Slot antenna of gate slot ground coaxial feed metal via hole stepped-impedance

Abstract

A slot antenna of gate slot ground coaxial feed metal via hole stepped-impedance relates to a slot antenna, and comprises a dielectric substrate (1), a metal ground and a radiation slot (3) which are arranged on the dielectric substrate (1) and a coaxial feeder line (4). The radiation slot (3) and a plurality of parallel gate slots (6) are arranged on the metal ground (2), and the two ends of the radiation slot (3) are in short circuit. Two rows of metallization via holes (7) at the middle part of the radiation slot (3) are in array arrangement to form a low-resistance slot (8), and the rest part of the radiation slot (3) is a high-resistance slot (9). A conductor (5) outside the coaxial feeder line (4) is connected with the metal ground (2), a conductor (12) in the tail end of the coaxial feeder line (4) spans the high-resistance slot (9) and is connected with the metal ground at the edge (11) of the high-resistance slot (9). The antenna is in multi-frequency band work, enables the size and the shelter to be reduced and the isolation to be improved, and restrains the cross polarization.

Description

technical field [0001] The invention relates to a slot antenna, in particular to a slot antenna with step impedance of metal via holes fed coaxially by grid slots. 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 t...

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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