Ultra wide band antenna with trap characteristic

Abstract

The invention provides an ultra wide band antenna with trap characteristic, which comprises a medium substrate, a radiating unit, a coplanar waveguide feed signal zone line and a coplanar waveguide ground plane, wherein the coplanar waveguide feed zone line is directly connected with the radiating unit, and the coplanar waveguide ground plane surrounds the radiating unit and the coplanar waveguide feed signal zone line. The antenna has favorable wide band characteristic and omnidirectional radiation characteristic, and the trap characteristic of the antenna can avoid interfering communications of wireless local area networks. The antenna has the advantages of simple and compact design, small size, convenient processing and low cost. The invention can be used for electronic reconnaissance and electronic countermeasure, terminal receiving equipment for tracking, electromagnetic protection and ultra wide band wireless communications, and the like.

Description

technical field [0001] The invention relates to an antenna. In particular, an ultra-wideband antenna with notch characteristics. Background technique [0002] Since radio communication equipment and electronic information equipment are developing toward multi-functionality, miniaturization, ultra-wideband, and friendly coordination with the surrounding environment, this makes broadband, miniaturization, and high gain one of the hot research topics at home and abroad. In recent years, the coplanar waveguide structure that does not require drilling and is easy to integrate is changing day by day, and the structure can be fabricated by photographic technology, and has better polarization characteristics, so this technology has been applied in the design of ultra-wideband antennas and related microwave In the design of circuit components. However, the frequency band occupied by the current ultra-wideband communication and the wireless local area network have a common part, so ...

AI Technical Summary

Problems solved by technology

Usually this method will cause mismatch between the antenna and the microwave circuit, and even reduce the overall performance of the system, so designing an ultra-wideband antenna with notch characteristics is one of the important methods to solve this problem

At the same time, solve some shortcomings of existing antennas: (1) The structure and process of the currently designed antenna are relatively complicated, so designing an antenna with a simple structure has become a research hotspot at this stage

(2) At present, most ultra-wideband antennas usually need to drill holes during system integration, and use reactive elements to connect to the RF front-end, so the complexity of the system is increased, the performance of the system is reduced, and the needs of miniaturization cannot be met.

However, it still cannot overcome the current electromagnetic interference problem

The document "Harmonic Control For An Integrated Microstrip Antenna With Loaded Transmission Line, Shun-Yun Lin, Kuang-Chih Huang, and Jin-Sen Chen. Microwave And Optical Technology Letters, Vol.44, No.4, February, 2005", proposed One uses periodic structure to suppress harmonics, but it is large in size and complex in structure

In order to overcome the above shortcomings, the document "Design of a 5.8-GHz Rectenna Incorporating a New Patch Antenna, Ching-Hong K.Chin, Quan Xue, Chi Hou Chan, IEEE Antennas And Wireless Propagation Letters, Vol.4, 2005", elaborated The method of etching the filter on the coplanar waveguide feeder to achieve the characteristics of the notch, but the volume is still large

Literature "A miniaturized monopole antenna for ultra-wide band applications with band-notch Filter, B. Ahmadi, R. Faraji-Dana, IET Microw. Antennas Propag., 2009, Vol.3, Iss.8, pp.1224-1231 .” described the ultra-wideband antenna with notch characteristics etched U-shaped grooves and V-shaped grooves, but the volume is large, and the gradual feeding structure is used, resulting in complex structures and difficulties in design and debugging.

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