Distribution Statement A – Approved for Public Release, Distribution Unlimited www.darpa.mil Millimeter Wave Digital Arrays (MIDAS) Background Overview Multi-Beam Digital Arrays at Millimeter Wave Dominate the millimeter wave spectrum with wideband digital beamforming • Many simultaneous beams in all directions for simplified network discovery • Wide bandwidth & frequency agility • Line-of-sight tactical communications, traditional & emerging LEO SATCOM • Scalable Solution for Multiple Applications 2 Core Tech Areas • Digital RF silicon tile at 18-50 GHz • Wideband antenna & T/R components Technical Approach Raytheon Technical Areas 1 + 2 Direct conversion beamforming in RF SOI CMOS (45/22 nm) with InP wideband PAs and LNAs 3D Printed Radiators 3mm pitch Multi-Reticle Silicon Array Feedboard GaAs + SiGe + CMOS 3D Heterogeneous Tiles Jariet Technologies Technical Area 1 32 channel 12LP CMOS beamforming IC tile TA3 mm wave Array Fundamentals On-grid 3D hetero-integrated array with 90nm GaAs PAs and 3D printed wideband radiators Northrop Grumman Technical Area 2 Summary • 18-50 GHz element-level digital beamforming • Low-power, high dynamic range mmW transceivers • 3D packaging of CMOS, III-V & antennas • Scalable tile for large arrays Notional MIDAS link: 50 x 50 mm 2 array, 12.5 Watt transmit power, 62-70 dBm EIRP over the band 10 dB link SNR RH = 50%, No Fog TA1/2 Performers: Craig Hornbuckle 1 , Ryan Walsh 2 , James McSpadden 3 1 Jariet Technologies, 2 Northrop Grumman, 3 Raytheon Performer Frequency Plan CMOS ADC/DAC Rate LO/CLK PA LNA Switch Antenna Jariet/NGMS High IF 12LP Fin FET 8/8 GSps Local PLLs Qorvo 90 nm GaAs pHEMT (QPHT09) Qorvo 90 nm GaAs pHEMT (QPHT09) Qorvo 90 nm GaAs pHEMT (QPHT09) 3D Printed Notch Raytheon SAS Direct Conversion 45nm / 22FDX 2x 4/8 GSps Distributed LO Teledyne 250nm InP HBT Teledyne 50nm InP HEMT Teledyne 50nm InP HEMT Wideband Current loop AN/FPS-85 – en.wikipedia.org/wiki/Eglin_AFB_Site_C-6 Cobra Dane – en.wikipedia.org/wiki/Cobra_Dane PAVE PAWS – en.wikipedia.org/wiki/PAVE_PAWS AN/SPY-1 – missilethreat.csis.org/defsys/an-spy-1-radar/ AN/MPQ-65 – en.wikipedia.org/wiki/MIM-104_Patriot F-35 – www.mwrf.com/systems/radar-systems-make-history AEHF – https://en.wikipedia.org/wiki/Advanced_Extremely_High_Frequency MFRF – darpa.mil/program/multifunction-rf ACT – darpa.mil/program/arrays-at-commercial-timescales AEHF – www.afspc.af.mil/About-Us/Fact-Sheets/Display/Article/249024/ advanced-extremely-high-frequency-system/ B-1B – www.northropgrumman.com/Capabilities/ ANAPQ164Radar/Pages/default.aspx HAPDAR – commons.wikimedia.org/wiki/ File:HAPDAR_array_installation.jpg F-22 – fullafterburner.weebly.com/next-gen-weapons/anapg-77-radar-modes Space Fence – www.globalsecurity.org/space/systems/space-fence.htm JSTARS – en.wikipedia.org/wiki/Northrop_Grumman_E-8_Joint_STARS SMART – https://ieeexplore.ieee.org/document/4250440 3D Heterogeneous Integration