标签: radio-frequency

   Radio-FrequencySemiconductors……

   Radio-FrequencyDevices……

[免费]美国海军电子培训系列之《无线通信原理》,radio-frequencycommunicationsprinciples(navyelectronicstechniciancoursevol171998)……

射频通信原理（米国海军资料）,Radio-frequencycommunicationsprinciples[Navy]……

Long-RangeUltra-WidebandRadio-FrequencyIdentificationLong-RangeUltra-WidebandRadio-FrequencyIdentificationFormoreinformationcontactFaridU.Dowla(925)423-7579,dowla1@llnl.govRadioFrequencyIdentification(RFID)isanautomaticidentificationtechnology,similartobarcode,butwiththedistinctadvantagethatitdoesnotrequireline-ofsightoperation―itusesradiowavestocommunicatewiththetargettags.ThekeychallengesinRFIDtechnologyaretoassureconnectivitytothetags,todetermineaccurateposition,andtoreliablycommunicatesensorstatusifneeded,whilereducingthecostsoftheinfrastructureandtags.Sinceultra-wideband(UWB)signalshavebeendemonstratedtohelpingoodconnectivityandpositionfixing,inthisprojectweexplorethepossibilityofextendingtheuseofUWBtechniquestoRFID.Ener……