A PHOTOMIXER DRIVEN TERAHERTZ DIPOLE ANTENNA WITH HIGH INPUT RESISTANCE AND GAIN
- Resource Type
- Authors
- Salam K. Khamas; Wenfei Yin; Jayanta Sarma; Kenneth Kennedy; Richard A. Hogg
- Source
- Progress In Electromagnetics Research M. 44:13-20
- Subject
- Materials science
business.industry
Aperture
Terahertz radiation
Input impedance
Substrate (electronics)
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
law.invention
Gallium arsenide
chemistry.chemical_compound
Optics
chemistry
law
Optoelectronics
Dipole antenna
Antenna (radio)
business
Ground plane
- Language
- ISSN
- 1937-8726
A terahertz (THz) antenna is proposed that offers high input resistance and gain in the presence of an electrically thick GaAs substrate. The antenna is centrally fed using two vertical probes connected to a photomixer on a thin low temperature grown gallium arsenide (LTG-GaAs) film which is supported by the GaAs substrate. An input impedance of ∼ 3.3 kΩ has been achieved using a dipole antenna that is printed on a thin dielectric slab, and isolated from the supporting substrate using a metal ground plane. A square aperture has been introduced to facilitate the illumination of the photomixer with two laser beams. Furthermore, a frequency selective surface (FSS) has been incorporated in the configuration, which results in a broadside gain of ∼ 19 dBi at a resonance frequency of 0.97 THz.