VHF-UHF band wideband omnidirectional receiving antenna

Abstract

The present invention discloses a VHF-UHF band wideband omnidirectional receiving antenna which comprises a first structure and a second structure which are arranged vertically symmetrically. The first structure comprises a first round-table-shaped vibrator, a second cone-shaped vibrator, and a plurality of connection rods. The second structure comprises a second round-table-shaped vibrator, a first cone-shaped vibrator, and a plurality of connection rods. The first round-table-shaped vibrator is connected to the second cone-shaped vibrator through the connecting rods. The second round-table-shaped vibrator is connected to the first cone-shaped vibrator through the connecting rods. The first cone-shaped vibrator and the second cone-shaped vibrator are arranged coaxially according to the mode of opposite cones. The first round-table-shaped vibrator and the first cone-shaped vibrator are at the same side of an antenna feed point, and the second cone-shaped vibrator and the second round-table-shaped vibrator are at the other side of the antenna feed point. Compared with a traditional biconical antenna, the working band is wider, the number of impedance bandwidths with VSWR smaller than 2.3 is larger than four, a horizontal omnidirectional directional diagram is provided, the size of the antenna is small, and the antenna is convenient to carry.

Description

technical field [0001] The invention relates to the technical field of wireless communication and antennas, in particular to a VHF-UHF band broadband omnidirectional receiving antenna. Background technique [0002] The advancement of science and technology has promoted the broadbandization and miniaturization of radio equipment. As the front-end component of wireless equipment, the antenna's size and working bandwidth have an important impact on the miniaturization degree and broadband performance of the equipment. On the one hand, the broadbandization of equipment requires the system to have stable working performance in a wider frequency band. For broadband wireless devices, if a narrowband antenna is used to send and receive electromagnetic signals, it is necessary to install multiple antennas on the same device to meet the working needs of the device, which will greatly increase the complexity and space occupation of the device. It will bring problems such as electromag...

AI Technical Summary

Problems solved by technology

Traditional broadband antennas, such as logarithmic periodic dipole arrays, Vivaldi antennas, etc., have a large operating bandwidth, but the beam is single-pointing, and the pattern in the azimuth plane is not omnidirectional, which does not meet the requirements of receiving electromagnetic signals in all directions. need

Although traditional biconical antennas, dipole antennas and other antennas have omnidirectional patterns in the azimuth plane, their bandwidth is not wide enough to meet the needs of broadband applications.

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