阅读说明：本技术 一种微带功率放大器 (Microstrip power amplifier ) 是由 肖飞 亓孝博 陈杨 吴超超 孙园成 于 2019-07-18 设计创作，主要内容包括：本发明提供一种微带功率放大器,其部分结构具有三阶带通滤波响应,在通带的右侧有一个传输零点,显著改善通带右侧的频率选择性；在通带外具有良好的谐波抑制,最高可以抑制到四次谐波,抑制度超过20dB；输出端口之间的隔离度超过17dB。该微带功率放大器具有突出的带外谐波抑制能力,从而有效得减小元件尺寸。该微带功率放大器具有提出的谐波抑制能力、尺寸小、便于设计等优点。(The invention provides a microstrip power amplifier, which has a partial structure with three-order band-pass filter response, wherein a transmission zero is arranged on the right side of a pass band, so that the frequency selectivity on the right side of the pass band is obviously improved; the filter has good harmonic suppression outside a passband, the maximum harmonic suppression can be up to fourth harmonic, and the suppression degree exceeds 20 dB; the isolation between the output ports exceeds 17 dB. The microstrip power amplifier has outstanding out-of-band harmonic suppression capability, thereby effectively reducing the size of elements. The microstrip power amplifier has the advantages of harmonic suppression capability, small size, convenience in design and the like.)

1. A microstrip power amplifier characterized by: the signal is input through an input feeder line (In), and the input feeder line (In) is connected to one end of the parallel coupling three-wire structure (P0); the other end of the parallel coupling three-wire structure (P0) is simultaneously connected with one end of a first terminal open-circuit branch knot (O1) and one end of a first parallel coupling two-wire structure (P1), the other end of the first parallel coupling two-wire structure (P1) is simultaneously connected with one end of a first terminal short-circuit branch knot (S1) and one end of a first transmission line knot (M1), the first terminal short-circuit branch knot (S1) is short-circuited by a first metalized through hole (H1), the other end of the first transmission line knot (M1) is connected with one end of a first capacitor (C1), the other end of the first capacitor (C1) is connected with one end of a second transmission line knot (M2), the middle of the second transmission line knot (M4642) is connected with a third transmission line knot (M3), the third transmission line knot (M3) is loaded with a first resistor (R1), a third capacitor (C635), a fourth capacitor (C4) and a fifth capacitor (C5), the third capacitor (C4) is grounded through a fourth capacitor (599) and a fifth capacitor (H599), applying a first gate voltage (Vgs1) to a third transmission line node (M3), simultaneously connecting a second resistor (R2) and a second capacitor (C2) to the other end of a second transmission line node (M2), simultaneously connecting a second resistor (R2) and a second capacitor (C2) to one end of a fourth transmission line node (M4), connecting the other end of the fourth transmission line node (M4) to one end of a first transistor (T1), connecting the other end of the first transistor (T1) to one end of a fifth transmission line node (M5), connecting a sixth transmission line node (M6) in the middle of the fifth transmission line node (M5), loading a sixth capacitor (C6), a seventh capacitor (C7) and an eighth capacitor (C8) in the middle of the sixth transmission line node (M6), applying a drain voltage (M8653) to the sixth transmission line node (M8653) through a third metalized via (H56), applying a drain voltage (Vds 8653) to the sixth transmission line node (M8653), the other end of the fifth transmission line segment (M5) is connected with one end of a ninth capacitor (C9), and the other end of the ninth capacitor (C9) is connected with one end of a seventh transmission line segment (M7); the other end of the parallel coupling three-wire structure (P0) is simultaneously connected with one end of a second open-ended branch (O2) and one end of a second parallel coupling two-wire structure (P2), the other end of the second parallel coupling two-wire structure (P2) is simultaneously connected with one end of a second short-ended branch (S2) and one end of an eighth transmission line (M8), the second short-ended branch (S2) is short-circuited by a fourth metalized through hole (H4), the other end of the eighth transmission line (M8) is connected with one end of a tenth capacitor (C10), the other end of a tenth capacitor (C10) is connected with one end of a ninth transmission line (M9), the middle of the ninth transmission line (M9) is connected with a tenth transmission line (M10), the tenth transmission line (M10) is loaded with a fourth resistor (R4), an eleventh capacitor (C11), a twelfth capacitor (C12) and a thirteenth capacitor (C13), and the eleventh capacitor (C11), A twelfth capacitor (C12) and a thirteenth capacitor (C13) are grounded through a fifth metalized via (H5), a second gate voltage (Vgs2) is applied to the tenth transmission line segment (M10), the other end of the ninth transmission line segment (M9) is simultaneously connected to a third resistor (R3) and a fourteenth capacitor (C14), the third resistor (R3) and the fourteenth capacitor (C14) are simultaneously connected to one end of the eleventh transmission line segment (M11), the other end of the eleventh transmission line segment (M11) is connected to one end of a second transistor (T2), the other end of the second transistor (T2) is connected to one end of a thirteenth transmission line segment (M13), the fourteenth segment (M14) is connected in the middle of the thirteenth transmission line segment (M13), a fifteenth capacitor (C15), a sixteenth capacitor (C5) and a seventeenth capacitor (C15) are loaded in the fourteenth transmission line segment (M14), and a fifteenth capacitor (C58573) is loaded in the middle of the fourteenth transmission line segment (M3624), The sixteenth capacitor (C16) and the seventeenth capacitor (C17) are grounded through a sixth metalized via (H6), a second drain voltage (Vds2) is applied to the fourteenth transmission line segment (M14), the other end of the thirteenth transmission line segment (M13) is connected to one end of an eighteenth capacitor (C18), and the other end of the eighteenth capacitor (C18) is connected to one end of the fifteenth transmission line segment (M15); the other end of the seventh transmission line segment (M7) and the other end of the fifteenth transmission line segment (M15) are connected to an output port (Out), so that a signal is output from the output port (Out).

2. The microstrip power amplifier according to claim 1 having a transmission zero on the right side of the passband.

3. The microstrip power amplifier according to claim 1, out-of-band rejection of more than the fourth harmonic can be achieved.

4. The microstrip power amplifier according to claim 1, based on a microstrip substrate with a relative dielectric constant of 3.66 and a substrate thickness of 0.508 mm; the first transistor (T1) and the second transistor (T2) are both GaN transistors CGH40010F, the first gate voltage (Vgs1) is set to-3V, the first drain voltage (Vds1) is set to 28V, the second gate voltage (Vgs2) is set to-6.5V, and the second drain voltage (Vds2) is set to 28V; c1 ═ 10pF, C1 ═ 5pF, C3 ═ 100pF, C4 ═ 1nF, C5 ═ 1 μ F, C6 ═ 100pF, C7 ═ 1nF, C8 ═ 1 μ F, C9 ═ 10pF, C10 ═ 10pF, C11 ═ 1 μ F, C12 ═ 1nF, C13 ═ 100pF, C14 ═ 5pF, C15 ═ 1 μ F, C16 ═ 1nF, C17 ═ 100pF, C18 ═ 10 pF; GR1 ═ 390 Ω, GR1 ═ 300 Ω, R1 ═ 47 Ω, R2 ═ 15 Ω, R3 ═ 10 Ω, R4 ═ 47 Ω; has the fourth harmonic suppression capability.

5. The microstrip power amplifier according to claim 1, comprising the partial structure: the input feed line (In) is connected to one end of the parallel coupling three-wire structure (P0); the other end of the parallel coupling three-wire structure (P0) is simultaneously connected with one end of a first terminal open-circuit branch (O1) and one end of a first parallel coupling two-wire structure (P1), the other end of the first parallel coupling two-wire structure (P1) is simultaneously connected with one end of a first terminal short-circuit branch (S1) and one end of a first transmission line branch (M1), and the first terminal short-circuit branch (S1) is short-circuited by a first metalized through hole (H1); the other end of the parallel coupling three-wire structure (P0) is simultaneously connected with one end of a second terminal open-circuit branch (O2) and one end of a second parallel coupling two-wire structure (P2), the other end of the second parallel coupling two-wire structure (P2) is simultaneously connected with one end of a second terminal short-circuit branch (S2) and one end of an eighth transmission line (M8), and the second terminal short-circuit branch (S2) is short-circuited by a fourth metalized through hole (H4); the partial structure has the characteristics of third-order band-pass filtering power division and has the capability of suppressing fourth harmonic out of band.

6. The microstrip power amplifier according to claim 5 comprising a partial structure with a center frequency at 2.0GHz and a 3dB relative bandwidth of 60%; the structural parameters are as follows: 19.70mm for l1, 7.40mm for l2, 8.8mm for l3, 16.01mm for l4, 6.14mm for l5, 23.59mm for l6, 1.10mm for w0, 0.39mm for w1, 0.20mm for w2, 2.80mm for w3, 0.40mm for w4, 0.20mm for w5, 0.59mm for w6, 390 Ω for GR1, 300 Ω for GR 1; the partial structure has third-order band-pass filtering response, a transmission zero is arranged on the right side of a pass band, out-of-band fourth harmonic suppression is achieved, the suppression degree exceeds 20dB, and the isolation degree between output ports exceeds 17 dB.

Technical Field

The invention belongs to the technical field of communication, and particularly relates to a microstrip power amplifier with good harmonic suppression capability.

background

power amplifiers are an essential part of radio frequency transmission systems. The signal passes through a radio frequency power amplifier to obtain enough radio frequency output power, and then the signal can be fed to an antenna to be transmitted. The main technical indicators of a radio frequency power amplifier are output power and efficiency. In addition, the harmonic components in its output should be as small as possible to avoid interference with other systems. In higher frequency bands such as radio frequency/microwave, the power amplifier realized based on lumped parameter elements is limited by the difficulty of realizing the device. The microstrip line has the advantages of small volume, light weight, wide use frequency band, high reliability, low manufacturing cost and the like, and is a high-frequency transmission line with wide application. The microstrip line has a distributed parameter effect, and the electrical characteristics of the microstrip line are closely related to the structural size. Therefore, in higher frequency bands such as radio frequency/microwave, a microstrip-based power amplifier is an important implementation form.

Disclosure of Invention

The purpose is to overcome the defect of insufficient harmonic suppression capability of the traditional microstrip power amplifier. The invention provides a novel microstrip power amplifier which can realize a good harmonic suppression function. Compared with the existing similar power amplifier, the power amplifier has the advantages of better harmonic suppression, size reduction and the like.

The microstrip power amplifier topological structure is shown in figure 1, and is characterized in that: the signal is input through an input feeder line (In), and the input feeder line (In) is connected to one end of the parallel coupling three-wire structure (P0); the other end of the parallel coupling three-wire structure (P0) is simultaneously connected with one end of a first terminal open-circuit branch knot (O1) and one end of a first parallel coupling two-wire structure (P1), the other end of the first parallel coupling two-wire structure (P1) is simultaneously connected with one end of a first terminal short-circuit branch knot (S1) and one end of a first transmission line knot (M1), the first terminal short-circuit branch knot (S1) is short-circuited by a first metalized through hole (H1), the other end of the first transmission line knot (M1) is connected with one end of a first capacitor (C1), the other end of the first capacitor (C1) is connected with one end of a second transmission line knot (M2), the middle of the second transmission line knot (M4642) is connected with a third transmission line knot (M3), the third transmission line knot (M3) is loaded with a first resistor (R1), a third capacitor (C635), a fourth capacitor (C4) and a fifth capacitor (C5), the third capacitor (C4) is grounded through a fourth capacitor (599) and a fifth capacitor (H599), applying a first gate voltage (Vgs1) to a third transmission line node (M3), simultaneously connecting a second resistor (R2) and a second capacitor (C2) to the other end of a second transmission line node (M2), simultaneously connecting a second resistor (R2) and a second capacitor (C2) to one end of a fourth transmission line node (M4), connecting the other end of the fourth transmission line node (M4) to one end of a first transistor (T1), connecting the other end of the first transistor (T1) to one end of a fifth transmission line node (M5), connecting a sixth transmission line node (M6) in the middle of the fifth transmission line node (M5), loading a sixth capacitor (C6), a seventh capacitor (C7) and an eighth capacitor (C8) in the middle of the sixth transmission line node (M6), applying a drain voltage (M8653) to the sixth transmission line node (M8653) through a third metalized via (H56), applying a drain voltage (Vds 8653) to the sixth transmission line node (M8653), the other end of the fifth transmission line segment (M5) is connected with one end of a ninth capacitor (C9), and the other end of the ninth capacitor (C9) is connected with one end of a seventh transmission line segment (M7); the other end of the parallel coupling three-wire structure (P0) is simultaneously connected with one end of a second open-ended branch (O2) and one end of a second parallel coupling two-wire structure (P2), the other end of the second parallel coupling two-wire structure (P2) is simultaneously connected with one end of a second short-ended branch (S2) and one end of an eighth transmission line (M8), the second short-ended branch (S2) is short-circuited by a fourth metalized through hole (H4), the other end of the eighth transmission line (M8) is connected with one end of a tenth capacitor (C10), the other end of a tenth capacitor (C10) is connected with one end of a ninth transmission line (M9), the middle of the ninth transmission line (M9) is connected with a tenth transmission line (M10), the tenth transmission line (M10) is loaded with a fourth resistor (R4), an eleventh capacitor (C11), a twelfth capacitor (C12) and a thirteenth capacitor (C13), and the eleventh capacitor (C11), A twelfth capacitor (C12) and a thirteenth capacitor (C13) are grounded through a fifth metalized via (H5), a second gate voltage (Vgs2) is applied to the tenth transmission line segment (M10), the other end of the ninth transmission line segment (M9) is simultaneously connected to a third resistor (R3) and a fourteenth capacitor (C14), the third resistor (R3) and the fourteenth capacitor (C14) are simultaneously connected to one end of the eleventh transmission line segment (M11), the other end of the eleventh transmission line segment (M11) is connected to one end of a second transistor (T2), the other end of the second transistor (T2) is connected to one end of a thirteenth transmission line segment (M13), the fourteenth segment (M14) is connected in the middle of the thirteenth transmission line segment (M13), a fifteenth capacitor (C15), a sixteenth capacitor (C5) and a seventeenth capacitor (C15) are loaded in the fourteenth transmission line segment (M14), and a fifteenth capacitor (C58573) is loaded in the middle of the fourteenth transmission line segment (M3624), The sixteenth capacitor (C16) and the seventeenth capacitor (C17) are grounded through a sixth metalized via (H6), a second drain voltage (Vds2) is applied to the fourteenth transmission line segment (M14), the other end of the thirteenth transmission line segment (M13) is connected to one end of an eighteenth capacitor (C18), and the other end of the eighteenth capacitor (C18) is connected to one end of the fifteenth transmission line segment (M15); the other end of the seventh transmission line segment (M7) and the other end of the fifteenth transmission line segment (M15) are connected to an output port (Out), so that a signal is output from the output port (Out).

The microstrip power amplifier shown in fig. 1 includes a partial structure shown in fig. 2: the input feed line (In) is connected to one end of the parallel coupling three-wire structure (P0); the other end of the parallel coupling three-wire structure (P0) is simultaneously connected with one end of a first terminal open-circuit branch (O1) and one end of a first parallel coupling two-wire structure (P1), the other end of the first parallel coupling two-wire structure (P1) is simultaneously connected with one end of a first terminal short-circuit branch (S1) and one end of a first transmission line branch (M1), and the first terminal short-circuit branch (S1) is short-circuited by a first metalized through hole (H1); the other end of the parallel coupling three-wire structure (P0) is simultaneously connected with one end of a second terminal open-circuit branch (O2) and one end of a second parallel coupling two-wire structure (P2), the other end of the second parallel coupling two-wire structure (P2) is simultaneously connected with one end of a second terminal short-circuit branch (S2) and one end of an eighth transmission line (M8), and the second terminal short-circuit branch (S2) is short-circuited by a fourth metalized through hole (H4). In fig. 2, l1, l2, l3, l4, l5, and l6 denote lengths, respectively, and w0, w1, w2, w3, w4, w5, and w6 denote line widths, respectively. The partial structure has the characteristics of third-order bandpass filtering power division, when signals are input from Port 1, the signals are equally divided and output by Port 2 and Port 3, and the signals are subjected to filtering action, and have the capability of suppressing fourth harmonic out of band.

The microstrip power amplifier has the beneficial effects that: the harmonic suppression device has outstanding harmonic suppression capability on the premise of ensuring certain efficiency and bandwidth; the size is less, the design process is simple, and the debugging is easy.

Drawings

FIG. 1: the structure schematic diagram of the microstrip power amplifier;

FIG. 2: the microstrip power amplifier comprises a part of structural schematic diagram;

fig. 3 (a): graphs of simulation and test results of | S21| and | S11| of the first embodiment;

Fig. 3 (b): simulation and test result chart of | S32| of the first embodiment;

Fig. 4 (a): the drain efficiency as a function of output power for the second embodiment;

Fig. 4 (b): the gain versus output power graph of example two.

Detailed Description

In order to embody the inventive and novel aspects of the present invention, the following embodiments are used to further carry out the technical solution and effects. In the analysis, the embodiments of the present invention will be described with reference to the drawings and specific examples, but the embodiments are not limited thereto.

Without loss of generality, the embodiment selects a common microstrip substrate with a relative dielectric constant of 3.66 and a substrate thickness of 0.508 mm.