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The design process of dual-band reconfigurable PIFA antenna is introduced and investigated. The design procedure is based on loading a lumped capacitor (or varactor) at one fixed location along a slot of the radiator. The changes in first and second resonances are significantly quite similar and almost cover the entire dual-band operation, with considerable frequency ratio tuning range. The proposed...
This paper presents a band-suppressed PIFA antenna for UWB application using spiral slot. The modeling of the antenna geometry structures and the optimisation of the full antenna assembly was carried out in the frequency and time domains using Ansoft HFSS and CST respectively for comparison. The impedance bandwidth for reflection coefficient |S11| less than -10 dB covers the range from 3 GHz to 12...
This paper examines the case for an ultrawideband planar inverted-F-L-antenna design intended for use in the lower sub-band. The antenna construction is based on the conventional inverted F, and inverted L as its feed element, and parasitic element, respectively. The optimized antenna size is 30×15×4mm3. The prototype antenna has a good return loss of -10 dB, and a 66.6% impedance bandwidth (2.8 GHz-5...
A novel, miniaturised, planar inverted FF antenna (PIFFA) assembly is presented. The antenna design electromagnetically couples two PIFA antennas on an air substrate, and employs a broadband rectangular plate feeding mechanism to achieve an ultra-wideband characteristic. The dimensions of the complete prototype assembly are 30 ?? 15 ?? 8 mm. Good agreement is obtained between computed and measured...
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