Pakati pa ukadaulo wolumikizirana wopanda zingwe, ubale wokhawo pakati pa chipangizo cholumikizira opanda zingwe ndi antenna ya RFID system ndi womwe ndi wapadera kwambiri. Mu banja la RFID, ma antenna ndi RFID ndi mamembala ofunikira mofanana. RFID ndi ma antenna zimadalirana ndipo sizingasiyane. Kaya ndi RFID reader kapena RFID tag, kaya ndi ukadaulo wa RFID wapamwamba kwambiri kapena ukadaulo wa RFID wapamwamba kwambiri, sizingasiyane ndimlongoti.
RFIDmlongotindi chosinthira chomwe chimasintha mafunde otsogozedwa omwe amafalikira pa chingwe chotumizira mauthenga kukhala mafunde amagetsi omwe amafalikira mu malo opanda malire (nthawi zambiri malo omasuka), kapena mosemphanitsa. Antena ndi gawo la zida za wailesi zomwe zimagwiritsidwa ntchito kutumiza kapena kulandira mafunde amagetsi. Mphamvu ya chizindikiro cha mafunde a wailesi yotulutsidwa ndi chotumizira wailesi imatumizidwa ku antena kudzera mu chodyetsa (chingwe), ndipo imayatsidwa ndi antena mu mawonekedwe a mafunde amagetsi. Mafunde amagetsi akafika pamalo olandirira, amalandiridwa ndi antena (gawo laling'ono chabe la mphamvu limalandiridwa) ndikutumizidwa ku wolandila wailesi kudzera mu chodyetsa, monga momwe chithunzi chili pansipa chikuwonetsera.
Mfundo yowunikira mafunde amagetsi kuchokera ku ma antenna a RFID
Pamene waya uli ndi mphamvu yosinthira, umatulutsa mafunde amagetsi, ndipo mphamvu yake ya kuwala imakhudzana ndi kutalika ndi mawonekedwe a waya. Ngati mtunda pakati pa mawaya awiriwa uli pafupi kwambiri, mphamvu yamagetsi imalumikizidwa pakati pa mawaya awiriwa, kotero kuwala kumakhala kofooka kwambiri; pamene mawaya awiriwa afalikira padera, mphamvu yamagetsi imafalikira m'malo ozungulira, kotero kuwala kumawonjezeka. Pamene kutalika kwa waya kuli kochepa kwambiri kuposa kutalika kwa mafunde amagetsi ofalikira, kuwala kumakhala kofooka kwambiri; pamene kutalika kwa waya kuli kofanana ndi kutalika kwa mafunde amagetsi ofalikira, mphamvu yamagetsi pa waya imawonjezeka kwambiri, ndikupanga kuwala kwamphamvu. Waya wowongoka womwe watchulidwa pamwambapa womwe ungapange kuwala kwakukulu nthawi zambiri umatchedwa oscillator, ndipo oscillator ndi antenna yosavuta.
Kutalika kwa mafunde amagetsi, kukula kwa antenna kumakhala kwakukulu. Mphamvu yofunikira kutulutsidwa, kukula kwa antenna kumakhala kwakukulu.
Malangizo a antenna a RFID
Mafunde amagetsi omwe amatuluka ndi antenna ndi olunjika. Kumapeto kwa antenna, chitsogozo chimatanthauza kuthekera kwa antenna kutulutsa mafunde amagetsi mbali ina. Pa mbali yolandira, zikutanthauza kuthekera kwa antenna kulandira mafunde amagetsi kuchokera mbali zosiyanasiyana. Chithunzi cha ntchito pakati pa makhalidwe a kuwala kwa antenna ndi malo olumikizirana ndi mawonekedwe a antenna. Kusanthula mawonekedwe a antenna kumatha kusanthula makhalidwe a kuwala kwa antenna, ndiko kuti, kuthekera kwa antenna kutumiza (kapena kulandira) mafunde amagetsi mbali zonse mumlengalenga. Chitsogozo cha antenna nthawi zambiri chimayimiridwa ndi ma curve pa ndege yoyima ndi ndege yopingasa yomwe imayimira mphamvu ya mafunde amagetsi omwe amatuluka (kapena kulandiridwa) mbali zosiyanasiyana.
Mwa kusintha kofanana ndi kapangidwe ka mkati mwa antenna, kayendetsedwe ka antenna kamatha kusinthidwa, motero kupanga mitundu yosiyanasiyana ya antenna yokhala ndi makhalidwe osiyanasiyana.
RFID antenna phindu
Kuchuluka kwa ma antenna kumafotokoza mozama momwe ma antenna amatulutsira mphamvu yolowera m'njira yokhazikika. Kuchokera pamalingaliro a pateni, gawo lalikulu likachepa, gawo la m'mbali limakhala laling'ono, ndipo phindu limakwera. Mu uinjiniya, kuchuluka kwa ma antenna kumagwiritsidwa ntchito kuyeza kuthekera kwa antenna kutumiza ndi kulandira zizindikiro mbali inayake. Kuchulukitsa kuchuluka kumatha kuwonjezera kufalikira kwa netiweki mbali ina, kapena kuwonjezera malire a phindu mkati mwa mtunda winawake. Pansi pa mikhalidwe yomweyi, kuchuluka kwa phindu kumakwera, ndipo mafunde a wailesi amafalikira kwambiri.
Gulu la ma antenna a RFID
Antena ya dipole: Imatchedwanso antenna yofanana ya dipole, imakhala ndi mawaya awiri owongoka okhala ndi makulidwe ndi kutalika komweko komwe kumakonzedwa molunjika. Chizindikirocho chimalowetsedwa kuchokera kumapeto awiri pakati, ndipo kugawa kwamphamvu kudzapangidwa m'manja awiri a dipole. Kugawa kwamphamvu kumeneku kudzasangalatsa mphamvu yamagetsi pamalo ozungulira antena.
Antena ya coil: Ndi imodzi mwa ma antenna omwe amagwiritsidwa ntchito kwambiri mu RFID systems. Nthawi zambiri amapangidwa ndi mawaya omangiriridwa m'mapangidwe ozungulira kapena amakona anayi kuti athe kulandira ndi kutumiza zizindikiro zamagetsi.
Antena ya RF yolumikizidwa mozungulira: Antena ya RF yolumikizidwa mozungulira nthawi zambiri imagwiritsidwa ntchito polumikizana pakati pa owerenga RF ndi ma tag a RFID. Amalumikizana kudzera mu mphamvu ya maginito yogawana. Antena izi nthawi zambiri zimakhala mu mawonekedwe ozungulira kuti apange mphamvu ya maginito yogawana pakati pa owerenga RFID ndi chizindikiro cha RFID.
Antena ya Microstrip patch: Nthawi zambiri imakhala ndi chigamba chachitsulo cholumikizidwa pansi. Antena ya Microstrip patch ndi yopepuka, yaying'ono kukula, komanso yopyapyala m'magawo. Netiweki yodyetsa ndi yofananira imatha kupangidwa nthawi yomweyo ndi antena, ndipo imagwirizana kwambiri ndi njira yolumikizirana. Ma circuits osindikizidwa amaphatikizidwa pamodzi, ndipo zigamba zimatha kupangidwa pogwiritsa ntchito njira zojambulira zithunzi, zomwe ndi zotsika mtengo komanso zosavuta kupanga zambiri.
Antena ya Yagi: ndi antenna yolunjika yokhala ndi ma dipole awiri kapena kuposerapo a theka la mafunde. Nthawi zambiri amagwiritsidwa ntchito kukulitsa mphamvu ya chizindikiro kapena kuyendetsa mauthenga opanda zingwe.
Antena yokhala ndi Cavity-backed: Ndi antena yomwe antena ndi chodyetsera zimayikidwa kumbuyo komweko. Amagwiritsidwa ntchito kwambiri m'makina a RFID apamwamba kwambiri ndipo amatha kupereka chizindikiro chabwino komanso kukhazikika.
Antena yolunjika ya Microstrip: Ndi antena yaying'ono komanso yopyapyala, yomwe nthawi zambiri imagwiritsidwa ntchito pazida zazing'ono monga mafoni ndi ma RFID tag. Amapangidwa kuchokera ku mizere ya microstrip yomwe imapereka magwiridwe antchito abwino mu kukula kochepa.
Antena Yozungulira: Antena yomwe imatha kulandira ndi kutumiza mafunde amagetsi ozungulira okhala ndi polarized. Nthawi zambiri amapangidwa ndi waya wachitsulo kapena chitsulo ndipo amakhala ndi kapangidwe kamodzi kapena zingapo zozungulira.
Pali mitundu yambiri ya ma antenna ogwiritsidwa ntchito m'njira zosiyanasiyana monga ma frequency osiyanasiyana, zolinga zosiyanasiyana, zochitika zosiyanasiyana, ndi zofunikira zosiyanasiyana. Mtundu uliwonse wa antenna uli ndi mawonekedwe ake apadera komanso zochitika zoyenera. Mukasankha antenna yoyenera ya RFID, muyenera kusankha kutengera zomwe mukufuna kugwiritsa ntchito komanso momwe zinthu zilili.
Kuti mudziwe zambiri zokhudza ma antenna, chonde pitani ku:
Foni: 0086-028-82695327
Nthawi yotumizira: Meyi-15-2024
