Alignment aspects of OAM signal reception using Rotman lens based circular array

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)
82 Downloads (Pure)


This paper discusses orbital angular momentum (OAM) signal reception and alignment aspects using a Rotman lens based multimode circular patch antenna array. A 9-element planar circular array is connected to a 5 beam port Rotman lens which is capable of hosting 5 spatially orthogonal OAM modes namely l = 0, ± 1 and ±2. The Rotman lens based circular array is paced at the receiver end when it is illuminated with OAM signals. It is shown that the OAM modes reception is separable at the Rotman lens stage, hence reducing the requirement of the OAM phase correction at the receiver's signal processing block. It is also shown that a slight misalignment between transmitter and receiver circular arrays can substantially decrease the signal recovery chances for the transmitted data using the OAM modes l = ±1 and ±2. This feature can enhance physical layer security to the communication link using Rotman lens based multimode circular array.

Original languageEnglish
Title of host publication2020 IEEE 3rd 5G World Forum (5GWF): Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages3
ISBN (Electronic)9781728172996
Publication statusPublished - 13 Oct 2020
Event3rd IEEE 5G World Forum, 5GWF 2020 - Virtual, Bangalore, India
Duration: 10 Sept 202012 Sept 2020

Publication series

Name IEEE 5G World Forum, 5GWF- Conference Proceedings


Conference3rd IEEE 5G World Forum, 5GWF 2020
CityVirtual, Bangalore

Bibliographical note

Publisher Copyright:
© 2020 IEEE.


  • 5G
  • antenna
  • array
  • beamformer
  • lens
  • MIMO

ASJC Scopus subject areas

  • Hardware and Architecture
  • Information Systems and Management
  • Safety, Risk, Reliability and Quality
  • Computer Networks and Communications


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