Phase shifter applied to satellite-borne communication chip

Abstract

The invention belongs to the technical field of integrated circuits, and particularly relates to an anti-radiation switch linear phase shifter applied to a satellite-borne wireless communication system. The circuit structure of the phase shifter comprises an anti-radiation phase shifter core circuit, a phase detection circuit, an analog-to-digital converter and a control module circuit, an input signal is input to the anti-radiation phase shifter core circuit, and a phase shift signal is generated and output to the phase detection circuit. The phase detection circuit processes the received phase shift signal, outputs a processing result to the analog-to-digital converter, receives an instruction of the control module circuit, and outputs a final phase shift signal; the analog-to-digital converter converts a processing result output by the phase detection circuit into a digital signal and outputs the digital signal to the control module circuit; the control module circuit performs judgment according to the input digital signal, generates a control signal for controlling the working mode of the anti-radiation phase shifter core circuit, and generates a control signal for controlling the phase detection circuit and the analog-to-digital converter; the core circuit architecture of the radiation-proof phase shifter is a two-way switch linear phase shifter, the actually working phase shifter branch is switched through a switch, and by applying the structure, the circuit failure probability caused by space radiation can be remarkably reduced, and the radiation-proof performance and the stability of the circuit are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of integrated circuits, and particularly relates to a phase shifter. Background Art

[0002] A phase shifter is an important component in a phased array transceiver system and is mainly used in multi-array signal processing systems. The phase shifter can control the output phase of a signal. Thus, by using the principle of wave superposition, the signals received by multiple arrays are orderly superimposed to change the direction of the beam, form a narrow beam in the target direction, and enable the receiving system to complete electronic scanning of beams in different directions without mechanical rotation.

[0003] Currently, the widely adopted phase shifter architectures include passive reflective, switch-line type, loaded linear, and active vector synthesis type. The significant advantage of a passive phase shifter is that it can achieve extremely high phase shift accuracy within a small frequency range and has almost no power consumption. Among them, the switch-line type phase shifter has a simple principle and an easy-to-implement structure, making it a suitable architecture choice in many application scenarios. This phase shifter circuit is composed of multiple switches and multiple sections of microstrip lines or transmission lines, and uses the different phase changes of signals passing through different lengths of transmission paths to achieve the phase shift function.

[0004] Currently, the increasingly extensive communication application fields have put forward more requirements for phased array transceiver systems and phase shifter circuits. In the aerospace field, the working environment of spaceborne chips is the space with strong radiation. The circuit modules in the chips are affected by radiation, having a higher failure probability and a shorter expected lifespan. Therefore, it is imperative to pay attention to the special working environment of spaceborne chips in the aerospace field, study chip anti-radiation technology, and improve the stability and reliability of the system. Summary of the Invention

[0005] The object of the present invention is to propose an anti-radiation switch-line type phase shifter applied to spaceborne communication chips.

[0006] The phase shifter proposed by the present invention has a circuit structure including: an anti-radiation phase shifter core circuit, a phase detection circuit, an analog-to-digital converter, and a control module circuit; an input signal is input to the anti-radiation phase shifter core circuit to generate a phase-shifted signal and output it to the phase detection circuit; the phase detection circuit processes the received phase-shifted signal, outputs the processing result to the analog-to-digital converter, and receives an instruction from the control module circuit to output the final phase-shifted signal; the analog-to-digital converter converts the processing result output by the phase detection circuit into a digital signal and outputs it to the control module circuit; the control module circuit makes a judgment based on the received signal, generates a control signal for controlling the anti-radiation phase shifter core circuit, and generates control signals for controlling the phase detection circuit and the analog-to-digital converter.

[0007] In the present invention, the core circuit of the radiation-resistant phase shifter consists of two switched-line phase shifters and two numerically controlled switches; the numerically controlled switches are used to switch the actually working phase shifter branches; the two switched-line phase shifters are exactly the same, and each phase shifter adopts the basic structure of a switched-line phase shifter, which is composed of four switches and four transmission lines to achieve phase shifting operation.

[0008] The phase shifter designed in the present invention includes two switched-line phase shifter circuits that are backup to each other and can be switched under system control, thereby significantly reducing the probability of circuit failure caused by space radiation, and thus enhancing the radiation resistance performance and stability of the overall circuit and system. Brief Description of the Drawings

[0009] Figure 1 It is a schematic structural diagram of the radiation-resistant switched-line phase shifter of the present invention.

[0010] Figure 2 It is a schematic diagram of the core circuit of the radiation-resistant phase shifter. Detailed Description of the Invention

[0011] The present invention will be described in more detail below with reference to the drawings. In each drawing, the same elements are denoted by similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale. In addition, some well-known parts may not be shown in the figures.

[0012] Many specific details of the present invention, such as the structure, materials, dimensions, processing techniques and technologies of the device, are described below in order to understand the present invention more clearly. However, as those skilled in the art can understand, the present invention can be implemented without these specific details.

[0013] Figure 1 It shows a schematic structural diagram of the spaceborne radiation-resistant switched-line phase shifter of the present invention.

[0014] As Figure 1 shown, the spaceborne radiation-resistant switched-line phase shifter 100 in the present invention includes a radiation-resistant phase shifter core circuit 101, a phase detection circuit 102, a control module 103, and an analog-to-digital converter 104. The external input signal Vi serves as the input signal of the radiation-resistant phase shifter core circuit 101, the output Vo' of the radiation-resistant phase shifter core circuit 101 is fed to the phase detection circuit 102, the output Vo of the phase detection circuit 102 serves as the output signal of the entire phase shifter circuit, the output pdout of the phase detection circuit 102 is fed to the analog-to-digital converter 104, the output adout of the analog-to-digital converter 104 is fed to the control module 103, the control module 103 outputs Ctrl<1:2> to the radiation-resistant phase shifter core circuit 101, the control module 103 outputs Ctrl3 to the phase detection circuit 102, and the control module 103 outputs Ctrl4 to the analog-to-digital converter 104.

[0015] Figure 2 The schematic diagram of the core circuit of the anti-irradiation phase shifter in the present invention is shown.

[0016] As Figure 2 shown, the core circuit 101 of the anti-irradiation phase shifter includes a total of 10 single-pole double-throw switches S1-10 and 8 transmission lines L1-L8. The input signal Vi is input to the moving end of switch S1, and the moving end of switch S2 is the output signal; when the first-branch phase shifter is selected, switch S1 is connected to the fixed end 1.1, and switch S2 is connected to the fixed end 2.1; when the second-branch phase shifter is selected, switch S1 is connected to the fixed end 1.2, and switch S2 is connected to the fixed end 2.2; the first-branch phase shifter circuit is composed of switches S3-6 and transmission lines L1, 2, 5, 6; the fixed end 1.1 of switch S1 is connected to the moving end of switch S3, the two ends of transmission line L5 are respectively connected to the fixed end 3.1 of switch S3 and the fixed end 4.1 of switch S4, the two ends of transmission line L1 are respectively connected to the fixed end 3.2 of switch S3 and the fixed end 4.2 of switch S4, the moving end of switch S4 is connected to the moving end of switch S5, the two ends of transmission line L6 are respectively connected to the fixed end 5.1 of switch S5 and the fixed end 6.1 of switch S6, the two ends of transmission line L2 are respectively connected to the fixed end 5.2 of switch S5 and the fixed end 6.2 of switch S6, and the moving end of switch S6 is connected to the fixed end 2.1 of switch S2; the second-branch phase shifter circuit is composed of switches S7-10 and transmission lines L3, 4, 7, 8; the switching between the two branches of the phase shifter circuit is realized through switches S1 and S2, and the switching of switches S1 and S2 is controlled by the control module 103. The fixed end 1.2 of switch S1 is connected to the moving end of switch S7, the two ends of transmission line L3 are respectively connected to the fixed end 7.1 of switch S7 and the fixed end 8.1 of switch S8, the two ends of transmission line L7 are respectively connected to the fixed end 7.2 of switch S7 and the fixed end 8.2 of switch S8, the moving end of switch S8 is connected to the moving end of switch S9, the two ends of transmission line L4 are respectively connected to the fixed end 9.1 of switch S9 and the fixed end 10.1 of switch S10, the two ends of transmission line L8 are respectively connected to the fixed end 9.2 of switch S9 and the fixed end 10.2 of switch S10, and the moving end of switch S10 is connected to the fixed end 2.2 of switch S2.

Claims

1. A phase shifter applied to a spaceborne communication chip, characterized in that, The circuit structure includes: an anti-radiation phase shifter core circuit, a phase detection circuit, an analog-to-digital converter, and a control module circuit; an input signal is input to the anti-radiation phase shifter core circuit, and a phase-shifted signal is generated and output to the phase detection circuit; the phase detection circuit processes the received phase-shifted signal, outputs the processing result to the analog-to-digital converter, and receives instructions from the control circuit to output the final phase-shifted signal; the analog-to-digital converter converts the processing result output by the phase detection circuit into a digital signal and outputs it to the control module circuit; the control module circuit makes a judgment based on the received signal, generates a control signal for controlling the anti-radiation phase shifter core circuit, and generates control signals for controlling the phase detection circuit and the analog-to-digital converter.

2. The phase shifter applied to the spaceborne communication chip according to claim 1, characterized in that, The anti-radiation phase shifter core circuit consists of two switched-line type phase shifters and two numerically controlled switches; the two switched-line type phase shifters are exactly the same, and each phase shifter adopts a basic switched-line type phase shifter structure, which is composed of four switches and four transmission lines; the numerically controlled switch is used to switch the actually working phase shifter branch. The two phase shifters are backup to each other and are switched by the system control, so as to effectively reduce the probability of the overall circuit failure and improve the anti-radiation performance and stability of the system.

3. The phase shifter applied to the spaceborne communication chip according to claim 2, wherein The anti-radiation phase shifter core circuit includes a total of 10 single-pole double-throw switches S1 - 10 and 8 transmission lines L1 - L8; when the circuit receives a control signal to select the first branch, switch S1 is connected to the fixed terminal 1.1, and switch S2 is connected to the fixed terminal 2.1; when receiving a control signal to select the second branch, switch S1 is connected to the fixed terminal 1.2, and switch S2 is connected to the fixed terminal 2.2; the input signal is connected to the moving terminal of switch S1; the first branch is composed of switches S3 - 6 and transmission lines L1, 2, 5, 6; the fixed terminal 1.1 of switch S1 is connected to the moving terminal of switch S3, the two ends of transmission line L5 are respectively connected to the fixed terminal 3.1 of switch S3 and the fixed terminal 4.1 of switch S4, the two ends of transmission line L1 are respectively connected to the fixed terminal 3.2 of switch S3 and the fixed terminal 4.2 of switch S4, the moving terminal of switch S4 is connected to the moving terminal of switch S5, the two ends of transmission line L6 are respectively connected to the fixed terminal 5.1 of switch S5 and the fixed terminal 6.1 of switch S6, the two ends of transmission line L2 are respectively connected to the fixed terminal 5.2 of switch S5 and the fixed terminal 6.2 of switch S6, the moving terminal of switch S6 is connected to the fixed terminal 2.1 of switch S2; the second branch is composed of switches S7 - 10 and transmission lines L3, 4, 7, 8; the fixed terminal 1.2 of switch S1 is connected to the moving terminal of switch S7, the two ends of transmission line L3 are respectively connected to the fixed terminal 7.1 of switch S7 and the fixed terminal 8.1 of switch S8, the two ends of transmission line L7 are respectively connected to the fixed terminal 7.2 of switch S7 and the fixed terminal 8.2 of switch S8, the moving terminal of switch S8 is connected to the moving terminal of switch S9, the two ends of transmission line L4 are respectively connected to the fixed terminal 9.1 of switch S9 and the fixed terminal 10.1 of switch S10, the two ends of transmission line L8 are respectively connected to the fixed terminal 9.2 of switch S9 and the fixed terminal 10.2 of switch S10, the moving terminal of switch S10 is connected to the fixed terminal 2.2 of switch S2; the moving terminal of switch S2 is used as the output.

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