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Showing papers by "Daniel J. Hoppe published in 2020"

Proceedings Article•DOI•
Minimizing effect of Sun-Earth-probe angle for RF / optical hybrid telescope

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Makan Mohageg, Mary Catherine Lorio, Daniel J. Hoppe, John N. Huleis, Alex Abramovici, Sang K. Chung 
13 Mar 2020

4 citations

Proceedings Article•DOI•
X- to Ka- Band Cryogenic LNA Module for Very Long Baseline Interferometry

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Andy Fung1, Lorene Samoska1, James Bowen1, Steven Montanez1, Jacob Kooi1, Melissa Soriano1, Christopher S. Jacobs1, Raju Manthena1, Daniel J. Hoppe1, Ahmed Akgiray2, Richard Lai3, Xiaobing Mei3, Michael E. Barsky3 •
California Institute of Technology1, Özyeğin University2, Northrop Grumman Corporation3
01 Aug 2020
TL;DR: In this paper, a low noise amplifier (LNA) with wide bandwidth of 5 to 35 GHz and low noise temperature performance of 10 -18 K, while operated at 10 K ambient.
Abstract: We report a new result of a packaged low noise amplifier (LNA) module with wide bandwidth of 5 to 35 GHz and low noise temperature performance of 10 -18 K, while operated at 10 K ambient. The LNA used 3-stages of sub-50 nm gate length, 100% indium channel content indium phosphide (InP) high electron mobility transistors (HEMTs). Wideband cryogenic LNAs are important for future radio astronomy observatories. To our knowledge these results represent the lowest noise achieved in a wideband amplifier from 5–35 GHz.

3 citations