The AT-884B/APX-44 Antenna is a Radar Interrogation antenna designed to receive vertically polarized signals at 1010–1030 MHz and radiate vertically polarized signals at 1010–1110 MHz. This antenna is constructed for capability of functioning during all normal maneuvers of the aircraft at all azimuth headings in respect to any radial to the interrogating radar location. The antenna is produced to the requirements of Military Specification MIL-T-55046. The antenna has an operating temperature range of -65° F to 130° F, an operating altitude of up to 30,000 ft, and is constructed to meet the environmental requirements of Military Specification MIL-E-5400. The antenna’s outside surfaces are protected with a chemical resistant CARC green coating.