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Sub-THz Conformal Lens Integrated WR3.4 Antenna for High-Gain Beam-Steering

Bhutani, Akanksha ORCID iD icon 1; Dittmer, Joel 2; Valenziano, Luca ORCID iD icon 1; Zwick, Thomas 1
1 Institut für Hochfrequenztechnik und Elektronik (IHE), Karlsruher Institut für Technologie (KIT)
2 Institut für Photonik und Quantenelektronik (IPQ), Karlsruher Institut für Technologie (KIT)

Abstract:

This paper demonstrates the first conformal lens-integrated rectangular waveguide antenna that achieves high-gain beam-steering in the sub-THz range of 230 GHz to 330 GHz, to the best of the authorsf knowledge. The antenna consists of a 2×32 array of elliptical slots (E-slots) fed by a standard WR3.4 rectangular waveguide, ensuring that the antenna operates in its dominant TE10 mode. The E-slots are spaced by less than half of the guided wavelength, which causes them to be fed with a constant phase difference, thus leading to a progressive phase shift along the antenna aperture. Consequently, the antenna main lobe steers from -71° to -16° as the operating frequency varies from 230 GHz to 330 GHz, respectively. The WR3.4 antenna gain is enhanced by integrating it with a conformal plano-convex parabolic lens. The conformal lens is designed taking into consideration the phase center of multiple steered beams, which leads to a significant gain enhancement of up to 10 dB over the complete beam-steering range. The conformal lens integrated WR3.4 antenna achieves a peak antenna gain of up to 30 dBi. An antenna prototype is manufactured using a mechanical assembly concept based on standard computerized numerical control (CNC) milling and a laser ablation process. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000171980
Veröffentlicht am 27.06.2024
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Hochfrequenztechnik und Elektronik (IHE)
Institut für Photonik und Quantenelektronik (IPQ)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2024
Sprache Englisch
Identifikator ISSN: 2637-6431
KITopen-ID: 1000171980
Erschienen in IEEE Open Journal of Antennas and Propagation
Verlag Institute of Electrical and Electronics Engineers (IEEE)
Band 5
Heft 5
Seiten 1306-1319
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 11.06.2024
Schlagwörter CNC milling, conformal lens, elliptical slot, frequency beam-steering, laser ablation, parabolic, plano-convex, rectangular waveguide, sub-THz antenna, WR3.4.
Nachgewiesen in Dimensions
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