{"id":15040,"date":"2026-05-28T03:24:34","date_gmt":"2026-05-28T03:24:34","guid":{"rendered":"https:\/\/custom-rfid-tags.com\/?p=15040"},"modified":"2026-05-28T03:24:36","modified_gmt":"2026-05-28T03:24:36","slug":"does-aluminum-foil-block-rfid","status":"publish","type":"post","link":"https:\/\/custom-rfid-tags.com\/cs\/does-aluminum-foil-block-rfid\/","title":{"rendered":"Blokuje hlin\u00edkov\u00e1 f\u00f3lie RFID"},"content":{"rendered":"

Ano, hlin\u00edkov\u00e1 f\u00f3lie \u010dasto blokuje RFID, zejm\u00e9na pokud zcela zakr\u00fdv\u00e1 kartu nebo \u0161t\u00edtek. Nen\u00ed to v\u0161ak ot\u00e1zka, zda ano, nebo ne. R\u016fzn\u00e9 p\u00e1sy RFID reaguj\u00ed na kov r\u016fzn\u011b. LF tagy jsou obvykle tolerantn\u011bj\u0161\u00ed, zat\u00edmco HF a NFC<\/a> mohou v bl\u00edzkosti kovu ztr\u00e1cet v\u00fdkon, proto\u017ee pole je naru\u0161eno. Standardn\u00ed tagy UHF jsou tak\u00e9 velmi citliv\u00e9 na kov, proto\u017ee odraz a rozlad\u011bn\u00ed mohou zna\u010dn\u011b zt\u00ed\u017eit jejich \u010dten\u00ed.\u00a0<\/p>\n\n\n\n

Proto m\u016f\u017ee hlin\u00edkov\u00e1 f\u00f3lie blokovat, oslabovat nebo destabilizovat RFID a p\u0159esn\u00fd v\u00fdsledek z\u00e1vis\u00ed na typu RFID, se kter\u00fdm se pracuje.<\/p>\n\n\n\n

Pro\u010d hlin\u00edkov\u00e1 f\u00f3lie ovliv\u0148uje sign\u00e1ly RFID<\/strong><\/h2>\n\n\n\n

Hlin\u00edkov\u00e1 f\u00f3lie m\u00e1 vliv na RFID, proto\u017ee je vodiv\u00e1. RFID neproch\u00e1z\u00ed f\u00f3li\u00ed tak, jako proch\u00e1z\u00ed pap\u00edrem, plastem nebo l\u00e1tkou. Jakmile se kov p\u0159ibl\u00ed\u017e\u00ed k tagu nebo kart\u011b, za\u010dne interagovat s energi\u00ed, kterou syst\u00e9m RFID pou\u017e\u00edv\u00e1 ke komunikaci.<\/p>\n\n\n\n

\"blokuje<\/figure>\n\n\n\n

F\u00f3lie je vodiv\u00e1<\/strong><\/h3>\n\n\n\n

To je d\u016fle\u017eit\u00e9, proto\u017ee vodiv\u00fd materi\u00e1l neslou\u017e\u00ed jen jako neutr\u00e1ln\u00ed kryt. St\u00e1v\u00e1 se sou\u010d\u00e1st\u00ed elektrick\u00e9ho prost\u0159ed\u00ed kolem zna\u010dky. V syst\u00e9mech HF a NFC m\u016f\u017ee kov v bl\u00edzkosti ant\u00e9ny vytv\u00e1\u0159et v\u00ed\u0159iv\u00e9 proudy. Tyto proudy vytv\u00e1\u0159ej\u00ed opa\u010dn\u00e9 magnetick\u00e9 pole, pohlcuj\u00ed energii a oddaluj\u00ed ant\u00e9nu od jej\u00edho zam\u00fd\u0161len\u00e9ho nalad\u011bn\u00ed.<\/p>\n\n\n\n

Zasahuje do elektromagnetick\u00e9ho pole<\/strong><\/h3>\n\n\n\n

Technologie RFID je z\u00e1visl\u00e1 na stabiln\u00edm poli mezi \u010dte\u010dkou a zna\u010dkou. F\u00f3lie m\u016f\u017ee toto pole naru\u0161it d\u0159\u00edve, ne\u017e tag z\u00edsk\u00e1 dostatek energie k reakci, co\u017e m\u016f\u017ee zkr\u00e1tit \u010dtec\u00ed dosah, zp\u016fsobit nekonzistentn\u00ed \u010dten\u00ed nebo \u010dten\u00ed zcela zastavit. Bl\u00edzkost kovu sni\u017euje induk\u010dnost a faktor kvality, a proto se \u010dasto p\u0159id\u00e1v\u00e1 feritov\u00e9 st\u00edn\u011bn\u00ed, pokud mus\u00ed ant\u00e9ny NFC pracovat v bl\u00edzkosti kovu.<\/p>\n\n\n\n

M\u016f\u017ee odr\u00e1\u017eet, pohlcovat nebo ru\u0161it energii RFID<\/strong><\/h3>\n\n\n\n

F\u00f3lie neovliv\u0148uje ka\u017ed\u00fd syst\u00e9m RFID \u00fapln\u011b stejn\u011b, ale hlavn\u00ed probl\u00e9my jsou stejn\u00e9. Kov m\u016f\u017ee absorbovat \u010d\u00e1st energie, odr\u00e1\u017eet RF vlny a ru\u0161it ant\u00e9nu tagu. V syst\u00e9mech UHF mohou odra\u017een\u00e9 vlny vytv\u00e1\u0159et destruktivn\u00ed ru\u0161en\u00ed, n\u011bkdy naz\u00fdvan\u00e9 nulov\u00e9 z\u00f3ny, a kov p\u0159\u00edmo proti tagu m\u016f\u017ee rozladit ant\u00e9nu natolik, \u017ee je tag ne\u010diteln\u00fd nebo mnohem h\u016f\u0159e \u010diteln\u00fd. <\/p>\n\n\n\n

Jak frekvence RFID m\u011bn\u00ed v\u00fdsledek<\/strong><\/h2>\n\n\n\n

F\u00f3lie m\u016f\u017ee ru\u0161it RFID, ale v\u00fdsledek nen\u00ed u ka\u017ed\u00e9ho typu RFID stejn\u00fd. Nejv\u011bt\u0161\u00edm d\u016fvodem je frekvence. LF, HF\/NFC a UHF pou\u017e\u00edvaj\u00ed r\u016fzn\u00e9 pracovn\u00ed rozsahy a reaguj\u00ed odli\u0161n\u011b, pokud je kov v bl\u00edzkosti tagu nebo ant\u00e9ny.<\/p>\n\n\n\n

LF RFID<\/strong><\/h3>\n\n\n\n

LF RFID si obvykle porad\u00ed s obt\u00ed\u017en\u00fdmi materi\u00e1ly l\u00e9pe ne\u017e syst\u00e9my s vy\u0161\u0161\u00ed frekvenc\u00ed. Tagy v 125 kHz<\/a> nebo 134,2 kHz jsou \u010dasto tolerantn\u011bj\u0161\u00ed, kdy\u017e jsou p\u0159ipojeny k r\u016fzn\u00fdm povrch\u016fm nebo um\u00edst\u011bny v jejich bl\u00edzkosti, tak\u017ee f\u00f3lie je ne v\u017edy vypne tak snadno, jak lid\u00e9 o\u010dek\u00e1vaj\u00ed. Neznamen\u00e1 to v\u0161ak, \u017ee f\u00f3lie nem\u00e1 \u017e\u00e1dn\u00fd vliv, ale LF je v takov\u00e9 situaci obecn\u011b m\u00e9n\u011b citliv\u00e1 ne\u017e HF, NFC nebo standardn\u00ed UHF \u0161t\u00edtky.<\/p>\n\n\n\n

HF a NFC na frekvenci 13,56 MHz<\/strong><\/h3>\n\n\n\n

HF a NFC lze \u010dasto sn\u00e1ze naru\u0161it pomoc\u00ed f\u00f3lie. Tyto syst\u00e9my se spol\u00e9haj\u00ed na induk\u010dn\u00ed vazbu mezi ant\u00e9nou \u010dte\u010dky a ant\u00e9nou tagu, tak\u017ee bl\u00edzk\u00fd kov m\u011bn\u00ed magnetick\u00e9 pole, na kter\u00e9m je syst\u00e9m z\u00e1visl\u00fd. Jakmile se f\u00f3lie p\u0159ibl\u00ed\u017e\u00ed, m\u016f\u017ee vytv\u00e1\u0159et v\u00ed\u0159iv\u00e9 proudy, odv\u00e1d\u011bt energii od tagu a rozladit ant\u00e9nu. Proto m\u016f\u017ee karta nebo tag NFC na voln\u00e9m prostranstv\u00ed norm\u00e1ln\u011b fungovat, ale jakmile je pevn\u011b zabalen do f\u00f3lie nebo um\u00edst\u011bn p\u0159\u00edmo ke kovu, m\u016f\u017ee selhat.<\/p>\n\n\n\n

UHF RFID<\/strong><\/h3>\n\n\n\n

UHF RFID je obvykle nejcitliv\u011bj\u0161\u00ed na f\u00f3lie a kovy, zejm\u00e9na u b\u011b\u017en\u00fdch pasivn\u00edch \u0161t\u00edtk\u016f. \u0160t\u00edtky UHF jsou do zna\u010dn\u00e9 m\u00edry z\u00e1visl\u00e9 na chov\u00e1n\u00ed ant\u00e9ny a okoln\u00edm r\u00e1diov\u00e9m prost\u0159ed\u00ed, tak\u017ee f\u00f3lie m\u016f\u017ee oslabit komunikaci, rozladit \u0161t\u00edtek a zp\u016fsobit nestabilitu \u010dten\u00ed. Standardn\u00ed UHF \u0161t\u00edtky maj\u00ed \u010dasto probl\u00e9my v okol\u00ed kovu, tak\u017ee mnoho lid\u00ed hled\u00e1 p\u0159edev\u0161\u00edm specializovan\u00e9 \u0161t\u00edtky na kov a konstrukce pro mont\u00e1\u017e na kov. <\/p>\n\n\n\n

Co se je\u0161t\u011b zm\u011bn\u00ed, kdy\u017e hlin\u00edkov\u00e1 f\u00f3lie blokuje RFID?<\/strong><\/h2>\n\n\n\n

Frekvence je jen \u010d\u00e1st\u00ed odpov\u011bdi. I p\u0159i stejn\u00e9 frekvenci RFID m\u016f\u017ee hlin\u00edkov\u00e1 f\u00f3lie jeden tag zcela zablokovat a jin\u00fd pouze oslabit. Rozd\u00edl \u010dasto vych\u00e1z\u00ed z toho, jak je tag pou\u017e\u00edv\u00e1n a co je kolem n\u011bj, v\u010detn\u011b toho, jak velk\u00e1 \u010d\u00e1st tagu je zakryta, kde se f\u00f3lie nach\u00e1z\u00ed a zda je tag navr\u017een pro pou\u017eit\u00ed v bl\u00edzkosti kovu.<\/p>\n\n\n\n

Pln\u011b zabalen\u00fd \u0161t\u00edtek nebo karta<\/strong><\/h3>\n\n\n\n

\u00dapln\u00e9 zabalen\u00ed d\u00e1v\u00e1 f\u00f3lii nejlep\u0161\u00ed \u0161anci na zablokov\u00e1n\u00ed \u010dten\u00ed RFID. Pokud je tag nebo karta pokryta ze v\u0161ech stran, je mnohem pravd\u011bpodobn\u011bj\u0161\u00ed, \u017ee f\u00f3lie p\u0159eru\u0161\u00ed pole kolem n\u00ed a zabr\u00e1n\u00ed norm\u00e1ln\u00ed komunikaci. T\u011bsn\u011b uzav\u0159en\u00e1 karta obvykle blokuje l\u00e9pe ne\u017e karta, kter\u00e1 m\u00e1 zakrytou pouze jednu stranu.<\/p>\n\n\n\n

\u010c\u00e1ste\u010dn\u011b zakryt\u00fd \u0161t\u00edtek<\/strong><\/h3>\n\n\n\n

\u010c\u00e1ste\u010dn\u00e9 pokryt\u00ed je m\u00e9n\u011b p\u0159edv\u00eddateln\u00e9. V n\u011bkter\u00fdch p\u0159\u00edpadech m\u016f\u017ee sn\u00ed\u017eit rozsah \u010dten\u00ed nebo zp\u016fsobit, \u017ee \u010dten\u00ed nebude zcela zastaveno. Pokud je \u010d\u00e1st plochy ant\u00e9ny st\u00e1le odkryt\u00e1, m\u016f\u017ee \u010dte\u010dka st\u00e1le z\u00edskat dostatek sign\u00e1lu pro nap\u00e1jen\u00ed tagu a dokon\u010den\u00ed \u010dten\u00ed, zejm\u00e9na na kr\u00e1tkou vzd\u00e1lenost.<\/p>\n\n\n\n

Voln\u00e1 f\u00f3lie s mezerami<\/strong><\/h3>\n\n\n\n

Voln\u00e1 f\u00f3lie se z\u00e1hyby, otvory nebo mezerami je rovn\u011b\u017e m\u00e9n\u011b spolehliv\u00e1. Jakmile je st\u00edn\u011bn\u00ed ne\u00fapln\u00e9, m\u016f\u017ee se v\u00fdsledek zm\u011bnit z \u00fapln\u00e9ho blokov\u00e1n\u00ed na \u010d\u00e1ste\u010dn\u00e9 ru\u0161en\u00ed. <\/p>\n\n\n\n

F\u00f3lie v bl\u00edzkosti \u0161t\u00edtku m\u00edsto jeho obt\u00e9k\u00e1n\u00ed<\/strong><\/p>\n\n\n\n

F\u00f3lie se nemus\u00ed v\u017edy dot\u00fdkat zna\u010dky, aby zp\u016fsobila probl\u00e9my. Kov v bl\u00edzkosti tagu nebo ve \u010dtec\u00edm prost\u0159ed\u00ed m\u016f\u017ee st\u00e1le odr\u00e1\u017eet energii, rozladit ant\u00e9nu nebo vytvo\u0159it nulov\u00e9 z\u00f3ny, kv\u016fli kter\u00fdm je \u010dten\u00ed slab\u0161\u00ed nebo m\u00e9n\u011b konzistentn\u00ed. Zejm\u00e9na v syst\u00e9mech UHF m\u016f\u017ee bl\u00edzk\u00fd kov v prost\u0159ed\u00ed zm\u011bnit \u010dtec\u00ed z\u00f3nu, i kdy\u017e tag nen\u00ed v\u016fbec zabalen.<\/p>\n\n\n\n

Jeden \u0161t\u00edtek vs. \u0161t\u00edtek p\u0159ipojen\u00fd k obalu v\u00fdrobku<\/strong><\/h3>\n\n\n\n

Jedin\u00e1 voln\u00e1 karti\u010dka nebo visa\u010dka se l\u00e9pe vysv\u011btluje ne\u017e visa\u010dka p\u0159ipojen\u00e1 ke skute\u010dn\u00e9mu obalu. Jakmile je visa\u010dka p\u0159ipevn\u011bna na v\u00fdrobek, okoln\u00ed materi\u00e1ly mohou zm\u011bnit v\u00fdsledek. Obal z f\u00f3lie, metalizovan\u00e9 vrstvy nebo bl\u00edzk\u00e9 kovov\u00e9 \u010d\u00e1sti mohou ru\u0161it zna\u010dku mnohem v\u00edce, ne\u017e by nazna\u010doval jednoduch\u00fd test pod \u0161ir\u00fdm nebem.<\/p>\n\n\n\n

Oby\u010dejn\u00fd \u0161t\u00edtek vs. Anti-Metal Tag<\/a><\/strong><\/h3>\n\n\n\n
\"Kovov\u00e1
Kovov\u00e1 mont\u00e1\u017e tag\u016f RFID<\/figcaption><\/figure>\n\n\n\n

Na designu \u0161t\u00edtk\u016f hodn\u011b z\u00e1le\u017e\u00ed. Standardn\u00ed \u0161t\u00edtek RFID \u010dasto funguje \u0161patn\u011b v bl\u00edzkosti kovu, proto\u017ee ant\u00e9na se m\u016f\u017ee rozladit nebo odra\u017een\u00e1 energie m\u016f\u017ee naru\u0161it \u010dten\u00ed. Anti-metal nebo na kovov\u00fdch \u0161t\u00edtc\u00edch<\/a> jsou konstruov\u00e1ny jinak, \u010dasto s distan\u010dn\u00edmi prvky nebo s konstrukc\u00ed p\u0159izp\u016fsobenou kovov\u00fdm povrch\u016fm, tak\u017ee mohou fungovat i v m\u00edstech, kde by b\u011b\u017en\u00fd \u0161t\u00edtek selhal.<\/p>\n\n\n\n

Blokuje hlin\u00edkov\u00e1 f\u00f3lie b\u011b\u017en\u00e9 p\u0159edm\u011bty RFID?<\/strong><\/h2>\n\n\n\n

Pot\u00e9, co se pod\u00edv\u00e1me na frekvenci a konstrukci tag\u016f, je dobr\u00e9 se pod\u00edvat na skute\u010dn\u00e9 polo\u017eky RFID, kter\u00e9 lid\u00e9 nej\u010dast\u011bji pou\u017e\u00edvaj\u00ed. <\/p>\n\n\n\n

Blokuje hlin\u00edkov\u00e1 f\u00f3lie karty NFC?<\/strong><\/h3>\n\n\n\n

\u010casto ano. Karty NFC pou\u017e\u00edvaj\u00ed technologii 13,56 MHz a kov v bl\u00edzkosti ant\u00e9ny m\u016f\u017ee vytv\u00e1\u0159et v\u00ed\u0159iv\u00e9 proudy, absorbovat energii a rozladit ant\u00e9nu. U pevn\u011b zabalen\u00e9 karty NFC je mnohem v\u011bt\u0161\u00ed pravd\u011bpodobnost selh\u00e1n\u00ed ne\u017e u karty, kter\u00e1 je jen \u010d\u00e1ste\u010dn\u011b zakryt\u00e1.<\/p>\n\n\n\n

Blokuje hlin\u00edkov\u00e1 f\u00f3lie kreditn\u00ed karty RFID?<\/strong><\/h3>\n\n\n\n

Bezkontaktn\u00ed platebn\u00ed karty jsou jedn\u00edm z nej\u010dast\u011bj\u0161\u00edch p\u0159\u00edklad\u016f, kter\u00e9 maj\u00ed lid\u00e9 na mysli, kdy\u017e si kladou tuto ot\u00e1zku. Vzhledem k tomu, \u017ee bezkontaktn\u00ed platby kartou vyu\u017e\u00edvaj\u00ed komunikaci typu NFC na frekvenci 13,56 MHz, m\u016f\u017ee f\u00f3lie \u010dasto zablokovat nebo oslabit \u010dten\u00ed, pokud je karta zcela uzav\u0159en\u00e1. Pokud je v\u0161ak pokryt\u00ed f\u00f3li\u00ed ne\u00fapln\u00e9, karta m\u016f\u017ee b\u00fdt p\u0159esto p\u0159e\u010dtena na kr\u00e1tkou vzd\u00e1lenost.<\/p>\n\n\n\n

Blokuje hlin\u00edkov\u00e1 f\u00f3lie \u0161t\u00edtky UHF RFID?<\/strong><\/h3>\n\n\n\n

Obvykle ano, a \u010dasto velmi efektivn\u011b pomoc\u00ed standardn\u00edch \u0161t\u00edtk\u016f. \u0160t\u00edtky UHF RFID jsou velmi citliv\u00e9 na kov, tak\u017ee f\u00f3lie m\u016f\u017ee \u0161t\u00edtek rozladit a naru\u0161it \u010dtec\u00ed z\u00f3nu natolik, \u017ee se norm\u00e1ln\u00ed \u010dten\u00ed zastav\u00ed. To je jeden z d\u016fvod\u016f, pro\u010d existuj\u00ed tagy UHF s kovovou mont\u00e1\u017e\u00ed a na kovu. U standardn\u00edho \u0161t\u00edtku UHF na f\u00f3liov\u00e9m obalu nebo v bl\u00edzkosti metalizovan\u00e9 vrstvy je mnohem pravd\u011bpodobn\u011bj\u0161\u00ed, \u017ee bude m\u00edt probl\u00e9my se \u010dten\u00edm ne\u017e \u0161t\u00edtek ur\u010den\u00fd pro toto prost\u0159ed\u00ed.<\/p>\n\n\n\n

Blokuje hlin\u00edkov\u00e1 f\u00f3lie kl\u00ed\u010denky nebo p\u0159\u00edstupov\u00e9 karty?<\/strong><\/h3>\n\n\n\n

Z\u00e1le\u017e\u00ed na technologii, kter\u00e1 je v nich obsa\u017eena. N\u011bkter\u00e9 p\u0159\u00edstupov\u00e9 \u00fadaje pou\u017e\u00edvaj\u00ed bezkontaktn\u00ed technologii 125 kHz, jin\u00e9 technologii 13,56 MHz pro \u010dipov\u00e9 karty a n\u011bkter\u00e9 kombinuj\u00ed oboj\u00ed v jednom \u00fadaji. Z tohoto d\u016fvodu m\u016f\u017ee f\u00f3lie blokovat jednu p\u0159\u00edstupovou kartu snadn\u011bji ne\u017e jinou. Obecn\u011b lze \u0159\u00edci, \u017ee pov\u011b\u0159en\u00ed 13,56 MHz jsou f\u00f3li\u00ed naru\u0161ena s v\u011bt\u0161\u00ed pravd\u011bpodobnost\u00ed, zat\u00edmco pov\u011b\u0159en\u00ed 125 kHz jsou \u010dasto tolerantn\u011bj\u0161\u00ed. <\/p>\n\n\n\n

Blokuje hlin\u00edkov\u00e1 f\u00f3lie pasy a ob\u010dansk\u00e9 pr\u016fkazy?<\/strong><\/h3>\n\n\n\n

Mnoho elektronick\u00fdch pas\u016f a n\u011bkter\u00fdch modern\u00edch doklad\u016f toto\u017enosti pou\u017e\u00edv\u00e1 vysokofrekven\u010dn\u00ed RFID na frekvenci 13,56 MHz, tak\u017ee f\u00f3lie m\u016f\u017ee \u010dasto ru\u0161it nebo blokovat \u010dten\u00ed, pokud je oblast \u010dipu zcela uzav\u0159en\u00e1. Stejn\u011b jako u jin\u00fdch vysokofrekven\u010dn\u00edch polo\u017eek je \u010d\u00e1ste\u010dn\u00e9 pokryt\u00ed m\u00e9n\u011b spolehliv\u00e9 ne\u017e pln\u00e9 pokryt\u00ed.<\/p>\n\n\n\n

Je hlin\u00edkov\u00e1 f\u00f3lie spolehliv\u00fdm \u0159e\u0161en\u00edm pro dlouhodob\u00e9 blokov\u00e1n\u00ed RFID?<\/strong><\/h2>\n\n\n\n
\"blokuje<\/figure>\n\n\n\n

Hlin\u00edkov\u00e1 f\u00f3lie m\u016f\u017ee blokovat nebo oslabit RFID, ale nen\u00ed spolehliv\u00fdm dlouhodob\u00fdm \u0159e\u0161en\u00edm. M\u016f\u017ee dob\u0159e fungovat p\u0159i rychl\u00e9m testu nebo v jednor\u00e1zov\u00e9 situaci, zejm\u00e9na kdy\u017e je karta nebo tag zcela uzav\u0159en, ale to nen\u00ed tot\u00e9\u017e jako trval\u00e1 ka\u017edodenn\u00ed ochrana. Mal\u00e9 zm\u011bny v pokryt\u00ed, z\u00e1hybech, mezer\u00e1ch a um\u00edst\u011bn\u00ed mohou zm\u011bnit v\u00fdsledek, tak\u017ee f\u00f3lii je l\u00e9pe ch\u00e1pat jako hrub\u00fd do\u010dasn\u00fd \u0161t\u00edt ne\u017e jako stabiln\u00ed metodu blokov\u00e1n\u00ed.<\/p>\n\n\n\n

Pokud pot\u0159ebujete n\u011bco spolehliv\u011bj\u0161\u00edho, je rozumn\u011bj\u0161\u00ed pou\u017e\u00edt speci\u00e1ln\u00ed materi\u00e1ly pro blokov\u00e1n\u00ed RFID. Tyto v\u00fdrobky jsou navr\u017eeny pro opakovateln\u00fd v\u00fdkon s konkr\u00e9tn\u00edmi frekvencemi RFID, zat\u00edmco b\u011b\u017en\u00e9 f\u00f3lie pro dom\u00e1cnost nikoli.<\/p>\n\n\n\n

Lep\u0161\u00ed alternativy hlin\u00edkov\u00e9 f\u00f3lie pro blokov\u00e1n\u00ed RFID<\/strong><\/h2>\n\n\n\n

Tyto spolehliv\u011bj\u0161\u00ed mo\u017enosti se d\u011bl\u00ed do n\u011bkolika kategori\u00ed.<\/p>\n\n\n\n

Pen\u011b\u017eenky a pouzdra s blokov\u00e1n\u00edm RFID<\/strong><\/h3>\n\n\n\n

Nejb\u011b\u017en\u011bj\u0161\u00ed alternativou pro karty a pasy jsou pen\u011b\u017eenky a pouzdra s blokov\u00e1n\u00edm RFID. Snadn\u011bji se p\u0159en\u00e1\u0161ej\u00ed, sn\u00e1ze se opakovan\u011b pou\u017e\u00edvaj\u00ed a je m\u00e9n\u011b pravd\u011bpodobn\u00e9, \u017ee v nich z\u016fstanou mezery ne\u017e ve slo\u017een\u00e9 f\u00f3lii. Pro ka\u017edodenn\u00ed pou\u017eit\u00ed jsou obvykle nejjednodu\u0161\u0161\u00ed a nej\u010dist\u0161\u00ed variantou.<\/p>\n\n\n\n

St\u00edn\u00edc\u00ed pouzdra na karty a odznaky<\/strong><\/h3>\n\n\n\n

Ochrann\u00e1 pouzdra jsou u\u017eite\u010dn\u00e1 v p\u0159\u00edpadech, kdy je t\u0159eba, aby p\u0159edm\u011bt z\u016fstal p\u0159i skladov\u00e1n\u00ed chr\u00e1n\u011bn, ale p\u0159esto jej bylo mo\u017en\u00e9 snadno vyjmout a znovu pou\u017e\u00edt. Maj\u00ed smysl pro p\u0159\u00edstupov\u00e9 karty, pracovn\u00ed pr\u016fkazy a podobn\u00e1 pov\u011b\u0159en\u00ed, se kter\u00fdmi se \u010dasto manipuluje.<\/p>\n\n\n\n

\u00da\u010delov\u00e9 st\u00ednic\u00ed materi\u00e1ly<\/strong><\/h3>\n\n\n\n

V produktech RFID a technick\u00fdch aplikac\u00edch se m\u00edsto b\u011b\u017en\u00e9 f\u00f3lie \u010dasto pou\u017e\u00edvaj\u00ed specializovan\u011bj\u0161\u00ed st\u00ednic\u00ed materi\u00e1ly. Tyto materi\u00e1ly se vol\u00ed proto, aby poskytovaly stabiln\u011bj\u0161\u00ed v\u00fdsledky, zejm\u00e9na pokud jsou tagy um\u00edst\u011bny v bl\u00edzkosti kovu nebo pou\u017e\u00edv\u00e1ny v n\u00e1ro\u010dn\u011bj\u0161\u00edch prost\u0159ed\u00edch.<\/p>\n\n\n\n

\u010casto kladen\u00e9 ot\u00e1zky<\/strong><\/h2>\n\n\n
\n
\n
\n

Blokuje jedna vrstva hlin\u00edkov\u00e9 f\u00f3lie RFID?<\/strong><\/h3>\n
\n\n

N\u011bkdy, ale ne v\u017edy. V n\u011bkter\u00fdch p\u0159\u00edpadech m\u016f\u017ee k oslaben\u00ed nebo zablokov\u00e1n\u00ed \u010dten\u00ed sta\u010dit jedna vrstva, zejm\u00e9na pokud je karta nebo tag zcela zakryt\u00fd a syst\u00e9m RFID je citliv\u011bj\u0161\u00ed na kov. V\u00fdsledek v\u0161ak st\u00e1le z\u00e1vis\u00ed na frekvenci, konstrukci ant\u00e9ny a na tom, zda existuj\u00ed mezery nebo exponovan\u00e1 m\u00edsta.<\/p>\n\n<\/div>\n<\/div>\n

\n

Blokuje hlin\u00edkov\u00e1 f\u00f3lie NFC?<\/strong><\/h3>\n
\n\n

\u010casto ano. NFC pracuje na frekvenci 13,56 MHz a kov v prost\u0159ed\u00ed m\u011bn\u00ed chov\u00e1n\u00ed ant\u00e9ny a ovliv\u0148uje v\u00fdkon NFC. Karty a tagy NFC obvykle funguj\u00ed mnohem h\u016f\u0159e, pokud jsou pevn\u011b zabaleny ve f\u00f3lii nebo um\u00edst\u011bny p\u0159\u00edmo proti kovu.<\/p>\n\n<\/div>\n<\/div>\n

\n

M\u016f\u017ee f\u00f3lie po\u0161kodit kartu RFID?<\/strong><\/h3>\n
\n\n

Obvykle ne. F\u00f3lie m\u00e1 vliv p\u0159edev\u0161\u00edm na to, zda lze kartu p\u0159e\u010d\u00edst, nikoli na to, zda je \u010dip trvale po\u0161kozen. Ve v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f jde sp\u00ed\u0161e o do\u010dasn\u00e9 zablokov\u00e1n\u00ed nebo oslaben\u00ed sign\u00e1lu ne\u017e o po\u0161kozen\u00ed samotn\u00e9ho \u010dipu RFID.<\/p>\n\n<\/div>\n<\/div>\n

\n

Vyu\u017e\u00edvaj\u00ed pen\u011b\u017eenky blokuj\u00edc\u00ed RFID stejnou z\u00e1kladn\u00ed my\u0161lenku?<\/strong><\/h3>\n
\n\n

Ano. Z\u00e1kladn\u00ed princip je podobn\u00fd. Jak f\u00f3lie, tak v\u00fdrobky blokuj\u00edc\u00ed RFID pou\u017e\u00edvaj\u00ed vodiv\u00e9 st\u00edn\u011bn\u00ed, kter\u00e9 ru\u0161\u00ed r\u00e1diovou komunikaci, kterou \u010dte\u010dka pot\u0159ebuje ke komunikaci s kartou nebo tagem. Rozd\u00edl je v tom, \u017ee \u00fa\u010delov\u00e9 v\u00fdrobky jsou vyrobeny tak, aby to p\u0159i ka\u017edodenn\u00edm pou\u017e\u00edv\u00e1n\u00ed d\u011blaly d\u016fsledn\u011bji.<\/p>\n\n<\/div>\n<\/div>\n

\n

Jak\u00fd druh \u0161t\u00edtku RFID funguje nejl\u00e9pe v bl\u00edzkosti kovu?<\/strong><\/h3>\n
\n\n

Nejl\u00e9pe funguj\u00ed \u0161t\u00edtky ur\u010den\u00e9 pro kovov\u00e9 povrchy. Ve vysokofrekven\u010dn\u00edch a NFC aplikac\u00edch se b\u011b\u017en\u011b pou\u017e\u00edv\u00e1 feritov\u00e9 st\u00edn\u011bn\u00ed, kter\u00e9 sni\u017euje vliv bl\u00edzk\u00e9ho kovu. V aplikac\u00edch UHF jsou tagy na kovu konstruov\u00e1ny speci\u00e1ln\u011b pro tato prost\u0159ed\u00ed, proto\u017ee b\u011b\u017en\u00e9 \u0161t\u00edtky v bl\u00edzkosti kovu \u010dasto ztr\u00e1cej\u00ed v\u00fdkon.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n

Z\u00e1v\u011br<\/strong><\/h2>\n\n\n\n

Pokud chcete jen rychle vyzkou\u0161et, zda lze p\u0159edm\u011bt RFID odst\u00ednit, m\u016f\u017eete si p\u0159ibli\u017en\u011b odpov\u011bd\u011bt pomoc\u00ed hlin\u00edkov\u00e9 f\u00f3lie. Pro ka\u017edodenn\u00ed pou\u017eit\u00ed v\u0161ak nen\u00ed nejlep\u0161\u00edm n\u00e1strojem. V\u00fdrobek vyroben\u00fd pro blokov\u00e1n\u00ed RFID je prakti\u010dt\u011bj\u0161\u00ed, pokud chcete d\u016fslednou ochranu, a \u0161t\u00edtek kompatibiln\u00ed s kovem je lep\u0161\u00ed volbou, pokud \u0161t\u00edtek p\u0159esto mus\u00ed fungovat v bl\u00edzkosti kovu.<\/p>","protected":false},"excerpt":{"rendered":"

Yes, aluminum foil often blocks RFID, especially when it fully covers the card or tag. But it is not a […]<\/p>\n","protected":false},"author":4,"featured_media":15072,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"right-sidebar","site-content-layout":"","ast-site-content-layout":"normal-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-15040","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/custom-rfid-tags.com\/cs\/wp-json\/wp\/v2\/posts\/15040","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/custom-rfid-tags.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/custom-rfid-tags.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/custom-rfid-tags.com\/cs\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/custom-rfid-tags.com\/cs\/wp-json\/wp\/v2\/comments?post=15040"}],"version-history":[{"count":5,"href":"https:\/\/custom-rfid-tags.com\/cs\/wp-json\/wp\/v2\/posts\/15040\/revisions"}],"predecessor-version":[{"id":15078,"href":"https:\/\/custom-rfid-tags.com\/cs\/wp-json\/wp\/v2\/posts\/15040\/revisions\/15078"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/custom-rfid-tags.com\/cs\/wp-json\/wp\/v2\/media\/15072"}],"wp:attachment":[{"href":"https:\/\/custom-rfid-tags.com\/cs\/wp-json\/wp\/v2\/media?parent=15040"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/custom-rfid-tags.com\/cs\/wp-json\/wp\/v2\/categories?post=15040"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/custom-rfid-tags.com\/cs\/wp-json\/wp\/v2\/tags?post=15040"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}