High-efficiency phased array using sequential over-the-air combining

Avraham Sayag, Emanuel Cohen

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


This paper presents a novel sequential transmitter phased array architecture for efficiency boosting of the transmitter-receiver link. The boost in efficiency is achieved by transmitting the signal peaks and the remaining data through different chains, each of which optimized for specific power, and recombining the signal over-the-air. Experimental results verified the over-the-air combining concept in actual environment. An 80 MHz bandwidth 802.11ac OFDM signal with 9.7dB PAPR at 5GHz was transmitted through an array of 4 patch antennas. The received EVM was lower than -38dB, similar to a uniform excited array. Simulations show that this transmitter can boost the efficiency by 31% and 54% for -8dB and -10dB power back-off from the array maximum power respectively, without any penalty in die area nor antenna size compared to a uniform array.

Original languageEnglish
Title of host publication2017 IEEE MTT-S International Microwave Symposium, IMS 2017
Number of pages4
ISBN (Electronic)9781509063604
StatePublished - 4 Oct 2017
Event2017 IEEE MTT-S International Microwave Symposium, IMS 2017 - Honololu, United States
Duration: 4 Jun 20179 Jun 2017

Publication series

NameIEEE MTT-S International Microwave Symposium Digest


Conference2017 IEEE MTT-S International Microwave Symposium, IMS 2017
Country/TerritoryUnited States


  • Beamforming
  • Millimeter wave
  • Over the air Doherty
  • Phased array transmitter
  • Sequential power amplifiers
  • TX efficiency

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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