Comparative design evaluation demonstrates wide impedance bandwidth and high gain in a cavity-backed patch antenna, indicating multi-band support across 1.7 to 2.5 GHz communication bands.
A wideband cavity-backed patch antenna is presented for operating at PCS, IMT200, and 2.4 GHz WLAN bands. A parasitic patch and a probe with a capacitor patch is used to enhance the bandwidth. The cavity-backed and without cavity-backed antenna has been compared. It has been found that the cavity backed antenna has wide impedance bandwidth of 43% and high gain level. It can simultaneously serve most of the modern wireless communication applications that operate at 1.7 GHz-2.5 GHz.
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Wang et al. (2007) studied this question.
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