W-band Lumped Element Kinetic Inductance Detector Array for Large Ground-Based Telescopes

被引：13

作者：

Coppolecchia, A. ^{[1
,2
]}

Paiella, A. ^{[1
,2
]}

Lamagna, L. ^{[1
,2
]}

Presta, G. ^{[1
,2
]}

Battistelli, E. S. ^{[1
,2
]}

de Bernardis, P. ^{[1
,2
]}

Castellano, M. G. ^{[3
]}

Columbro, F. ^{[1
,2
]}

Masi, S. ^{[1
,2
]}

Mele, L. ^{[1
,2
]}

Pettinari, G. ^{[3
]}

Piacentini, F. ^{[1
,2
]}

机构：

[1] Sapienza Univ Roma, Dipartimento Fis, Ple A Moro 2, I-00185 Rome, Italy

[2] Ist Nazl Fis Nucl, Sez Roma, Ple A Moro 2, I-00185 Rome, Italy

[3] CNR, Ist Foton & Nanotecol, Via Cineto Romano 42, I-00156 Rome, Italy

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2020年 / 199卷 / 1-2期

关键词：

LEKIDs; W-band; Simulations; Ground-based telescope; NOISE;

D O I：

10.1007/s10909-019-02275-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We describe the development of a W-band lumped element kinetic inductance detector array for application in large ground-based telescopes, like the Sardinia radio telescope. Based on the previous studies, we use a Ti/Al bi-layer film (10 nm thick Ti +\ 25 nm thick Al) for the resonators, to cover frequencies greater than 65 GHz. Optical simulations have been performed using ANSYS HFSS software suite, to optimize the absorber geometry, the illumination configuration, and the thickness of the dielectric substrate. Simulations suggest that the best geometry of the absorber is a front-illuminated third-order Hilbert curve, with a Si substrate 235 mu m thick, coupled to a single-mode circular waveguide. Electrical simulations have been performed using SONNET, to complete the design of the detectors by choosing the size of the capacitor, the bias coupling, and the feedline. In addition, the electrical simulations allow us to verify the lumped condition, to tune the feedline impedance and resonant frequencies, to constrain the coupling quality factor, and to minimize the electrical cross-talk between different pixels of the same array.

引用

页码：130 / 137

页数：8

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