Base station tunable antenna broadband and slow wave phase shifter

Abstract

The invention discloses a base station tunable antenna broadband and slow wave phase shifter. The base station tunable antenna broadband and slow wave phase shifter mainly comprises a phase shifting piece and a coupling piece, and is characterized in that the wave phase shifter mainly comprises a phase shifting medium piece and a phase shifting coupling piece; copper wholly covers one face of the phase shifting medium piece, and the other face comprises a three-slow-wave-structure circular-arc arm, a feeder line and a central phase output line; the two ends of the three-slow-wave-structure circular-arc arm are connected with antenna radiation units respectively; the central phase output line is connected with the feeder line; the other end of the central phase output line is connected with the antenna central phase radiation unit; a coupling arm is arranged on one face of the phase shifting coupling piece. The base station tunable antenna broadband and slow wave phase shifter adopts a slow wave structure and can guarantee enough phase shifting amount under the condition that the whole volume is smaller; seven paths of the antenna radiation units can be accessed at the same time and the use frequency section is wide; the base station tunable antenna broadband and slow wave phase shifter has the advantages of simple structure, convenience for assembling and the like.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a base station antenna broadband slow-wave phase shifter. Background technique [0002] At present, the electronic adjustable antenna has become the technical trend of the existing base station antenna. By adjusting the phase shift position of the antenna phase shifter to change the phase of each radiation unit of the antenna, thereby changing the coverage of the antenna beam, so the phase shifter of the antenna is It is the absolute technical core of electric adjustable antenna. In the prior art, the phase shifter generally adjusts the downtilt angle of the antenna by changing the length of the transmission line or changing the medium of the transmission line. The change of the phase shift amount of the phase shifter is directly proportional to the change of the length of the transmission line of the phase shifter. The larger the phase shift amount of the phase shifter, ...

AI Technical Summary

Problems solved by technology

In order to increase the variation range of the transmission line length, the size of the existing phase shifter will also increase, which will reduce the wiring space of the antenna feed system, increase the complexity of the wiring, and have a great impact on the electrical performance of the antenna.

There is not a large enough range of transmission line length variation, and the phase shifter has a small amount of phase shift, which directly affects the adjustment range of the downtilt angle of the antenna pattern, which limits the location of the base station antenna

Changing the medium of the transmission line to adjust the downtilt angle of the antenna has the disadvantages of large size of the phase shifter, large loss of dielectric materials, high cost, and small amount of phase shifting

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