Ambient Backscattering Transponder with Independently Switchable Rx and Tx Antennas

Research output: Contribution to journalArticleScientificpeer-review


Research units


This letter presents an ambient backscattering transponder with independently beam-switchable receive and transmit antennas. The independently switchable antennas make it possible to collect ambient waves from the direction where they are the strongest and further modulate and redirect the waves towards the receiver possible in another direction than the ambient source. The transponder consists of patch antennas, circulators, low-power RF switches and a diode based modulator.


Original languageEnglish
Number of pages4
JournalIEEE Sensors Letters
Publication statusE-pub ahead of print - 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Transponders, Antenna measurements, Radio frequency, Backscatter, Receiving antennas, Loss measurement, Modulation, Ambient backscatter, beam steering, internet-of-things (IoT), modulation, radio frequency identification (RFID), wireless sensor network (WSN)

ID: 32856214