A Single 30 cm Aperture Antenna Design for The Operation of 2 Widely Separated Frequency Bands for the Active Temperature, Ozone and Moisture Microwave Spectrometer (ATOMMS)

摘要

The Active Temperature Ozone and Moisture Microwave Spectrometer (A TOMMS) is an active aircraft to aircraft remote sensing occultation instrument that is designed to accurately measure the vertically resolved profiles of temperature, pressure, density, wafer and ozone content of the atmosphere. It uses a complimentary set of microwave transmitters and receivers in ?GHz and ?183 GHz water bands installed in each aircraft to measure the absorption of water and ozone as a function of altitude. Space constraints prevent the use of two separate antennas for each of these bands, so a single, dual frequency antenna system has been designed to simultaneously transmit and receive these two widely spaced frequency bands. This paper presents a detailed design of a HDPE anti-reflection grooved lens antenna that is illuminated by 2 separate, coaxially mounted feed horns for the two different frequency bands. We present the design, optimization and initial testing of the feed and lens system.