Sinuous antennas for cosmic microwave background polarimetry

Roger O'Brient; Jennifer Edwards; Kam Arnold; Greg Engargiola; William Holzapfel; Adrian T. Lee; Michael Myers; Erin Quealy; Gabriel Rebeiz; Paul Richards; Helmuth Spieler; Huan Tran

doi:10.1117/12.788526

19 July 2008 Sinuous antennas for cosmic microwave background polarimetry

Roger O'Brient, Jennifer Edwards, Kam Arnold, Greg Engargiola, William Holzapfel, Adrian T. Lee, Michael Myers, Erin Quealy, Gabriel Rebeiz, Paul Richards, Helmuth Spieler, Huan Tran

Author Affiliations +

Proceedings Volume 7020, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV; 70201H (2008) https://doi.org/10.1117/12.788526
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

We are developing antenna-coupled Transition Edge Sensor (TES) bolometers to be used in the focal planes of telescopes mapping Cosmic Microwave Background (CMB) polarization anisotropies. These detectors will be both dual-polarized and ultra-wide band, each containing several frequency channels. Arrays of such detectors could realize mapping speeds nearly an order of magnitude higher than previously deployed technology while naturally facilitating foreground removal. For such detectors to be useful, the antennas must have a high gain and a low cross-polarization. We have designed a novel modification of DuHamel's Sinuous antenna that couples to a contacting lens and is driven by integrated microstrip feed-lines. The integrated feed lines allow the antenna to interface with microstrip circuits and bolometers in a way that is planar and scalable to kilo-pixel arrays. We have demonstrated the polarization and beam properties with scale model antennas that operate at 1-12 GHz.

Citation Download Citation

Roger O'Brient, Jennifer Edwards, Kam Arnold, Greg Engargiola, William Holzapfel, Adrian T. Lee, Michael Myers, Erin Quealy, Gabriel Rebeiz, Paul Richards, Helmuth Spieler, and Huan Tran "Sinuous antennas for cosmic microwave background polarimetry", Proc. SPIE 7020, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV, 70201H (19 July 2008); https://doi.org/10.1117/12.788526

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