Title :
Full-wavelength dipole antenna on a membrane covered with a lens for a high gain terahertz photomixer
Author :
Nguyen, Truong Khang ; Ho, Thi Anh ; Han, Haewook ; Park, Ikmo
Author_Institution :
Sch. of Electr. & Comput. Eng., Ajou Univ., Suwon, South Korea
Abstract :
This paper presents a full-wavelength dipole antenna on a membrane covered with a lens to improve the efficiency and directivity of a terahertz photomixer. A full-wavelength dipole antenna supported by a membrane structure has low directivity. An extended hemispherical lens introduced in front of the antenna can achieve high directivity. The optimized antenna had a 3818-Ω input resistance and a 71.2% radiation efficiency at the 1.07-THz resonance frequency. The total efficiency of this structure is approximately 6.8 times that of a full-wavelength dipole antenna with almost the same directivity.
Keywords :
antenna radiation patterns; dipole antennas; lenses; millimetre wave mixers; extended hemispherical lens; full-wavelength dipole antenna; high gain terahertz photomixer; input resistance; membrane structure; optimized antenna; radiation efficiency; Antenna radiation patterns; Dipole antennas; Gallium arsenide; Lenses; Resistance; Substrates; Terahertz antenna; hemispherical lens; high input resistance; membrane structure; photomixer;
Conference_Titel :
Millimeter Waves (GSMM), 2012 5th Global Symposium on
Conference_Location :
Harbin
Print_ISBN :
978-1-4673-1302-5
DOI :
10.1109/GSMM.2012.6314401
