Ultra wideband antenna with four-notched band characteristics

Abstract

The invention discloses an ultra wideband antenna with four-notched band characteristics. The antenna comprises a dielectric substrate (1), a radiating unit (2), two coplanar waveguide grounding planes (3) and a coplanar waveguide feed micro-strip line (4), wherein all the radiating unit (2), the coplanar waveguide grounding planes (3) and the coplanar waveguide feed micro-strip line (4) are printed on the front surface of the dielectric substrate (1); two complementary split ring resonators (5 and 6) are etched on the radiating unit (2); the two coplanar waveguide grounding planes (3) are positioned on the two sides of the coplanar waveguide feed micro-strip line (4) respectively; two pairs of inverted L-shaped slots (7 and 8) are etched on the coplanar waveguide grounding planes (3); and the split ring resonators (5 and 6) and the inverted L-shaped slots (7 and 8) form four notched bands. The working band of the antenna covers 2 to 12GHz, interference signals in the ultra wide working band can be well suppressed, and the antenna can be used for ultra wideband antenna communication.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to an ultra-wideband antenna with four notch characteristics, which is applied to an ultra-wideband wireless communication system. Background technique [0002] Ultra-wideband UWB technology is a new type of wireless communication technology, which has the characteristics of high transmission rate, low power consumption, and simple system structure, so it has become one of the research hotspots of wireless communication in recent years. As a key component of UWB communication system, the characteristics of UWB antenna will directly affect the transmission performance of the system, so its research and design are of great significance. In 2002, the US Federal Communications Commission FCC approved the use of 3.1-10.6GHz as the working frequency band of ultra-wideband systems. However, there may be some narrow-band interference signals of wireless communication systems in this freque...

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Problems solved by technology

Another example is the Chinese patent with the patent application number 201020531935.X and the patent name "Ultra-Wideband Antenna with Notch Characteristics", which proposes an ultra-wideband antenna with dual notch characteristics. The antenna is fed by a microstrip Electric rectangular radiating unit and coplanar waveguide grounding plane are formed by etching double U-shaped grooves and rectangular grooves on the radiating unit and the floor respectively to form two notched wave bands of 3.8GHz-6GHz and 7.5GHz-9GHz, but this invention The bandwidth of the mid-notch frequency band is too wide, far beyond the frequency range of the interference signal, which undoubtedly results in the reduction of the working frequency band of the ultra-wideband antenna itself

Another example is the document "Planar Ultrawideband Antennas With Multiple Notched Bands Based on Etched Slots on the Patch and / or Split Ring Resonators on the Feed Line, Yan Zhang, Wei Hong, Chen Yu, Zhen-Qi Kuai, Yu-Dan Don, and Jian -Yi Zhou, IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL.56, NO.9, SEPTEMBER 2008", designed an ultra-wideband antenna with three notch characteristics. The radiation element of the antenna is a microstrip-fed circle Shaped monopole, by loading 3 pairs of open-loop resonators of different sizes on both sides of the feeder to form notches in the 2.24GHz-2.62GHz, 3.78GHz-4.03GHz and 5.94GHz-6.4GHz frequency bands, but within the notch frequency band The standing wave ratio is generally small, and the filtering performance is deviated. At the same time, the double-loop structure of the open-loop resonator is complicated, which is not easy to design and debug.

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