Number 62 (Story #4), January 10, 1992 by Phillip F. Schewe and Ben Stein INFRARED ANTENNAS are the result of adapting existing microwave technology to shorter wavelengths. Donald G. McDonald and his co-workers at NIST in Boulder have developed a device which consists of a tiny spiral-shaped film of gold deposited on a niobium surface; this microantenna is sensitive to radiation in the 3-30 micron wavelength range (Applied Physics Letters, 16 Dec. 1991). The use of antennas, rather than more conventional infrared detectors, means that the size of the detector can be much smaller than the wavelength of the incident infrared radiation. This in turn would facilitate infrared imaging with better resolution. (Science News, 4 Jan. 1992.)