CN208094533U - A kind of restructural power amplifier based on distributed PIN switches - Google Patents

Abstract

The utility model belongs to the communication field, in particular to a reconfigurable power amplifier based on a distributed PIN switch, comprising an input port, an input matching circuit, a distributed PIN switch, a transistor, a bias circuit, a grounding distributed switch, and an output matching circuit and output ports. The utility model adopts a distributed PIN switch, which reduces the difficulty of actual operation during plate making and testing; proposes a new reconfigurable theory, improves the overall feasibility of the power amplifier, and reduces its design difficulty; New structures interfere with each other.

Description

A Reconfigurable Power Amplifier Based on Distributed PIN Switches

technical field

The utility model belongs to the communication field, in particular to a reconfigurable power amplifier based on a distributed PIN switch.

Background technique

In recent years, with the development of wireless technology, various communication systems have emerged. Although it brings convenience to people's life, it also brings many problems. Firstly, building multiple systems is costly and redundant; secondly, switching between systems requires further processing, which is relatively difficult; finally, the joint work compatibility of various systems is poor. As the most important module in the communication system, the power amplifier determines the performance of the entire system. Reconfigurable power amplifiers can switch between different standards and frequency bands through the control of reconfigurable devices. A reconfigurable power amplifier with simple structure and good performance will promote the development of intelligent radio frequency circuits, but the current design of reconfigurable power amplifiers is relatively Complexity, mainly reflected in the following aspects: 1) The design of reconfigurable devices is difficult and has a great impact on the circuit; 2) The matching circuit structure of reconfigurable power amplifiers is relatively fixed and difficult to implement; 3) Difficulty in debugging reconfigurable power amplifiers .

Contents of the invention

Aiming at the above technical problems, the utility model provides a reconfigurable power amplifier based on a distributed PIN switch, which is characterized in that it includes: an input port, an input matching circuit, a distributed PIN switch, a transistor, a bias circuit, an output Matching circuit, grounding distribution switch and output port;

The input port, input matching circuit, transistor, bias circuit, output matching circuit and output port are sequentially connected;

The input matching circuit includes a dry microstrip line and a variable capacitor;

The main microstrip line is respectively connected to the input port, the transistor and the bias circuit; the main microstrip line is connected with several variable capacitors;

Each of the variable capacitors is composed of several capacitors;

The distributed PIN switch is a distributed parameter structure based on PIN diodes, including PIN diodes, a series resonant circuit and a parallel resonant circuit; the distributed PIN switches are respectively adapted and connected to the corresponding variable capacitors;

The number of the output matching circuits is the same as the number of the variable capacitors, and each of the output matching circuits is respectively adapted to each of the variable capacitors; the output matching circuit adopts a reconfigurable structure, and is compatible with the corresponding Grounding distribution switch connection;

The number of the grounding distributed switches is the same as the number of the output matching circuits, and is adapted to each of the output matching circuits; the grounding distributed switches are distributed parameter structures based on PIN diodes, and are grounded;

The output port is adapted and connected to the output matching circuit.

The output matching circuit includes a 90-degree microstrip line.

The number of said capacitors is 5, which are combined into 3 said variable capacitors.

The beneficial effects of the utility model:

The utility model proposes a reconfigurable power amplifier based on a distributed PIN switch, adopts a distributed PIN switch designed based on LC resonance theory, has a simple structure, reduces the difficulty of actual operation during plate making and testing, and is a reconfigurable device The design provides a reference;

The new reconfigurable theory proposed by the utility model is simpler and easier than the existing reconfigurable structure, which improves the overall feasibility of the power amplifier and reduces its design difficulty; at the same time, the new structure is eliminated by adding 90-degree microstrip lines Interference with each other provides a method for the optimization of the reconfigurable theory, which is the enrichment of the current reconfigurable theory.

The utility model has reasonable design, is easy to realize, and has good practical value.

Description of drawings

FIG. 1 is a schematic structural diagram of a reconfigurable power amplifier based on a distributed PIN switch described in a specific embodiment of the present invention.

In the figure: 1. Input port; 2. Input matching circuit; 3. Distributed PIN switch; 4. Transistor; 5. Bias circuit; 6. Output matching circuit; 7. Grounding distributed switch; 8-1. First Output port; 8-2, second output port; 8-3, third output port; 9, trunk microstrip line; 10, variable capacitor; 11, 90-degree microstrip line.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The utility model proposes a reconfigurable power amplifier based on a distributed PIN switch, as shown in Figure 1, including an input port 1, an input matching circuit 2, a distributed PIN switch 3, a transistor 4, a bias circuit 5, an output matching Circuit 6, grounding distribution switch 7 and output port;

The input port 1, the input matching circuit 2, the transistor 4, the bias circuit 5, the output matching circuit 6 and the output port are sequentially connected;

The input port 1 is used to receive a target signal;

The input matching circuit 2 includes a main microstrip line 9 and a variable capacitor 10;

The main microstrip line 9 is respectively connected to the input port 1, the transistor 4 and the bias circuit 5; the main microstrip line 9 is connected with several variable capacitors 10;

Each of the variable capacitors 10 is composed of several capacitors, corresponding to different target frequency bands;

The distributed PIN switch 3 is a distributed parameter structure based on PIN diodes, including a PIN diode 11, a series resonant circuit 12 and a parallel resonant circuit 13; the distributed PIN switch 3 is in phase with each corresponding variable capacitor 10, respectively. adapt and connect; the model of the PIN diode 11 adopts smp1322;

The access of the variable capacitor 10 is controlled by the distributed PIN switch 3, that is, under the condition of keeping the trunk microstrip line 9 unchanged, the on and off control circuits of the distributed PIN switch 3 are connected to different Capacitor, to achieve the purpose of the matching circuit working in different frequency bands, and realize the switching of different frequency bands; the distributed PIN switch 3 utilizes the characteristics that the PIN diode is approximately equivalent to inductance and capacitance before and after conduction, and uses the series resonant circuit to pair performing the design for the "on" state, and performing the design for the "off" state by using the parallel resonant circuit;

The transistor 4 and the bias circuit 5 are used to amplify the power of the signal; the model of the transistor 4 is CGH40010F;

The quantity of the output matching circuit 6 is the same as the quantity of the variable capacitor 10, and each of the output matching circuits 6 is respectively adapted to each of the variable capacitors 10; the output matching circuit 6 adopts a reconfigurable structure, and Connect with the corresponding grounding distribution switch 7;

The quantity of the grounding distributed switch 7 is the same as the quantity of the output matching circuit 6, and is adapted to each of the output matching circuits 6; the grounding distributed switch 7 is a distributed parameter structure based on a PIN diode, and grounded ;

The circuit signal is controlled by the grounding distribution switch 7, that is, the signal is grounded through the "on" state of the grounding distribution switch 7, and the signal is turned on in the "off" state to realize switching of the output matching circuit; The output matching circuit 6 includes a 90-degree microstrip line 11, which is equivalent to an inductor, and can eliminate the influence and interference between each output matching circuit 6;

The output port is adapted to and connected to the output matching circuit 7, and is used for transmitting the completed signal;

The quantity of described capacitance is 5, is combined into 3 described variable capacitors 10; Described each variable capacitor 10 can realize the switching of 1.75G, 2.1G and 2.6G frequency band, by corresponding 5 described distributed PIN switch 3 controls; wherein, the first output port 8-1 and its matching components correspond to the 2.1G frequency band; the second output port 8-2 and its matching components correspond to the 1.75G frequency band; the third output port 8- 3 and its matching components correspond to the 2.6G frequency band;

In the same embodiment, the quantity of the capacitors can be adjusted according to actual needs, so that the combined capacitor banks can realize the switching of other different frequency bands, and the distributed PIN switch 3 and the output matching circuit 6 matched therewith , grounding distribution switch 7 and the output interface are adjusted accordingly.

The method for controlling the reconfigurable power amplifier based on the above-mentioned distributed PIN switch includes the following steps:

Step 1, connecting the signal to be amplified to the input port 1 and passing it into the trunk microstrip line 9;

Step 2, converting the signal to be amplified into a target frequency band by controlling the distributed PIN switch 3;

Step 3, through the transistor 4 and the bias circuit 5, the converted signal is amplified;

Step 4, by controlling the grounding distribution switch 7, the converted and amplified signal is sent out through the corresponding output matching circuit 6 and the output port.

According to steps 1 to 4, the frequency band conversion and amplification functions of the signal to be amplified are completed.

The utility model proposes a reconfigurable power amplifier based on a distributed PIN switch, adopts a distributed PIN switch 3 designed based on LC resonance theory, has a simple structure, reduces the difficulty of actual operation during plate making and testing, and is reconfigurable Provide reference for device design;

The new reconfigurable theory proposed by the utility model is simpler and easier than the existing reconfigurable structure, which improves the overall feasibility of the power amplifier and reduces its design difficulty; at the same time, the new structure is eliminated by adding a 90-degree microstrip line 11 Interference with each other provides a method for the optimization of the reconfigurable theory, which is the enrichment of the current reconfigurable theory.

The utility model has reasonable design, is easy to realize, and has good practical value.

Claims (3)

1. A reconfigurable power amplifier based on a distributed PIN switch, characterized in that it includes: input port, input matching circuit, distributed PIN switch, transistor, bias circuit, output matching circuit, grounding type distributed switch and output port; The input port, input matching circuit, transistor, bias circuit, output matching circuit and output port are sequentially connected; The input matching circuit includes a dry microstrip line and a variable capacitor; The main microstrip line is respectively connected to the input port, the transistor and the bias circuit; the main microstrip line is connected with several variable capacitors; Each of the variable capacitors is composed of several capacitors; The distributed PIN switch is a distributed parameter structure based on PIN diodes, including PIN diodes, a series resonant circuit and a parallel resonant circuit; the distributed PIN switches are respectively adapted and connected to the corresponding variable capacitors; The number of the output matching circuits is the same as the number of the variable capacitors, and each of the output matching circuits is respectively adapted to each of the variable capacitors; the output matching circuit adopts a reconfigurable structure, and is compatible with the corresponding Grounding distribution switch connection; The number of the grounding distributed switches is the same as the number of the output matching circuits, and is adapted to each of the output matching circuits; the grounding distributed switches are distributed parameter structures based on PIN diodes, and are grounded; The output port is adapted and connected to the output matching circuit. 2. The reconfigurable power amplifier based on distributed PIN switches according to claim 1, wherein the output matching circuit includes a 90-degree microstrip line. 3. The reconfigurable power amplifier based on distributed PIN switches according to claim 1, wherein the number of the capacitors is 5, which are combined into 3 variable capacitors.