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A wideband planar antenna with unidirectional characteristics is demonstrated based on the monopole slot antenna. By utilizing a stub-protruded feedline and adding two symmetrical stubs at the slot edge, the impedance-matching condition is improved. The resonance frequency of the monopole slot antenna is significantly shifted down, and the impedance bandwidth is enlarged. By changing the width of...
A design procedure for a wideband planar unidirectional antenna is presented based on the monopole slot antenna. Owing to the additional capacitance contributed by a stub-protruded feedline and two symmetrical stubs at the slot edge, the impedance-matching condition is improved; meanwhile, the resonance frequency of the monopole slot antenna is significantly shifted down, and an improvement in impedance...
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