阅读说明：本技术 一种超宽带固态功放合成电路 (ultra-wideband solid-state power amplifier synthesis circuit ) 是由 孙彪 桂盛 鲁帆 王勇 于忠吉 于 2019-11-10 设计创作，主要内容包括：本发明公开了一种超宽带固态功放合成电路。该电路包括镜像设置的两个四端口电桥网络,其中第一四端口电桥网络的输入端口B接入一个匹配单元,输入端口A接收输入微波信号,经过第一四端口电桥网络分别将信号分为从端口C和端口D输出,将两个输出信号分别经过功率合成单元进一步放大,将放大后的微波信号输入至第二四端口电桥网络的输入端口C’和输入端口D’,利用镜像可逆耦合电桥电路,将输出信号经第二四端口电桥网络耦合输出,第二四端口电桥网络的端口B’输出射频信号输出至匹配单元,端口A’直接输出微波射频信号。本发明具有电路简单、制造工艺简便、工作频率带宽宽、谐波抑制能力强的优点。(The invention discloses an ultra-wideband solid-state power amplifier synthesis circuit, which comprises two four-port bridge networks arranged in a mirror image mode, wherein an input port B of a fourth-port bridge network is connected with matching units, the input port A receives an input microwave signal, the signal is respectively divided into a port C and a port D through the fourth-port bridge network and is output from the port C and the port D, the two output signals are respectively subjected to steps of amplification through a power synthesis unit, the amplified microwave signal is input to an input port C 'and an input port D' of the second four-port bridge network, the output signal is coupled and output through the second four-port bridge network by utilizing a mirror image reversible coupling bridge circuit, a port B 'of the second four-port bridge network outputs a radio-frequency signal to the matching units, and the port A' directly outputs the microwave radio-frequency signal.)

The ultra-wideband solid-state power amplifier synthesis circuit is characterized by comprising two four-port bridge networks arranged in a mirror image mode, wherein an input port B of a th four-port bridge network is connected to matching units, an input port A receives an input microwave signal, the signal is divided into a port C and a port D through the th four-port bridge network and is output, the two output signals are respectively amplified through a power synthesis unit in a step, the amplified microwave signal is input to an input port C 'and an input port D' of the second four-port bridge network, the output signal is coupled and output through the second four-port bridge network by using a mirror image reversible coupling bridge circuit, a port B 'of the second four-port bridge network outputs a radio-frequency signal to the matching units, and the port A' directly outputs the microwave radio-frequency signal.

2. The ultra-wideband solid-state power amplifier synthesis circuit according to claim 1, wherein the th four-port bridge network realizes the coupling output of two output signals with a phase difference of 90 or 180 degrees, if the 90 degree coupling bridge network is adopted, the second harmonic signal of 3dB is suppressed, and if the 180 degree coupling bridge network is adopted, the second harmonic signal is completely suppressed.

3. The ultra-wideband solid-state power amplifier synthesis circuit according to claim 1 or 2, characterized by comprising an th matching unit (1), a th four-port bridge network (2), a th power synthesis unit (3), a second power synthesis unit (4), a second four-port bridge network (5) and a second matching unit (6).

4. The ultra-wideband solid-state power amplifier synthesis circuit according to claim 3, wherein the th matching unit (1) receives a microwave radio frequency signal of an input signal coupled through the th four-port bridge network (2) through the isolation port B, and simultaneously receives reflected signals of the port C and the port D, and performs 50 Ω matching.

5. The ultra-wideband solid-state power amplifier synthesis circuit according to claim 3, wherein the th four-port bridge network (2) receives the input microwave RF signal through the port A, outputs the input microwave RF signal to the th power synthesis unit (3) and the second power synthesis unit (4) through the port C and the port D respectively through the 90 or 180 ° bridge network, and outputs the isolated/coupled signal of the input port A to the th matching unit (1) through the port B, wherein the phase difference between the signals output by the port C and the port D is 90 ° or 180 °.

6. The ultra-wideband solid-state power amplifier synthesis circuit according to claim 3, wherein the th power synthesis unit (3) adopts amplifiers or multi-path amplification synthesis network, the signal gain value is set according to the power requirement, the th power synthesis unit (3) receives the microwave radio frequency signal output from port C of the th four-port bridge network (3), and performs linear or saturation amplification and outputs the microwave radio frequency signal to the second four-port bridge network (5);

the second power synthesis unit (4) adopts an -path amplifier or a multi-path amplification synthesis network, the signal gain value of the second power synthesis unit is set according to the power requirement, and the second power synthesis unit (4) receives the microwave radio frequency signal output by the port D of the fourth port bridge network (3) and performs linear or saturated amplification on the microwave radio frequency signal to output to the second four-port bridge network (5).

7. The ultra-wideband solid-state power amplifier synthesis circuit according to claim 3, wherein the second four-port bridge network (5) receives th power synthesis unit (3) and second power synthesis unit (4) output signals through a port D ' and a port C ', respectively, wherein an output signal from the th four-port bridge network (2) port C is input to the second four-port bridge network (5) port D ', an output signal from the th four-port bridge network (2) port D is input to the second four-port bridge network (5) port C ', and the output signal is coupled and output through a 90 or 180 ° bridge network by using a mirror image reversible coupling bridge circuit, and a microwave radio frequency signal is output to the second matching unit (6) through a port B ', and a microwave radio frequency signal is directly output through a port A.

8. The ultra-wideband solid-state power amplifier synthesis circuit according to claim 3, wherein the second matching unit (6) receives a microwave radio frequency signal entering from the port B ' of the second four-port bridge network (5), and performs 50 Ω matching on an isolation/coupling signal of the microwave radio frequency signal reflected from the port A ' of the second four-port bridge network (5) and incident signals of the ports C ' and D ' according to functional requirements, so as to ensure normal output of the port A ' of the second four-port bridge network (5).

Technical Field

The invention belongs to the power transmitting technology of a radar/electronic countermeasure system, in particular to an ultra-wideband solid-state power amplifier synthetic circuit.

Background

In recent years, with the rapid development of the fields of electronic countermeasure, phased array radar, electromagnetic compatibility (EMI) test and the like, the requirements of a high-performance and high-power interference transmission system are higher and higher, as a key component of the transmission system, the output power of a power amplifier directly determines the performance such as the working distance, the anti-interference capability and the like of a transmitter, as the third-generation semiconductor material devices such as GaAs, GaN and the like are mature, the semiconductor manufacturing process technology is continuously improved, at present, a solid-state power amplifier based on the remarkable advantages of high forbidden bandwidth, high saturated electronic offset speed, high breakdown electric field strength and the like is gradually applied to the transmission system, in order to achieve ultra-wideband and high transmission power, in addition to using a GaN chip unit with higher power, multi-path synthesis is considered, the maximum power of a 6-18 GHz power amplifier chip based on the GaN material in the market is about 10W, the additional efficiency is about 20%, even if the multi-path synthesis efficiency is close to 90%, the power consumption of the power amplifier is larger, in addition, the reflected power of the output signal of the high power device also causes thermal deposition (junction temperature of the power amplifier is too high), and the reliability of the power amplifier is a key issue of the heat dissipation performance of .

At present, the method for solving the problem of synthesis of a high-power amplifier comprises (1) realizing 1-N and N-1 multi-path synthesis by using a sector network, wherein the N-path synthesis network adopts Wilkinson or other circuit forms to realize power synthesis as shown in figure 1, (2) adopting a two-way synthesis mode of Wilkinson or other circuits, and combining two paths of synthesis networks into a multi-path to realize 1-N and N-1 multi-path synthesis as shown in figure 2.

Disclosure of Invention

The invention aims to provide circuit topology structures, low process realization difficulty, wide working frequency bandwidth and strong harmonic suppression capability.

The technical scheme for achieving the purpose of the invention is that an ultra-wideband solid-state power amplifier synthesis circuit comprises two four-port bridge networks arranged in a mirror image mode, wherein an input port B of a fourth-port bridge network is connected to matching units, an input port A receives an input microwave signal, the signal is divided into a port C and a port D through the fourth-port bridge network and is output, the two output signals are subjected to steps of amplification through a power synthesis unit respectively, the amplified microwave signal is input to an input port C 'and an input port D' of the second four-port bridge network, the output signal is coupled and output through the second four-port bridge network by using a mirror image reversible coupling bridge circuit, a radio-frequency signal is output to the matching units through a port B 'of the second four-port bridge network, and the microwave radio-frequency signal is directly output through the port A'.

, the four-port bridge network realizes the coupling output of two output signals with a phase difference of 90 or 180 degrees, if the 90-degree coupling bridge network is adopted, the second harmonic signal of 3dB is inhibited, and if the 180-degree coupling bridge network is adopted, the second harmonic signal is completely inhibited.

, the ultra-wideband solid-state power amplifier synthesis circuit includes a matching unit, a four-port bridge network, a power synthesis unit, a second four-port bridge network and a second matching unit.

, the matching unit receives the microwave rf signal coupled by the input signal through the th four-port bridge network through the isolated port B, and simultaneously receives the reflected signals from the ports C and D, and performs 50 Ω matching.

, the four-port bridge network receives the input microwave rf signal through the port a, outputs the input microwave rf signal to the th power combining unit and the second power combining unit through the port C and the port D respectively through the 90 or 180 ° bridge network, and outputs the isolated/coupled signal of the input port a to the matching unit through the port B, wherein the phase difference between the signals output by the port C and the port D is 90 or 180 °.

, the power synthesis unit adopts amplifiers or multi-path amplification synthesis networks, and the signal gain value is set according to the power requirement, the power synthesis unit receives the microwave radio frequency signal output by the four-port bridge network port C, and carries out linear or saturation amplification and outputs the microwave radio frequency signal to the second four-port bridge network;

the second power synthesis unit adopts paths of amplifiers or multi-path amplification synthesis networks, the signal gain value of the second power synthesis unit is set according to the power requirement, and the second power synthesis unit receives the microwave radio frequency signal output by the four-port bridge network port D and performs linear or saturated amplification on the microwave radio frequency signal and outputs the microwave radio frequency signal to the second four-port bridge network.

, the second four-port bridge network receives output signals of the power combining unit and the second power combining unit through a port D ' and a port C ', respectively, wherein an output signal from the port C of the fourth-port bridge network is input to the port D ' of the second four-port bridge network, an output signal from the port D of the fourth-port bridge network is input to the port C ' of the second four-port bridge network, the output signal is coupled and output through the 90 or 180 ° bridge network by using the mirror image reversible coupling bridge circuit, the microwave rf signal is output to the second matching unit through the port B ', and the microwave rf signal is directly output through the port a.

, the second matching unit receives the microwave rf signal entering from the port B ' of the second four-port bridge network, and performs 50 Ω matching on the isolation/coupling signal of the microwave rf signal reflected by the port a ' of the second four-port bridge network with the incident signals of the ports C ' and D ' according to the functional requirements, thereby ensuring the normal output of the port a ' of the second four-port bridge network.

Compared with the prior art, the ultra-wideband high-noise suppression synthesis circuit has the remarkable advantages that (1) a mirror coupling bridge is adopted to replace a Wilkinson circuit, 90-degree or 180-degree coupling is realized in a ceramic dielectric chip or air suspension mode, and in the premise of equivalent or better insertion loss, in-band noise signals, particularly in-band harmonic signals, can be suppressed by more than 2.5dB, so that steps are further improved in the in-band power synthesis efficiency of the whole power amplifier, (2) ultra-wideband power distribution/synthesis design is realized, wherein the bridge coupling circuit can meet the coupling synthesis requirements of 6-18 GHz or wider bandwidth on the basis of planar design, the coupling bridge is small in size and convenient to process, (3) low-cost design is realized, the realizability of the adopted coupling synthesis mode is high, the circuit is simple, the batch production cost is low, and (4) the function can be expanded, two-path synthesis is realized by utilizing mirror coupling, and the two-path circuit can be mixed with other synthesis circuits, a -step power circuit is further expanded, and the requirements of a large-power-tolerant matching unit can be met.

Drawings

Fig. 1 is a schematic diagram of a sector multiplexing circuit.

Fig. 2 is a schematic diagram of the principle of two-path power synthesis based on wilkinson circuit.

Fig. 3 is a schematic structural diagram of the ultra-wideband solid-state power amplifier synthesis circuit of the invention.

Fig. 4 is a schematic diagram of two-path power synthesis based on a 90 or 180 ° coupling bridge in the embodiment of the present invention.

Fig. 5 is a schematic diagram of a 90 Lange coupling bridge implementation in an embodiment of the present invention.

Detailed Description

The invention provides circuits with high synthesis efficiency of ultra-wideband solid-state power amplifiers, which comprise paired mirror coupling bridges, high-power matching loads and multiple paths of power amplifier tube cores, wherein the method adopts 90-degree or 180-degree coupling bridges, combines two-by-two through four-port bridge networks, skillfully utilizes the mirror synthesis of the coupling bridges, realizes port standing wave matching by utilizing a matching unit, and realizes the high-efficiency synthesis of microwave signals while inhibiting microwave harmonic signals in ultra-wideband power synthesis.

The whole power synthesis process comprises the following steps that , based on a four-port bridge network, an input signal is divided into two paths to be output, 90-degree or 180-degree coupling output of the two output signals can be achieved according to the coupling degree difference of the bridge network, the output signal is subjected to -step amplification through two power synthesis units, multiple harmonic signals are generated, amplified radio-frequency signals are subjected to mirror image four-port bridge network to achieve power synthesis, if the 90-degree coupling bridge network is adopted, 3dB of second harmonic signals can be theoretically inhibited, if the 180-degree coupling bridge network is adopted, the second harmonic signals can be theoretically completely inhibited, detailed below, an input port A of the four-port bridge network receives input microwave signals, the signals are divided into output signals from a port C and a port D through the four-port bridge network, the two port signals are respectively subjected to -step amplification through the power synthesis units, the amplified microwave signals are input to an input port C 'and an input port D' of the mirror image four-port bridge network, the two-time mutual coupling effect is achieved, output ports are matched with the power synthesis units, and the purpose of inhibiting the second harmonic signals is achieved, and the power synthesis efficiency is improved.

Referring to fig. 3, the ultra-wideband solid-state power amplifier synthesis circuit of the present invention includes two four-port bridge networks arranged in a mirror image, wherein an input port B of an th four-port bridge network is connected to matching units, the input port a receives an input microwave signal, the signal is divided into a port C and a port D through the th four-port bridge network, the two output signals are further amplified by a power synthesis unit step, the amplified microwave signal is input to an input port C 'and an input port D' of a second four-port bridge network, the output signal is coupled and output through the second four-port bridge network by using a mirror image reversible coupling bridge circuit, a port B 'of the second four-port bridge network outputs a radio frequency signal to a matching unit, and the port a' directly outputs a microwave radio frequency signal.

The four-port bridge network realizes the coupling output of two output signals with a phase difference of 90 or 180 degrees, if the 90-degree coupling bridge network is adopted, the second harmonic signal of 3dB is inhibited, and if the 180-degree coupling bridge network is adopted, the second harmonic signal is completely inhibited.

Specifically, the ultra-wideband solid-state power amplifier synthesis circuit comprises a matching unit 1, a fourth-port bridge network 2, a power synthesis unit 3, a second power synthesis unit 4, a second four-port bridge network 5 and a second matching unit 6, the 1 matching unit 1 receives a microwave radio-frequency signal, an input signal of which is coupled through the fourth-port bridge network 2, through an isolation port B, receives reflected signals of a port C and a port D, performs 50 Ω matching, the 3 fourth-port bridge network 2 receives an input microwave radio-frequency signal through a port a, outputs the input microwave radio-frequency signal through a port C and a port D to a 3 rd power synthesis unit 3 and a second power synthesis unit 4 through a 90 or 180 ° bridge network, outputs an isolated/coupled signal of an input port a to a 5 matching unit 1 through a port B, outputs a signal through a port C and a port D to a power synthesis unit 3 and a power synthesis unit , outputs a linear amplified signal through a port B3 ', a second power synthesis unit 3 ', a power synthesis unit, outputs a linear amplified signal input signal through a port B and a port B ', a power synthesis unit 3 ', a power synthesis unit, outputs a linear amplification signal input signal through a port B, a linear amplification unit, a power synthesis unit, a port B ', a linear amplification unit, a power synthesis unit, a linear amplification unit, a power synthesis unit, a power.

In addition, different substrate materials or structure realization modes are adopted, the transmission loss of the four-port bridge network can be reduced in steps, harmonic suppression and low-loss design of the network are integrated, and the synthesis efficiency of two paths of power can be effectively improved.

The invention is further described in detail in connection with the figures and the embodiments.