Design of a bandwidth enhanced hybrid slot loop antenna for GSM/UWB standards

Abstract

Purpose

This paper aims to presents the bandwidth enhancement of a hybrid slot–loop antenna using a modified feed structure.

Design/methodology/approach

The conventional monopole feed of the hybrid slot–loop radiator is loaded with a flat microstrip patch to excite higher-order modes. The proposed antenna combines the resonant modes of the slot antenna, the loop antenna and the patch loading.

Findings

The antenna exhibits a dual-band response suitable for GSM 1800/1900 and ultrawideband (UWB) standards. The impedance bandwidth extends from 1.65 to 1.95 GHz (11.42 per cent) and 3 to 11.1 GHz (114.9 per cent). The proposed antenna has the smallest footprint with a peak gain of 5.07 dBi at 1.8 GHz and 4.97 dBi at 6 GHz. The prototype antenna is fabricated and the simulation results are validated using experimental measurements. The performance of the bandwidth-enhanced hybrid slot–loop antenna is compared with that of other slot antennas.

Originality/value

Thus, a hybrid slot–loop antenna with an enhanced bandwidth has been reported in this study. The conventional monopole feed of the antenna is replaced with a monopole ending with a microstrip patch load. The antenna covers the operating bands of GSM 1800/1900 and UWB. The proposed antenna has a smaller footprint compared with other wide-slot antennas reported in the literature.

Citation

B., P., M., G.N.A. and Rajakani, K. (2017), "Design of a bandwidth enhanced hybrid slot loop antenna for GSM/UWB standards", Circuit World, Vol. 43 No. 3, pp. 105-110. https://doi.org/10.1108/CW-03-2017-0009