Millimeter-wave (mmWave) lim thev naus laus zis yog ib qho tseem ceeb hauv kev ua kom muaj kev sib txuas lus hauv 5G wireless, tab sis nws ntsib ntau yam teeb meem ntawm lub cev qhov ntev, kev tsim kev kam rau siab, thiab qhov kub thiab txias.
Nyob rau hauv lub realm ntawm mainstream 5G wireless kev sib txuas lus, lub hom phiaj yav tom ntej yuav hloov mus rau kev siv zaus tshaj 20 GHz nyob rau hauv lub mmWave spectrum los txhim kho bandwidth muaj peev xwm, thaum kawg boosting kis tau tus nqi.
Nws yog qhov paub zoo tias vim lawv qhov siab zaus thiab txoj kev tsis tseem ceeb, mmWave cov cim qhia yuav tsum muaj cov kav hlau txais xov me me. Cov kav hlau txais xov no tau ua ke ua ke los tsim cov kab nqaim, siab-tau txais array antennas.
Ib qho ntawm cov teeb meem tseem ceeb hauv kev tsim lim dej yog nyob rau hauv kev hloov mus rau lub kav hlau txais xov qhov ntev, tshwj xeeb tshaj yog rau cov lim dej ntau zaus. Tsis tas li ntawd, kev tsim kev kam rau siab thiab qhov kub thiab txias ntawm cov ntxaij lim dej cuam tshuam rau txhua yam ntawm cov khoom tsim thiab kev tsim khoom.
Kev txwv loj hauv mmWave Technology
Hauv cov kav hlau txais xov array ib txwm muaj, qhov sib nrug ntawm cov ntsiab lus yuav tsum tsawg dua ib nrab ntawm lub wavelength (λ/2) kom tsis txhob cuam tshuam. Lub hauv paus ntsiab lus no sib npaug siv rau 5G beamforming antennas. Piv txwv li, tus kav hlau txais xov ua haujlwm hauv 28 GHz band muaj qhov sib nrug ntawm kwv yees li 5 hli.Yog li ntawd, cov khoom hauv cov array yuav tsum me me heev.
Phaseed arrays ua haujlwm hauv mmWave daim ntawv thov feem ntau tau txais cov qauv tsim qauv, raws li tau piav qhia hauv qab no, qhov twg cov kav hlau txais xov (qhov chaw daj) tau teeb tsa rau ntawm cov ntawv luam tawm Circuit Board (PCBs) (cov cheeb tsam ntsuab), thiab Circuit Court boards (xiav cheeb tsam) tuaj yeem txuas nrog perpendicularly rau lub kav hlau txais xov board.
Qhov chaw ntawm cov rooj sib tham hauv Circuit Court no tsawg kawg nkaus, tab sis cov thev naus laus zis tshiab tab tom tshawb nrhiav ntau cov qauv vaj huam sib luag, txhais tau tias cov ntxaij lim dej thiab lwm cov thaiv hluav taws xob yuav tsum tau me me kom txuas ncaj qha rau sab nraum qab ntawm lub kav hlau txais xov PCB.
Kev cuam tshuam ntawm Kev Lag Luam Tolerances ntawm Lim
Muab qhov tseem ceeb ntawm mmWave cov ntxaij lim dej, kev tsim kev kam rau ua ua lub luag haujlwm tseem ceeb, cuam tshuam rau kev ua haujlwm lim dej thiab tus nqi.
Txhawm rau tshawb xyuas cov xwm txheej no, peb piv peb qhov sib txawv 26 GHz lim kev tsim khoom:
Cov lus hauv qab no qhia txog kev ua siab ntev heev uas tau ntsib hauv kev tsim khoom:
Tolerance Impact rau PCB Microstrip Lim
Raws li tau piav qhia hauv qab no, lub microstrip lim tsim tau nthuav tawm.
Tus tsim simulation nkhaus yog raws li nram no:
Txhawm rau kawm txog kev kam rau siab rau ntawm PCB microstrip lim no, yim qhov muaj peev xwm ua siab ntev tau raug xaiv, qhia qhov sib txawv tseem ceeb.
Tolerance Impact ntawm PCB Stripline Lim
Lub stripline lim tsim, qhia hauv qab no, yog xya-theem qauv nrog 30 mil RO3003 dielectric boards nyob rau sab saum toj thiab hauv qab.
Lub dov-tawm yog qis qis, thiab cov duab plaub coefficient yog qis dua ntawm microstrip vim tsis muaj xoom zeros nyob ze ntawm lub passband, uas ua rau muaj kev sib haum xeeb zoo ntawm cov zaus nyob deb.
Ib yam li ntawd, kev ntsuas kev kam rau siab qhia tau tias muaj kev nkag siab zoo dua piv rau cov kab microstrip.
Xaus
Rau 5G wireless kev sib txuas lus kom ua tiav qhov nrawm dua, mmWave lim tshuab ua haujlwm ntawm 20 GHz lossis siab dua zaus yog qhov tseem ceeb. Txawm li cas los xij, cov teeb meem tshwm sim nyob rau hauv cov nqe lus ntawm lub cev qhov ntev, kam rau siab stability, thiab kev tsim complexity.
Yog li, qhov cuam tshuam ntawm kev kam rau siab rau cov qauv tsim yuav tsum tau ua tib zoo xav txog. Nws yog qhov tseeb tias SMT cov ntxaij lim dej muaj kev ruaj ntseg ntau dua li microstrip thiab stripline lim, tawm tswv yim tias SMT nto-mount lim yuav tshwm sim los ua qhov kev xaiv tseem ceeb rau kev sib txuas lus mmWave yav tom ntej.
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Post lub sij hawm: Lub Xya hli ntuj-17-2024