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Mixed circulator of high transmit-receive isolation degree

A technology of transceiver isolation and circulator, which is applied in waveguide devices, electrical components, circuits, etc., can solve the problems of limited application and achieve the effects of reduced production cost, low cost, and high transceiver isolation

Inactive Publication Date: 2007-05-02
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

The circulator isolation of the power divider or hybrid ring is equivalent to that of the ferrite circulator, and its isolation is about 20dB, which also limits its application in the system

Method used

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  • Mixed circulator of high transmit-receive isolation degree
  • Mixed circulator of high transmit-receive isolation degree
  • Mixed circulator of high transmit-receive isolation degree

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[0026] As shown in Figure 1, it is a hybrid circulator that cascades a hybrid ring (Figure 8) and three power dividers (Figure 5). material on the substrate. Port 3 is the transmitting port, port 5 is the receiving port, and port 4 is the antenna port, among which port 4 and port 7 are interchangeable; port 6 and port 7 are respectively connected to 50Ω resistors to the ground, and the port grounding resistors are 0402 patch thin film resistors. Fine-tune the length of the equally divided power arm so that the center frequency of the circulator is 25 GHz. The loss from the transmitting end 3 to the antenna end 4 of the circulator and the loss from the antenna end 4 to the receiving end 5 are shown in Fig. 2 and Fig. 3 and Fig. 4 respectively The isolation from the transmitter 3 to the receiver 5 is improved. It can be seen from the figure that the power transmitted from the transmitting end to the antenna end and the power transmitted from the antenna end to the receiving en...

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Abstract

A mixed circulator of high transceiver and isolation type is compounding three power dividers and one hybrid ring on media substrate, series-connecting said power dividers and equally divided end of hybrid ring to be ring form, using difference end of hybrid ring as emission end of circulator, using sum end of one power divider as antenna end of circulator and using sum end of another power divider as receiving end of circulator then setting ground resistance separately on each port.

Description

technical field [0001] The invention relates to a circulator used for transmitting and receiving isolation in single-antenna schemes of radar and communication systems, in particular to a novel hybrid circulator with high transmitting and receiving isolation applicable to microwave communication systems of various frequency bands. Background technique [0002] In systems such as radar and communication, a single-antenna solution is often used to reduce the size of the system. The single-antenna solution requires a circulator for transceiver isolation. Commonly used ferrite circulators are expensive and have low isolation. The transmit power leaks to the receiving end, which easily saturates the low-noise amplifier at the receiving end, limiting its application in the system. In low-cost transceiver systems, a single power divider or hybrid ring can also be used instead of a ferrite circulator. Using a single power divider or a hybrid ring as a circulator, the transmit power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/38
Inventor 王闯孙晓玮钱蓉张飞喻筱静顾建忠李凌云余稳
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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