Plenary Round Table Interoperable Space and Enabling Technologies and Capabilities The State of Key Technologies that Ease Interoperability Between Government and Commercial Networks Rainee N. Simons, Ph.D. Program Officer, Planetary Science Division Science Mission Directorate, NASA HQ, Washington, DC 20024 (On Detail from NASA Glenn Research Center) Mobile: (216) 789-0237; Email: Rainee.N.Simons@nasa.gov 25th Ka and Broadband Communications Conference Sorrento, Italy, September 30, 2019

Outline Gaps Being Addressed Power Amplifiers LNAs Wideband Front-Ends CP Power Amplifiers LNAs SDR Waveforms Wideband Front-Ends Gaps Being Addressed

Power and Frequency Flexible Ka-band Traveling-Wave Tube Amplifiers Up to 250-W for Space Communications L3 Model 999HA TWT - WR-28 waveguide ports in a conduction cooled package Saturated performance over 5-GHz bandwidth Saturated performance over 9-GHz bandwidth Saturated performance over 31.8 to 32.3 GHz Wide Bandwidth Enables: (a) Cognitive Communications & Interoperability Between Networks, & (b) LEO User Spacecraft to communicate with TDRSS (25.25-27.5 GHz) and with GEO Commercial Communications Satellites (27.5-31.0 GHz)

Power and Frequency Flexible Traveling-Wave Tube Amplifiers with WR-34 & WR-22 Waveguide Ports for Space Communications L3 EDD Model 999HA K-Band TWTA with WR-34 Waveguide Ports 18.0 to 26.5 GHz L3 EDD Model 2000HDA-A16 Q-Band TWTA with WR-22 Waveguide Ports 33.0 to 50.0 GHz RF Power Amplification Flexible Across the 18.0 to 40 GHz Range Enables LEO User Spacecraft to be Interoperable and Downlink Data Either to NASA NEN Stations (25.5-26.5 GHz) or to Commercial Ground Stations (18-21.2 GHz) Q-band Enables Downlinking Data to Commercial Ground Stations

Ultra-Broadband Low Noise Amplifiers for Flexible Wideband Receiver Front End Circuit* is fabricated using 0.15 micron GaAs E-mode pseudomorphic high-electron-mobility transistor (pHEMT) process Frequency range: 1 to 40 GHz (DC to Ka-Band) Average gain: 26.5 dB Input/output return loss: better than 9 dB Noise figure: 2.8 to 3.9 dB Peak OP1 dB: 4.9 to 12.7 dB Supply voltage: 4.5 V Chip area: 1.06 mm2 *J. Hu and K. Ma, “A 1-40 GHz LNA MMIC Using Multiple Bandwidth Extension Techniques,” IEEE Microwave & Wireless Components Lett., vol. 29, no. 5, pp. 336-338, May 2019.

Front End Design/Development & SDR Waveforms for Interoperability NASA & Harris Wideband Front-End Development Cooperative Agreement Historically, NASA & Harris developed the 1st SDR – flew 7 years on ISS & supported the SCaN Testbed Harris now offers a new product line of SDRs for satcom Wideband Front-End Design Goals: Cover frequencies from 18.3-34.7 GHz Bandwidth > 500 MHz Interoperability between Government and commercial satellite networks with the selection of appropriate waveform and modulation Capability to port a wide variety of waveforms Compatibility of Up & Down Converter with AppSTAR Micro SDR in 3U form factor Leverages components developed through IR&D Plan to deliver a prototype by early CY2020 Harris SDR transceiver to fly on STPSat-6 & support the NASA LCRD experiment