Combined phase shifter

Abstract

The invention relates to a combined phase shifter comprising a cavity which comprises a first sub-cavity, a second sub-cavity and a third sub-cavity which are arranged separately; a phase shifter module which comprises a first phase shifter and a second phase shifter, wherein the first phase shifter is located in the first sub-cavity, the second phase shifter is located in the second sub-cavity and the first phase shifter and the second phase shifter operate in different frequency bands respectively; and a combiner module which is located in the third sub-chamber and electrically connected with the first phase shifter and the second phase shifter respectively so as to combine and output the frequency band signals outputted from the first phase shifter and the second phase shifter. Therefore, the mutual influence and interference among the modules can be effectively reduced, the isolation among the modules can be greatly improved and the physical size of each sub-cavity is relatively reduced when the overall size of the cavity is unchanged so that the resonance frequency of the cavity can be raised to the working frequency far away from the phase shifter and the resonance phenomena can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of mobile communication radio frequency devices, in particular to a combined phase shifter. Background technique [0002] With the development of mobile communication technology, multi-frequency antennas play an increasingly important role in network coverage, and in order to facilitate layout and reduce size, it will become a trend to integrate combiners and phase shifters. For example, in the combined phase shifter in the related art, the phase shifter module and the combiner module are integrated in an integrally formed metal cavity. However, due to the limited size of the cavity, the modules are relatively close to each other without any shielding, so there is cross interference between the modules, resulting in strong mutual coupling and poor isolation between the modules, which ultimately leads to poor system performance. In addition, an excessively large cavity structure will cause the phase shifter ...

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to provide a combined phase shifter for the problems of poor isolation and easy cavity resonance phenomenon in the current combined phase shifter

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