Ultra widband high gain antenna with band notch characteristics

Abstract

Ultra-wideband (UWB) antennas are one of the most important elements for UWB systems. With the release of the 3.1 - 10.6 GHz band, applications for short-range and high-bandwidth handheld devices are primary research areas in UWB systems. Therefore, the realization of UWB antennas in printed-circuit technologies within relatively small substrate areas is of primary importance. In this project the design of high gain antenna for UWB applications with band notch characteristics has been covered. The design intends to cover entire UWB specified by FCC i.e. 3.1-10.6 GHz with desired band notch capability. Initially an antenna has been designed which operated at a small bandwidth than various bandwidth enhancement techniques have been used to enhance its operating bandwidth. These techniques include corner truncation, partial grounding and inset feeding. Efforts have also been put in to increase the gain of the designed antenna using different substrates and by increasing the radiating area of the antenna while keeping the overall size of antenna compact. A detailed analysis of the obtained antenna parameters has been carried out and efforts are made to obtain best possible antenna efficiency parameters which include bandwidth, gain, return loss and VSWR. The fabrication and lab testing of the designs have been carried out. To prevent interference problems due to existing nearby communication systems operating within ultra wideband (UWB) frequency range, the significance of an efficient band-notched design has increased many folds.