A Low Intermodulation Automatic Transfer Switch

Abstract

An embodiment of the invention discloses a low-intermodulation automatic transfer switch which comprises the components of: a first connecting board and a second connecting board which are arranged oppositely; a plurality of first contacts which are arranged on the first connecting board and are arranged in an array manner, wherein the plurality of first contacts comprise oven-number signal input contacts and oven-number signal output contacts; a plurality of second contacts which are arranged on the second connecting board and can connect the signal input contacts with the signal output contacts in a cascade manner, wherein two second contacts in each pair of second contacts are conducted; a three-coordinate driving unit which is connected with the second connecting board for driving the second connecting board for moving in a front-and-back direction, a left-and-right direction and a vertical direction relative to the first connecting board; and a controller which is connected with the three-coordinate driving unit in a signal connection manner and realizes cascade connection between the signal input contacts and the signal output contacts through the plurality of pairs of second contacts through controlling the three-coordinate driving unit. The low-intermodulation automatic transfer switch is suitable for intermodulation test of a passive antenna.

Description

technical field [0001] The invention relates to the technical field of passive intermodulation testing, in particular to a low intermodulation automatic switching switch. Background technique [0002] In mobile communication systems, passive antennas will have nonlinear intermodulation distortion, especially in high-power, multi-channel communication systems, the generated nonlinear intermodulation distortion signals will affect normal communication, so the intermodulation of passive antennas (Passive intermodulation) test is very necessary. [0003] At present, passive antennas mainly include two forms of broadband multi-port and single-frequency multi-port, and the intermodulator used to test passive antennas usually only has two output channels in the same frequency band, so when performing intermodulation on passive antennas During the test, after each two channels of the passive antenna are tested, the operator needs to manually change the line and switch the test chan...

AI Technical Summary

Problems solved by technology

However, the low intermodulation switches that make up the switch matrix have poor reliability and short service life, such as figure 1 As shown, the two-choice low intermodulation switch adopts the voltage holding type control method. When the voltage (12V) is applied to the A terminal, J0 and J1 are turned on, and when the voltage (12V) is applied to the B terminal, J0 and J2 are turned on.

However, the use of voltage-holding control method will generate a lot of heat and accelerate the aging of the switch, resulting in a very short service life of the 2-1 low intermodulation switch. It is necessary to frequently replace the damaged 2-1 low intermodulation switch in the switch matrix. However, the process of replacing the two-choice low-intermodulation switch is time-consuming and laborious. Therefore, the above-mentioned switch matrix method cannot improve the efficiency of the intermodulation test for passive antennas.

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