An ultra-wideband miniaturized phase shifter unit and its linkage mechanism

Abstract

The invention discloses an ultra-wide-band miniaturized phase shifter unit and a linkage mechanism thereof. The ultra-wide-band miniaturized phase shifter unit comprises an upper shielding plate, a lower shielding plate and a pull rod, wherein two axisymmetric sub units are arranged between the upper shielding plate and the lower shielding plate by taking the pull rod as a shaft; each sub unit comprises a transmission sliding plate, medium blocks and a conductor band; the transmission sliding plate is connected to the pull rod; a straight slot and a tilted slot are formed in the surface of the transmission sliding plate; the medium blocks are mounted on the upper end face and the lower end face of the transmission sliding plate; a first guide block and a second guide block are arranged on the lower shielding plate and are used for positioning the longitudinal movement of the transmission sliding plate and the transverse movement of the medium blocks. The ultra-wide-band miniaturized phase shifter unit has the advantages of miniaturization, high mutual adjustment performance, easiness in implementation of high upper sidelobe suppression, simple structure processing and assembling technology, high reliability, wide working frequency band, high generality, adaptability to 2G, 3G and 4G base station antennas and the like.

Description

technical field [0001] The invention relates to a communication device, in particular to an ultra-wideband miniaturized phase shifter unit and its linkage mechanism. Background technique [0002] The current development of mobile communication is changing with each passing day, and has entered the 4G era. The penetration rate of mobile phones is very high, and it is increasing year by year. The signal volume is large, and the surrounding geographical and electromagnetic environments are becoming increasingly complex, and the requirements for communication antennas are getting higher and higher. Reasonably setting the downtilt angle of the antenna can not only reduce the adjacent cell interference of the cellular network, effectively control the coverage of the base station and the soft handover ratio of the entire network, but also strengthen the signal strength in the coverage area of ​​the base station, thereby improving the quality of the communication network. The introd...

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Problems solved by technology

[0005] For example, Chinese patents 201180001177.8 and 201019050036.X, both of these two phase shifters adopt the principle of method 1. The disadvantage of this patent is that the requirements for the structure and technology are very high. Appropriate bonding force is required. If the bonding force is large, it will be difficult for the conductor swing arm (coupling arm) to swing. If the bonding force is small, the intermodulation of the phase shifter will be unstable and the insertion loss will be large. On the other hand, there are only 4 phase shifting branches. When realizing beamforming of an array antenna with more than 6 array elements, at least two array elements share a phase-shifting branch, and there is an unavoidable bottleneck in upper sidelobe suppression

[0006] The principle of Chinese patent 201210501142.5 is the same as the two patents mentioned above. It adopts the principle of method 1. The advantages and disadvantages are basically the same. The difference is that the former is integrated, and the latter is distributed. The length of the first coupling and the second coupling The sum is relatively large to achieve a large amount of phase shifting, but this also increases the size of the phase shifter. If a phase shifter is implemented on a multi-element array antenna to control one array element, the phase shifter is arranged in a distributed manner. The size of the reflector is much larger than the reflector of the antenna, which increases the size and cost of the antenna. Obviously, this method is not advisable. The only way to compromise is to use a phase shifter to control two array elements, which also has side effects. Bottleneck problem of flap suppression

[0007] The advantages of the phase shifter using the principle of the second method are: simple process, good intermodulation, and easy to realize a phase shifter to control an array element; the disadvantage is that on the premise of achieving the required phase shift amount, use a medium with a low dielectric constant to shift the phase The device is easy to match, but the dielectric volume is large, which is not conducive to the layout of the antenna, and it is difficult to realize the miniaturization of the antenna. It is difficult to match the dielectric phase shifter with high dielectric constant.

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