Perpendicular polarization ultra wide band low-profile Vivaldi antenna

Abstract

The invention discloses a perpendicular polarization ultra wide band low-profile Vivaldi antenna, and belongs to the technical field of a wireless communication technology and radar. The antenna comprises a metal grounding plate, an index gradually-changed plate, a rectangular slotting plate and a coaxial wire; and the index gradually-changed plate is perpendicularly placed between the metal grounding plate and the rectangular slotting plate to form a gradually changed groove between the index gradually-changed plate and the metal grounding plate. In a condition of being close to the metal grounding plate, radiation close to the end emission direction is realized within a very wide frequency band range; the profile height of the Vivaldi antenna is highly lowered, the broadband characteristic of the Vivaldi antenna with the gradually changed index is reserved, and high broadband radiation characteristic in the end emission direction is realized; and the antenna is compacted in structure, simple in processing and assembling, has enough mechanical strength and can be applied to actual applications.

Description

technical field [0001] The invention belongs to the field of wireless communication technology and radar technology, and in particular relates to an ultra-wideband low-profile Vivaldi antenna which is directly fed by a coaxial line and realizes vertical polarization. Background technique [0002] UWB antennas are used in wireless communication systems with large operating bandwidth requirements, and have the advantages of low power consumption, high data transmission rate, high time resolution, strong anti-interference ability, and low cost. Since the 1960s, UWB technology has been mainly used in government and military radio communications and radar systems. In order to enable ultra-wideband technology to be applied to the commercial market without interfering with other existing electronic systems, several countries have formulated bandwidth standards below 900MHz and 3.1-10.6GHz since 2002, which can be directly used in ultra-wideband Broadband systems without authorizat...

AI Technical Summary

Problems solved by technology

But when the Vivaldi antenna works close to the metal surface, its radiation characteristics will be greatly affected

When placed parallel to the metal surface, if the spacing is small, the microstrip slot line feeder will be affected by the metal surface and deteriorate, resulting in a decrease in the radiation performance of the entire antenna, and the beam pointing will deviate from the end-fire direction; perpendicular to the metal surface When placed, the height on the vertical plane will be very large, and the mechanical strength of the antenna is difficult to be guaranteed

Images