A Modified Leaf Shaped Antipodal Vivaldi Antenna for UWB Applications

Here, a novel and compact modified leaf shaped antipodal Vivaldi antenna is presented for displaying explicitly broadband with multi-band functionalities. With persistence to that, it is operative at IEEE S-Bands (2.4 GHz with a bandwidth of 900 MHz), IEEE C-Bands (7.7 GHz with a bandwidth of 1700 MHz) and IEEE X-Bands (10.6 GHz with a bandwidth of 1300 MHz). GA was implemented as the EM parameter optimization method, where dimensions of MLSAVA were further optimized to 30%, without compromising out its operational benefits with concise to absolute miniaturization, before getting fabricated. It is fabricated on FR-4 substrate with epsilon value of 4.4 and a height of 1.6 mm, with a dimension of 30 × 25 mm2and operates from 2–12 GHz, covering a −10 dB impedance bandwidth of 10 GHz. The proposed antenna has low cross-polarization level ( 5 dBi) over frequency range (2–12 GHz). The simulated results & measured outcomes are in good agreement with each other. So, proper validation is presented in terms of initial design, simulation by EM solver, fabrication and most importantly its characterization.