Design and Analysis of UWB Antenna with Triple Band Notched Characteristics Verified with TCM Analysis

A triple band notched inveterd L-strip loaded to truncated ground flower shaped Ultra Wide-Band (UWB) antenna integrated with K u band applications is discussed in the present work. The working region of the antenna is 3.3–14.3 GHz with notched bands 3.7–4.6 GHz, 5.1–5.95 GHz and 7.1–8.2 GHz. The proposed antenna covers the UWB region, partial K u band applications with excudation of 3.7–4.2 GHz (C-band satelllite downlink), 5.15–5.85 GHz (WLAN) and 7.25–7.75 GHz(X-band satellite downlink) frequency regions. The triple notch characterisitcs are obtained using L-strip loaded slot and truncated ground shape. The resultant efficiency values of the antenna are above 80% except notched bands. At notched bands, the efficiency values are around 24%, 18% and 20% are achieved. The peak gain values are above 2.8 dBi in entire working region of the antenna and maximum gain of 4.7 dBi is attained. And, at nocthed bands, the gain values are − 1.8 dBi, − 1.6 dBi and − 2.0 dBi are achieved. The radiation patterns on E and H planes are simulated and checked the same with measured results. The proposed antenna working region is checked with theory of characteristic mode (TCM) analysis in order to validate the performance of the proposed antenna by studying various modal parameters like modal significance and characteristic angle. The paramteric analysis of the antenna at notched bands is performed in order to arrive at the design considerations. The suraface current distribution of proposed antenna at various frequencies and checked the same at notched band. The time response characteristics of proposed antenna is anlysed with results of group delay response.