Open AccessBalanced dual‐segment cylindrical dielectric resonator antennas for ultra‐wideband applications
Author(s) -
Majeed Asmaa H.,
Abdullah Abdulkareem S.,
Sayidmarie Khalil Hassan,
AbdAlhameed Raed A.,
Elmegri Fauzi,
Noras James M.
Publication year - 2015
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2015.0221
Subject(s) - dielectric resonator , wideband , dielectric , resonator , dual (grammatical number) , dielectric resonator antenna , directional antenna , materials science , acoustics , optics , electronic engineering , physics , optoelectronics , computer science , telecommunications , engineering , antenna (radio) , art , literature
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.