Switching device of coaxial cable and air microstrip line

Abstract

The invention discloses a switching device of a coaxial cable and an air microstrip line, which comprises a reflection plate (1), an air microstrip line (2), a microstrip open-circuited line (4) of 1 / 4 wavelength and a coaxial cable (6), wherein the air microstrip line (2) and the microstrip open-circuited line (4) of 1 / 4 wavelength are fixed on the reflection plate (1) through an insulating medium pad (7); an external conductor (6-2) of the coaxial cable (6) is connected to the microstrip open-circuited line (4) of 1 / 4 wavelength, and an internal conductor (6-1) of the coaxial cable (6) is in coupling connection with the air microstrip line (2). The switching device of a coaxial cable and an air microstrip line provided by the invention has the advantages that an external conductor of a coaxial cable is connected to a microstrip open-circuited line of 1 / 4 wavelength, the microstrip open-circuited line of 1 / 4 wavelength is theoretically equivalent to a short circuit of the external conductor, and the microstrip open-circuited line regulates the stationary wave as well as playing a part in inhibiting the current of the external conductor.

Description

technical field [0001] The invention relates to a switching device for a coaxial cable and an air microstrip line. Background technique [0002] With the rapid development of base station antenna technology, air microstrip technology, due to its good structural consistency, small antenna gain loss and low cost, is more and more applied to the design of base station antennas. At the same time, with the improvement of mobile communication quality requirements, higher requirements are put forward for various technical indicators of base station antennas, and the third-order intermodulation of antennas has gradually become one of the difficulties in antenna design. In the air microstrip antenna design, the signal input can be directly connected to the air microstrip line through the connector for feeding, or the signal can be input through the connector assembly with a coaxial cable. The above two transfer methods are costly and the structure is relatively complicated. . [00...

AI Technical Summary

Problems solved by technology

There are two problems: (1) Because the current at the transfer point is the largest, third-order intermodulation is easily generated at the contact between the ground block and the reflector, resulting in a low intermodulation pass rate of the entire antenna; (2) The inner conductor and the microstrip are welded, and the microstrip line needs to be welded, and the aluminum microstrip line needs to be electroplated

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