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Available from: John C Batchelor, Oct 07, 2015
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    • "For decades, there have been efforts to design and develop various types of wideband antennas, for instance planar monopole, bow-tie, and spiral antennas [1]–[3]. Generally, the main concern has been to achieve wide impedance bandwidth and a stable omnidirectional radiation pattern. "
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    ABSTRACT: This communication presents a bandwidth enhanced, compact, monopole loop antenna with modified ground plane for modern automotive ultra wide -band (UWB) applications. The proposed loop antenna has hybrid geometry and is constructed using half circular ring and half square ring.The ground plane of the fundamental radiator is curved and defected to improve the VSWR bandwidth. An extended ground stub is added to further enhance the bandwidth to suit the modern automotive requirements. The designed antenna covers 3.1– 10.9 GHz frequency spectrum with VSWR ≤ 2. This antenna can be conveniently placed inside the shark fin housing on the vehicle’s roof or it can be printed along with the existing Print Circuit Board (PCB) electronics nullifying the need for dedicated location on vehicle’s body for in-car communications. Further, a simple 2 port Multiple Input Multiple Output (MIMO) antenna is constructed and its diversity performance is estimated. The prototype is fabricated and tested for impedanceand radiation characteristics.
    IEEE Transactions on Antennas and Propagation 06/2015; 63(9). DOI:10.1109/TAP.2015.2447006 · 2.18 Impact Factor