A dual-band circularly-polarized patch antenna with a novel asymmetric slot for WIMAX application

• Main Authors: Noghabaei, S. M., Abdul Rahim, Sharul Kamal, Soh, Ping Jack, Abedian, Mohammad, Vandenbosch, Guy A.E.
• Format: Article
• Language: English
• Published: 2013
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.utm.my/id/eprint/50284/1/SharulKamalAbdul2013_Adual-bandcircularly-polarized.pdf; http://eprints.utm.my/id/eprint/50284/; https://www.radioeng.cz

A compact design of a circularly-polarized (CP) microstrip antenna to achieve dual-band behavior for WiMAX applications is presented. A single-layered feed is used to excite a single square patch integrated with a novel asymmetrical slot and two different truncated corners to achieve CP polarization in both bands. Besides its structural simplicity, ease of fabrication and low cost, the proposed antenna features a satisfactory impedance bandwidth of 7.2 % in the lower band (2.53 GHz) and 3.6 % in the upper band (5.73 GHz). The measured radiation pattern of the proposed antenna demonstrates directional patterns in both E- and H-planes with a 3 dB axial ratio of 2 % and 3.2 % in the lower and upper band, respectively