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State of Military Investment in Phased Array Radars: A Comprehensive Review

Explore the current landscape of military investments in phased array radars and identify emerging technologies, gaps, and collaborative opportunities. Key focus on MPAR, technology gaps, and collaborative procurement strategies.

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State of Military Investment in Phased Array Radars: A Comprehensive Review

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  1. Session 2: Current State of Military Investment in PAR Panel Lead: Dr. Jeffrey Herd (MIT LL) Panelists: Dr. Richard Wittstruck, U.S. Army PEO IEW&S Dr. Michael Pollock, Office of Naval Research Mr. Mark Longbrake, Air Force Research Lab Panel Time Slot: 10:15 – 11:45 on Thursday, October 11, 2007 Panel Presentations: • Background and Session Objectives, J. Herd • Army’s Digital Array Radars, R. Wittstruck • R&D in Navy’s Phased Array Radar Program, M. Pollock • AF Research into PAR Antenna Design, M. Longbrake • Discussion

  2. Objectives of the Session • Provide a current snapshot of military investments in phased array radars • Identify emerging technologies and concepts from military investments that are relevant to MPAR • Identify technology gaps that must be addressed directly to meet MPAR needs • Identify collaborative opportunities to jointly increase procurement quantities and reduce cost

  3. National Air Surveillance Infrastructure ARSR-3 ASR-9 TDWR ASR-11 ASR-8 ASR-11 ARSR-1/2 ARSR-3 NEXRAD TDWR En Route Terminal Air Surveillance (ARSR-4) Range 250 nmi Beamwidth 1.4o x 2o Scan time 12 sec Weather (NEXRAD) Range 85 nmi Beamwidth 1o x 1o Scan time 240 sec Air Surveillance (ASR-9/11) Range 60 nmi Beamwidth 1.4o x 5o Scan time 5 sec Weather (TDWR) Range 100 nmi Beamwidth 1o x 0.5o Scan time 180 sec Today Timeline and Capabilities ? ASR-9 ARSR-4 1960 1970 1980 1990 2000 2010 2020 2030 • Aging mechanically scanned radars • 8 unique types for 4 different missions • Over 500 total with redundant spatial coverage

  4. ASR-8 ASR-11 ARSR-1/2 ARSR-3 NEXRAD TDWR National Air Surveillance Infrastructure Today MPAR ASR-9 ARSR-4 • Aging mechanically scanned radars • 8 unique types for 4 different missions • Over 500 total with redundant spatial coverage • State-of-the-art active phased array radars • 1 type for all missions: Multifunction Phased Array Radar (MPAR) • 334 MPARs replace 510 legacy radars

  5. Current Surveillance Radar Capabilities • Weather surveillance drives radar power and aperture size • Aircraft surveillance drives volume scan update rates

  6. Notional Full-Scale MPAR Parameters • Active Array (planar, 4 faces) Diameter: 8 m TR elements/face: 20,000 Dual polarization Beamwidth: 0.7 (broadside) Gain: > 46 dB • Transmit/Receive Modules Wavelength: 10 cm (2.7–2.9 GHz) Bandwidth/channel: 1 MHz Frequency channels: 3 Pulse length: 30 s Peak power/element: 2 W • Architecture Multiple independent beam clusters Aircraft Surveillance Non cooperative target tracking and characterization Weather Surveillance • Notional MPAR NAS system (167 full-scale, 167 terminal area) requires > 16 million active T/R elements

  7. Critical Challenges and Enablers Challenges: • Ultra-low cost array (~ $50k / m2 at S-band) • Scalable aperture sizes • Open architecture • Low operations and maintenance costs Enablers: • Highly integrated low power T/R chips • Scalable array sub-panels • Air cooled array • Design for manufacturability • High volume procurement

  8. Questions for Discussion • How will differences in mission requirements impact tech-transfer and collaboration? • Peak power • Bandwidth • Operating frequency • Production volume • Mil-spec vs commercial standards • U.S. vs overseas manufacturing • What collaborative opportunities exist to jointly increase procurement quantities and reduce cost? • How can we best determine an optimum solution for combined NWS, FAA, DHS, and DoD needs?

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