Nkhani

Ma Multiplexers ndi Ma Power Dividers onse ndi zida zothandiza kukulitsa chiwerengero cha ma antenna omwe angalumikizidwe ku doko la wowerenga m'modzi. Chimodzi mwazabwino zazikulu ndikuchepetsa mtengo wa pulogalamu ya UHF RFID pogawana zida zodula. Mu positi iyi ya blog, tikufotokoza kusiyana ndi zomwe ziyenera kuganiziridwa posankha chipangizo choyenera pulogalamu yanu.

Kodi multiplexer ndi de-multiplexer ndi chiyani?

Kuti timvetse bwino tanthauzo la RFID reader Multiplexer, tifotokoza mwachangu cholinga chachikulu cha multiplexers (mux) ndi de-multiplexers (de-mux).

Multiplexer ndi chipangizo chomwe chimasankha chimodzi mwa zizindikiro zingapo zolowera ndikuchitumiza ku chotulutsa.

Chotsegula ma multiplexer ndi chipangizo chomwe chimatumiza chizindikiro cholowera ku chimodzi mwa zotuluka zingapo.

Ma multiplexer ndi de-multiplexer onse amafuna ma switch kuti asankhe zolowetsa ndi/kapena zotuluka. Ma switch awa amayendetsedwa ndi magetsi, motero mux ndi de-mux ndi zida zogwira ntchito.

Kodi RFID reader multiplexer ndi chiyani?

Chowerengera cha RFID ndi chipangizo chomwe chimaphatikiza mux ndi de-mux. Chimakhala ndi doko limodzi lolowera/lotulutsa ndi madoko ambiri otulutsira/lolowetsa. Doko limodzi la mux/de-mux nthawi zambiri limalumikizidwa ndi chowerengera cha RFID pomwe madoko angapo amaperekedwa kuti alumikizane ndi antenna.

Imatumiza chizindikiro kuchokera ku doko la wowerenga RFID kupita ku imodzi mwa ma doko angapo otulutsa kapena kutumiza zizindikiro kuchokera ku imodzi mwa ma doko angapo olowetsa kupita ku doko la wowerenga RFID.

Chosinthira chomangidwa mkati chimasamalira kusintha kwa chizindikiro pakati pa madoko ndi nthawi yake yosinthira.

Chowonjezera cha RFID chimalola kulumikizana kwa ma antenna angapo ku doko limodzi la wowerenga RFID. Kukula kwa chizindikiro chosinthidwa sikukhudzidwa kwambiri, mosasamala kanthu za kuchuluka kwa ma doko mu mux/de-mux.

Mwanjira imeneyi, chowerengera cha RFID cha madoko 8, mwachitsanzo, chingawonjezere chowerengera cha madoko 4 kukhala chowerengera cha RFID cha madoko 32.

Makampani ena amatchanso kuti mux yawo ndi hub.

Kodi chogawa mphamvu (chogawa mphamvu) ndi chophatikiza mphamvu ndi chiyani?

Chogawa mphamvu (chogawa mphamvu) ndi chipangizo chomwe chimagawa mphamvu. Chogawa mphamvu cha madoko awiri chimagawa mphamvu yolowera m'magawo awiri otulutsa mphamvu. Kukula kwa mphamvu kumachepetsedwa ndi theka m'magawo otulutsa mphamvu.

Chogawa mphamvu chimatchedwa chophatikiza mphamvu chikagwiritsidwa ntchito motsatizana.

Nayi chidule cha kusiyana pakati pa mux ndi power divider:

MUX	WOGAWIRA MPHAMVU
Mux imakhala ndi kutayika kwa mphamvu kosalekeza m'madoko onse mosasamala kanthu za kuchuluka kwa madoko. Mux ya madoko anayi, madoko asanu ndi atatu, ndi madoko khumi ndi asanu ndi limodzi sidzakhala ndi kutayika kosiyana pa doko lililonse.	Chogawa mphamvu chimagawa mphamvu mu ½ kapena ¼ ​​kutengera kuchuluka kwa madoko omwe alipo. Kuchepa kwa mphamvu kumachitika mu doko lililonse pamene chiwerengero cha madoko chikuwonjezeka.
Mux ndi chipangizo chogwira ntchito. Chimafuna mphamvu ya DC ndi zizindikiro zowongolera kuti chigwire ntchito.	Chogawa mphamvu ndi chipangizo chopanda mphamvu. Sichifuna chowonjezera china kuposa cholowetsa cha RF.
Si ma port onse omwe ali mu multi-port mux omwe amayatsidwa nthawi imodzi. Mphamvu ya RF imasinthidwa pakati pa ma port. Antena imodzi yokha yolumikizidwa idzagwiritsidwa ntchito nthawi imodzi, ndipo liwiro la kusinthana ndi lachangu kwambiri kotero kuti ma antenna sadzaphonya kuwerenga chizindikiro.	Madoko onse omwe ali mu chogawa mphamvu cha madoko ambiri amalandira mphamvu mofanana komanso nthawi imodzi.
Kutalikirana kwakukulu pakati pa madoko kumachitika. Izi ndizofunikira kuti tipewe kuwerenga ma cross-tag pakati pa ma antenna. Kutalikirana nthawi zambiri kumakhala pakati pa 35 dB kapena kuposerapo.	Kupatula kwa madoko ndikochepa poyerekeza ndi Mux. Kupatula kwa madoko kofala kumakhala pafupifupi 20 dB kapena kuposerapo. Kuwerenga kwa ma tag osiyanasiyana kungakhale vuto.
Sizimakhudza kwambiri kuwala kwa antenna kapena kuletsa kwake.	Ngati chogawa mphamvu sichikugwiritsidwa ntchito moyenera, minda ya RF ikhoza kuthetsedwa, ndipo kuwala kwa RF kwa antenna kumatha kusinthidwa kwambiri.
Palibe ukadaulo wa RF wofunikira kuti muyike Mux. Mux iyenera kuyendetsedwa ndi pulogalamu ya RFID reader.	Ukadaulo wa RF ndi wofunikira kwambiri poyika zogawa mphamvu ndikupeza njira yogwirira ntchito. Chogawa mphamvu chosayikidwa bwino chingawononge kwambiri magwiridwe antchito a RF.
Palibe kusintha kwa antenna komwe kungatheke	Kusintha kwa antenna mwamakonda n'kotheka. M'lifupi mwa chitsulo cha antenna, ngodya ya chitsulo, ndi zina zotero zingasinthidwe.

Si Chuan Keenlion Microwave ndi yosankhidwa kwambiri, yokhala ndi ma frequency kuyambira 0.5 mpaka 50 GHz. Yapangidwa kuti igwire mphamvu yolowera ya ma watts 10 mpaka 200 mu makina otumizira ma transmission a 50-ohm. Mapangidwe a cavity amagwiritsidwa ntchito, ndipo amakonzedwa bwino kuti agwire ntchito bwino.

Zinthu zathu zambiri zimapangidwa mwanjira yoti zitha kuyikidwa pa heatsink, ngati pakufunika kutero. Zilinso ndi ma amplitude abwino kwambiri komanso phase balance, zimakhala ndi mphamvu zambiri, zimakhala ndi ma level abwino kwambiri odzipatula ndipo zimabwera ndi ma package olimba.

Tikhozanso kusintha mtundu wa rf passive malinga ndi zomwe mukufuna. Mutha kulowa mukusinthatsamba kuti likupatseni zofunikira zomwe mukufuna.