Title :
A wideband single fed circularly polarized slot antenna for multi-band applications
Author :
Kwame, Oteng Gyasi ; Ellis, Mubarak Sani ; John, Kponyo Jerry
Author_Institution :
Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, a single fed wideband circularly polarized slot antenna is proposed for multiband applications. The antenna consists of a rotated hexagonal slot with a parasitic patch placed in the slot which also has a thin slot in its center. The antenna has a feed-line offset which in addition to the parasitic stubs produce the two near degenerate orthogonal modes required for circular polarization. Simulation results have shown that the proposed antenna can achieve an operational bandwidth of 1.6-3.08 GHz for reflection coefficients below -10 dB representing a bandwidth of 60.4 % and an axial ratio below 3 dB between 2.04 GHz and 2.68 GHz. This represents an axial ratio bandwidth of 26.1 % with respect to the center frequency which was chosen as 2.45 GHz. The proposed antenna has a small size of 58 mm × 58 mm, a wide operational bandwidth and a wide 3 dB axial ratio bandwidth. This antenna can be used for wireless applications like RFID/UMTS/WLAN/WiMAX.
Keywords :
UHF antennas; antenna feeds; broadband antennas; microstrip antennas; microwave antennas; multifrequency antennas; slot antennas; RFID; UMTS; WLAN; WiMAX; bandwidth 1.6 GHz to 3.08 GHz; circularly polarized slot antenna; feed-line offset; multiband applications; orthogonal modes; parasitic patch; parasitic stubs; reflection coefficients; rotated hexagonal slot; single fed antenna; thin slot; wideband antenna; wireless applications; Broadband antennas; Microstrip antennas; Polarization; Slot antennas; Wideband; circular polarization (CP); slot antenna; wideband antenna;
Conference_Titel :
Instrumentation and Measurement, Sensor Network and Automation (IMSNA), 2013 2nd International Symposium on
Conference_Location :
Toronto, ON
DOI :
10.1109/IMSNA.2013.6743353
