Wideband Multimode Leaky-Wave Feed for Scanning Lens-Phased Array at Submillimeter Wavelengths
| Autor: | Nuria Llombart, Maria Alonso-delPino, Goutam Chattopadhyay, Cecile Jung-Kubiak, Sjoerd Bosma |
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| Rok vydání: | 2021 |
| Předmět: |
Phased array
Terahertz radiation ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION lens antenna array Physics::Optics 02 engineering and technology Grating 7. Clean energy law.invention beam-scanning leaky-wave feed submillimeter-wave Optics Sparse array law 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Wideband Physics Radiation Multi-mode optical fiber business.industry 020208 electrical & electronic engineering 020206 networking & telecommunications Lens (optics) lens phased array Antenna (radio) business |
| Zdroj: | IEEE Transactions on Terahertz Science and Technology IEEE Transactions on Terahertz Science and Technology, 11(2) |
| ISSN: | 2156-342X |
| DOI: | 10.1109/tthz.2020.3038033 |
| Popis: | In this article, we propose a hybrid electromechanical 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. |
| Databáze: | OpenAIRE |
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