Satellite-borne radiation-proof reflective phase shifter

Abstract

The invention belongs to the technical field of integrated circuits, and particularly relates to an anti-radiation reflective 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-path reflection-type phase shifter, the actually working phase shifter branches are switched through a numerical control 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, and 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] The architectures of phase shifters include passive reflection type, switch line type, loaded line type, and active vector synthesis type, etc. The passive phase shifter can obtain extremely high phase shift accuracy within a small frequency range and has almost no power consumption, and has higher cost performance in many application scenarios. Among them, the reflection type phase shifter obtains output signals with different phase changes by changing the impedance of the reflection load; its structure is simple, easy to implement, and can generate relatively accurate phase shift signals within 180°; it can also be paired with phase shifters of other structures, such as switch line type phase shifters, to achieve higher performance phase shift operations.

[0004] At present, 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 irradiation. The circuit modules in the chips are affected by irradiation, with a higher failure probability and a shorter expected life. Therefore, it is imperative to pay attention to the special working environment of spaceborne chips in the aerospace field, study chip anti-irradiation technology, and improve the stability and reliability of the system. Summary of the Invention

[0005] The purpose of the present invention is to propose an anti-irradiation reflection type phase shifter applied to spaceborne communication chips.

[0006] The phase shifter proposed by the present invention has a circuit structure including: an anti-irradiation 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-irradiation phase shifter core circuit to generate a phase shift signal and output it to the phase detection circuit; the phase detection circuit processes the received phase shift signal, outputs the processing result to the analog-to-digital converter, and receives instructions from the control module circuit to output the final phase shift 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-irradiation 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 anti-radiation phase shifter is composed of two reflection-type phase shifters; the structures of each phase shifter are exactly the same, including 2 numerically controlled single-pole double-throw switches, 4 load impedances with variable impedances, and share the same Lange coupler; the numerically controlled switches in the circuit are used to switch the load impedance actually connected to the circuit to change the working mode of the overall phase shifter.

[0008] The phase shifter designed in the present invention generally includes two mutually backup reflection-type phase shifters, has 4 working modes, and can be switched under system control, thereby significantly reducing the probability of circuit failure caused by space radiation, and thus enhancing the anti-radiation 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 anti-radiation reflection-type phase shifter of the present invention.

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

[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 the sake of 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 are described below, such as the structure, material, size, processing technology and technique of the device, 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 anti-radiation reflection-type phase shifter of the present invention.

[0014] As Figure 1As shown in the figure, the spaceborne radiation-hardened reflective phase shifter 100 in the present invention includes a radiation-hardened 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-hardened phase shifter core circuit 101. The power supply voltage VDD is connected to the radiation-hardened phase shifter core circuit 101. The output Vo' of the radiation-hardened phase shifter core circuit 101 is transmitted 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 transmitted to the analog-to-digital converter 104. The output adout of the analog-to-digital converter 104 is transmitted to the control module 103. The control module 103 outputs Ctrl<1:2> and transmits it to the radiation-hardened phase shifter core circuit 101. The control module 103 outputs Ctrl3 and transmits it to the phase detection circuit 102. The control module 103 outputs Ctrl4 and transmits it to the analog-to-digital converter 104.

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

[0016] As Figure 2 shown, the radiation-hardened phase shifter core circuit 101 includes a total of: 2 single-pole double-throw switches S1-2, 4 load impedances Z L 1-4 with variable impedance, and 1 Lange coupler 105; the input signal Vi is transmitted to port 1 of the Lange coupler 105, and a phase-shifted signal Vo' is generated at port 4 of the Lange coupler 105; port 2 and port 3 of the Lange coupler are respectively connected to the moving ends of switch S1 and switch S2; the fixed end 1.1 of switch S1 is connected to load impedance Z L 1, and the other end of load impedance Z L 1 is grounded; the fixed end 1.2 of switch S1 is connected to load impedance Z L 3, and the other end of load impedance Z L 3 is grounded; the fixed end 2.1 of switch S2 is connected to load impedance Z L 2, and the other end of load impedance Z L 2 is grounded; the fixed end 2.2 of switch S2 is connected to load impedance Z L 4, and the other end of load impedance Z L 4 is grounded; the switching of switches S1-2 is controlled by the control signal output by the control module, so as to select the load impedance connected to ports 2 and 3 of the Lange coupler according to specific situations. For example, Z L 1 can be paired with Z L 2 or Z L 4 for use, and Z L 3 can also be paired with Z L 2 or Z LThey are used in pairs of four, resulting in four work modes that can be flexibly switched. With this structure, the flexibility and redundancy of the phase shifter circuit can be greatly improved, thereby enhancing the radiation resistance performance and stability of the overall circuit and system.

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 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.

2. The phase shifter applied to the spaceborne communication chip according to claim 1, wherein The anti-radiation phase shifter core circuit is composed of two-way reflective phase shifters; the structures of the two-way reflective phase shifters are exactly the same, and each uses a basic reflective architecture; the two phase shifters share the same Lange coupler; the digital control switch included in the circuit is used to switch the actually working phase shifter branch; the two phase shifters are backup to each other, have 4 different working modes, and can be switched by system control, so as to effectively reduce the overall circuit failure probability 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, characterized in that, The core circuit of the radiation-resistant phase shifter includes two single-pole double-throw switches S1-2, four variable impedance load impedances Z L 1-4, 1 Lange coupler; input signal Vi is transmitted to Lange coupler port 1, Lange coupler port 4 generates output signal Vo', Lange coupler port 2 and port 3 are connected to the moving end of switch S1 and the moving end of switch S2 respectively; the fixed end 1.1 of switch S1 is connected to the load impedance Z L 1. Load impedance Z L The other end of 1 is grounded; the fixed end 1.2 of switch S1 is connected to the load impedance Z L 3. Load impedance Z L The other end of 3 is grounded; the fixed end 2.1 of switch S2 is connected to the load impedance Z L 2. Load impedance Z L The other end of 2 is grounded; the fixed end 2.2 of switch S2 is connected to the load impedance Z L 4. Load impedance Z L The other end of 4 is grounded; the switching of switch S1-2 is controlled by the control signal output by the control module, so as to select the load impedance connected to port 2 and port 3 of the Lange coupler according to the specific situation, such as Z L 1 can be with Z L 2 or Z L 4 Pairing, Z L 3 can also be used with Z L 2 or Z L 4 pairs are used to obtain 4 working modes that can be flexibly switched.

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