Slot antenna with coplanar waveguide feed capacitance loading stepped impedance

Abstract

A slot antenna with a coplanar waveguide feeding capacitor loaded with a step impedance relates to a slot antenna, the antenna comprises a dielectric substrate (1), a metal ground (2) on the dielectric substrate (1), a radiation slot (3), a common Surface waveguide feeder (4); a radiation slot (3) is arranged on the metal ground (2); both ends (6) of the radiation slot (3) are short-circuited; there are several capacitors (7) in the middle of the radiation slot (3) Connected in parallel at its edge to form a low-resistance slot (8); the rest of the radiation slot (3) is a high-resistance slot (9); the coplanar waveguide feeder (4) the outer conductor (5) and the metal ground (2) ) is connected, and the inner conductor (12) at its end crosses the high-resistance slot (9) at its edge (11), and is connected with the metal ground (2). The antenna is multi-band operation to reduce antenna size, cross-polarization, shading and improve isolation.

Description

technical field [0001] The invention relates to a slot antenna, in particular to a slot antenna with step impedance loaded by a coplanar waveguide feeding capacitance. 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 mat...

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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