Single Layer Multi-Frequency Dual Radiator Antenna

Abstract

A single-layer multi-frequency double-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), a radiation patch (4), and a micro-strip feeder (5). One side of the dielectric substrate (1) is equipped with the metal ground (2) and the radiation slot (3), and the other side is equipped with the radiation patch (4) and a conduction band (6) of the micro-strip feeder (5). A plated-through hole array (7) connects the metal ground (2) and the radiation patch (4). One end of the micro-strip feeder (5) is an antenna port (9), and the other end of the micro-strip feeder (5) is open-circuited, crosses over the radiation slot (3) and extends a certain length. The antenna works at multiple frequencies through double radiators. The frequencies are independently 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 single-layer multi-frequency dual radiator antenna. Background technique [0002] Planar antennas are commonly used antennas, which have 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 dipole antenna, which is omnidirectional radiation. However, a common slot antenna not only requires half the wavelength of the radiation slot, but also requires a larger metal ground area around the radiation slot. Larger metal grounds will make slot antennas unsuitable for multiple-input multiple-output (MIMO) applications, 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 slot has a large impedance, which makes it difficult to match the impedance of the slot antenna ...

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.

A larger metal ground will make the slot antenna unsuitable for multiple-input multiple-output (MIMO) applications, 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 the impedance matching of the slot antenna feeding transmission line more difficult.

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