Is orbital angular momentum (OAM) based radio communication an unexploited area?

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We compare the technique of using the orbital angular momentum (OAM) of radio waves for generating multiple channels in a radio communication scenario with traditional multiple-in-multiple-out (MIMO) communication methods. We demonstrate that, for certain array configurations in free space, traditional MIMO theory leads to eigen-modes identical to the OAM states. From this we conclude that communicating over the sub-channels given by OAM states is a subset of the solutions offered by MIMO, and therefore does not offer any additional gains in capacity.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering


  • Antenna arrays, antenna radiation patterns, channel capacity, free-space propagation, MIMO, orbital angular momentum, radio communication.
Original languageEnglish
Pages (from-to)1126-1131
JournalIEEE Transactions on Antennas and Propagation
Issue number2
Publication statusPublished - 2012
Publication categoryResearch

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