Isixhumi se-SMA iyisixhumi esisetshenziswa kabanzi se-semi precision subminiature RF nesixhumi se-microwave, esilungele ikakhulukazi uxhumo lwe-RF kumasistimu kagesi anamaza afika ku-18 GHz noma ngaphezulu.Izixhumi ze-SMA zinezinhlobo eziningi, owesilisa, owesifazane, i-engeli eqondile, engakwesokudla, ukufakwa kwe-diaphragm, njll., okungahlangabezana nezidingo eziningi.Ubukhulu bayo obuncane kakhulu buvumela ukuthi isetshenziswe, ngisho nakumadivaysi kagesi amancane.
1, Isingeniso kusixhumi se-SMA
I-SMA ivamise ukusetshenziselwa ukuhlinzeka ngoxhumano lwe-RF phakathi kwamabhodi wesekethe.Izingxenye eziningi ze-microwave zifaka izihlungi, ama-attenuators, ama-mixers nama-oscillator.Isixhumi sinoxhumano lwangaphandle oluluchungechunge, olunomumo we-hexagon futhi lungaqiniswa ngesikrufu.Bangakwazi ukuqiniswa ekuqineni okulungile kusetshenziswa i-wrench ye-torque ekhethekile, ukuze ukuxhumana okuhle kufinyelelwe ngaphandle kokuqinisa.
Isixhumi sokuqala se-SMA sakhelwe ikhebula elingu-141 semi-rigid coaxial.Isixhumi sangempela se-SMA singabizwa ngokuthi isixhumi esincane kunazo zonke, ngoba isikhungo sekhebula le-coaxial sakha iphinikhodi ephakathi yokuxhuma, futhi asikho isidingo sokushintsha phakathi komqhubi wesikhungo se-coaxial kanye nephinikhodi ephakathi yesixhumi esikhethekile.
Inzuzo yayo yukuthi i-dielectric yekhebula ixhunywe ngokuqondile kusixhumi esibonakalayo ngaphandle kwegebe lomoya, futhi ukonakala kwayo ukuthi inani elilinganiselwe lemijikelezo yokuxhuma / yokunqamula ingenziwa.Kodwa-ke, ezinhlelweni ezisebenzisa izintambo ze-coaxial ezingaqinile, lokhu ngeke kube yinkinga, njengoba ukufakwa kuvame ukulungiswa ngemva kokuhlanganiswa kokuqala.
2. Ukusebenza kwesixhumi se-SMA
Isixhumi se-SMA sakhelwe ukuthi sibe nesivimbelo esingaguquki esingu-50 ohms kusixhumi.Izixhumi ze-SMA ekuqaleni zaklanywa futhi zakhelwa ukusebenza kufika ku-18 GHz, nakuba ezinye izinguqulo zinemvamisa ephezulu engu-12.4 GHz futhi ezinye izinguqulo zikhethwe njenge-24 noma 26.5 GHz.Imikhawulo ephezulu yefrikhwensi ingase idinge ukusebenza ngokulahlekelwa okukhulu kwembuyiselo.
Ngokuvamile, izixhumi ze-SMA zinokubonakala okuphezulu kunezinye izixhumi ezifika ku-24 GHz.Lokhu kungenxa yobunzima bokulungisa ngokunembile ukwesekwa kwe-dielectric, kodwa naphezu kwalobu bunzima, abanye abakhiqizi baye bakwazi ukunqoba kahle le nkinga futhi bakwazi ukuqoka izixhumi zabo zokusebenza kwe-26.5GHz.
Kuzintambo eziguquguqukayo, umkhawulo wefrikhwensi uvame ukunqunywa intambo kunesixhumi.Lokhu kungenxa yokuthi izixhumi ze-SMA zamukela izintambo ezincane kakhulu, futhi ukulahlekelwa kwazo ngokwemvelo kukhulu kakhulu kunalezo zezixhumi, ikakhulukazi ezikhathini ezingase zizisebenzise.
3. Amandla alinganiselwe esixhumi se-SMA
Kwezinye izimo, isilinganiso sesixhumi se-SMA singabaluleka.Ipharamitha eyisihluthulelo yokunquma isilinganiso somthamo wokubamba amandla wesixhumi seshafti yokukhwelana ukuthi ingadlulisa igagasi eliphezulu futhi igcine ukushisa kukhuphukele kuzinga lokushisa elimaphakathi.
Umphumela wokushisa ubangelwa ikakhulukazi ukumelana nokuxhumana, okuwumsebenzi wendawo yokuxhumana kanye nendlela amaphedi okuxhumana ahlangene ngayo.Indawo ebalulekile ukuxhumana okuphakathi nendawo, okumele kwakhiwe kahle futhi kuhlanganiswe kahle.Kufanele futhi kuqashelwe ukuthi isilinganiso samandla alinganiselwe ancipha ngokuvama ngoba ukulahlekelwa ukumelana kukhula ngokuvama.
Idatha yokucubungula amandla yezixhumi ze-SMA iyahluka kakhulu phakathi kwabakhiqizi, kodwa ezinye izibalo zibonisa ukuthi abanye bangacubungula ama-watts angu-500 ku-1GHz futhi behle baye ngaphansi kancane kwama-watts angu-200 ku-10GHz.Nokho, lena futhi idatha elinganisiwe, okungenzeka ukuthi empeleni iphakeme.
Okwesixhumi se-SMA microstrip sinezinhlobo ezine: uhlobo olukhiphekayo, uhlobo lwe-TTW yensimbi, uhlobo lwe-Medium TTW, uhlobo lokuxhuma ngokuqondile.Sicela uchofoze ku:https://www.dbdesignmw.com/microstrip-connector-selection-table/ukukhetha okuthengayo.
Isikhathi sokuthumela: Dec-30-2022