Cov thev naus laus zis lim dej millimeter-wave (mmWave) yog ib qho tseem ceeb hauv kev ua kom muaj kev sib txuas lus wireless 5G, tab sis nws ntsib ntau yam teeb meem hauv qhov loj me, kev kam rau siab tsim khoom, thiab kev ruaj khov ntawm qhov kub thiab txias.
Hauv thaj chaw ntawm kev sib txuas lus wireless 5G, qhov kev tsom mus rau yav tom ntej yuav hloov mus rau kev siv cov zaus siab dua 20 GHz hauv mmWave spectrum los txhim kho lub peev xwm bandwidth, thaum kawg txhawb nqa cov nqi xa mus.
Nws paub zoo tias vim lawv cov zaus siab thiab kev poob txoj kev loj, cov teeb liab mmWave xav tau cov antennas me dua. Cov antennas no tau muab sib sau ua ke los ua cov antennas nqaim-beam, high-gain array.
Ib qho ntawm cov teeb meem tseem ceeb hauv kev tsim cov lim dej yog kev hloov kho kom haum rau qhov loj ntawm lub antenna, tshwj xeeb tshaj yog rau cov lim dej siab. Tsis tas li ntawd, qhov kev kam rau siab ntawm kev tsim khoom thiab qhov kub thiab txias ntawm cov lim dej cuam tshuam rau txhua yam ntawm kev tsim khoom thiab kev tsim khoom.
Kev Txwv Qhov Loj Hauv mmWave Technology
Hauv cov kab ke antenna ib txwm muaj, qhov sib nrug ntawm cov ntsiab lus yuav tsum tsawg dua ib nrab ntawm qhov ntev ntawm lub teeb (λ/2) kom tsis txhob muaj kev cuam tshuam. Lub hauv paus ntsiab lus no siv tau rau 5G beamforming antennas. Piv txwv li, lub antenna ua haujlwm hauv 28 GHz band muaj qhov sib nrug ntawm cov ntsiab lus kwv yees li 5 hli. Yog li ntawd, cov khoom hauv array yuav tsum me heev.
Cov phased arrays siv rau hauv mmWave daim ntawv thov feem ntau siv cov qauv tsim planar, raws li tau piav qhia hauv qab no, qhov twg antennas (cheeb tsam daj) tau teeb tsa rau ntawm cov laug cam luam tawm (PCBs) (cheeb tsam ntsuab), thiab cov laug cam (cheeb tsam xiav) tuaj yeem txuas nrog perpendicularly rau lub rooj tsavxwm antenna.
Qhov chaw ntawm cov laug cam no twb tsawg heev lawm, tab sis cov thev naus laus zis tshiab tab tom tshawb nrhiav cov qauv tiaj tiaj dua, uas txhais tau tias cov lim dej thiab lwm cov thaiv Circuit Court yuav tsum me dua kom tau teeb tsa ncaj qha rau sab nraub qaum ntawm lub PCB antenna.
Kev Cuam Tshuam ntawm Kev Tsim Khoom Siv rau ntawm Cov Lim Dej
Vim yog qhov tseem ceeb ntawm cov lim dej mmWave, kev kam rau siab ntawm kev tsim khoom ua lub luag haujlwm tseem ceeb, cuam tshuam rau kev ua haujlwm ntawm cov lim dej thiab tus nqi.
Yuav kom tshawb nrhiav ntxiv txog cov yam no, peb tau piv peb txoj kev tsim cov lim dej 26 GHz sib txawv:
Cov lus hauv qab no piav qhia txog cov kev kam rau siab tshaj plaws uas ntsib hauv kev tsim khoom:
Kev Cuam Tshuam Rau Kev Ua Siab Ntev Rau PCB Microstrip Filters
Raws li tau piav qhia hauv qab no, tus qauv lim dej microstrip tau qhia tawm.
Tus qauv tsim qauv yog raws li nram no:
Txhawm rau kawm txog qhov cuam tshuam ntawm kev kam rau ntawm lub lim dej PCB microstrip no, yim qhov kev kam rau siab tshaj plaws tau raug xaiv, qhia txog qhov sib txawv tseem ceeb.
Kev Cuam Tshuam Rau Kev Ua Siab Ntev Rau Cov Lim PCB Stripline
Tus qauv lim dej stripline, qhia hauv qab no, yog ib qho qauv xya-theem nrog 30 mil RO3003 dielectric boards nyob rau sab saum toj thiab hauv qab.
Qhov dov tawm tsis tshua ntxhab, thiab cov coefficient rectangular qis dua li ntawm microstrip vim tsis muaj xoom ze ntawm passband, ua rau muaj kev ua tau zoo tsis zoo ntawm cov zaus deb.
Ib yam li ntawd, kev tshuaj xyuas kev kam rau siab qhia tau tias muaj kev rhiab heev zoo dua piv rau cov kab microstrip.
Xaus lus
Rau kev sib txuas lus wireless 5G kom ua tiav qhov ceev dua, mmWave lim tshuab ua haujlwm ntawm 20 GHz lossis ntau dua zaus yog qhov tseem ceeb. Txawm li cas los xij, cov teeb meem tseem muaj nyob rau hauv cov nqe lus ntawm lub cev qhov ntev, kev ruaj khov ntawm kev kam rau siab, thiab kev nyuaj ntawm kev tsim khoom.
Yog li ntawd, qhov cuam tshuam ntawm kev kam rau siab rau cov qauv tsim yuav tsum tau xav txog kom zoo zoo. Nws yog qhov tseeb tias SMT cov lim dej ua kom muaj kev ruaj khov ntau dua li microstrip thiab stripline lim dej, qhia tias SMT surface-mount lim dej yuav tshwm sim ua qhov kev xaiv tseem ceeb rau kev sib txuas lus mmWave yav tom ntej.
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Lub sijhawm tshaj tawm: Lub Xya Hli-17-2024