Microstrip feed capacitor loading tri-polarized slot antenna

Abstract

A three-polarization slot antenna loaded with microstrip feeding capacitance relates to a slot antenna, which is composed of three mutually perpendicularly placed single-polarization antennas (13); each antenna (13) includes a dielectric substrate (1), The metal ground (2) on the dielectric substrate (1), the radiation slot (3), and the microstrip feeder (4); the metal ground (2) has the radiation slot (3); the two ends of the radiation slot (3) (6) short circuit; Remove other parts (9) of the part (8) intersecting with the microstrip feeder line (4) at the radiation slot (3) to have several capacitors (7) connected in parallel across its edge; the microstrip feeder line ( 4) One end is the antenna port (10), and the other end of the microstrip feeder (4) crosses the radiation slot (3) and is connected to the metal ground (2) through the shorting pin (12) at the edge (11). The antenna reduces antenna size, cross polarization, shadowing and improves isolation.

Description

technical field [0001] The invention relates to a slot antenna, in particular to a three-polarization slot antenna loaded with a microstrip 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. Multi-polarization MIMO can effectively improve spectrum efficiency and channel capacity. In order to apply MIMO technology to small terminals, antennas with different polarizations need to be co-located. A large metal ground will have a shielding effect on the radiation of the antenna, making the slot antenna unsuitable for co-located multiple...

AI Technical Summary

Problems solved by technology

A large metal ground will have a shielding effect on the radiation of the antenna, making the slot antenna unsuitable for co-located multiple-input multiple-output (MIMO) applications, especially when used as a multi-polarized antenna, a large metal ground will cause the antenna to Poor cross-polarization, poor isolation between antenna ports, 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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