Coaxial feed metal through hole stepped-impedance half slot antenna

Abstract

The half-slot antenna with coaxial feeding metal via hole step impedance relates to a slot antenna, which includes a dielectric substrate (1), a metal ground (2) on the dielectric substrate (1), a radiation slot (3), and a coaxial feeder (4); there is a radiation slot (3) on the metal ground (2); one end of the radiation slot (3) is short-circuited, and the other end (6) is open; there are two rows of metal wires near the open end of the radiation slot (3). The low-resistance slot (8) is formed by the via hole (7) array; the rest of the radiation slot (3) is a high-resistance slot (9), and the outer conductor (5) of the coaxial feeder (4) is connected to the metal ground (2 ), the inner conductor (12) at the end of the coaxial feeder (4) straddles the high-resistance slot (9) at its edge (11), and connects with the metal ground (2). The antenna is multi-band operation which reduces antenna size, cross-polarization, shadowing and improves isolation.

Description

technical field [0001] The invention relates to a slot antenna, in particular to a half-slot antenna with step impedance of a coaxial feeding metal via hole. Background technique [0002] The slot antenna is the dual antenna of the dipole antenna and has a wide range of applications. However, the ordinary slot antenna not only needs half the wavelength of the radiation slot itself, but also needs a large metal ground area around the radiation slot, usually the length of the metal ground is 1 / 2 larger than the length of the slot One wavelength, the width of the metal ground is one-half wavelength larger than the width of the 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 it difficult to match the imp...

AI Technical Summary

Problems solved by technology

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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