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Antennas and Radio Frequency Self-Interference Cancellation

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Full-Duplex Communications for Future Wireless Networks

Abstract

This chapter presents and reviews radio frequency (RF) transceiver architectures for in-band full-duplex, spanning both antenna techniques and RF cancellation loops. In the antenna domain, isolation can be achieved using separate transmit and receive antennas, exploiting propagation loss for transmit-to-receive isolation, or through more complicated multi-antenna arrangements which exploit propagation domain cancellation. Single antenna duplexing architectures are also discussed, covering circulators and electrical balance duplexers. Passive and active feedforward cancellation techniques are reviewed, discussing the advantages and disadvantages of various cancellation architectures in terms of their complexity, and their performance in cancelling noise and multipath self-interference. The chapter concludes with a discussion on combining antenna and radio frequency cancellation techniques in full-duplex transceiver front-end architectures.

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Notes

  1. 1.

    This is distinct from the active cancellation techniques discussed below in Sect. 1.6, which tap the Tx signal in the digital baseband domain instead.

  2. 2.

    Also known as a “hybrid transformer,” “hybrid coil,” “bridge transformer,” “magic tee,” or simply a “hybrid.”

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Authors and Affiliations

  1. University of Bristol, Bristol, UK

    Leo Laughlin & Mark A. Beach

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  1. Leo Laughlin
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  2. Mark A. Beach
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Correspondence to Leo Laughlin .

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  1. Centre for Wireless Communications, University of Oulu, Oulu, Finland

    Hirley Alves

  2. Unit of Electrical Engineering, Tampere University, Tampere, Finland

    Taneli Riihonen

  3. Department of Electrical and Electronic Engineering, University of Peradeniya, Peradeniya, Sri Lanka

    Himal A. Suraweera

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Laughlin, L., Beach, M.A. (2020). Antennas and Radio Frequency Self-Interference Cancellation. In: Alves, H., Riihonen, T., Suraweera, H. (eds) Full-Duplex Communications for Future Wireless Networks. Springer, Singapore. https://doi.org/10.1007/978-981-15-2969-6_1

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