Radio Frequency Identification (RFID)-a Antenna Technology hmante chu engte nge ni?

Radio Frequency Identification (RFID)-a Antenna Technology hmante chu engte nge ni?

 

Kum tam tak chhung chu failure case za tam tak kan buaipui tawh a, sawm zinga 9 vel chu chip defect aiin antenna problem a ni zawk. Vanduaithlak takin customer tam zawk chuan kar tam tak chhung chip datasheet tehkhin nan an hmang a, antenna design erawh ni khat emaw ni hnih emaw chhungin a tawp ta a ni.

RFID hian frequency band pali a huam a ni. Antenna physics hi an danglam em em a, 125 kHz coil leh 900 MHz dipole tehkhin chu transformer leh TV broadcast tower tehkhin ang mai a ni.

 

 

Frequency hniam leh frequency sang-125 kHz leh 13.56 MHz-ah chuan tag hi reader antenna near field-ah a thu a. Energy hi coil pahnih inkara magnetic flux linkage hmanga transfer a ni a, transformer hnathawh dan nen a inang hle. Chuvangin "antenna" kan ti lo tlangpui-"coil" emaw "inductor" emaw hi a dik zawk. LF coil te hian ferrite rod vel ah copper wire an thli a. Ferrite hi ceramic a ni a, magnetic permeability sang tak a nei a, flux chu volume tlem zawkah a concentrate a ni. 13.56 MHz atan chuan coil tam zawk hi PCB emaw PET film-a etched flat spirals an ni-kan factory-ah chuan standard chu 0.07mm copper foil thickness a ni.

Band pahnih tan practical limit chu ideal condition hnuaiah read range meter khat a ni mai thei. A tlangpuiin a tlem zawk.

 

860-960 MHz i thlen chuan game chu a danglam vek tawh. Wavelength chu a tlahniam tawk a, antenna lian tham tak chuan electromagnetic wave chu far field-ah a radiate thei tak zet a ni. Dipoles, meander-lines, patches-real antenna structures radiation pattern leh impedance characteristic pawimawh tak tak te.

 

915 MHz-a half-wave dipole chu tip to tip-ah centimetre 16 vel a tlan a ni. Meander-line design te chuan chu sei zawng chu label tenau zawka fit turin hma leh hnung lamah an fold thin. Bandwidth hi compactness atan i trade thin. Lu na lian zawk chu impedance matching a ni. UHF RFID chips hian complex impedance an nei a, real part chu 20Ω vel a ni a, capacitive reactance chu chip model a zirin -150 atanga -220Ω inkar a ni tlangpui. Antenna hian conjugate chu a pe tur a ni. Tunah chuan simulation software hian hei hi a handle tawh a mahse manufacturing tolerance zawng zawngah match rintlak tak neih theih nan iteration a ngai a ni.

 

Metal surface-a tag i stick meuh chuan performance a tlahniam nasa hle-hei hi UHF project-a thil awm tam ber pakhat a ni mai thei. Ground plane nei patch antenna te hian hei hi hna an thawk a mahse cost leh thickness an belhchhah thung.

 

2.45 GHz leh a chunglam microwave band hi RFID atan a awm a mahse toll collection leh real-time location system pawn lama hmanna tlemte hmuh a ni.

Manufacturing consistency hian working deployment leh field failure a thliar hrang a ni. Coil winding tension hian inductance a nghawng nasa hle. Etching chemistry hian trace geometry a nghawng a ni. Screen printing variable hian sheet resistance a nghawng a ni. Chip bonding quality hian hun rei tak- dam khawchhuahna a nghawng a ni. Heng zawng zawng hi datasheet-ah a lang lo.

Frequency i thlan dawnin physics chu problem nen match rawh. LF hian tissue chhungah a lut a, metal-animal identification runs on it bulah hna a thawk a, a chhan tha tak a awm. HF hian NFC leh pawisa pekna dilna a buaipui thin. UHF hian inventory leh logistics atan range leh speed a pe chhuak a, mahse environment factors ngaihven a phut thung.

 

 

Datasheet range specification chuan lab condition tha ber-tag hmaa reader, free space, interference awm lo anga ngaih a ni. Project planning tak tak atan chuan chu number chu a chanvea tihtlem atanga tan la, a chungah 20% margin dang dah leh rawh. A chunga kan sawi zawng zawng hi kum sawm leh pariat kalta chhunga Jingzhou-a kan tag leh reader production kalpui dan kan zir chhuah atanga lo chhuak a ni-a bik takin sawiho i duh chuan zalen takin min rawn pan thei ang.