Ultrawideband Antenna Combined with a Reconfigurable Stop-Band Filter for Medical Imaging Detection Applications

In this paper, a ultrawideband antenna combined with a reconfigurable stop-band filter for medical imaging detection applications is presented. The proposed antenna provides dual-band operation at 1.8–3.2 GHz and 4–6.2 GHz, which satisfies widely the bandwidth for ISM application systems.These bands are achieved by the introduction of an open square ring on the top side and a pair of square of CSRRs on the ground, respectively. Equivalent circuit of the filter has been presented using ADS simulator. Its performance results have been compared to those obtained with CST simulator. The results of both methods show reasonably good agreement in terms of the frequency of operation and the impedance bandwidth. The study of the antenna properties is also taken into account. The resulting design has a compact configuration and enables easy control of the two desired operating frequencies. This proposed antenna is matched with $$50\Omega $$ to allow an easier connection. To validate the proposed concept, a prototype was fabricated and measured. The experimental results are presented and discussed. The obtained results show a good agreement between experimental and simulation results.

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