Design and analysis of a novel wide-angle scanning stub-loaded cavity array element

peer-reviewed
Erstveröffentlichung
2022-07-12Authors
Chaloun, Tobias
Grüner, Patrik
Menzel, Wolfgang
Wissenschaftlicher Artikel
Published in
IEEE Open Journal of Antennas and Propagation ; 3 (2022). - S. 783-797. - eISSN 2637-6431
Link to original publication
https://dx.doi.org/10.1109/OJAP.2022.3190219Faculties
Fakultät für Ingenieurwissenschaften, Informatik und PsychologieInstitutions
Institut für MikrowellentechnikDocument version
published version (publisher's PDF)Abstract
A novel design methodology is presented to mitigate scan blindness in cavity antenna arrays without the need for any changes on the radiating structure itself. For a first proof-of-concept demonstration, a fully PCB-compliant dual-polarized cavity element is loaded by vertical stubs to manipulate the dispersion characteristics in the aperture plane. In contrast with its conventional cavity antenna counterpart, the proposed stub-loaded unit cell element shows through scattering and eigenmode analysis that the vertical stubs may effectively enhance the antenna’s wide-angle scan performance by preventing the onset of surface and leaky wave resonances. Owing to this additional design freedom, an element gain improvement of at least 1 dB is achieved, due to a truly TE and TM mode-free characteristic along the lateral directions. A dual-polarized 11 × 11 array prototype was implemented. The measurement results are in very good agreement with those obtained by full-wave simulations. The realized stub-loaded cavity element exhibits reflection coefficients lower than −10 dB with a very low inter-port coupling <−40 dB across the frequency range from 26.8 GHz to 32.7 GHz. Moreover, the co-polarized embedded elements are close to the ideal cos( ϑ )-pattern for 60° E- and H-plane scans from 28 GHz to 31.5 GHz without oversampling the aperture.
EU Project uulm
FLEXWIN / FLEXIBLE MICROSYSTEM TECHNOLOGY FOR MICRO- AND MILLIMETRE-WAVE ANTENNA ARRAYS WITH INTELLIGENT PIXELS / EC / FP7 / 257335
DFG Project THU
Planare Gruppenantennen mit elektronisch rekonfigurierbarer Apertur / DFG / 444833493 [CH 2226/2-1]
Subject headings
[GND]: Schlitzantenne[LCSH]: Antenna arrays | Holes | Slot antennas
[Free subject headings]: Phased arrays | Antennas | Apertures | Periodic structures | Planar arrays | Planar phased arrays | Dual-polarized cavity antenna | Scan blindness | SatCom on the move
[DDC subject group]: DDC 620 / Engineering & allied operations
Metadata
Show full item recordDOI & citation
Please use this identifier to cite or link to this item: http://dx.doi.org/10.18725/OPARU-48851
Chaloun, Tobias; Grüner, Patrik; Menzel, Wolfgang (2023): Design and analysis of a novel wide-angle scanning stub-loaded cavity array element. Open Access Repositorium der Universität Ulm und Technischen Hochschule Ulm. http://dx.doi.org/10.18725/OPARU-48851
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