Wideband Multi-Mode Leaky-Wave Feed for Scanning Lens Phased Array at Submillimeter Wavelengths

Maria Alonso Del Pino, Sjoerd Bosma, Cecile Jung-Kubiak, Goutam Chattopadhyay, Nuria Llombart

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Abstract

In this paper, we propose a hybrid electro-mechanical scanning lens antenna array architecture suitable for the steering of highly directive beams at submillimeter wavelengths with field-of-views (FoV) of ±25°. The concept relies on combining electronic phase shifting of a sparse array with a mechanical translation of a lens array. The use of a sparse phased array significantly simplifies the RF front-end (number of active components, routing, thermal problems), while the translation of a lens array steers the element patterns to angles off-broadside, reducing the impact of grating lobes over a wide FoV. The mechanical translation required for the lens array is also significantly reduced compared to a single large lens, leading to faster and low-power mechanical implementation. In order to achieve wide bandwidth and large steering angles, a novel leaky wave lens feed concept is also implemented. A 550 GHz prototype was fabricated and measured demonstrating the scanning capabilities of the embedded element pattern and the radiation performance of the leaky wave fed antenna.

Original languageEnglish
Number of pages12
JournalIEEE Transactions on Terahertz Science and Technology
DOIs
Publication statusPublished - 2021

Keywords

  • beam-scanning
  • leaky-wave feed
  • lens antenna array
  • lens phased array
  • submillimeter-wave

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