Filtering Antenna Array Based on Corrugated Vivaldi Elements

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023-08-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
12
6546-6557
Series
IEEE Transactions on Antennas and Propagation, Volume 71, issue 8
Abstract
This paper presents a band-pass filtering antenna array based on corrugated Vivaldi antenna elements and finline waveguides. The low-pass section of the filtering antenna element is realized by periodically corrugating the inner edges of the Vivaldi elements. The structure can be considered as a periodic transmission line that inherently acts as a low-pass filter. The high-pass section of the filtering element is realized by surrounding the corrugated slotline with a waveguide. The resulting antenna structure, a finline-fed Vivaldi element, exhibits a wide 1.2–3.1 GHz band-pass response with the upper band-stop rejection exceeding 20 dB up to 6 GHz. The filtering properties are almost independent of the scan angle. The active reflection coefficient is <-10 dB with beam-steering angles within θ = ±60° in the E- and D-planes, and <-6 dB in the H-plane. The operation of the filtering antenna element is confirmed by periodic unit-cell simulations and measuring a manufactured 6×6 array prototype.
Description
Keywords
Antenna arrays, Filtering, Band-pass filters, Low-pass filters, Slot lines, Slot antennas, Stripline
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Citation
Kuosmanen, M, Holopainen, J, Ala-Laurinaho, J, Kiuru, T & Viikari, V 2023, ' Filtering Antenna Array Based on Corrugated Vivaldi Elements ', IEEE Transactions on Antennas and Propagation, vol. 71, no. 8, 10137447, pp. 6546-6557 . https://doi.org/10.1109/TAP.2023.3278879