Small ultra wideband band-notched antenna with controllable second-order notched bandwidth

Abstract

The invention discloses a small ultra wideband band-notched antenna with controllable second-order notched bandwidth. The antenna is printed on a dielectric slab, and comprises a step change width gap formed in the front surface of the dielectric slab, a microstrip feeder arranged on the back of the dielectric slab, a terminal-open quarter-wavelength gap formed in the back of the microstrip feeder, and a terminal-short half-wavelength gap formed beside the step width gap. The electromagnetic wave on the microstrip feeder is coupled onto the step width gap and radiated out; the quarter-wavelength gap is perpendicular to the microstrip feeder; and the quarter-wavelength gap and the half-wavelength gap form two resonators coupled with each other in the notched frequency band. due to the antenna provided by the invention, the technical problems of large size, uncontrollable notched bandwidth and poor selectivity of the existing ultra wideband antenna are solved, the selectivity of notched waves and the controllability of second-order bandwidth are improved greatly, and the anti-interference effect is good.

Description

Technical field [0001] The invention relates to a plane miniaturized ultra-wideband trap antenna, in particular to an ultra-wideband trap antenna with good trap selectivity and controllable bandwidth. Background technique [0002] In recent years, ultra-wideband (Ultra-Wideband) communication systems have attracted more and more attention. Compared with traditional wireless communication systems, ultra-wideband communication without carrier pulse technology has its own unique advantages: high-speed data transmission rate, low power loss, short distance, etc. It is believed that ultra-wideband communication is very likely to become a short-range communication method in the future. As the front-end equipment and important part of ultra-wideband communication, the research of ultra-wideband antennas has become a research focus in recent years. Research on ultra-wideband antennas includes small size, simple structure, good impedance matching, stable radiation characteristics and hi...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of large size, uncontrollable notch bandwidth and poor selectivity of the existing ultra-wideband antenna, the present invention provides a small ultra-wideband notch antenna with controllable second-order notch bandwidth, which is realized by using a second-order resonator A single notch greatly improves the selectivity of the notch and the controllability of the second-order bandwidth; in the communication environment, it can provide good anti-interference effect

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