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Design of a Novel UWB Microstrip Antenna with SIW Feed

By Abbas Ebrahimi and Hamid Khodabakhshi
Progress In Electromagnetics Research M, Vol. 64, 87-97, 2018


Antenna miniaturization, which is a requirement of modern wireless communication systems, is usually concomitant with the reduction of impedance bandwidth. On the other hand, small antennas should also possess stable radiation patterns across a broad frequency band, such as in UWB systems. In this paper, we propose a UWB antenna structure with a novel feeding system composed of an open cavity resonator. It has a wide relative bandwidth (of about 120%) particularly at the lower frequency limits. The variation of radiation pattern across its operating bandwidth is also negligible. The proposed antenna with the novel feed system is smaller and has a wider frequency bandwidth than other available UWB antennas in the literature. Furthermore, another antenna is proposed, which has a feeding system composed of a surface integrated resonator cavity, fabricated on a two-layer microstrip structure. It has achieved better miniaturization and bandwidth, albeit somewhat lower gain. Three prototype models of the proposed antennas are fabricated and measured, of which the frequency response is in excellent agreement with computer simulation results.


Abbas Ebrahimi and Hamid Khodabakhshi, "Design of a Novel UWB Microstrip Antenna with SIW Feed," Progress In Electromagnetics Research M, Vol. 64, 87-97, 2018.


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