

[0032] In an optional embodiment, any one connection matching branch is formed by two microstrip lines in series, wherein the connection point between the two microstrip lines is used as the middle connection end of the corresponding connection matching branch, and the ends of the two microstrip lines away from the connection point are used as the first connection end and the second connection end of the corresponding connection matching branch, respectively.

[0033] In an optional embodiment, any one feeding branch includes a filter capacitor and a feeding microstrip line.

[0034] One end of the filter capacitor is connected with one end of the feeding microstrip line and used as the feeding input end of the corresponding feeding branch, and the other end of the filter capacitor is grounded.

[0035] The other end of the feeding microstrip line is used as the feeding output end of the corresponding feeding branch.

[0036] In an optional embodiment, any one capacitor-to-ground matching branch is implemented by using a matching capacitor, one end of the matching capacitor is used as the matching input end of the corresponding capacitor-to-ground matching branch, and the other end of the matching capacitor is grounded.

[0037] In a second aspect, the present application provides a radio frequency device, which includes at least one multi-mode reconfigurable power amplifier according to any one of the foregoing embodiments.

[0038] In this case, the beneficial effects of the embodiments of the present application can include the following:

[0039] The application integrates the input matching circuit, the driving amplifier tube and at least three power amplifier circuits with different operating frequency bands into the same power amplifier chip, so that all the power amplifier circuits can share the same input matching circuit, thereby effectively reducing the amplifier chip area, improving the chip integration, and enabling all the power amplifier circuits to correspond to a frequency band mode and perform switching operation, realizing the reconfigurable function of the power amplifier, so that switching power amplification operation between at least three frequency band modes can be integrated on the same amplifier chip, which can reduce the amplifier chip area, chip design difficulty and chip manufacturing cost while maintaining high chip integration, and adapt to the power amplifier performance requirements in different application scenarios. In addition, the application adopts the means of series and parallel fusion of switching tubes for inter-stage matching circuits and / or parallel fusion of switching tubes for output matching circuits, and the switching tubes used for realizing the circuit switching operation function can be used as the matching branch components of the corresponding matching circuits, so as to reduce the amplifier chip area and the insertion loss caused by the switching tubes, improve the chip power amplifier efficiency, and effectively improve the circuit isolation between different power amplifier circuits, avoid any frequency band mode from being affected by coupling from other frequency band modes during operation, and improve the chip performance stability.

[0040] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0042] Figure 1 The principle schematic diagram of the multi-mode reconfigurable power amplifier provided by the embodiments of the application;

[0043] Figure 2 The connection schematic diagram one of the input matching circuit and the driving amplifier tube provided by the embodiments of the application;

[0044] Figure 3 The connection schematic diagram two of the input matching circuit and the driving amplifier tube provided by the embodiments of the application;

[0045] Figure 4 The connection schematic diagram between the first switching circuit, the inter-stage matching circuit and the power amplifier tube in the same power amplifier circuit provided by the embodiments of the application;

[0046] Figure 5The connection schematic diagram between the power amplifier tube, the output matching circuit and the second switch circuit in the same power amplifier circuit provided by the embodiment of the present application.

[0047] Icon: 10 - multi-mode reconfigurable power amplifier; 11 - input matching circuit; 12 - driving amplifier tube; 13 - power amplifier circuit; 131 - first switch circuit; 132 - inter-stage matching circuit; 133 - power amplifier tube; 134 - output matching circuit; 135 - second switch circuit; 111 - microstrip filter circuit; 112 - first connection matching branch; 113 - first capacitance-to-ground matching branch; 114 - first feeding branch; 115 - first direct-current isolation capacitance; 116 - second direct-current isolation capacitance; 117 - RLC negative feedback circuit; 21 - second connection matching branch; 22 - second feeding branch; 23 - third direct-current isolation capacitance; 24 - third connection matching branch; 25 - fourth direct-current isolation capacitance; 26 - third feeding branch; 27 - RC parallel circuit; 28 - first switch tube; 29 - second switch tube; 31 - fourth connection matching branch; 32 - fourth feeding branch; 33 - fifth direct-current isolation capacitance; 34 - fifth connection matching branch; 35 - sixth direct-current isolation capacitance; 36 - second capacitance-to-ground matching branch; 37 - third switch tube; 38 - fourth switch tube; 41 - matching capacitance; 42 - filter capacitance; 43 - feeding microstrip line. DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0050] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0051] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0052] In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "set", "install", "connect", "connect" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following examples and features in the examples can be combined with each other without conflict.

[0055] Please refer to Figure 1 , Figure 1 is a schematic diagram of a multi-mode reconfigurable power amplifier 10 provided by an embodiment of the present application. In the embodiment of the present application, the multi-mode reconfigurable power amplifier 10 can realize switching power amplification operation between at least three frequency band modes on the same amplifier chip, so as to adapt to the power amplifier performance requirements in different application scenarios on the basis of maintaining high chip integration, and simultaneously reduce the amplifier chip area, chip design difficulty and chip manufacturing cost.

[0056] In the embodiment of the present application, the multi-mode reconfigurable power amplifier 10 can include an input matching circuit 11, a driving amplifier tube 12, and at least three power amplification circuits 13 operating in a switching mode. The working frequency bands of the at least three power amplification circuits 13 are different from each other, so that each power amplification circuit 13 corresponds to one frequency band mode. The matching bandwidth of the input matching circuit 11 covers the working frequency bands of the at least three power amplification circuits 13, and the input matching circuit 11 can realize the super-bandwidth matching function of at least three frequency band modes, so that the at least three power amplification circuits 13 can share the driving power provided by the driving amplifier tube 12 based on the input matching circuit 11, to ensure that any one of the at least three power amplification circuits 13 can normally operate under the corresponding driving power, and to reduce the area of the amplifier chip and improve the chip integration.

[0057] In the embodiment of the present application, the at least three power amplification circuits 13 are connected in parallel to each other. Each of the at least three power amplification circuits 13 can include a first switch circuit 131, an inter-stage matching circuit 132, a power amplifier tube 133, an output matching circuit 134, and a second switch circuit 135. The circuit on-off states of the first switch circuit 131 and the second switch circuit 135 in the same power amplification circuit 13 are consistent, to control the corresponding power amplification circuit 13 to normally or stop performing power amplification work (for example, when the first switch circuit 131 and the second switch circuit 135 in a certain power amplification circuit 13 both maintain the circuit on state, the corresponding power amplification circuit 13 normally performs power amplification work; when the first switch circuit 131 and the second switch circuit 135 in a certain power amplification circuit 13 both maintain the circuit off state, the corresponding power amplification circuit 13 stops performing power amplification work), to realize the circuit switching operation function of the corresponding power amplification circuit 13. Any first switch circuit 131 can be implemented by a MOS (Metal Oxide Semiconductor) transistor or a triode, and any second switch circuit 135 can be implemented by a MOS transistor or a triode. In one implementation of the embodiment, all first switch circuits 131 and all second switch circuits 135 are implemented by MOS transistors.

[0058] Therefore, when the multi-mode reconfigurable power amplifier 10 needs to implement power amplification operation of a certain frequency band mode, the first switch circuit 131 and the second switch circuit 135 in the power amplifier circuit 13 corresponding to the frequency band mode are controlled to be kept in the circuit conduction state, while the first switch circuit 131 and the second switch circuit 135 in other power amplifier circuits 13 are controlled to be kept in the circuit open state, so as to ensure that only the power amplifier circuit 13 corresponding to the frequency band mode normally operates, and the reconfigurable function of the multi-mode reconfigurable power amplifier 10 is realized.

[0059] In the embodiment of the present application, the signal input end (i.e., the G port) of the driving amplifier tube 12 in the input matching circuit 11 is externally connected with an input radio frequency signal (i.e., the RFIN signal in the input matching circuit 11) in the input matching circuit 11. Figure 1 In the embodiment of the present application, the signal input end (i.e., the G port) of the driving amplifier tube 12 in the input matching circuit 11 is externally connected with an input radio frequency signal (i.e., the RFIN signal in the input matching circuit 11) in the input matching circuit 11. Figure 1 In the embodiment of the present application, the signal input end (i.e., the G port) of the driving amplifier tube 12 in the input matching circuit 11 is externally connected with an input radio frequency signal (i.e., the RFIN signal in the input matching circuit 11) in the input matching circuit 11. Figure 1 In the embodiment of the present application, the signal input end (i.e., the G port) of the driving amplifier tube 12 in the input matching circuit 11 is externally connected with an input radio frequency signal (i.e., the RFIN signal in the input matching circuit 11) in the input matching circuit 11. Figure 1 In the embodiment of the present application, the signal input end (i.e., the G port) of the driving amplifier tube 12 in the input matching circuit 11 is externally connected with an input radio frequency signal (i.e., the RFIN signal in the input matching circuit 11) in the input matching circuit 11. Figure 1 In the embodiment of the present application, the signal input end (i.e., the G port) of the driving amplifier tube 12 in the input matching circuit 11 is externally connected with an input radio frequency signal (i.e., the RFIN signal in the input matching circuit 11) in the input matching circuit 11. Figure 1 In the embodiment of the present application, the signal input end (i.e., the G port) of the driving amplifier tube 12 in the input matching circuit 11 is externally connected with an input radio frequency signal (i.e., the RFIN signal in the input matching circuit 11) in the input matching circuit 11. Figure 1 In the embodiment of the present application, the signal input end (i.e., the G port) of the driving amplifier tube 12 in the input matching circuit 11 is externally connected with an input radio frequency signal (i.e., the RFIN signal in the input matching circuit 11) in the input matching circuit 11. Figure 1 In the embodiment of the present application, the signal input end (i.e., the G port) of the driving amplifier tube 12 in the input matching circuit 11 is externally connected with an input radio frequency signal (i.e., the RFIN signal in the input matching circuit 11) in the input matching circuit 11.

[0060] Therefore, the present application can realize switching power amplification operation between at least three frequency band modes on the same amplifier chip, so as to adapt to the power amplifier performance requirements in different application scenarios on the basis of maintaining high chip integration, and simultaneously reduce the amplifier chip area, chip design difficulty and chip manufacturing cost.

[0061] Alternatively, please refer to Figure 2 , Figure 2is one of connection diagrams of the input matching circuit 11 and the driving amplifier 12 provided by the embodiment of the present application. In the embodiment of the present application, the input matching circuit 11 can include a microstrip filter circuit 111, a first connection matching branch 112, a first capacitance-to-ground matching branch 113 and a first feeding branch 114. Wherein, the microstrip filter circuit 111 is used to realize a wideband matching function and process a low-frequency small-signal gain overshoot; the first connection matching branch 112 is formed by two microstrip lines (i.e. microstrip lines TL2 and TL3 in Figure 2 ) in series, a connection point between the two microstrip lines is used as a middle connection end (i.e. an MP port in Figure 2 ) of the first connection matching branch 112, and one end of each of the two microstrip lines away from the connection point is used as a first connection end (i.e. an FP port of the microstrip line TL2 in Figure 2 ) and a second connection end (i.e. an SP port of the microstrip line TL3 in Figure 2 ) of the first connection matching branch 112 respectively; the first capacitance-to-ground matching branch 113 is realized by a matching capacitance 41, one end of the matching capacitance 41 is used as a matching input end (i.e. an MI port in Figure 2 ) of the first capacitance-to-ground matching branch 113, and the other end of the matching capacitance 41 is grounded; the first feeding branch 114 includes a filter capacitance 42 and a feeding microstrip line 43, one end of the filter capacitance 42 is grounded, the other end of the filter capacitance 42 is connected with one end of the feeding microstrip line 43, and the other end of the feeding microstrip line 43 is used as a feeding output end (i.e. an EO port in Figure 2 ) of the first feeding branch 114, wherein the end of the filter capacitance 42 connected with the feeding microstrip line 43 is used as a feeding input end (i.e. an EI port in Figure 2 ) of the first feeding branch 114.

[0062] In the embodiment of the present application, a filter input end (i.e. an FI port in Figure 2 ) of the microstrip filter circuit 111 is used to externally connect the input radio frequency signal, and a filter output end (i.e. an FO port in Figure 2the first connection matching branch 112, the middle connection end of the first connection matching branch 112 is connected with the matching input end of the first capacitor-to-ground matching branch 113, and the middle connection end of the first connection matching branch 112 is connected with the feeding output end of the first feeding branch 114, wherein the feeding input end of the first feeding branch 114 is circumscribed by the first control voltage source of the driving amplifier tube 12 (i.e. the gate bias voltage source VGG1 of the driving amplifier tube 12), at this time, the second connection end of the first connection matching branch 112 can be directly connected with the signal input end of the driving amplifier tube 12 (i.e. the gate of the driving amplifier tube 12).

[0063] In an implementation form of the embodiment, the microstrip filter circuit 111 can be implemented in a T-type CLC filter structure, at this time, the microstrip filter circuit 111 can include a first direct-current isolation capacitor 115 and a second direct-current isolation capacitor 116. Wherein one end of the first direct-current isolation capacitor 115 serves as the filter input end, the other end of the first direct-current isolation capacitor 115 and one end of the second direct-current isolation capacitor 116 are connected with each other and then grounded through the microstrip line TL1, at this time, the other end of the second direct-current isolation capacitor 116 serves as the filter output end.

[0064] Optionally, please refer to Figure 3 , Figure 3 is a second connection diagram of the input matching circuit 11 and the driving amplifier tube 12 provided by the embodiment. In the embodiment, compared with the input matching circuit 11 shown in Figure 2 , the input matching circuit 11 shown in Figure 3 may further include an RLC negative feedback circuit 117, the RLC negative feedback circuit 117 is formed by a capacitor, a microstrip line and a resistor in series. One end (i.e. the capacitor included in the RLC negative feedback circuit 117 far away from the microstrip line TL4) of the RLC negative feedback circuit 117 is connected with the signal output end of the driving amplifier tube 12, the other end (i.e. the resistor included in the RLC negative feedback circuit 117 far away from the microstrip line TL4) of the RLC negative feedback circuit 117 is connected with the second connection end of the first connection matching branch 112, and the second connection end of the first connection matching branch 112 is connected with the signal input end of the driving amplifier tube 12 through the microstrip line (i.e. the microstrip line TL5 in Figure 3 Figure 3 Figure 3

[0065] Optionally, please refer to Figure 4 ,​​​Figure 4 is a connection schematic diagram between the first switch circuit 131, the inter-stage matching circuit 132 and the power amplifier tube 133 in the same power amplification circuit 13 provided by the embodiment of the present application. In the embodiment of the present application, the multi-mode reconfigurable power amplifier 10 can adopt the means of fusing the switch tube group of the first switch circuit 131 as the matching branch component of the inter-stage matching circuit 132 at each power amplification circuit 13, so that the switch tube is composed as the matching branch component of the inter-stage matching circuit 132, to reduce the amplifier chip area and the insertion loss caused by the switch tube, improve the chip power amplifier efficiency, and at the same time, improve the circuit isolation degree between different power amplification circuits 13, avoid the influence of coupling from other frequency band modes on any one frequency band mode in work, and improve the performance stability of the amplifier chip.

[0066] At this time, in any one power amplification circuit 13, the inter-stage matching circuit 132 at the power amplification circuit 13 can include a second connection matching branch 21, a second feeding branch 22, a third DC blocking capacitor 23, a third connection matching branch 24, a fourth DC blocking capacitor 25, a third feeding branch 26 and an RC parallel circuit 27, and the first switch circuit 131 at the power amplification circuit 13 can include a first switch tube 28 and a second switch tube 29. Wherein, the second connection matching branch 21 is formed by two microstrip lines (i.e. microstrip lines TL6 and TL7 in Figure 4 ) in series, the connection point between the two microstrip lines is taken as the middle connection end (i.e. the MP port of the second connection matching branch 21 in Figure 4 ) of the second connection matching branch 21, and the end of each microstrip line away from the connection point is taken as the first connection end (i.e. the FP port of the microstrip line TL6 in Figure 4 ) and the second connection end (i.e. the SP port of the microstrip line TL7 in Figure 4 ) of the second connection matching branch 21 respectively; the third connection matching branch 24 is formed by two microstrip lines (i.e. microstrip lines TL8 and TL9 in Figure 4 ) in series, the connection point between the two microstrip lines is taken as the middle connection end (i.e. the MP port of the third connection matching branch 24 in Figure 4 ) of the third connection matching branch 24, and the end of each microstrip line away from the connection point is taken as the first connection end (i.e. the FP port of the microstrip line TL8 in Figure 4 ) and the second connection end (i.e. the SP port of the microstrip line TL9 in Figure 4the second feeding branch 22 and the third feeding branch 26 each comprise a filter capacitor 42 and a feeding microstrip line 43, one end of the filter capacitor 42 is grounded, the other end of the filter capacitor 42 is connected with one end of the feeding microstrip line 43, the other end of the feeding microstrip line 43 is taken as a feeding output end (i.e. the EO port in Figure 4 ) of the second feeding branch 22 or the third feeding branch 26, wherein the one end of the filter capacitor 42 connected with the feeding microstrip line 43 is taken as a feeding input end (i.e. the EI port in Figure 4 ) of the second feeding branch 22 or the third feeding branch 26; the RC parallel circuit 27 is obtained by connecting a capacitor and a resistor in parallel.

[0067] In the embodiment of the present application, for the same power amplification circuit 13, the first connecting end of the second connecting matching branch 21 included by the power amplification circuit 13 is used for connecting the signal output end of the driving amplification tube 12, the middle connecting end of the second connecting matching branch 21 is connected with the feeding output end of the second feeding branch 22, and the feeding input end of the second feeding branch 22 is externally connected with the second control voltage source (i.e. the drain bias voltage source VDD1 of the driving amplification tube 12 in Figure 4 ) of the driving amplification tube 12. Wherein, when the second connecting matching branches 21 included by the plurality of power amplification circuits 13 respectively need to be connected with the signal output end of the driving amplification tube 12, the signal output end of the driving amplification tube 12 can be electrically connected with the first connecting end of each second connecting matching branch 21 respectively through the same microstrip line.

[0068] In the embodiment of the present application, for the same power amplification circuit 13, the second connecting end of the second connecting matching branch 21 included by the power amplification circuit 13 is connected with the drain of the first switch tube 28 (i.e. the D port of the first switch tube 28 in Figure 4 ) through the third direct-current isolation capacitor 23, the source of the first switch tube 28 (i.e. the S port of the first switch tube 28 in Figure 4 ) is connected with the first connecting end of the third connecting matching branch 24, the middle connecting end of the third connecting matching branch 24 is connected with the drain of the second switch tube 29 (i.e. the D port of the second switch tube 29 in Figure 4 ), and the source of the second switch tube 29 (i.e. the S port of the second switch tube 29 in Figure 4 ) is grounded.

[0069] In the embodiment of the present application, for the same power amplification circuit 13, the second connecting end of the third connecting matching branch 24 included by the power amplification circuit 13 is connected with the drain of the second switch tube 29 (i.e. the D port of the second switch tube 29 in Figure 4the third feeding branch 26 is connected with the first end of the RC parallel circuit 27, and the feeding output end of the third feeding branch 26 is connected with the first end of the RC parallel circuit 27, and the second end of the RC parallel circuit 27 is used for connecting the signal input end of the corresponding power amplifier tube 133. Wherein, the feeding input end of the third feeding branch 26 is connected with the first control voltage source (i.e. Figure 4 the gate bias voltage source VGG2 of the power amplifier tube 133 in the power amplifier circuit 13) of the corresponding power amplifier tube 133.

[0070] In the embodiment of the present application, the gate of the first switch tube 28 (i.e. Figure 4 the G port of the first switch tube 28) in the same power amplifier circuit 13 is connected with the switch control signal T1, so as to be turned on or turned off under the gate voltage supply of the switch control signal T1, and the gate of the corresponding second switch tube 29 (i.e. Figure 4 the G port of the second switch tube 29) is connected with the switch control signal T2, so as to be turned on or turned off under the gate voltage supply of the switch control signal T2; the first switch tube 28 and the second switch tube 29 in the same power amplifier circuit 13 are opposite in the on-off state, so that when it is needed to maintain the circuit on state of the first switch circuit 131 in the corresponding power amplifier circuit 13, the first switch tube 28 included in the first switch circuit 131 is turned on and the second switch tube 29 is turned off, or when it is needed to maintain the circuit off state of the first switch circuit 131 in the corresponding power amplifier circuit 13, the first switch tube 28 included in the first switch circuit 131 is turned off and the second switch tube 29 is turned on.

[0071] Therefore, by means of the inter-stage matching circuit 132 and the series-parallel fusion switch tube at each power amplifier circuit 13, the switch tube is used as a matching branch component of the inter-stage matching circuit 132, so as to reduce the amplifier chip area and the insertion loss caused by the switch tube, improve the chip power amplifier efficiency, and improve the circuit isolation degree between different power amplifier circuits 13, avoid the influence of coupling from other frequency band modes on any one frequency band mode in operation, and improve the performance stability of the amplifier chip.

[0072] Optionally, please refer to Figure 4 , Figure 5is a connection schematic diagram between the power amplifier tube 133, the output matching circuit 134 and the second switch circuit 135 in the same power amplifier circuit 13 provided by the embodiment of the present application. In the embodiment of the present application, the multi-mode reconfigurable power amplifier 10 can adopt the means that the output matching circuit 134 and the switch tube group of the second switch circuit 135 are connected in parallel at each power amplifier circuit 13, so that the switch tube is composed as a matching branch part of the output matching circuit 134, to reduce the amplifier chip area and the insertion loss caused by the switch tube, improve the chip power amplifier efficiency, and at the same time, improve the circuit isolation degree between different power amplifier circuits 13, avoid any one frequency band mode from being affected by the coupling from other frequency band modes when working, and improve the performance stability of the amplifier chip.

[0073] At this time, in any one power amplifier circuit 13, the output matching circuit 134 at the power amplifier circuit 13 can include a fourth connection matching branch 31, a fourth feeding branch 32, a fifth DC blocking capacitor 33, a fifth connection matching branch 34, a sixth DC blocking capacitor 35 and a second capacitor-to-ground matching branch 36, and the second switch circuit 135 at the power amplifier circuit 13 can include a third switch tube 37 and a fourth switch tube 38. Wherein, the fourth connection matching branch 31 is formed by two microstrip lines (i.e. microstrip lines TL11 and TL12 in Figure 5 ), the connection point between the two microstrip lines is taken as the middle connection end (i.e. the MP port of the fourth connection matching branch 31 in Figure 5 ), and the ends of the two microstrip lines away from the connection point are respectively taken as the first connection end (i.e. the FP port of the microstrip line TL11 in Figure 5 ) and the second connection end (i.e. the SP port of the microstrip line TL12 in Figure 5 ) of the fourth connection matching branch 31; the fifth connection matching branch 34 is formed by two microstrip lines (i.e. microstrip lines TL13 and TL14 in Figure 5 ), the connection point between the two microstrip lines is taken as the middle connection end (i.e. the MP port of the fifth connection matching branch 34 in Figure 5 ), and the ends of the two microstrip lines away from the connection point are respectively taken as the first connection end (i.e. the FP port of the microstrip line TL13 in Figure 5 ) and the second connection end (i.e. the SP port of the microstrip line TL14 in Figure 5 ) of the fifth connection matching branch 34; the fourth feeding branch 32 includes a filter capacitor 42 and a feeding microstrip line 43, one end of the filter capacitor 42 is grounded, the other end of the filter capacitor 42 is connected with one end of the feeding microstrip line 43, and the other end of the feeding microstrip line 43 is taken as the feeding output end (i.e. the feeding output end of the fourth feeding branch 32 in Figure 5The EO port in the middle), wherein the end of the filter capacitor 42 connected to the feed microstrip line 43 serves as the feed input terminal of the fourth feed stub 32 (i.e., Figure 5 The second capacitor-to-ground matching stub 36 is implemented using a matching capacitor 41, one end of which serves as the matching input terminal of the second capacitor-to-ground matching stub 36 (i.e., the EI port in the EI port); the second capacitor-to-ground matching stub 36 is implemented using a matching capacitor 41, one end of which serves as the matching input terminal of the second capacitor-to-ground matching stub 36 (i.e., the EI port in the E Figure 5 (MI port in the middle), the other end of the matching capacitor 41 is grounded.

[0074] In this embodiment, for the same power amplifier circuit 13, the first connection terminal of the fourth connection matching stub 31 is used to connect to the signal output terminal of the corresponding power amplifier tube 133. The middle connection terminal of the fourth connection matching stub 31 is connected to the feed output terminal of the fourth feed stub 32, and the feed input terminal of the fourth feed stub 32 is externally connected to the second control voltage source of the corresponding power amplifier tube 133 (i.e., Figure 5 The drain bias voltage source VDD2 of the medium power amplifier transistor 133. The second connection terminal of the fourth connection matching stub 31 is connected to the first connection terminal of the fifth connection matching stub 34 via the fifth DC blocking capacitor 33. The first connection terminal of the fifth connection matching stub 34 is connected to the matching input terminal of the second capacitor to ground matching stub 36. At the same time, the first connection terminal of the fifth connection matching stub 34 is also connected to the drain of the third switching transistor 37 (i.e., Figure 5 The third switch 37 is connected to its D port. At this time, the source of the third switch 37 (i.e., Figure 5 The S port of the third switch transistor 37 is grounded.

[0075] In this embodiment of the application, for the same power amplifier circuit 13, the intermediate connection terminal of the fifth connection matching stub 34 and the drain of the fourth switching transistor 38 (i.e., Figure 5 The fourth switch 38 is connected to its D port, and the source of the fourth switch 38 (i.e., Figure 5 The S-port of the fourth switch 38 is grounded, while the second connection terminal of the fifth matching stub 34 uses a microstrip line (i.e., ...) via the sixth DC blocking capacitor 35. Figure 5 The microstrip line TL15 outputs the amplified radio frequency signal from the corresponding power amplifier tube 133. When multiple power amplifier circuits 13 need to maintain a parallel circuit effect, the second connection terminals of the fifth connection matching stub 34 included in each of the multiple power amplifier circuits 13 must be interconnected using a microstrip line to form the radio frequency output terminal of the multi-mode reconfigurable power amplifier 10 (i.e., the signal amplified by the corresponding power amplifier tube 133). Figure 4 (RFOUT port in the middle).

[0076] In this embodiment of the application, the gate of the third switch 37 in the same power amplifier circuit 13 (i.e. Figure 5The gate of the third switch tube 37 is connected with a switch control signal T3, so that the third switch tube 37 is turned on or turned off under the gate voltage supply of the switch control signal T3. ​ The gate of the fourth switch tube 38 is connected with a switch control signal T4, so that the fourth switch tube 38 is turned on or turned off under the gate voltage supply of the switch control signal T4. The third switch tube 37 and the fourth switch tube 38 in the same power amplifier circuit 13 have the same on-off state, so that when it is needed to maintain the on state of the second switch circuit 135 in the corresponding power amplifier circuit 13, the third switch tube 37 and the fourth switch tube 38 included in the second switch circuit 135 are both turned off, or when it is needed to maintain the off state of the second switch circuit 135 in the corresponding power amplifier circuit 13, the third switch tube 37 and the fourth switch tube 38 included in the second switch circuit 135 are both turned on.

[0077] Thus, the application can reduce the amplifier chip area and the insertion loss caused by the switch tube, improve the chip power amplifier efficiency, and improve the circuit isolation degree between different power amplifier circuits 13, so as to avoid the influence of coupling from other frequency band modes on the working of any frequency band mode, and improve the performance stability of the amplifier chip.

[0078] In addition, it can be understood that when the multi-mode reconfigurable power amplifier 10 provided by the application simultaneously adopts the circuit connection scheme shown in FIGS. 8 and 9 at each power amplifier circuit 13, if it is needed to perform power amplification by the power amplifier circuit 13 of a certain frequency band mode, the circuit switching operation effect can be realized by the way of "turning on the first switch tube 28 included in the power amplifier circuit 13 but turning off the second switch tube 29, the third switch tube 37 and the fourth switch tube 38, and turning off the first switch tube 28 included in each of the other power amplifier circuits 13 but turning on the second switch tube 29, the third switch tube 37 and the fourth switch tube 38". ​ ​

[0079] In the application, the embodiment of the application further provides a radio frequency device, which includes at least one multi-mode reconfigurable power amplifier 10 as described above, and each multi-mode reconfigurable power amplifier 10 is driven by the radio frequency device to perform power amplification processing on a received radio frequency signal in a desired frequency band mode.

[0080] ​​The above merely provides various embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A multi-mode reconfigurable power amplifier, characterized by, The power amplifier comprises an input matching circuit, a driving amplifier tube and at least three power amplifier circuits operating in switching mode, wherein the operating frequency bands of the at least three power amplifier circuits are different from each other, each power amplifier circuit comprises a first switch circuit, an inter-stage matching circuit, a power amplifier tube, an output matching circuit and a second switch circuit, the circuit on-off states of the first switch circuit and the second switch circuit included in the same power amplifier circuit are consistent with each other; The signal input end of the driving amplifier tube is externally connected with an input radio frequency signal through the input matching circuit; The signal input end of each power amplifier tube is connected with the signal output end of the driving amplifier tube through an inter-stage matching circuit and a first switch circuit; The signal output end of each power amplifier tube is connected with each other after passing through an output matching circuit and a second switch circuit, and outputs a target radio frequency signal as the radio frequency output end of the power amplifier, wherein the target radio frequency signal is obtained by cooperative amplification of the input radio frequency signal, the driving amplifier tube and any one power amplifier tube.

2. The power amplifier of claim 1, wherein, The input matching circuit comprises a microstrip filter circuit, a first connection matching branch, a first capacitor-to-ground matching branch and a first feeding branch; The filter input end of the microstrip filter circuit is used for externally connecting the input radio frequency signal; The filter output end of the microstrip filter circuit is connected with the first connection end of the first connection matching branch, the middle connection end of the first connection matching branch is connected with the matching input end of the first capacitor-to-ground matching branch, and the middle connection end of the first connection matching branch is connected with the feeding output end of the first feeding branch, wherein the feeding input end of the first feeding branch is externally connected with a first control voltage source of the driving amplifier tube; The second connection end of the first connection matching branch is used for connecting the signal input end of the driving amplifier tube.

3. The power amplifier of claim 2, wherein, The input matching circuit further comprises an RLC negative feedback circuit; One end of the RLC negative feedback circuit is connected with the signal output end of the driving amplifier tube, and the other end of the RLC negative feedback circuit is connected with the second connection end of the first connection matching branch, wherein the second connection end of the first connection matching branch is connected with the signal input end of the driving amplifier tube through a microstrip line.

4. The power amplifier of claim 2, wherein, The microstrip filter circuit comprises a first direct-current isolation capacitor and a second direct-current isolation capacitor; One end of the first direct-current isolation capacitor is used as the filter input end; The other end of the first direct-current isolation capacitor and one end of the second direct-current isolation capacitor are connected with each other and grounded through a microstrip line; The other end of the second direct-current isolation capacitor is used as the filter output end.

5. The power amplifier of claim 1, wherein, In the same power amplifier circuit, the corresponding inter-stage matching circuit comprises a second connection matching branch, a second feeding branch, a third direct-current isolation capacitor, a third connection matching branch, a fourth direct-current isolation capacitor, a third feeding branch and an RC parallel circuit, and the corresponding first switch circuit comprises a first switch tube and a second switch tube; The first connection end of the second connection matching branch is used for connecting the signal output end of the driving amplifier tube; the middle connection end of the second connection matching branch is connected with the feeding output end of the second feeding branch, wherein the feeding input end of the second feeding branch is connected with the second control voltage source of the driving amplifier tube; the second connection end of the second connection matching branch is connected with the drain of the first switch tube through the third DC blocking capacitor, the source of the first switch tube is connected with the first connection end of the third connection matching branch, the middle connection end of the third connection matching branch is connected with the drain of the second switch tube, and the source of the second switch tube is grounded, wherein the on-off states of the first switch tube and the second switch tube are opposite to each other; the second connection end of the third connection matching branch is connected with the first end of the RC parallel circuit through the fourth DC blocking capacitor and then through a microstrip line, and the feeding output end of the third feeding branch is connected with the first end of the RC parallel circuit, wherein the feeding input end of the third feeding branch is connected with the first control voltage source of the corresponding power amplifier tube; the second end of the RC parallel circuit is used for connecting the signal input end of the corresponding power amplifier tube.

6. The power amplifier of claim 1, wherein, In the same power amplifier circuit, the corresponding output matching circuit comprises a fourth connection matching branch, a fourth feeding branch, a fifth DC blocking capacitor, a fifth connection matching branch, a sixth DC blocking capacitor and a second capacitor-to-ground matching branch, and the corresponding second switch circuit comprises a third switch tube and a fourth switch tube; the first connection end of the fourth connection matching branch is used for connecting the signal output end of the corresponding power amplifier tube; the middle connection end of the fourth connection matching branch is connected with the feeding output end of the fourth feeding branch, wherein the feeding input end of the fourth feeding branch is connected with the second control voltage source of the corresponding power amplifier tube; the second connection end of the fourth connection matching branch is connected with the first connection end of the fifth connection matching branch through the fifth DC blocking capacitor, the first connection end of the fifth connection matching branch is connected with the matching input end of the second capacitor-to-ground matching branch, the first connection end of the fifth connection matching branch is connected with the drain of the third switch tube, and the source of the third switch tube is grounded; the middle connection end of the fifth connection matching branch is connected with the drain of the fourth switch tube, and the source of the fourth switch tube is grounded, wherein the on-off states of the third switch tube and the fourth switch tube are the same; the second connection end of the fifth connection matching branch is connected with the first end of the RC parallel circuit through the fourth DC blocking capacitor and then through a microstrip line, and the feeding output end of the third feeding branch is connected with the first end of the RC parallel circuit, wherein the feeding input end of the third feeding branch is connected with the first control voltage source of the corresponding power amplifier tube; 7. The power amplifier of any of claims 2-6, wherein, any one connection matching branch is formed by two microstrip lines in series, wherein the connection point between the two microstrip lines is used as the middle connection end of the corresponding connection matching branch, and the ends of the two microstrip lines away from the connection point are respectively used as the first connection end and the second connection end of the corresponding connection matching branch.

8. The power amplifier of any of claims 2-6, wherein, any one feeding branch comprises a filtering capacitor and a feeding microstrip line; one end of the filtering capacitor is connected with one end of the feeding microstrip line and is used as the feeding input end of the corresponding feeding branch, wherein the other end of the filtering capacitor is grounded; the other end of the feeding microstrip line is used as the feeding output end of the corresponding feeding branch.

9. The power amplifier of any of claims 2-4 and 6, wherein, Any one of the capacitance-to-ground matching branches is implemented by a matching capacitor, one end of the matching capacitor is as a matching input end of the corresponding capacitance-to-ground matching branch, and the other end of the matching capacitor is grounded.

10. A radio frequency device, characterized by, The radio frequency device comprises at least one multi-mode reconfigurable power amplifier according to any one of claims 1-9.

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