Base station antenna and multi-port phase shifter thereof

Abstract

The invention provides a base station antenna and a multi-port phase shifter thereof. The multi-port phase shifter comprises a cavity, a phase shifting circuit arranged in the cavity, and dielectric plate which covers the phase shift circuit and can move along the length direction of the cavity; the phase shift circuit comprises a plurality of phase shift units and a plurality of output ports connected with the phase shift units in a one-to-one correspondence manner. At least two phase shift regions arranged along the width direction of the cavity are arranged in the cavity, and each phase shift region comprises at least one phase shift unit and one dielectric plate used for changing the dielectric constant of the phase shift unit in the phase shift region. According to the multi-port phase shifter, due to the fact that the cavity is internally provided with the at least two phase shifting areas arranged in the width direction of the cavity, the phase shifting circuit can be arranged in the width direction of the cavity, the longitudinal length of the whole structure is reduced, the transverse length of the cavity is properly increased, machining and forming of the cavity are better facilitated, the manufacturing difficulty is reduced, and good performance is guaranteed.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a multi-port phase shifter and a base station antenna using the multi-port phase shifter. Background technique [0002] At present, in the field of mobile communication technology, with the continuous introduction of new standards and new spectrums, antenna equipment is required to support more spectrums, and the resulting problem is that the number of phase shifters in base station antennas continues to increase. The size continues to increase, and the layout of the feed network is becoming more and more complex. [0003] Such as figure 1 As shown, in the existing dielectric phase shifter, its working principle is to realize the phase shift by changing the dielectric constant of the transmission line between the feed point and the antenna unit, specifically, the phase shift circuit is changed by moving the dielectric plate. The area covered by the dielectric plate...

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Problems solved by technology

[0002] At present, in the field of mobile communication technology, with the continuous introduction of new standards and new spectrums, antenna equipment is required to support more spectrums, and the resulting problem is that the number of phase shifters in base station antennas continues to increase. The size is increasing and the layout of the feeding network is becoming more and more complex

[0003] like figure 1 As shown, in the existing dielectric phase shifter, its working principle is to realize the phase shift by changing the dielectric constant of the transmission line between the feed point and the antenna unit, specifically, the phase shift circuit is changed by moving the dielectric plate. The area covered by the dielectric plate can adjust the dielectric constant of the phase-shifting circuit, but the phase-shifting circuit in this structure can only be laid out along the length of the cavity. As the demand for output ports increases, the phase-shifting circuit and cavity The longitudinal length of the tube is continuously extended, which increases the difficulty of molding and electroplating of the cavity, which easily leads to an increase in the PIM value of the phase shifter, making it difficult to achieve miniaturization and also affects the performance indicators of the phase shifter

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