A miniaturized three-band unidirectional radiating antenna

Abstract

Disclosed is a miniaturized three-frequency-band unidirectional radiation antenna. The bottom of a quasi-L-shaped metal plate (1) of the antenna is connected to a metal floor (3). Two sides of a horizontal part of the quasi-L-shaped metal plate (1) are bent inwards, the middle part of a vertical part thereof is recessed inwards, and two sides of the lower part of the vertical part are bent inwards. A bent metal monopole (2) is located below the quasi-L-shaped metal plate (1) and is vertically arranged on the metal floor (3), the lower part of the bent metal monopole (2) is a triangular impedance-matching part (2a), and a three-dimensional U-shaped groove (2b) is engraved on the bent metal monopole (2). A coaxial waveguide feed line (4) is located at a circular hole in the bottom of the metal floor (3), and an inner conductor of the coaxial waveguide feed line (4) is connected to the bottom of the bent metal monopole (2). By using the structure of the present invention, a miniaturized three-frequency-band unidirectional radiation antenna with high radiation efficiency can be realized, and the lowest operating frequency band is an ultra-wide frequency band with a relative bandwidth of up to 4: 1.

Description

technical field [0001] The invention belongs to the field of wireless communication system electronic devices, in particular to a miniaturized three-band unidirectional radiation antenna, which supports almost all wireless communication services below 6 GHz, and is suitable for airport high-speed communication, broadband multi-mode software radio communication, and fifth-generation mobile communication , vehicle communication and other fields. Background technique [0002] With the maturity of civil aviation technology and the popularization of aviation service industry, more and more people will take air as the first choice for medium and long-distance travel. For the safety of aircraft flight, between the time the aircraft lands at the airport and the next take-off, the airport control center and the aircraft need to interact with a large amount of data, including the technical data recorded by the aircraft during the flight, and the airlines that need to transmit the data...

AI Technical Summary

Problems solved by technology

Although directional multi-band antennas and directional broadband / ultra-wideband antennas have been extensively studied, there is currently no antenna that can cover the above-mentioned multiple frequency bands including an ultra-wideband, while having a compact electrical size and unidirectional radiation characteristics

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