Low-Pass Filter Implementation Using CPW-Fed UWB Antenna

Abstract

In this paper, a wideband co-planar waveguide (CPW) fed antenna design is proposed and simulated on a dielectric substrate FR4 epoxy having a relative permittivity of 4.4 and height of 1.6 mm. A novel design for the low pass implementation is presented with the help of defected ground plane CPW antenna. Current distribution and return loss is used to verify the low pass implementation in simulation. The co-planar waveguide provides easier integration with active and passive elements and it provides flat transitional impedance for improved matching. Current distributions verify the low-pass implementation in the antenna. S11is shown for the verification of cutoff frequency, bandwidth and level of rejection. The proposed structure is simulated in HFSS software. Simulated return loss is below −10 dB for ultra wideband (UWB) lower frequencies. This proposed antenna is useful for wireless communication applications working within UWB spectrum, i.e., GPS, GSM and WLAN spectrum.