High gain UWB antenna array of partial conductor backed-coplanar waveguide (PCB-CPW) with coaxial fed for microwave imaging
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Date
2020Author
M. A. Jamlos
M. F. Jamlos
A. H. Ismail
Amirah Othman
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In this paper, a partial conductor backed-coplanar waveguide (PCB-CPW) UWB antenna
array is proposed, which consists of four identical circular patches appropriately connected
using quarter wave transformer transmission line. Currently full CB-CPW technique is used
in realizing UWB high gain antenna. However, the combination of partial conductor back
and array technique with coaxial fed is yet to be explored for the same purpose. The novel
proposed antenna is designed with PCB-CPW using circular array radiating element and
coaxially fed in producing UWB antenna with higher and acceptable gain compared to full
CB-CPW technique. This is proved by achieving excellent impedance matching (<-10 dB)
across the band of 2.6 GHz up to 13.1 GHz. In addition, the gain obtained across the whole
operated frequencies is ranging from 3.4 dB until 12.12 dB. Considering the compactness of
80 mm × 45 mm, the performance of proposed antenna with coaxially fed making it a
suitable candidate for portable and efficient systems for microwave-based brain imaging as
the scanning probe.