An 8*8 radio-frequency switch matrix with high isolation

Abstract

An 8*8 radio-frequency switch matrix with high isolation degree comprises a case unit, an input radio-frequency switch unit, an output radio-frequency switch unit, a main control unit, a radio-frequency switch control unit and a radio-frequency switch power supply unit. The invention reduces the number of control signal lines by adopting the method of serial-to-parallel conversion, disconnects thecontrol signal after the switch is switched, makes the wiring in the case regular, and reduces the mutual crosstalk between the control lines. The power supply mode of the radio frequency switch is optimized, the signal crosstalk in the power supply line is reduced, the isolation between channels of the radio frequency switch matrix is improved, and the power consumption of the whole equipment isalso reduced. The invention has the characteristics of high isolation degree and low power consumption, can reduce the interference and noise between channels in radio frequency communication systemssuch as wireless communication, electronic reconnaissance, radar and the like, and improve the working performance of the receiver.

Description

technical field [0001] The invention belongs to the technical field of radio frequency communication, and in particular relates to a high-isolation 8×8 radio frequency switch matrix. Background technique [0002] The RF switch matrix is ​​mainly used to control the transmission path of RF signals. It is usually composed of multiple RF switches through a certain relationship to form a large-scale RF switch form with interoperable rows and columns. The RF switch matrix is ​​widely used in many RF communication systems such as wireless communication, electronic reconnaissance, and radar, and is an essential part of channel switching in these systems. In the radio frequency communication system, the port switching technology of the radio frequency switch matrix is ​​usually used to enable multiple receivers at the back end to share multiple front-end antennas, reduce the size and redundancy of the radio frequency system circuit, and improve the flexibility of the radio frequency...

AI Technical Summary

Problems solved by technology

In the traditional RF switch matrix, when it is necessary to maintain the switching state of an RF switch, it must be powered continuously. This power supply method causes the signal of the adjacent channel to crosstalk to the channel through the power line of the RF switch, resulting in isolation. The degree of reduction, but also cause a very large loss of power consumption

Moreover, in order to achieve precise control of the RF switches of each channel, all the controls of the RF switches need to be controlled by separate control signal lines, resulting in a large number of control signal lines in the entire RF switch matrix, between these lines in a small chassis Mutual crosstalk will also cause a reduction in isolation

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