Grid single-board multi-frequency multi-radiator antenna

Abstract

A grid single-board multi-frequency multi-radiator antenna relates to a planar antenna. The antenna comprises a dielectric substrate (1), a metal ground (2) on the dielectric substrate (1), a radiation slot (3), an upper radiation patch (4), a lower radiation patch (5), and a micro-strip feeder (6). One side of the dielectric substrate (1) is equipped with the metal ground (2), a grid (21) and the radiation slot (3), and the other side is equipped with the upper radiation patch (4), the lower radiation patch (5) and a conduction band (11) of the micro-strip feeder (6). A plated-through hole array connects the metal ground (2) and the radiation patches. One end of the micro-strip feeder (6) is an antenna port (10), and the other end of the micro-strip feeder (6) is open-circuited, crosses over the radiation slot (3) and extends a certain length. The antenna works at multiple frequencies through multiple radiators. The frequencies are independently adjustable, and the radiation characteristic is adjustable. The antenna is of small size and cross polarization.

Description

technical field [0001] The invention relates to a planar antenna, in particular to a grid single-board multi-frequency multi-radiator antenna. Background technique [0002] The planar antenna is a commonly used antenna, which has the characteristics of simple structure and convenient processing. There are generally two types of planar antennas: slot antennas and patch antennas. The slot antenna is the dual antenna of the vibrator antenna, which is omnidirectional radiation. However, the common slot antenna not only needs to have a length of 1 / 2 wavelength of the radiation slot, but also needs a large metal ground area around the radiation slot. The current of the metal ground along the direction of the slot will generate cross-polarized radiation, resulting in poor cross-polarization of the antenna, which will lead to a decrease in spectral efficiency and channel capacity. At the same time, the impedance of the slot is very large, which also makes it difficult to match th...

AI Technical Summary

Problems solved by technology

However, the ordinary slot antenna not only needs to have a half wavelength of the length of the radiation slot, but also needs a large metal ground area around the radiation slot.

The current of the metal ground along the direction of the slot will generate cross-polarized radiation, which will lead to the deterioration of the cross-polarized antenna, which will lead to a decrease in spectral efficiency and channel capacity

At the same time, the impedance of the slot is very large, which also makes the impedance matching of the slot antenna feeding transmission line more difficult.

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