A three-dimensional feed-horn antenna for the 10-μm-wavelength infrared region has been suggested, characterized, and fabricated. It is applied to an infrared detector for efficient collection of infrared radiation and to reduce background noise. The optimum size of the horn antenna was designed for maximum antenna directivity. The three-dimensional feed-horn antenna mold was fabricated by rotating and tilting illumination, whereas the antenna plate was acquired through electroplating. Antenna characteristics were measured by coupling of the antenna with a microbolometer. Measurement results show that the directivity of the antenna is 16.1 dB and the background noise is reduced by a factor of ∼2 compared with an open-structure infrared detector.
© 2004 Optical Society of America
Original Manuscript: March 31, 2004
Revised Manuscript: July 14, 2004
Published: October 20, 2004
Kuntae Kim, Yong-Hee Han, Sung Moon, Jung-Ho Park, and Hyun-Joon Shin, "Fabrication and characterization of a three-dimensional feed-horn infrared antenna for an infrared detector," Appl. Opt. 43, 5594-5599 (2004)