A Fully Integrated Filtering Vivaldi Antenna with High Selectivity and Wide Out-of-Band Suppression

This paper introduces a novel filtering approach that employs integrated periodic structures with a conventional Vivaldi antenna to achieve a fully integrated bandpass filtering antenna. The approach results in a wide out-of-band suppression, high passband selectivity, adjustable operational bandwid...

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Bibliographic Details
Published in:IEEE access 2024-01, Vol.12, p.1-1
Main Authors: Emadeddin, Ahmad, Jonsson, B. L. G.
Format: Article
Language:English
Subjects:
Antenna radiation patterns
Antennas
Band-pass filters
Bandpass filters
Bandwidth
Bandwidths
filtenna
Filtering
Filtering antenna
Frequency ranges
fully integrated antenna design
Insertion loss
metasurface
out-of-band suppression
Passband
Periodic structures
Reflectance
Slot antennas
Vivaldi antennas
wideband antenna
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Summary:This paper introduces a novel filtering approach that employs integrated periodic structures with a conventional Vivaldi antenna to achieve a fully integrated bandpass filtering antenna. The approach results in a wide out-of-band suppression, high passband selectivity, adjustable operational bandwidth, and low insertion loss. The proposed filtering approach maintains the original size of the conventional Vivaldi antenna (base antenna) without requiring additional modifications. To validate the approach, we present two filtering Vivaldi antennas: filtering antenna I (center frequency: 18GHz, fractional bandwidth: 21%, insertion loss: 0.32dB) and filtering antenna II (center frequency: 6.5GHz, fractional bandwidth: 12%, insertion loss: 0.6dB). Their wide out-of-band gain suppression (typically ≥15dB) covers the conventional Vivaldi antenna's frequency range (4-24GHz). A prototype of the filtering antenna I is manufactured. Its measurement results validate the proposed approach and show good agreement with the simulated reflection coefficient, realized gain, and radiation patterns. The features of the proposed filtering antenna approach, make it suitable for various applications requiring efficient frequency filtering.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2023.3348751