Title :
Balanced dual-segment cylindrical dielectric resonator antennas for ultra-wideband applications
Author :
Majeed, Asmaa H. ; Abdullah, Abdulkareem S. ; Sayidmarie, Khalil Hassan ; Abd-Alhameed, Raed A. ; Elmegri, Fauzi ; Noras, James M.
Author_Institution :
Dept. of Electr. Eng., Basrah Univ. ., Basrah, Iraq
Abstract :
This study reports on balanced dual-segment cylindrical dielectric antennas with ultra-wideband (UWB) operation. A T-shaped slot and L-shaped microstrip feeding line was suggested to furnish a balanced coupling mechanism for feeding two DRAs, and then the performance of the proposed antenna was analysed and optimised against the target frequency band. The proposed antenna was then modified by adding a C-shaped strip to increase the gain. The performances of both balanced antennas were characterised and optimised in terms of antenna reflection coefficient, radiation pattern, and gain. The antennas cover the frequency range from 6.4 to 11.736 GHz, which is 58.7% bandwidth. A maximum gain of 2.66 dB was achieved at a frequency of 7 GHz with the first antenna, with a further 2.25 dB increase in maximum gain attained by adding the C-shaped strip. For validation, prototypes of the two antennas were fabricated and tested. The predicted and measured results showed reasonable agreement and the results confirmed good impedance bandwidth characteristics for UWB operation from both proposed balanced antennas.
Keywords :
antenna feeds; antenna radiation patterns; antenna testing; dielectric resonator antennas; electromagnetic wave reflection; microstrip antennas; microwave antennas; slot antennas; ultra wideband antennas; DRA; L-shaped microstrip feeding line; T-shaped slot antenna; UWB operation; antenna reflection coefficient; antenna testing; balanced coupling mechanism; balanced dual-segment cylindrical dielectric resonator antenna; c-shaped strip; frequency 6.4 GHz to 11.736 GHz; gain 2.25 dB; gain 2.66 dB; radiation pattern; ultrawideband application;
Journal_Title :
Microwaves, Antennas Propagation, IET
DOI :
10.1049/iet-map.2015.0221