Abstract
A novel method for tri-band microstrip array antenna with improvement in the bandwidth by incorporating wide slots and additional resonators which is gap-coupled to the non-radiating edges of a radiating element is presented. The experimental results show that two element slot-loaded gap-coupled microstrip array antenna gives a ?10 dB return loss band-width for three bands. The design specifications, radiation patterns and gain of the proposed antennas are presented and described.
Highlights
This template Demand for compact and multifunctional wireless communication systems has spurred the development of multi-band and wide-band antennas with small size
A novel method for tri-band microstrip array antenna with improvement in the bandwidth by incorporating wide slots and additional resonators which is gap-coupled to the non-radiating edges of a radiating element is presented
The second band is due the fundamental resonance of the first element excited through corporate feed network, as it is resonating at 9.84 GHz proves that the impedance is matching to 50 Ω
Summary
This template Demand for compact and multifunctional wireless communication systems has spurred the development of multi-band and wide-band antennas with small size. Microstrip patch antennas are widely used as they offer compactness, low profile, light weight and economical efficiency. The microstrip patch antenna is limited by its narrow operating bandwidth. There are numerous and well known methods to increase the bandwidth of microstrip patch antennas, including increase in the substrate thickness, the use of a low dielectric substrate [1], the use of various impedance matching and feeding techniques [2], the use of multiple resonators [3] [4] [5] [6] and the use of slot antenna geometry [7].
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