Power divider applied to satellite-borne communication chip

Abstract

The invention belongs to the technical field of integrated circuits, and particularly relates to an anti-irradiation power divider applied to a satellite-borne wireless communication system. The circuit structure comprises an anti-radiation power divider core circuit, a power detection circuit, an analog-to-digital converter and a control module. An input signal is input to the anti-radiation power divider core circuit, and two groups of voltage signals are generated and output to the power detection circuit. The power detection circuit processes the received voltage signal, outputs a processing result to the analog-to-digital converter, receives an instruction of the control module circuit, and outputs two groups of final signals; the analog-to-digital converter converts a processing result output by the power detection circuit into a digital signal and outputs the digital signal to the control module; and the control module performs judgment according to the input digital signal, generates a control signal for controlling the working mode of the anti-irradiation power divider core circuit, and generates a control signal for controlling the power detection circuit and the analog-to-digital converter. Wherein the core circuit architecture of the anti-radiation power divider is two Wilkinson power dividers, and the actually working power divider branches are switched through a switch. By utilizing the structure, the probability of circuit failure caused by space irradiation can be obviously reduced, and the anti-irradiation performance and the stability of a satellite-borne wireless communication system are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a power divider. Background Art

[0002] A power divider is a basic electronic component used in wireless communications, RF signal processing and broadband systems. Its main function is to evenly or unevenly distribute the energy of the input signal to multiple output ports to achieve signal multiplexing or reasonable power distribution.

[0003] At present, the main types of power dividers include microstrip power dividers, cavity power dividers, broadband power dividers and filter-type power dividers. Among them, the Wilkinson power divider is a classic power divider, which uses a simple resistor network design to achieve balanced branching on a 75 ohm (or a combination of 50 ohms and 37.5 ohms) signal transmission line, and has many advantages such as high isolation, low insertion loss, simple structure, and easy implementation.

[0004] With the advancement of science and technology and the continuous expansion of communication application fields, people have put forward more requirements for power dividers. In the field of aerospace, the working environment of satellite-borne chips is the space with strong radiation. The circuit modules in the chips are affected by radiation, with a higher probability of failure and a shorter expected life. Therefore, in order to improve the performance of satellite-borne chips, it is necessary to effectively use chip anti-radiation technology to improve system stability and reliability. Summary of the invention

[0005] The purpose of the present invention is to provide an anti-radiation power divider used in a satellite communication chip.

[0006] The power divider circuit structure proposed by the present invention includes: an anti-radiation power divider core circuit, a power detection circuit, an analog-to-digital converter and a control module; an input signal is input into the anti-radiation power divider core circuit, two sets of voltage signals are generated and output to the power detection circuit; the power detection circuit processes the signals received from the anti-radiation power divider core and the control module circuit, outputs the processing results to the analog-to-digital converter and outputs the final two sets of voltage signals; the analog-to-digital converter converts the processing results output by the power detection circuit into digital signals and outputs them to the control module circuit; the control module circuit makes judgments based on the received signals and generates control signals for controlling the anti-radiation power divider core circuit, the power detection circuit and the analog-to-digital converter.

[0007] In the present invention, the core circuit of the radiation-resistant power divider is composed of two completely identical Wilkinson power dividers and two single-pole double-throw digital switches; the two Wilkinson power dividers back up each other, and the output signals are controlled by the digital switches. In actual normal operation, only one power divider is used; the digital switch will switch the actual working power divider branch according to the signal of the control module in the system, thereby greatly improving the radiation resistance and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the radiation-resistant power divider of the present invention.

[0009] Figure 2 This is a schematic diagram of the core circuit of the radiation-resistant power divider. DETAILED DESCRIPTION

[0010] The present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, the same elements are represented by similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale. In addition, some well-known parts may not be shown in the drawings.

[0011] Many specific details of the present invention are described below, such as device structure, materials, dimensions, processing technology and techniques, so as to more clearly understand the present invention. However, as those skilled in the art will appreciate, the present invention may be implemented without following these specific details.

[0012] Figure 1 A schematic structural diagram of the satellite-borne radiation-resistant power divider of the present invention is shown.

[0013] like Figure 1 As shown, the satellite-borne radiation-resistant power divider 100 of the present invention includes a radiation-resistant power divider core circuit 101, a power detection circuit 102, a control module 103 and an analog-to-digital converter 104. The external input signal V in As the input signal of the radiation-resistant power divider core circuit 101, the output signal V op '、V on ' is transmitted to the power detection circuit 102, and the power detection circuit 102 outputs V op 、V on As the output signal of the entire power divider circuit, the power detection circuit 102 outputs pdout to the analog-to-digital converter 104, the analog-to-digital converter 104 outputs adout to the control module 103, the control module 103 outputs Ctrl<1:3> to the radiation-resistant power divider core circuit 101, outputs ctrl3 to the power detection circuit 102, and outputs ctrl4 to the analog-to-digital converter 104.

[0014] Figure 2 A schematic diagram of the core circuit of the radiation-resistant power divider in the present invention is shown.

[0015] like Figure 2As shown, the core circuit of the radiation-resistant power divider includes three digitally controlled switches S1-S3 and two branches that serve as backup for each other; the first branch includes five transmission lines L1-L5 and a jumper resistor R1, and the second branch includes five transmission lines L6-L10 and a jumper resistor R2; when the core circuit of the radiation-resistant power divider receives a control signal to select the first branch, the switch S1 is connected to the fixed end 1.1, the switch S2 is connected to the fixed end 2.1, and the switch S3 is connected to the fixed end 3.1; when the core circuit of the radiation-resistant power divider receives a control signal to select the second branch, the switch S1 is connected to the fixed end 1.2, switch S2 is connected to the fixed end 2.2, and switch S3 is connected to the fixed end 3.2; the input signal is connected to the moving end of switch S1, and the two sets of output signals are connected to the moving end of switch S2 and the moving end of switch S3 respectively; in the first branch, one end of the transmission line L1 is connected to the fixed end 1.1 of switch S1, and the other end is connected to the transmission lines L2 and L4 at the same time; one end of the transmission line L2 is connected to the transmission line L1 and the transmission line L4 at the same time, and the other end is connected to the transmission line L3 and the jumper resistor R1 at the same time; one end of the transmission line L3 is connected to the transmission line L2 and the jumper resistor R1 at the same time, and the other end is connected to the switch The fixed end 2.1 of switch S2, one end of transmission line L4 is connected to transmission line L1 and transmission line L2 at the same time, and the other end is connected to transmission line L5 and jumper resistor R1 at the same time. One end of transmission line L5 is connected to transmission line L4 and jumper resistor R1 at the same time, and the other end is connected to fixed end 3.1 of switch S3. One end of jumper resistor R1 is connected to transmission lines L2 and L3 at the same time, and the other end is connected to transmission lines L4 and L5 at the same time. In the second branch, one end of transmission line L6 is connected to fixed end 1.2 of switch S1, and the other end is connected to transmission lines L7 and L9 at the same time. One end of transmission line L7 is connected to transmission line L6 at the same time. and transmission line L9, and the other end is connected to transmission line L8 and jumper resistor R2 at the same time. One end of transmission line L8 is connected to transmission line L7 and jumper resistor R2 at the same time, and the other end is connected to fixed end 2.2 of switch S2. One end of transmission line L9 is connected to transmission line L6 and transmission line L7 at the same time, and the other end is connected to transmission line L10 and jumper resistor R2 at the same time. One end of transmission line L10 is connected to transmission line L9 and jumper resistor R2 at the same time, and the other end is connected to fixed end 3.2 of switch S3. One end of jumper resistor R2 is connected to transmission lines L7 and L8 at the same time, and the other end is connected to transmission lines L9 and L10 at the same time. The core of this circuit structure is that the control signal can change the state of switches S1, S2 and S3, and the two branches in the core circuit are backed up by each other and only one branch is actually working, and the output end only outputs the signal of the branch that is actually working. When space radiation causes a branch that is working to fail, the control signal can change the switch state to make the circuit that is actually working switch to the circuit of another branch, thereby greatly improving the stability and reliability of the system.

Claims

1. A power divider used in a satellite communication chip, the circuit structure of which comprises: The core circuit of the radiation-resistant power splitter, the power detection circuit, the analog-to-digital converter and the control module. The input signal is input to the core circuit of the radiation-resistant power splitter, generating two voltage signals to be output to the power detection circuit; the power detection circuit processes the voltage signal it receives, outputs the processing result to the analog-to-digital converter, and receives the instruction of the control module circuit to output the final two sets of voltage signals; The analog-to-digital converter converts the processing result output by the power detection circuit into a digital signal and outputs it to the control module; the control module makes a judgment based on the input digital signal, generates a control signal for controlling the working mode of the core circuit of the radiation-resistant power divider, and generates a control signal for controlling the power detection circuit and the analog-to-digital converter.

2. The power divider for satellite communication chip according to claim 1, characterized in that: The core circuit of the radiation-resistant power divider consists of two identical Wilkinson power dividers and two single-pole double-throw digital switches; the two Wilkinson power dividers back up each other, and the output signals are controlled by the digital switches. In actual normal operation, only one power divider is used; the digital switch will switch the actual working power divider branch according to the signal of the control module in the system, thereby greatly improving the system's radiation resistance and stability.

3. The power divider for satellite communication chip according to claim 2, characterized in that: The core circuit of the anti-radiation power divider includes three digitally controlled switches S1-S3 and two branches that serve as backup for each other; the first branch includes five transmission lines L1-L5 and a jumper resistor R1, and the second branch includes five transmission lines L6-L10 and a jumper resistor R2; when the core circuit of the anti-radiation power divider receives a control signal to select the first branch, the switch S1 is connected to the fixed end 1.1, the switch S2 is connected to the fixed end 2.1, and the switch S3 is connected to the fixed end 3.1; when the core circuit of the anti-radiation power divider receives a control signal to select the second branch, the switch S1 is connected to the fixed end 1.1, the switch S2 is connected to the fixed end 2.1, and the switch S3 is connected to the fixed end 3.

1. The first branch has one end of the transmission line L1 connected to the fixed end 1.1 of the switch S1, and the other end connected to the transmission lines L2 and L4 at the same time; one end of the transmission line L2 is connected to the transmission line L1 and the transmission line L4 at the same time, and the other end is connected to the transmission line L3 and the jumper resistor R1 at the same time; one end of the transmission line L3 is connected to the transmission line L2 and the jumper resistor R1 at the same time, and the other end is connected to the switch S 2, one end of the transmission line L4 is connected to the transmission line L1 and the transmission line L2, and the other end is connected to the transmission line L5 and the jumper resistor R1. One end of the transmission line L5 is connected to the transmission line L4 and the jumper resistor R1, and the other end is connected to the fixed end 3.1 of the switch S3. One end of the jumper resistor R1 is connected to the transmission lines L2 and L3, and the other end is connected to the transmission lines L4 and L5. In the second branch, one end of the transmission line L6 is connected to the fixed end 1.2 of the switch S1, and the other end is connected to the transmission lines L7 and L9. One end of the transmission line L7 is connected to the transmission lines L6 and Transmission line L9, the other end is connected to transmission line L8 and jumper resistor R2 at the same time, one end of transmission line L8 is connected to transmission line L7 and jumper resistor R2 at the same time, and the other end is connected to fixed end 2.2 of switch S2, one end of transmission line L9 is connected to transmission line L6 and transmission line L7 at the same time, and the other end is connected to transmission line L10 and jumper resistor R2 at the same time, one end of transmission line L10 is connected to transmission line L9 and jumper resistor R2 at the same time, and the other end is connected to fixed end 3.2 of switch S3, one end of jumper resistor R2 is connected to transmission lines L7 and L8 at the same time, and the other end is connected to transmission lines L9 and L10 at the same time. The core of this circuit structure is that the control signal can change the state of switches S1, S2 and S3, and the two branches in the core circuit are backed up by each other and only one branch is actually working, and the output end only outputs the signal of the branch that is actually working. When space radiation causes a branch that is working to fail, the control signal can change the switch state to make the circuit that is actually working switch to the circuit of another branch, thereby greatly improving the stability and reliability of the system.

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