Design of multiple band-notch using meander lines for compact ultra-wide band antennas

• Published in: IET microwaves, antennas & propagation Vol. 6; no. 8; pp. 908 - 914
• Main Authors: WENG, Y. F, CHEUNG, S. W, YUK, T. I
• Format: Journal Article
• Language: English
• Published: Stevenage Institution of Engineering and Technology 07.06.2012; The Institution of Engineering & Technology
• Subjects: Antennas; Applied sciences; Circuit properties; Electric, optical and optoelectronic circuits; Electronic circuits; Electronics; Exact sciences and technology; Feeding; Frequency filters; Gain; Ground plane; Meanders; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Notches; Oscillators, resonators, synthetizers; Radiators; Radiocommunications; Resonators; Telecommunications; Telecommunications and information theory; Performance evaluation; Ground plane; Resonator; Return loss; Computer simulation; Meander line; Compact design; Broadband antennas; Ultra wide band; Microstrip line; Notch filter; Transmission line; Pulse response; Slot antenna; Multifrequency antenna; Parallel connection; Band stop filter; Radiation pattern; Printed circuit; Gain
• ISSN: 1751-8725; 1751-8733
• DOI: 10.1049/iet-map.2011.0572

In this study, the design of multiple band notch for compact ultra-wide band (UWB) antennas is proposed. The antenna consists of an elliptical radiator, a microstrip-feed line and a ground plane. Four pairs of meander lines (MLs), working as resonators, are added to the antenna to produce a quadruple band notch characteristic, yet without increasing the overall antenna size. Two types of feeding techniques, direct-connected feed and parallel-coupled feed, are used in the resonators. The centre frequencies and bandwidths of the individual notches can be adjusted independently using the dimensions of the corresponding MLs. For verification, the proposed antenna is also fabricated and measured. The return loss, peak gain, efficiency and radiation pattern of the band-notch antenna are studied using both computer simulation and measurement. The pulse responses of the band-notched antennas are also measured and compared with those of single-, double- and triple-band-notch antennas.