Broadband filtering unit and antenna array

Abstract

The invention provides a broadband filtering unit. The broadband filtering unit comprises a grounding supporting seat, a feed balun and a square radiating surface; the front surface and the back surface of the square radiating surface are both coated with copper; the shape of the copper coating the front surface is similar to four square structures combined together, and the two square structurespositioned on diagonal lines form two oscillator arms in a polarization direction; the middle position of each oscillator arm is completely hollowed out; each oscillator arm is composed of a pluralityof LC circuits which are connected in series; each oscillator arm is further provided with a plurality of open-circuit filtering branch knots. The broadband filtering unit is used for a multi-frequency multi-array combined antenna and can well avoid interference between the multi-frequency multi-array combined antenna and an adjacent array; the special multi-filtering structure of the broadband filtering unit can adapt to various special-shaped arrays, so that the antenna size is effectively reduced, the performance of an antenna interlaced array is improved; and the broadband filtering unitis simple in structure, convenient to install and low in cost; and meanwhile, expansion of different frequency bands and filtering of different frequency bands can be realized by adjusting the positions of the LC circuits on the radiating surface of the unit and the lengths of the filtering branch knots.

Description

technical field [0001] The invention relates to the technical field of multi-frequency and multi-array combination antennas, in particular to a broadband filtering unit and an antenna array. Background technique [0002] In order to ensure the performance indicators of each frequency band, the conventional multi-frequency multi-array combination antenna divides each array into separate areas inside the antenna, which leads to problems such as large antenna size and high antenna operating costs. In the case of controlling the size, the layout of the array is very compact, and the influence of mutual coupling is very large, resulting in a serious drop in the index. Therefore, antenna manufacturers must also solve the problem of array mutual coupling while controlling the size, and the key to solving the problem lies in the decoupling technology of the antenna oscillator unit. [0003] Multi-frequency multi-array broadband antenna decoupling has always been an important resear...

AI Technical Summary

Problems solved by technology

[0002] In order to ensure the performance indicators of each frequency band, the conventional multi-frequency multi-array combination antenna will divide the area separately for each array inside the antenna, which will lead to problems such as large antenna size and high antenna operation cost.

In the case of controlling the size, the array layout is very compact, and the influence of mutual coupling is very large, resulting in a serious drop in the index

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