Butterfly Deformation Radar Antenna

Abstract

The invention discloses a butterfly deformation radar antenna. Radiation arms are symmetrically printed on the front surface of an insulating dielectric plate to form a planar dipole antenna; the upper parts of the radiation arms are in a triangular structure and the lower parts of the radiation arms are in a rectangular structure; the connected part of the triangular structure and the rectangular structure is in circular arc transition; a gap is reserved between two radiation arms; the two radiation arms adjacent to the gap are provided with input ports as feed terminals of the antenna; two sides of the bottom edges of the rectangular structures of the two radiation arms are connected with loading resistors respectively; the other end of each loading resistor is connected with a rectangular shielding cavity to form a loading loop; and four sides of the rectangular shielding cavity are fixed with the edge of the insulating dielectric plate through nuts. The wideband characteristics and good time-domain radiation characteristics are achieved by shortening the transverse dimensions of the radiation arms, the loading resistors and the metal rectangular shielding cavity; the volume of the antenna is relatively small; miniaturization of a radar is easy to achieve; and the installation requirements of a vehicle-mounted ultra-wideband radar system are met.

Description

technical field [0001] The invention belongs to the technical field of broadband imaging radar antennas, and in particular relates to a butterfly-shaped deformation radar antenna. Background technique [0002] In recent years, with the continuous development of infrastructure construction such as the reconstruction of old urban areas, urban roads, and underground pipe networks, ultra-wideband radar detection technology has begun to be widely used in geophysical research, municipal engineering, and road disease detection. Ultra-wideband radar detection technology has the advantages of high resolution, strong penetration, low interception rate and strong anti-interference, etc., and can realize non-contact detection of urban road underground cavities, metal pipe networks, drainage systems and other heterogeneous media structures. And it has the characteristics of no damage to the detected medium. These characteristics make ultra-wideband radar more and more common in the dail...

AI Technical Summary

Problems solved by technology

[0004] At present, the wideband antennas commonly used in UWB radars include bow-tie antennas loaded with resistors and capacitors, transverse electromagnetic wave horn antennas, and Vivaldi antennas. The efficiency is poor, generally below 30%. Due to the limited amplitude of the transmitted signal generated by the transmitter, it will affect the actual detection distance of the radar

Transverse electromagnetic wave horn antennas and Vivaldi antennas have good directivity and high gain, but their near-ground coupling characteristics are poor, and the horizontal and vertical dimensions of these antennas are relatively large, which is not conducive to the miniaturization of the system and the needs of vehicles

Images