Abstract
Reconfigurable holographic surfaces (RHSs) for multi-beam steering applications have been receiving significant attention due to their low fabrication cost and power consumption. RHSs have the advantage of exploiting more antenna elements by configuring only their radiation levels, as opposed to the typical phased antenna arrays which enable the control of each element's phase and amplitude. RHSs can be utilized to realize holographic beamforming with single-feed or multi-feeds, where digital beamforming can also be implemented using multi-feeds. In this paper, first, the holographic beamforming problem is formulated by means of the conventional beamforming expressions using the array factor and the holographic beamforming weights. Then, a zero-forcing beamforming method is developed for a single-feed RHS to generate multi-beam and multi-null patterns. Additionally, a bisectional null scanning approach for beam sweeping is presented to exploit the advantages of RHS for forming wide nulls in the beamspace. Simulation results imply a substantial advantage of such single-feed RHS for high-accuracy beam sweeping.
Original language | English |
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Title of host publication | 2024 IEEE Wireless Communications and Networking Conference, WCNC 2024 - Proceedings |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Electronic) | 9798350303582 |
DOIs | |
Publication status | Published - 2024 |
Event | 25th IEEE Wireless Communications and Networking Conference, WCNC 2024 - Dubai, United Arab Emirates Duration: 21 Apr 2024 → 24 Apr 2024 |
Publication series
Name | IEEE Wireless Communications and Networking Conference, WCNC |
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ISSN (Print) | 1525-3511 |
Conference
Conference | 25th IEEE Wireless Communications and Networking Conference, WCNC 2024 |
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Country/Territory | United Arab Emirates |
City | Dubai |
Period | 21/04/24 → 24/04/24 |
Bibliographical note
Publisher Copyright:© 2024 IEEE.
Keywords
- beam sweeping
- holographic beamforming
- mmWave
- reconfigurable holographic surface
- zero-forcing beam-forming