Ultra-Wideband Compact Ring Sector Printed Monopole Antenna

A novel compact ultra-wideband circular ring sector printed monopole antenna with decreasing Sectoral angle and modified feeding structure is proposed. A detailed parametric study for Sectoral angle decreasing from equivalent circular monopole patch to 3300 ring Sector up till 600 ring Sectoral patch is presented. With decreasing angle ultra-wide band response with increasing lower frequency of the realized bandwidth is obtained in all the Sectoral patches. For Sectoral angle of 90 degrees, an optimum response with offset feeding structure is realized. All the proposed Sectoral configurations yield bandwidth from less than 3 GHz to more than 10 GHz, thereby covering entire ultra-wide band frequency range. The proposed configurations yields gain of more than 1 to 2 dBi over the entire ultra-wide band frequency range.