Compact Planar UWB Patch Antenna with Integrated Bandpass Filter & Band Notched Characteristics

Abstract

In this paper, a band-notched planar Ultra wideband (UWB) patch antenna with integrated band pass filter for UWB systems is presented. It is designed on a dielectric substrate and fed by a 50 Ω micro strip line, antenna consists of a square slot patch with a vertical coupling strip monopole, and a partial ground plane and feeding line with band pass filter has been demonstrated to provide an ultra wide 10dB return loss bandwidth and insertion loss with satisfactory radiation properties. The parameters that affect the performance of the antenna in terms of its frequency domain characteristics are investigated. The proposed antenna is easy to integrate with microwave circuitry for low manufacturing cost. The proposed antenna has a compact structure and the total size is 15×14.5mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . The antenna design is simulated on electromagnetic (EM) simulation software using FR-4 substrate with dielectric constant of 4.4 and thickness of 1.6 mm. The simulated antenna has operating frequency band of 3.098-10.61 GHz and show the band-notch characteristic in the UWB band to avoid interferences, which is caused by WLAN (5.15-5.825 GHz) and WiMAX (5.25-5.85 GHz) systems. The simulation result shows the close agreement. The antenna structure is flat, and its design is simple and straightforward geometrically small, hence embedded easily in wireless communication systems.