5G Millimeter Wave Radio Technology - …

1 5G Millimeter Wave Radio TechnologyGabriel M. RebeizDistinguished Professor at the University of CaliforniaWireless Communications Industry Endowed ChairECE DepartmentUniversity of California, San DiegoTel: 858 336 5G North American Workshop2WE BUILD STUFF !!!3 Rebeiz Group: Phased Arrays and Transceivers 24 GHz CMOS Rx phased array35 GHz SiGe T-Rx phased array 80 GHz 16-element phased-array with built-in-self-test (R&D100 Award, Microwave Prize). 150 GHz CMOS T/Rx with 20 GbpsWafer-scale phased arrays with integrated antennas4US NAVY Radar/Communication Phased Arrays $250/element using all GaAs components. Reduced to $25/element using SiGe!!6 highNew Generation of Phased Arrays using CMOS/SiGe2001briefing inside BoeingIsotropic Phone Antenna and 10 dB Base Station AntennaPin: 10 WPin: 1 WPin: W : 30 GHz : 60 GHzPr = - 65 dBm for 1 Gbps (16 QAM)(250 MHz BW, 15 dB S/N, 7 dB NF)64x4 Array on Phone (15 dB) and 23 dB Base Station AntennaPin: 10 WPin: 1 WPin: W : 30 GHz : 60 GHz4x4 array(26obw)8x8 array(13obw)Now, we are talking!

2 ! But we need beam that PA needs to be 5-6 dB higher power due to Array on Phone (15 dB) and 33 dB Base Station AntennaPin: 10 WPin: 1 WPin: W : 30 GHz : 60 GHz4x4 array(26obw)16x32 array(6obw)We really need beam-steering!!Note that PA needs to be 5-6 dB higher power due to not be afraid (from mm-wave hardware)Just spend money (please)RF Beamforming or Digital (MIMO) Beamforming? One scanning beam (or 2) Single transceiver Low power Great for user terminals Multiple beams Full receiver on every antenna element Power hog at high data rates Good for base-stations1011 Broadcom 16Tx/16Rx 60 GHz Phased Array (40 nm CMOS)12 Broadcom 16Tx/16Rx 60 GHz Phased Array (40 nm CMOS)13 Broadcom: 10 Gbps Millimeter Wave SoC (Baseband/Modem) Targets Wireless Backhaul and Fronthaul Applications 10 Gbps (!!) Modulation up to 256 QAM Wide channels up to 2 GHz Integrated wideband Analog Front End (AFE) Supports Fast HW Design Advanced, wideband IQ impairment correction mechanismTensorCom 60 GHz link (7 Gbit/sec at 3m)14 Developed in a small company Single SOC (150 mW)15 Millimeter Wave (77 GHz) Automotive Radars (>1M/year)They know what they want and build it in millions of units/yearAntenna Directivity: 30 dB 77 GHz 16-Element Phased Array with BISTDC/ control pinsIF pinsBias, mm2 Measurements at 79-81 GHz (Scanning to +/-50o) Beam steering obtained for 100 field of view.

3 Average sidelobe level < -17 dB up to 0 12 21o32o40o48oHPBW : 79 GHz Automotive Radar with phased array beam scanning Scan picture of car with door closed and door OpenDoorNo DoorDoor Closed(Car is ~25 meters from radar)186x10 cm219 Wafer-Scale Phased Arrays High-efficiency antenna layer Scalable up to 12(in) First developed at UCSDS ilicon waferAntenna layer( Quartz)Phased arrayelementTrx/Baseband6x6 mm220Do be afraid (from rain!!!)It will reduce your data rate!!Rain attenuation dB/km216-12 dB/km for medium to heavy rain (70-80 GHz)2-4 dB/km for medium to heavy rain (28 GHz)55-60 dB antenna gainAlternative Solution: Beam Scanning with a Multi-Focal LensSingle beam with switch or multiple beams with a transceiver on every GHz Tunable Filters and channelizers500 700 MHz tunable notch filterRebeiz Group: Antennas and Tunable/Cognitive Wireless Communications DVC1 DVC2 DVC3 DVC401 GHz tunable antennas with 20 dB isolation between portsConclusion Millimeter wave hardware is expensive in NRE, but can do be done in large numbers and then low cost CMOS, SiGe, GaAs pHEMT, GaN, packaging, antennas, etc.

4 Are available. Not many people/groups know this stuff. This is not easy. Design techniques are getting better, but there is still (and will always be) some voodoo in RF Just figure out what you want first!!24