Phase shift device capable of adjusting isolation

Abstract

The invention discloses a phase shift device capable of adjusting isolation, which is used for changing the phase of at least one signal flowing through a phase shifter so as to provide the phase to a plurality of radiation units for forming at least two feed ports to radiate in air to form wave beams. The device comprises a mobile part for changing the phase of the signal, a transmission assembly for transferring torque to the mobile part and at least a decoupling unit for changing electromagnetic field coupling among different feed ports. The transmission assembly is in a synchronous movement relationship between movement for phase shift of the mobile part and movement with changed direction of the decoupling unit. By constraining the decoupling unit to follow the transmission assembly for adjusting the signal phase of an antenna to move synchronously, so that association between adjustment of the electromagnetic field coupling among the feed ports and the elevation angle of the antenna wave beam is established, and the isolation of the antenna can be changed while the signal phase of the antenna is adjusted to change the elevation angle of the beam.

Description

【Technical field】 [0001] The invention relates to an antenna suitable for a mobile communication system, in particular to a phase shifting device capable of adjusting isolation. 【Background technique】 [0002] The currently known multi-polarization antenna isolation adjustment method is typically characterized by the fact that the position of the decoupling component used to adjust the signal isolation between the radiating elements is fixed and cannot be moved. Even if the tilt angle of the antenna beam is adjusted, the position of the decoupling component remains the same. Fixed, please refer to patent announcement No. US6734829B1, patent announcement No. CN100435413C, and patent announcement No. US006072439A. In the known prior art of the pieces listed above, the positions of the decoupling components are fixed once they are installed. The applicant found that the decoupling components at the same position are relatively There are great differences in the adjustment of t...

AI Technical Summary

Problems solved by technology

In the known prior art of the pieces listed above, the positions of the decoupling components are fixed once they are installed. The applicant found that the decoupling components at the same position are relatively There are great differences in the adjustment of the isolation of the antenna. For example, at a specific electrical downtilt, the decoupling component at a specific position can improve the isolation of the antenna, but when the electrical downtilt changes, the decoupling at this position The role of the coupling components is also changing. The decoupling components in some positions not only fail to improve the isolation of the antenna, but also make the isolation of the antenna worse. Therefore, it brings great difficulties to the adjustment of the isolation of the multi-polarized antenna.

Especially as the electrical downtilt range of multi-frequency shared antennas becomes wider and wider (for example, the continuous downtilt range of 15dBi gain range antenna is 0-30°), the antenna isolation becomes larger and larger with the electrical downtilt angle, and the network In order to improve the network quality, operators have higher and higher requirements on the isolation between the input ports of each array antenna, which makes it very difficult to achieve the isolation index of multi-polarized antennas

Therefore, in this context, how to improve the isolation between the input ports of each array antenna poses a certain challenge to those skilled in the art

Images