In this article, a new U‐shaped dielectric resonator antenna (DRA) for
broadband applications is proposed. The antenna consists of a modified stepped
CPW trimmed to excite the U-shaped dielectric resonator with a relative
dielectric constant of 10.2. A parasitic strip along the other side of the DRA
is joined to the coplanar waveguide structure acts as tuning element for the
antenna frequency band. The proposed
antenna is designed using the FR4 substrate of 4.6 relative dielectric constant
and 1.6 mm thickness. The antenna is designed, analyzed, and optimized using a
full-wave electromagnetic simulator. The results reveal that the proposed DRA
has an impedance bandwidth for VSWR<2 from (3.22‐5.92) GHz with 59 % bandwidth efficiency. The
antenna operating band covers the IEEE 802.11 and many bands of wireless
systems like C-band, 5.2, 5.5 & 5.8 GHz-WLAN and WiMAX. The antenna
provides a stable quasi-omnidirectional radiation pattern in the H plane and bidirectional
radiation pattern in the E plane with a gain ranging from (2.5- 4.6) dB across
the operating bandwidth. The proposed antenna could be also used for lower
European UWB frequency band (3.4‐5.0) GHz applications and for medical microwave
imaging purposes. The overall dimension of the antenna is 26mm×32mm×1.6mm and
the thickness of the dielectric resonator is only 8.12 mm; so, the antenna can
be categorized as a compact size and low profile antenna.
Primary Language | English |
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Subjects | Engineering |
Journal Section | Articles |
Authors | |
Publication Date | July 25, 2019 |
Published in Issue | Year 2019Volume: 6 |