title: System integration and radiation pattern measurements of a phased array antenna employing an integrated photonic beamformer for radio astronomy applications.
abstract: In this paper we describe the system integration and the experimental demonstration of a photonically beamformed four-element receiving array antenna for radio astronomy applications. To our knowledge, the work described here is the first demonstration of the squint-free, continuously tunable beamsteering capability offered by an integrated photonic beamformer based on optical ring resonator true-time-delay units, with measured radiation patterns. The integrated beamformer is realized in a low loss, complementary metal-oxide-semiconductor (CMOS) compatible optical waveguide technology. The measurements show a wideband, continuous beamsteering operation over a steering angle of 23.5 degrees and an instantaneous bandwidth of 500 MHz limited only by the measurement setup.
authors.affiliation: Telecommunication Engineering Group, CTIT Research Institute, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands. m.burla@ewi.utwente.nl
authors.forename: Maurizio
authors.initials: M
authors.lastname: Burla
authors.forename: Chris G H
authors.initials: CG
authors.lastname: Roeloffzen
authors.forename: Leimeng
authors.initials: L
authors.lastname: Zhuang
authors.forename: David
authors.initials: D
authors.lastname: Marpaung
authors.forename: Muhammad Rezaul
authors.initials: MR
authors.lastname: Khan
authors.forename: Peter
authors.initials: P
authors.lastname: Maat
authors.forename: Klaas
authors.initials: K
authors.lastname: Dijkstra
authors.forename: Arne
authors.initials: A
authors.lastname: Leinse
authors.forename: Marcel
authors.initials: M
authors.lastname: Hoekman
authors.forename: René
authors.initials: R
authors.lastname: Heideman