Studies of corrugated antipodal vivaldi wideband antenna with notched band and rectenna integration

• The AVA rectenna achieves an S₁₁ below –10 dB from 2.38 GHz to beyond 20 GHz, with a 300 MHz bandwidth gain using two corrugations. • At 2 GHz, AVAs with three and four corrugations reach 5.73 dBi directivity (vs. 2.9 dBi without corrugation), while deeper corrugations boost gain from 3.05 to 9 dBi. • The notched band shifts to lower frequencies with longer spiral strips, enabling precise rejection band control. • Higher-stage rectifiers yield greater output voltages, enhancing overall rectenna efficiency. A wideband rectenna based on a Corrugated Antipodal Vivaldi Antenna (AVA) with a notched band is proposed for energy harvesting applications. The antenna performance is studied parametrically by varying the corrugated and rectangular spiral slot (RSS) structures and also by integrating the antenna with a rectenna for energy harvesting applications. The AVA rectenna achieves an S ₁₁ of less than -10 dB from 2.38 GHz to beyond 20 GHz. An AVA with two corrugations at the lower position of the radiator increases the bandwidth by 300 MHz compared to an AVA without corrugation. At 2 GHz, AVAs with three and four corrugations exhibit a directivity of 5.73 dBi, compared to 2.9 dBi for an AVA without corrugation. Increasing the corrugation depth enhances the gain, ranging from 3.05 dBi to 9 dBi. The notched band shifts to lower frequencies as the spiral strip slot lengthens, so we can set the desired notched band by adjusting the length and position of the RSS. Furthermore, Integration of a rectangular spiral slot (RSS) enables tunable notched bands, providing flexibility to reject interference from unwanted frequency ranges. The agreement between simulation and measurement confirms that the proposed AVA rectenna is also a strong candidate for wideband energy harvesting applications.