Ultra‐wideband tapered slot antenna with dual band‐notched characteristics

Abstract

A novel tapered slot antenna (TSA) with 3.5/5.5 GHz dual band‐notched characteristics for ultra‐wideband radios is proposed in this study. To realise dual band‐notched characteristics at the TSA, the author employ (a) a pair of nested C‐shaped stubs beside the feed line and (b) a broadband microstrip‐slotline transition with an Archimedean spiral‐shaped slot. The proposed antenna has been successfully simulated, implemented and measured. Measured data for the optimised case show the bandwidth for the voltage standing wave ratio < 2 to be 9.2 GHz (from 2.4 to 11.6 GHz) with two notched bands of 3.1–4.0 GHz (world interoperability for microwave access band) and 5.1–6.2 GHz (wireless local area network band), respectively. The measured electrical parameters of the proposed antenna and its radiation patterns show excellent performance with good pulse handling capabilities. Also, the 3.5/5.5 GHz dual band‐notched characteristics are achieved without increasing the size of the single band‐notched TSA reported previously.