Izindaba

Ama-Multiplexers kanye nama-Power Dividers amadivayisi awusizo ukwandisa inani lama-antenna angaxhunywa echwebeni lomfundi oyedwa. Enye yezinzuzo eziyinhloko ukunciphisa izindleko zohlelo lokusebenza lwe-UHF RFID ngokwabelana ngehadiwe ebizayo. Kulesi sihloko sebhulogi, sichaza umehluko nokuthi yini okudingeka icatshangelwe lapho ukhetha idivayisi efanele uhlelo lwakho lokusebenza.

Iyini i-multiplexer kanye ne-de-multiplexer?

Ukuze siqonde ukuthi iyini i-RFID reader Multiplexer, sizochaza ngokushesha injongo evamile yama-multiplexers (mux) kanye nama-de-multiplexers (de-mux).

I-multiplexer iyidivayisi ekhetha enye yezimpawu zokufaka eziningana bese iyithumela ku-output.

I-demultiplexer iyithuluzi elidlulisela isignali yokufaka kwenye yemiphumela eminingana.

Kokubili i-multiplexer kanye ne-de-multiplexer zidinga ukushintsha ukuze zikhethe okufakwayo kanye/noma okukhishwayo. Lawa ma-switch asebenza ngamandla, ngakho-ke i-mux kanye ne-de-mux ngamadivayisi asebenzayo.

Iyini i-RFID reader multiplexer?

I-RFID reader multiplexer iyidivayisi eyinhlanganisela ye-mux ne-de-mux. Iqukethe imbobo eyodwa yokufaka/yokukhipha kanye nama-port amaningi okukhipha/okufaka. Imbobo eyodwa ye-mux/de-mux ivame ukuxhunywa kumfundi we-RFID kuyilapho ama-port amaningi enikezelwe uxhumano lwe-antenna.

Idlulisela isignali kusuka echwebeni lomfundi we-RFID iye kwenye yamachweba amaningi okukhipha noma idlulisela isignali kusuka kwenye yamachweba amaningi okufaka iye echwebeni lomfundi we-RFID.

Iswishi eyakhelwe ngaphakathi inakekela ukushintsha kwesignali phakathi kwama-port kanye nesikhathi sayo sokushintsha.

I-RFID multiplexer ivumela ukuxhumana kwe-antenna eminingi echwebeni elilodwa le-RFID reader. Ubukhulu besiginali eshintshiwe abuthinteki kakhulu, kungakhathaliseki ukuthi inani lamachweba lingakanani ku-mux/de-mux.

Ngaleyo ndlela, i-multiplexer ye-RFID enamachweba angu-8, isibonelo, inganweba i-4-port reader ibe yi-32-port RFID reader.

Amanye amabhrendi abiza i-mux yawo ngokuthi i-hub.

Iyini i-power divider (i-power splitter) kanye ne-power combiner?

Isihlukanisi samandla (i-splitter) yidivayisi ehlukanisa amandla. Isihlukanisi samandla esinamachweba amabili sihlukanisa amandla okufaka abe yimiphumela emibili. Ubukhulu bamandla buncishiswa ngesigamu kumachweba okukhipha.

Isihlukanisi samandla sibizwa ngokuthi i-power combiner uma sisetshenziswa ngokuphambene.

Nasi isifinyezo esifushane somehluko phakathi kwe-mux ne-power divider:

I-MUX	UMHLULELI WAMANDLA
I-mux izolahlekelwa amandla njalo kuzo zonke izimbobo kungakhathaliseki ukuthi zingakanani izimbobo. I-mux enamachweba amane, amachweba angu-8, kanye namachweba angu-16 ngeke ibe nokulahlekelwa okuhlukile ngembobo ngayinye.	Isihlukanisi samandla singahlukanisa amandla abe yi-½ noma i-¼ kuye ngenani lamachweba atholakalayo. Ukwehla kwamandla okukhulu kwenzeka echwebeni ngalinye njengoba inani lamachweba landa.
I-mux iyidivayisi esebenzayo. Idinga amandla e-DC kanye nezimpawu zokulawula ukuze isebenze.	Isihlukanisi samandla siyidivayisi engenzi lutho. Ayidingi okunye ukufaka okwengeziwe kunokufaka kwe-RF.
Akuwona wonke ama-port ku-mux enama-port amaningi avulwa ngesikhathi esisodwa. Amandla e-RF ashintshwa phakathi kwama-port. I-antenna eyodwa kuphela exhunyiwe izonikwa amandla ngesikhathi esisodwa, futhi isivinini sokushintsha sishesha kakhulu kangangokuthi ama-antenna ngeke aphuthelwe ukufundwa kwethegi.	Zonke izimbobo eziku-multi-port power divider zithola amandla ngokulinganayo nangesikhathi esifanayo.
Ukuhlukaniswa okuphezulu kakhulu phakathi kwamachweba kufezwa. Lokhu kubalulekile ukuze kugwenywe ukufundwa kwe-cross-tag phakathi kwama-antenna. Ukuhlukaniswa ngokuvamile kuba sebangeni elingama-35 dB noma ngaphezulu.	Ukuhlukaniswa kwe-port kuncane kakhulu uma kuqhathaniswa ne-Mux. Ukuhlukaniswa kwe-port okuvamile kungama-20 dB noma ngaphezulu. Ukufundwa kwe-cross tag kungaba yinkinga.
Inomthelela omncane noma ayinawo nhlobo umthelela emisebeni ye-antenna noma ekukhanseleni.	Uma isihlukanisi samandla singasetshenziswa ngendlela efanele, amasimu e-RF angakhanselwa, futhi umsebe we-RF we-antenna ungashintshwa kakhulu.
Akukho buchwepheshe be-RF obudingekayo ukufaka i-Mux. I-Mux kuzodingeka ilawulwe yisofthiwe yomfundi we-RFID.	Ubuchwepheshe be-RF bubalulekile ekufakeni izihlukanisi zamandla nokufeza ikhambi elisebenzayo. Isihlukanisi samandla esifakwe ngendlela engafanele singonakalisa kakhulu ukusebenza kwe-RF.
Akukho ukuguqulwa kwe-antenna ngokwezifiso okungenzeka	Ukuguqulwa kwe-antenna ngokwezifiso kuyasebenza. Ububanzi be-beam ye-antenna, i-angle ye-beam, njll. kungashintshwa.

I-Si Chuan Keenlion Microwave iyi-Microwave ekhethiwe enkulu, ehlanganisa amaza omsindo asukela ku-0.5 kuya ku-50 GHz. Zenzelwe ukuphatha amandla okufaka asukela ku-10 kuya ku-200 watts ohlelweni lokudlulisa olungama-ohm angu-50. Kusetshenziswa imiklamo ye-Cavity, futhi ilungiselelwe ukusebenza kahle kakhulu.

Imikhiqizo yethu eminingi iklanyelwe ngendlela yokuthi ingafakwa ku-heatsink, uma kudingeka. Iphinde ibe ne-amplitude kanye ne-phase balance emangalisayo, inokuphathwa kwamandla aphezulu, amazinga amahle kakhulu okuhlukaniswa futhi iza nephakheji eqinile.

Singakwazi futhi ukwenza ngokwezifiso umkhiqizo we-rf passive ngokwezidingo zakho. Ungangena ku-ukwenza ngokwezifisoikhasi ukuze unikeze imininingwane oyidingayo.