Design of RF Self-interference Cancellation Circuit for 100-W Full-Duplex Radio at 225-400 MHz

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

5 Citations (Scopus)
177 Downloads (Pure)

Abstract

The full-duplex (FD) technology enables future military radios to simultaneously transmit and receive (STAR) on the same and adjacent frequencies. This enhances spectral efficiency and makes simultaneous integrated tactical communications and electronic warfare operations possible as opposed to the current time- or frequency-division radios used in military applications. The main challenge in implementing full-duplex radios is the strong self-interference (SI) between the transmitter and the receiver requiring solutions how to cancel the coupling, which has been largely resolved at higher ultra high frequency (UHF) bands for low power transmission. This paper presents a radio-frequency SI cancellation circuit suitable especially for very high-power military applications at military-relevant lower UHF band (225-400 MHz). The circuit couples power from the transmitter and tunes the phase and amplitude of the signal to destructively combine with the received SI, and thus isolates the receiver and transmitter. The paper introduces a concept consisting of a 90° vector modulator and switchable delay lines for a low-loss and high-power-handling cancellation circuit that enables operation with very-high transmit powers of even up to 1 kW.

Original languageEnglish
Title of host publication2021 International Conference on Military Communication and Information Systems, ICMCIS 2021
PublisherIEEE
Number of pages6
ISBN (Electronic)9781665445863
DOIs
Publication statusPublished - 4 May 2021
Publication typeA4 Article in conference proceedings
EventInternational Conference on Military Communication and Information Systems - , Netherlands
Duration: 4 May 20215 May 2021

Publication series

Name2021 International Conference on Military Communication and Information Systems, ICMCIS 2021

Conference

ConferenceInternational Conference on Military Communication and Information Systems
Country/TerritoryNetherlands
Period4/05/215/05/21

Publication forum classification

  • Publication forum level 1

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Networks and Communications
  • Computer Science Applications
  • Hardware and Architecture
  • Information Systems
  • Information Systems and Management

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