Millimeter yoj signals muab qhov dav bandwidth thiab cov ntaub ntawv ntau dua li cov cim tsis tshua muaj. Ua tib zoo saib tag nrho cov teeb liab saw ntawm lub kav hlau txais xov thiab digital baseband.
Tshiab 5G xov tooj cua (5G NR) ntxiv millimeter yoj zaus rau cov khoom siv ntawm tes thiab tes hauj lwm. Nrog rau qhov no los ntawm RF-rau-baseband teeb liab sawb thiab cov khoom uas tsis tas yuav tsum muaj rau zaus qis dua 6 GHz. Thaum millimeter nthwv dej frequencies technically ncua qhov ntau ntawm 30 mus rau 300 GHz, rau 5G lub hom phiaj lawv ncua ntawm 24 mus rau 90 GHz, tab sis feem ntau ncov ntawm ib ncig ntawm 53 GHz. Millimeter yoj daim ntawv thov tau pib xav tias yuav muab cov ntaub ntawv nrawm dua ntawm cov xov tooj smartphones hauv cov nroog, tab sis txij li tau hloov mus rau qhov kev siv ceev ceev xws li chaw ntau pob. Nws kuj yog siv rau kev ruaj ntseg wireless nkag (FWA) cov kev pabcuam hauv internet thiab cov tes hauj lwm ntiag tug.
Cov txiaj ntsig tseem ceeb ntawm 5G mmWave Lub siab dhau ntawm 5G mmWave tso cai rau kev hloov pauv cov ntaub ntawv loj (10 Gbps) nrog rau 2 GHz channel bandwidth (tsis muaj kev sib sau ua ke). Qhov no feature yog qhov zoo tshaj plaws haum rau tes hauj lwm nrog cov ntaub ntawv loj hloov kev xav tau. 5G NR kuj tseem ua rau qis qis dua vim muaj cov ntaub ntawv hloov pauv ntau dua ntawm 5G xov tooj cua nkag mus rau lub network thiab cov tub ntxhais hauv lub network. LTE tes hauj lwm muaj latency ntawm 100 milliseconds, thaum 5G tes hauj lwm muaj latency ntawm 1 millisecond.
Dab tsi yog hauv mmWave signal chain? Lub xov tooj cua zaus interface (RFFE) feem ntau txhais tau tias yog txhua yam ntawm lub kav hlau txais xov thiab lub hauv paus digital system. RFFE feem ntau hu ua analog-to-digital feem ntawm ib lub receiver lossis transmitter. Daim duab 1 qhia tau hais tias ib qho architecture hu ua kev hloov pauv ncaj qha (zero IF), uas cov ntaub ntawv hloov pauv ua haujlwm ncaj qha rau ntawm RF teeb liab.
Daim duab 1. Qhov no 5G mmWave input teeb liab saw architecture siv ncaj qha RF sampling; Tsis xav tau inverter (Duab: Cov lus piav qhia luv luv).
Lub millimeter yoj lub teeb liab saw muaj xws li RF ADC, RF DAC, lub lim dej qis, lub zog amplifier (PA), digital down and up converters, RF filter, low sound amplifier (LNA), and a digital moos generator ( CLK). Lub voj voog kaw lub voj voog / voltage tswj oscillator (PLL / VCO) muab lub zos oscillator (LO) rau lub nce thiab nqis converters. Hloov (pom hauv daim duab 2) txuas lub kav hlau txais xov mus rau lub teeb liab tau txais los yog kis tau tus kab mob. Tsis pom yog beamforming IC (BFIC), tseem hu ua phased array siv lead ua lossis beamformer. BFIC tau txais lub teeb liab los ntawm lub converter thiab faib nws mus rau hauv ntau txoj kev. Nws kuj tseem muaj theem ywj pheej thiab nce kev tswj ntawm txhua qhov channel rau kev tswj kab teeb.
Thaum ua haujlwm hauv hom tau txais, txhua lub channel tseem yuav muaj theem ywj pheej thiab nce kev tswj hwm. Thaum lub downconverter qhib, nws tau txais lub teeb liab thiab xa nws los ntawm ADC. Nyob rau hauv pem hauv ntej vaj huam sib luag muaj ib tug built-in hwj chim amplifier, LNA thiab thaum kawg hloov. RFFE ua rau PA lossis LNA nyob ntawm seb nws puas nyob hauv hom kis lossis tau txais hom.
Transceiver Daim duab 2 qhia ib qho piv txwv ntawm RF transceiver siv IF chav kawm ntawm baseband thiab 24.25-29.5 GHz millimeter yoj band. Qhov no architecture siv 3.5 GHz raws li qhov ruaj IF.
Kev xa tawm ntawm 5G wireless infrastructure yuav muaj txiaj ntsig zoo rau cov neeg muab kev pabcuam thiab cov neeg siv khoom. Cov kev lag luam tseem ceeb tau txais kev pab yog cellular broadband modules thiab 5G kev sib txuas lus modules los pab kom muaj Internet ntawm Yam (IIOT). Kab lus no tsom mus rau qhov millimeter nthwv dej ntawm 5G. Hauv cov ntawv yav tom ntej, peb yuav txuas ntxiv los tham txog cov ncauj lus no thiab tsom mus rau cov ntsiab lus nthuav dav ntawm ntau lub ntsiab lus ntawm 5G mmWave teeb liab saw.
Suzhou Cowin muab ntau hom RF 5G 4G LTE 3G 2G GSM GPRS xov tooj ntawm tes kav hlau txais xov, thiab txhawb kev debug zoo tshaj plaws kav hlau txais xov hauv koj lub cuab yeej nrog muab cov kav hlau txais xov ua tiav daim ntawv qhia, xws li VSWR, nce, efficiency thiab 3D hluav taws xob qauv.
Post lub sij hawm: Sep-12-2024