Open AccessQuad band‐notched ultrawideband antenna with a modified H‐shaped resonator
Author(s) -
Sung Youngje
Publication year - 2013
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2013.0002
Subject(s) - ground plane , resonator , band rejection , microstrip antenna , dielectric resonator antenna , microstrip , patch antenna , optics , return loss , bandwidth (computing) , omnidirectional antenna , materials science , physics , acoustics , antenna (radio) , telecommunications , engineering
In this study, a novel planar ultrawideband antenna, with a quad band‐notched function, is investigated. The proposed antenna consists of a circular‐shaped radiating element, a 50 Ω microstrip feed line, a modified H‐shaped resonator, and a partially truncated ground plane. The proposed H‐shaped resonator, with quadruple resonance characteristics, is realised without any change in its size but instead, by modifying the simplified composite right/left‐handed resonator with dual resonance characteristics. By embedding the modified H‐shaped resonator beside the microstrip feedline, band‐rejected filtering properties in the wireless local area network /worldwide interoperability for microwave access bands are generated. By changing the modified H‐shaped resonator's dimensions, the proposed antenna shows variable quadplex‐filtering characteristics, such as band‐notch frequency and its bandwidth. The measured results show that the proposed antenna design exhibits a 10 dB return loss bandwidth from 2.12 to 13.63 GHz, excluding the rejection bands. Very sharp notch and high band‐rejection are achieved, and relatively stable omnidirectional radiation performance over the entire frequency range is also obtained.