Title :
Feed horn coupled bolometer arrays for SPIRE - design, simulations, and measurements
Author :
Chattopadhyay, Goutam ; Glenn, Jason ; Bock, James J. ; Rownd, Brooks K. ; Caldwell, Martin ; Griffin, Matthew J.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
In this paper, we present the design, modeling, and measurements of feed horn coupled large bolometer arrays being developed for the Herschel Space Observatory\´s Spectral and Photometric Imaging REceiver (SPIRE) instrument. SPIRE has five arrays of feed horn coupled silicon-nitride micromesh "spider-web" bolometers in two instruments, a three-band photometer, and a two-band Fourier transform spectrometer, each covering the 430-GHz-1.5-THz band. The optical coupling efficiency, bandwidth, and crosstalk between adjacent pixels of the arrays were investigated with numerical electromagnetic-field simulators, and prototype arrays were measured extensively in a test facility. The measured results were found to be in good agreement with simulation predictions, and the simulation results were used as a benchmark for the design goals of the instrument.
Keywords :
Fourier transform spectrometers; antenna arrays; bolometers; crosstalk; focal planes; horn antennas; photometers; submillimetre astronomy; submillimetre wave antennas; submillimetre wave receivers; 430 GHz to 1.5 THz; Herschel Space Observatory; SPIRE; Si3N4; Si3N4 micromesh spider-web bolometers; Spectral and Photometric Imaging REceiver; bandwidth; crosstalk; cryogenic focal plane instruments; deep extragalactic imaging surveys; design; design goals; feed horn coupled bolometer arrays; galactic imaging surveys; integrating cavities; modeling; numerical electromagnetic-field simulators; optical coupling efficiency; simulation results; test facility; three-band photometer; two-band Fourier transform spectrometer; Bolometers; Electromagnetic measurements; Feeds; Instruments; Observatories; Optical arrays; Optical imaging; Optical receivers; Photometry; Predictive models;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2003.817428
