Feed network and base station antenna

Abstract

The invention discloses a feed network and a base station antenna. The feed network comprises a printed circuit board, two micro-strip power dividers and two micro-strip combiners, wherein the two micro-strip power dividers and the two micro-strip combiners are arranged on the printed circuit board. The microstrip structure of each microstrip power divider is used for realizing impedance matching, and the input ends of each microstrip power divider serve as two input ends of the feed network. Two input ends of each microstrip combiner are respectively connected with one output end of each microstrip power divider, and the output ends of each microstrip combiner serve as two output ends of the feed network, so that multiple input multiple output of the feed network is realized. Therefore, when the feed network is applied to the base station antenna, all the radiation units are arranged in a linear matrix, and the effect of miniaturization of the base station antenna is achieved. In addition, when the feed network is used for feeding two adjacent radiation units in the same row, horizontal beam width can be improved, directional diagram distortion can be reduced, the gain can be improved, and sector interference between channels can be reduced.

Description

Technical field [0001] The present application relates to communication technology, and more particularly to a feed network and a base station antenna. Background technique [0002] With the development of wireless technology, the performance requirements of the base station antenna are also increasing, for example: multi-frequency, miniaturization, where how to achieve optimal direction graph performance indicators in each sub-band of the same surface antenna (ie improved Horizontal beam width) has become a bottleneck developed by the current base station antenna. [0003] The currently existing technical solution for improving the horizontal beam width of the base station antenna can be divided into four kinds. The first technical solution is to connect the same column radiation unit 3 in the displacement setting by the phase shifter 1, 2, respectively (eg figure 1 Distance figure 1 The feed network connection is shown in the first embodiment of the radiation unit dislocation s...

AI Technical Summary

Problems solved by technology

The first technical solution is to connect the radiating elements 3 in the same row arranged in dislocation through the phase shifters 1 and 2 respectively (such as figure 1 as shown, figure 1 It is a schematic diagram of feeding network connection of an embodiment of dislocation setting of radiating units in existing base station antennas) to improve the horizontal plane beam width of base station antennas, but this technical solution is only applicable to base station antennas with single frequency and fewer ports. Misplaced radiating elements in multi-port base station antennas will seriously affect the radiation performance of antennas in other frequency bands

The second technical solution is to directly borrow through the phase shifters 1 and 2 respectively or borrow the adjacent array radiation unit 3 after passing through the power divider (such as figure 2 as shown, figure 2 A schematic diagram of feeding network connection of an embodiment borrowed from the radiating unit in the existing base station antenna) to improve the horizontal plane beam width of the base station antenna, but this technical solution can only be applied to the scene where the number of radiating units of the base station antenna is large. When this technical solution is applied to the base station antenna with a small number of radiation units, it will cause serious distortion of the three-dimensional pattern of the base station antenna, reduce the gain of the base station antenna, and affect the radiation performance of the base station antenna

[0004] The third technical solution is to improve the horizontal plane beamwidth of the base station antenna by adding parasitic radiation units. However, when this technical solution is applied to multi-frequency base station antennas, there are problems that the base station antenna occupies a large space and increases the cost.

The fourth technical solution is to realize the interoperability of radiating units through conventional directional couplers or 3dB bridges, so as to improve the horizontal plane beamwidth of base station antennas, but this technical solution has a small coupling coefficient due to conventional directional couplers. The effect of improving the horizontal plane beam width is poor; due to the inherent 90° phase difference between the input and output ports of conventional directional couplers or 3dB bridges, the pattern of the base station antenna is distorted and cannot be eliminated.

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