A Compact Multiband Rectangular Microstrip Antenna for UWB Applications

Abstract

This manuscript develops the design of rectangular patch antenna with loaded on defected ground structure (DGS), which covers the entire range of ultra-wideband (UWB). The area of proposed antenna 33?35 mm2 and is printed on FR-4 plane substrate, its permittivity (r) 4.2 and loss tangent (tanδ) is 0.02 at entire frequency range. Proposed structure renders wider impedance bandwidth extended from 2 GHz to 10.7 GHz at < -10 dB return loss (VSWR< 2) with multi-bands. The UWB antenna suitable for UMTS 2.1 GHz, WLAN 3.5 GHz, WiMAX 5.8 GHz, and X-band 7.5 GHz applications. The parameters of antenna such as loss of return are reduced, and width of band, as well as gain in VSWR, is improved to an acceptable limit with reasonable radiation pattern by means of CST V.17 EM simulator. The results from simulation and experiment results are almost similar to acceptable limit.