Antipodal Vivaldi antenna based on parasitic patch loading technology

Abstract

The invention discloses an antipodal Vivaldi antenna based on a parasitic patch loading technology. The antenna comprises a dielectric substrate, a top layer radiation unit, a bottom layer radiation unit and a feed part, wherein the top layer radiation unit is arranged on the upper surface of the dielectric substrate; the bottom layer radiation unit is arranged on the lower surface of the dielectric substrate; the feed part consists of broadband feed baluns printed on the two sides of the dielectric substrate; the top layer radiation unit and the bottom layer radiation unit are the same in both of dimensions and structures; the top layer radiation unit and the bottom layer radiation unit are symmetrically placed relative to the narrow edge of the dielectric substrate; three parasitic patches are printed on the upper surface of the dielectric substrate; two secondary parasitic patches are symmetrically distributed relative to the main parasitic patch in the middle; and the three parasitic patches are all rectangular with sharpened two ends. By adoption of the metal parasitic patches with the shape, the antenna gain and directionality can be improved.

Description

technical field [0001] The invention relates to the technical field of radio frequency antennas, in particular to an anti-heel Vivaldi antenna based on parasitic patch loading technology. Background technique [0002] UWB antenna is a kind of passive device widely used in wireless communication, and its index directly affects the performance of the whole system. In recent years, due to the increasingly strong demand for bandwidth, anti-interference ability and data transmission rate of the communication system, as one of the key passive components in the system, the high-gain demand for ultra-wideband antennas is also increasing. Common UWB antennas include Vivaldi antennas, log-periodic antennas, etc. Compared with other three-dimensional UWB antennas, the anti-heel Vivaldi antenna using planar printed circuit board technology has the advantages of high directivity, low profile, high gain, and easy integration with other active / passive circuits. Big attention. These char...

AI Technical Summary

Problems solved by technology

Although the exponential gradient curve is beneficial to low-frequency impedance matching, it also reduces the high-frequency effective radiation electrical length, so that high-frequency current cannot be completely radiated

This will cause splitting of the pattern at the high-frequency end of the antenna and decrease in gain, which will affect the working bandwidth of the antenna.

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