Abstract
This paper presents a compact planar ultra-wideband (UWB) microstrip antenna for microwave medical applications. The proposed antenna has a low profile structure, consisting of a modified radiating patch with stair steps and open slots, microstrip feed line, and T-like shape slots at the ground plane. The optimized antenna is capable of being operated in frequency range of 3.06–11.4 GHz band having good omnidirectional radiation pattern and high gain, which satisfies the requirements of UWB (3.1–10.6 GHz) applications. The antenna system has a compact size of 18×30×0.8mm3. These features make the proposed UWB antenna a good candidate for microwave medical imaging applications.
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