A circular microstrip-fed single-layer single-slot antenna for multi-band mobile communications

Abstract

In this paper, we study a circular microstripline-fed single-layer single-slot antenna. In Ms case, a modified circular microstrip feedline leads to good impedance matching in a wide dual band. The 10-dB return loss impedance bandwidth is 50.8% for cellular (0.824-0.96 GHz) and GSM (0.86-0.88 GHz) operations, and is 37.1% for DCS (1.71-1.88 GHz), PCS (1.85-1.99 GHz), and IMT-2000 (1.90-2.20 GHz) operations. We obtain the result for the return loss of exhibited multi-band characteristics. The peak antenna gain is 4.61 dBi and 3.80 dBi for the lower (cellular and GSM) and upper (DCS, PCS. and IMT-2000) bands, respectively. © 2003 Wiley Periodicals, Inc.