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Published July 19, 2008 | Published
Book Section - Chapter Open

Antenna-coupled TES bolometer arrays for CMB polarimetry


We describe the design and performance of polarization selective antenna-coupled TES arrays that will be used in several upcoming Cosmic Microwave Background (CMB) experiments: SPIDER, BICEP-2/SPUD. The fully lithographic polarimeter arrays utilize planar phased-antennas for collimation (F/4 beam) and microstrip filters for band definition (25% bandwidth). These devices demonstrate high optical efficiency, excellent beam shapes, and well-defined spectral bands. The dual-polarization antennas provide well-matched beams and low cross polarization response, both important for high-fidelity polarization measurements. These devices have so far been developed for the 100 GHz and 150 GHz bands, two premier millimeter-wave atmospheric windows for CMB observations. In the near future, the flexible microstrip-coupled architecture can provide photon noise-limited detection for the entire frequency range of the CMBPOL mission. This paper is a summary of the progress we have made since the 2006 SPIE meeting in Orlando, FL.

Additional Information

© 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). The authors acknowledge support from the JPL Research and Technology Development program, a NASA/APRA grant "Antenna-Coupled TES Bolometer Array for CMB Polarimetry" to J. Bock, and the Gordon and Betty Moore foundation.

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