Broadband micro-strip antenna array coupling structure

Abstract

The invention discloses a broadband micro-strip antenna array coupling structure, and aims to provide a micro-strip patch antenna array, which is simple in structure, is conveniently and quickly debugged and can effectively reduce side-lobe levels of antennae. According to the technical scheme, a micro-strip patch antenna array body consists of a plurality of antenna radiation units longitudinally arranged on a dielectric support, wherein a coupling groove is formed below a radiation patch of each antenna radiation unit; the length of the coupling groove of each antenna radiation unit is progressively decreased from middle to two ends, so that a gradually variable coupling groove length aperture coupling form is achieved; the antenna radiation units with the coupling grooves which are equal in length are arranged in pairs on the array body; the lengths of the coupling grooves which are symmetrically formed in pairs from left to right are equal; the patch of each antenna radiation unit feeds through a unit feeder perpendicularly passing through the corresponding coupling groove. According to the broadband micro-strip antenna array coupling structure, the lengths of the coupling grooves are progressively decreased from middle to two ends, so that excitation current for the coupling of the feeders to the patches is changed, and the side-lobe levels of the antennae are reduced.

Description

technical field [0001] The invention relates to a microstrip antenna array structure, in particular to a small aperture-coupled microstrip patch antenna array and a quick debugging method for the antenna array. Background technique [0002] Microstrip antenna is a new type of antenna successfully developed in the early 1970s. Compared with common microwave antennas, it has small size, light weight, low profile, conformal with the carrier, simple manufacture, low cost, and easy integration with microstrip antennas. Circuit integration and microstrip antennas with the same structure can form an array to obtain high gain and other characteristics. At present, the microstrip antenna array composed of the microstrip patch antenna as the radiation unit has been widely used in the radio equipment of the aircraft and the ground handheld system. Due to the inherent disadvantages of narrow bandwidth and low power of microstrip antennas, traditionally, the working bandwidth of microst...

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Problems solved by technology

It has two main disadvantages. The first is that it increases the difficulty of accurate analysis and design, because at this time two different dielectric substrates are involved, so the simple model of the conventional single-layer microstrip antenna is no longer applicable.

Second, since the feeder and the patch are in different planes, the feeder is no longer in an open plane, making it difficult to connect the relevant components to the feeder circuit

However, this classic design method does not consider the influence of mutual coupling, so the energy amplitude distribution actually fed to the antenna unit port through the power division network has an error with the ideal weighting function form. In addition, the actual processed antenna is often different from the The results of simulation calculations vary greatly, making it difficult for the processed antenna to meet the requirements

The commonly used solution is to reduce the error by adjusting the size of the feeder line, but as mentioned above, the adjustment of the size of the feeder line is very cumbersome, time-consuming and laborious, especially in the development of new antennas, it is necessary to modify the design repeatedly, even through Several rounds of prototype trial production can meet the requirements, wasting a lot of development time and development costs

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