Isikhulisi somsindo ophansi ngokuvamile sisetshenziswa njengesandulela semvamisa ephezulu noma emaphakathi ezinhlotsheni ezihlukene zozamukeli bomsakazo, kanye namasekhethi akhulisayo emishini yokutholwa ye-elekthronikhi ezwela kakhulu. Uma kukhuliswa amasignali abuthakathaka, umsindo okhiqizwa isikhulisi ungase uphazamise kakhulu isignali. Ngakho-ke, kuthenjwa ukuthi kuzonciphisa lo msindo ukuze kuthuthukiswe isilinganiso sesignali-kuya-kumsindo wokuphumayo. Ukuwohloka kwesilinganiso sesignali-kuya-nomsindo okubangelwa isikhulisi ngokuvamile kuvezwa isibalo somsindo F.
Izikhulisamsindo eziphansiziyingxenye ebalulekile yesifunda sowamukeli, esicubungula futhi siguqule isignali eyamukelwe ibe ulwazi. Ama-LNA enzelwe ukuba seduze nedivayisi eyamukelayo ukuze kwehliswe ukulahleka kokuphazamiseka. Banikela ngenani elincane kuphela lomsindo (idatha engenamsebenzi) kusiginali eyamukelwe njengoba noma yini enye izothunaza kakhulu isignali esivele ibuthakathaka. I-LNA isetshenziswa uma isilinganiso se-signal-to-noise (SNR) siphezulu futhi sidinga ukuncishiswa cishe ngo-50% kuyilapho amandla enyuka. Ingxenye yokuqala yomamukeli ukubamba isignali yi-LNA, okuyenza ibe yingxenye ebalulekile enqubweni yezokuxhumana.
Izicelo ze-amplifier yomsindo ophansi
I-LNA ihlangabezane nokuthuthukiswa kwangaphambi kwesikhathi kwama-amplifiers epharamethiki e-helium epholile ewuketshezi kanye nezikhulisi zepharamitha zezinga lokushisa legumbi. Ngokuthuthuka okusheshayo kobuchwepheshe, ithathelwe indawo yi-microwave field-effect transistor amplifiers eminyakeni yamuva nje. Lolu hlobo lwe-amplifier lunezici ezinhle kakhulu zosayizi omncane, izindleko eziphansi, nesisindo esincane. Ikakhulukazi mayelana nezici zefrikhwensi yomsakazo, inezici zomsindo ophansi, ibhendi yefrikhwensi ebanzi, kanye nenzuzo ephezulu. Isetshenziswe kabanzi ku-C, Ku, Kv, nakwamanye amabhendi amafrikhwensi. Futhi izinga lokushisa lomsindo lezikhulisi ezikhulisa umsindo ophansi ezivame ukusetshenziswa lingaba ngaphansi kuka-45K.
Iisikhulisi somsindo ophansi (LNA)yakhelwe kakhulu izinhlelo zokusebenza zesiteshi sesisekelo sokuxhumana kwengqalasizinda yeselula, njengamakhadi okuxhumana angenantambo e-transceiver, ama-amplifiers afakwe embhoshongweni (TMA), izihlanganisi, iziphindaphinda, kanye nemishini yokuphela kwe-headband engenazintambo ekude/yedijithali. Isibalo somsindo ophansi (i-NF, Umfanekiso Womsindo) usethe izinga elisha. Njengamanje, imboni yengqalasizinda yokuxhumana okungenazintambo ibhekene nenselelo yokuhlinzeka ngekhwalithi engcono kakhulu yesignali kanye nokutholakala ku-spectrum egcwele abantu. Ukuzwela umamukeli kungenye yezidingo ezibaluleke kakhulu ekwakhiweni kwendlela yokwamukela esiteshini. Ukukhethwa kwe-LNA efanele, ikakhulukazi Izinga lokuqala le-LNA kungathuthukisa kakhulu ukusebenza okuzwelayo kwabamukeli besiteshi sesisekelo, futhi inkomba yomsindo ophansi nayo ingumgomo oyinhloko wokuklama.
Uma unezidingo zeI-LNA, welcome to enquiry: sales@cdjx-mw.com.
Isikhathi sokuthumela: Jun-13-2023
