title: Experimental demonstration of reflectarray antennas at terahertz frequencies.
abstract: Reflectarrays composed of resonant microstrip gold patches on a dielectric substrate are demonstrated for operation at terahertz frequencies. Based on the relation between the patch size and the reflection phase, a progressive phase distribution is implemented on the patch array to create a reflector able to deflect an incident beam towards a predefined angle off the specular direction. In order to confirm the validity of the design, a set of reflectarrays each with periodically distributed 360 × 360 patch elements are fabricated and measured. The experimental results obtained through terahertz time-domain spectroscopy (THz-TDS) show that up to nearly 80% of the incident amplitude is deflected into the desired direction at an operation frequency close to 1 THz. The radiation patterns of the reflectarray in TM and TE polarizations are also obtained at different frequencies. This work presents an attractive concept for developing components able to efficiently manipulate terahertz radiation for emerging terahertz communications.
authors.affiliation: School of Electrical & Electronic Engineering, The University of Adelaide, Adelaide, SA 5005, Australia. niutm@eleceng.adelaide.edu.au
authors.forename: Tiaoming
authors.initials: T
authors.lastname: Niu
authors.forename: Withawat
authors.initials: W
authors.lastname: Withayachumnankul
authors.forename: Benjamin S-Y
authors.initials: BS
authors.lastname: Ung
authors.forename: Hakan
authors.initials: H
authors.lastname: Menekse
authors.forename: Madhu
authors.initials: M
authors.lastname: Bhaskaran
authors.forename: Sharath
authors.initials: S
authors.lastname: Sriram
authors.forename: Christophe
authors.initials: C
authors.lastname: Fumeaux
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D012031:Refractometry / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D055053:Terahertz Radiation