Design strategies and performance evaluation of reconfigurable notch filtering in UWB Vivaldi Antennas

Physica Scripta. 2025. Vol. 100. No. 2. Article 025532.

Kumar S., Khandelwal M. K., Yelizarov (Elizarov) A. A., Sharma U., Sharma V.

This paper presents a frequency reconfigurable notch band enabled Vivaldi Antenna for ultrawideband
(UWB) applications. The proposed antenna structure features a fork shaped patch
embedded with a PIN diode. Patch is fed with a triangular tapered feed line and supported by a novel
shaped Vivaldi ground plane consisting two exponentially tapered fins adjoining with a triangular slot.
The antenna design shows a−10 dB impedance bandwidth ranging 2.17–10.97 GHz with a notch
band between 4.94–5.11 GHz. With the help of BAR64 PIN diode reconfigurable notch band is
achieved at 5.0 GHz frequency. Moreover, this notch frequency can be shifted to the desired frequency
by adjusting the feed settings and location of the diode. The idea behind this design is to introduce a
simple design, independently controlled notch parameters, simple switching operation, and high gain
abilities. The developed antenna exhibits steady unidirectional radiation patterns and a peak gain of
9.3 dBi with noticeable decreases at the notched band. Almost stable gain is observed betweenUWB
frequency range of 3.1–10.6 GHz, gain is varying from 7.05 dBi to 8.3 dBi and only 1.25 dBi gain
variation is observed within this range of frequency. The simulated and fabricated results showcase a
close agreement with each other. The proposed antenna improves wireless communication
performance, meeting the growing demand for dependable and interference-resistant solutions.

Keywords: frequency reconfigurable antenna, tunable notch band, ultra-wideband, vivaldi antenna

Publication based on the results of: Исследование технологий и устройств пучково-плазменных усилительных приборов для создания высокоскоростных инфокоммуникационных сетей и киберфизических систем в миллиметровом и субмиллиметровом диапазонах (2025)