Phase shifter module based on medium loading

Abstract

The invention relates to the field of mobile communication base station antennae, in particular to a phase shifter applied to electric tilt base station antennae. The invention discloses a phase shifter module based on medium loading, comprising a transmission line structure which takes air as transmission medium and a basic transmission mode as a TEM model or a quasi-TEM model, such as strip lines or microstrip lines. The phase shifter module is characterized in that the phase shifter module also comprises at least one movable medium sheet arranged between transmission lines; according to the strip line structure, the medium sheet is also provided with a gap for arranging the strip line; along with the movement of the medium sheet, transmission lines and the medium sheet have relative displacement; and phase position delay is changed by changing the superposition area of the medium sheet and the transmission lines so as to realize signal phase shift. When the phase shifter works, the medium sheet moves vertically to energy transmission direction; by selecting medium material with low loss, the phase shift module has the advantages of low insertion loss, less spurious radiation, large phase shift amount, small volume, low cost and the like, and the phase shift amount and the medium sheet displacement are in linear relation; because of adopting modular design, the invention can be conveniently connected via the coaxial line, thus realizing flexible layout and diversified phase shift and feed network design.

Description

Technical field: [0001] The invention relates to the field of mobile communication base station antennas, in particular to a phase shifter module applied to base station electric adjustment antennas. Background technique: [0002] The phase shifter is the core component of the electric antenna of the base station. The current design of the phase shifter generally adopts the following two methods: 1. Change the electrical length of the signal passing path in the phase shifter. The continuously variable phase shifters described in patent documents with patent No. ZL200520065549.5 and patent No. ZL 200520121325.1 all change the electrical length of the passing path by changing the relative contact length of the copper (aluminum) sleeve . In order to reduce sliding resistance and ensure low passive intermodulation products in this method, it is often necessary to transmit signal energy through coupling. The length of the sleeve of the coupling section should generally not be to...

AI Technical Summary

Problems solved by technology

The phase shift amount can be changed by changing the insertion degree of the dielectric sheet, but the dielectric sheet design with a simple shape cannot guarantee the linear relationship between the phase shift amount and the medium phase shift amount. Guaranteed a good standing wave; and the design is integrated with the power distribution network, compared with the phase shifter module proposed by the present invention, the cost is higher and the layout flexibility is not enough

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