Integrated active antennas with simultaneous transmit-receive operation

MJ Cryan, PS Hall

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

5 Citations (Scopus)


This paper discusses two novel active integrated antennas with same frequency transmit-receive operation. Firstly, results are presented for a two element active transmit-receive array using dual linear polarisation and sequential rotation. Each element includes an integrated oscillator and amplifier mounted on orthogonal edges of a square patch, such that transmit and receive paths are isolated and polarisation duplexed. The array gives in excess of 45dB transmit-receive isolation with an output power of 5.4dBm and a receive gain of 8.2dBi at 4.05GHz. Link budget calculations are used to show expected system performances. Secondly, an active circulator is integrated with a patch antenna to produce a same polarisation fully duplexed transceiver. The active circulator antenna is shown to have 14dBi transmit gain and 7.4dBi receive gain with a transmit-receive isolation of 26.9dB at 3.74GHz. These active antennas have potential uses in both short range communication and radar systems.
Translated title of the contributionIntegrated active antennas with simultaneous transmit-receive operation
Original languageEnglish
Title of host publication26th European Microwave Conference, Prague
Pages565 - 568
Number of pages4
Publication statusPublished - Oct 1996

Structured keywords

  • Photonics and Quantum


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