Improved Frequency Notched Ultrawideband Slot Antenna Using Square Ring Resonator

• Published in: IEEE transactions on antennas and propagation Vol. 55; no. 9; pp. 2445 - 2450
• Main Authors: LUI, Wen-Jun, CHENG, Chong-Hu, ZHU, Hong-Bo
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.09.2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Applied sciences; Dipole antennas; Exact sciences and technology; Frequency; Frequency notched; Impedance matching; Microstrip antennas; Noise levels; Optical ring resonators; Prototypes; Radiocommunications; Resonators; slot antenna; Slot antennas; square ring resonator; Telecommunications; Telecommunications and information theory; Tuning; Ultra wideband antennas; Ultra wideband technology; Ultrawideband; ultrawideband (UWB); Performance evaluation; Frequency characteristic; Impedance matching; Ring resonator; Slot antenna; Microstrip antennas; Stub line; ultrawideband (UWB); Frequency notched; square ring resonator; Tuning; Ultra wide band
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2007.904090

An improved frequency notched ultrawideband (UWB) microstrip slot antenna with a square ring resonator embedded in the tuning stub is proposed. The antenna is investigated numerically and experimentally for its impedance matching property, frequency notched characteristic and radiation performance in detail. As will be reported, compared with conventional frequency notched slot antennas, after incorporating a square ring resonator with the slot antenna's tuning stub, high, sharp band-rejection characteristic of over 20 dB is achieved, which is improved significantly.