An antenna-coupled bolometer with an integrated microstrip bandpass filter

Myers, Michael J.; Holzapfel, W. L.; Lee, Adrian T.; O’Brient, R.; Richards, P. L.; Tran, Hung V.; Ade, Peter A. R.; Engargiola, G.; Smith, Andy; Spieler, H.

doi:10.1063/1.1879115

Cited by 46 publications

(29 citation statements)

References 10 publications

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“…A wideband microstrip superconducting frequency multiplexer is applied in front of TES bolometers in SAMBA(Superconducting Antenna-coupled Multifrequency Bolometric Array), where low loss and excellent out-of-band rejection is demonstrated at 3 frequencies of MM band (Goldin et al, 2003). Antenna-coupled TES bolometer with an integrated microstrip BP filter at 217 GHz is applied for a bolometer array in a ground based CMB polarization experiment (Myers et al, 2005).…”

Section: Rf Filtersmentioning

confidence: 99%

Spectral spatial fluctuations of CMBR: Strategy and concept of the experiment

2008

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Spectral Spatial Fluctuations (SSF) of the Cosmic Microwave Background Radiation (CMBR) temperature are considered as a result of an interaction of primordial atoms and molecules with CMBR in proto-objects moving with peculiar velocities relative to the CMBR. Expected optimistic values of ∆T /T are 2×10 −5 −2×10 −6 for SSF caused by HeH + at z =20-30 which are possible redshifts of early reionization scenario. The bandwidth of the lines is 0.1-2% depending on the scale of protoobjects and redshifts. For the SSF search CMBR maps in different spectral channels are to be observed and then processed by the Difference method. Simulation of the experiment is made for MSRT (Tuorla Observatory, Finland) equipped with a 7 × 4 beam cryo-microbolometer array with a chopping flat and frequency multiplexer providing up to 7 spectral channels in each beam (88-100 GHz). Expected ∆T/T limit in the experiment is 2×10 −5 with 6 ′ -7 ′ angular and 2% frequency resolution. Simulation shows that SSF may be recognized in the angular power spectrum when S/N in single frequency CMBR maps is as small as 1.17 or even something less for white noise. Such an experiment gives us a possibility to set upper limit of SSF in MM band and prepare future SSF observations.

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Section: Rf Filtersmentioning

confidence: 99%

Spectral spatial fluctuations of CMBR: Strategy and concept of the experiment

2008

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“…Alternative beam collimation methods include external hyperhemispherical lenses or platelet feeds. 1,11,12 The advantages of the photolithographic planar phase-antenna approach are fabrication simplicity, mechanical robustness at cryogenic temperatures, and immunity to misalignment. Compared with the highly curved lenses, the flat silicon entry surface also greatly simplifies the anti-reflection coating.…”

Section: In-phase Planar Slot Antennamentioning

confidence: 99%

Antenna-coupled TES bolometers for the SPIDER experiment

Kuo

Bock

Day

et al. 2006

Nuclear Instruments and Methods in Physics Research Section A:

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We have developed a completely lithographic antenna-coupled bolometer for CMB polarimetry. The necessary components of a millimeter wave radiometer -a beam forming element, a band defining filter, and the TES detectors -are fabricated on a silicon chip with photolithography. The densely populated antennas allow a very efficient use of the focal plane area. We have fabricated and characterized a series of prototype devices. We find that their properties, including the frequency and angular responses, are in good agreement with the theoretical expectations. The devices are undergoing optimization for upcoming CMB experiments.

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“…These issues may be addressed using on-chip designs for the filters. Although we chose to use lumped-element designs, on-chip bandpass filters may also be implemented using distributed circuit elements [5]. However, using distributed circuit elements causes the bandpass filters to leak at higher harmonic frequencies requiring a cascaded lowpass filter.…”

Section: Introductionmentioning

confidence: 99%

Millimeter-Wave Lumped Element Superconducting Bandpass Filters for Multi-Color Imaging

Kumar

Vayonakis

Leduc

et al. 2009

IEEE Trans. Appl. Supercond.

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Abstract-The opacity due to water vapor in the Earth's atmosphere obscures portions of the sub-THz spectrum (mm/sub-mm wavelengths) to ground based astronomical observation. For maximum sensitivity, instruments operating at these wavelengths must be designed to have spectral responses that match the available windows in the atmospheric transmission that occur in between the strong water absorption lines. Traditionally, the spectral response of mm/sub-mm instruments has been set using optical, metal-mesh bandpass filters [1]. An alternative method for defining the passbands, available when using superconducting detectors coupled with planar antennas, is to use on-chip, superconducting filters [2]. This paper presents the design and testing of superconducting, lumped element, on-chip bandpass filters (BPFs), placed inline with the microstrip connecting the antenna and the detector, covering the frequency range from 209-416 GHz. Four filters were designed with pass bands 209-274 GHz, 265-315 GHz, 335-361 GHz and 397-416 GHz corresponding to the atmospheric transmission windows. Fourier transform spectroscopy was used to verify that the spectral response of the BPFs is well predicted by the computer simulations. Two-color operation of the pixels was demonstrated by connecting two detectors to a single broadband antenna through two BPFs. Scalability of the design to multiple (four) colors is discussed.

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An antenna-coupled bolometer with an integrated microstrip bandpass filter

Cited by 46 publications

References 10 publications

Spectral spatial fluctuations of CMBR: Strategy and concept of the experiment

Spectral spatial fluctuations of CMBR: Strategy and concept of the experiment

Antenna-coupled TES bolometers for the SPIDER experiment

Millimeter-Wave Lumped Element Superconducting Bandpass Filters for Multi-Color Imaging

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