Henthorn, S. orcid.org/0000-0003-1913-9283, Ford, K. orcid.org/0000-0002-1080-6193 and O'Farrell, T. orcid.org/0000-0002-7870-4097 (2020) Direct antenna modulation for high-order phase shift keying. IEEE Transactions on Antennas and Propagation, 68 (1). pp. 111-120. ISSN 0018-926X
Abstract
An antenna capable of directly phase modulating a radio frequency carrier is discussed, designed, and measured as both an antenna and a modulator. Access point densification for the Internet of Things will be expensive in part due to the cost and inefficiency of amplifying waveforms with large peak-to-average power ratios for downlink transmission. Directly modulating at the antenna means only a carrier wave has to be amplified, reducing the cost of densification. Here, reconfigurable frequency selective surfaces are suggested as phase modulators. The design process for producing a phase modulating antenna is detailed, and a prototype is fabricated that is capable of up to 8-PSK modulation with 5.3dB variation in constellation points and a peak gain of 2.3dB. When implemented in an end-to-end communications system, the antenna exhibits only 1.5dB drop in performance compared with instrument grade modulation in an AWGN channel.
Metadata
Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/. | ||||
Keywords: | Cellular Radio; Continuous Phase Modulation; Phase Shift Keying; Frequency Selective Surfaces; Reconfigurable Antennas | ||||
Dates: |
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Institution: | The University of Sheffield | ||||
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) | ||||
Funding Information: |
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Depositing User: | Symplectic Sheffield | ||||
Date Deposited: | 27 Aug 2019 14:53 | ||||
Last Modified: | 10 Dec 2021 11:11 | ||||
Status: | Published | ||||
Publisher: | Institute of Electrical and Electronics Engineers (IEEE) | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1109/TAP.2019.2935136 |