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hf rfid transponder, has to adhere to iso 14443 standard
hi everyonei am designing the analog front end portion for 13.56 mhz tag on virtuoso cadence. it has to adhere to iso 14443 standard. any form of help will be highly appreciated.thanks a lot....
Analog Circuit Design :: 19 Aug 2009 10:48 :: Nzima :: Replies: 0 :: Views: 147
rfid project
i am building an integrated rfid system capable of quickly identifying objects by their rfid tags. the system will be able to read and write tags. read data will be store in a database through a middleware.i intend this system to be installed in libr...
Microcontrollers :: 09 Aug 2009 1:16 :: doraemon :: Replies: 10 :: Views: 1773
help me budget. in house design or outsource?
re you are all very busy) but im a lone engineer in thailand on this project without anyone else to talk to. ive been assigned a project requiring 2 distinct rf components and pcb antennas. i need an rfid chip at 13.56 mhz and an 802.15.4 (or equival...
RF, Microwave, Antennas and Optics :: 06 Aug 2009 19:06 :: micky74 :: Replies: 1 :: Views: 282
measurring rfid system - connecting tag to signal analyzer
hello everyone,i am doing my work training and my task is to learn how to use a newly bought exa signal analyzer to carryout some measurement on rfid system. but the problem is i dont know how to connect the tag and reader system to the signal analyz...
Digital communication :: 03 Jul 2009 7:35 :: FvM :: Replies: 5 :: Views: 331
what is the cutoff frequency of the filter for rfid reader?
hi,everyone,i want to design a filter for rfid reader. but i want to know what the cutoff frequency usually should be. and some paper say the bandwidth of the filter could be tuned. does the the filter of the reader have no fixed cutoff frequency?why...
RF, Microwave, Antennas and Optics :: 02 Jul 2009 7:12 :: FvM :: Replies: 1 :: Views: 162
rf switch in 13.56mhz
13.56m transmitter,but the effect is very bad,the switch module is macom masw-007813 and some voltage control circuit,datasheet claims operating range is dc-3g,i previously used it very well in 915m rfid reader,but now despair.in theory,input power ...
RF, Microwave, Antennas and Optics :: 13 Jun 2009 10:19 :: FvM :: Replies: 9 :: Views: 534
rfid signal strength measurement
colleagues,how difficult is it to measure signal strength of an rfid tag with a given code in presence of other tags? if there an existing signal structure where it would be easy to do? i would appreciate any references on this subject.thank you,- ...
RF, Microwave, Antennas and Optics :: 29 May 2009 1:55 :: kender :: Replies: 4 :: Views: 627
how can i design an 13.56 rfid antenna with cst
o)my project is design and implement an antenna for work in 13.56 mhz frequency.i see name of cst on many article on the web and i have very low knowledge about cst and its facilities about designing rfid antenna. can anyone help me about features an...
RF, Microwave, Antennas and Optics :: 25 May 2009 12:25 :: sni63 :: Replies: 3 :: Views: 468
ADS
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low-cost 13.56 mhz rfid reader features power supply by usb
daily rfid has recently launched a 13.56 mhz rfid reader -02 designed as a low cost plug-and-play device for industrial and outdoor environments, especially in process of writing data into passive rfid tags. daily plans to market the 13.56mhz reader ...
Business Special Interest Group :: 14 May 2009 8:05 :: RFID_DAILY :: Replies: 0 :: Views: 387
high-school student want to design a simple rfid antenna
good morning everyone, i have a project which is so important for me where i need to built a simple rfid antenna, i dont know how to start, which sources could help? the frequency should be 13.56 mhz>> how l is should be???i am really lost in this a...
RF, Microwave, Antennas and Optics :: 17 Apr 2009 16:17 :: salehmag :: Replies: 7 :: Views: 822
passive rfid and its power, cadence simulation
hi. i am designing a wireless sensor which is very similar with 13.56 mhz passive rfid which must need a charge pump that harvests power from rf signal in order to feed the rest of components in a chip. my question is what kind of power (or voltage) ...
RF, Microwave, Antennas and Optics :: 10 Apr 2009 17:10 :: florescent :: Replies: 0 :: Views: 300
[request] rfid antenna design tips ?
hello all,im not expert in rfid antenna design, especially magnetic coupling. but thats my today (and for the rest of the month) duty ...i have a few books, about rfid theory (physics, economy, and so on...) but not so many information about layout d...
Electromagnetic Design and Simulation :: 03 Feb 2009 8:43 :: chromatik :: Replies: 4 :: Views: 1308
gamma matching for rfid antenna.
i am currently doing a project on rfid antenna design. recently, i have been looking at doing gamma matching for my copper tape antenna. after being stuck at it for one week, i am still unable to get it right. therefore, i would like to seek advice o...
RF, Microwave, Antennas and Optics :: 17 Dec 2008 12:50 :: applemilk :: Replies: 1 :: Views: 504
rfid issue
hii am fully aware that rfid transmit high speed data but for my cast, i simply want to use it for on and off. i have looked at catalogues and most of them offer complex system with usb/rs232 connection. i simply need a simple rfid detector that de...
Electronic Elementary Questions :: 16 Oct 2008 9:02 :: sohailkhanonline :: Replies: 2 :: Views: 246
rfid antenna
hi, everybodyid like to simulate rfid antenna at 13.65 mhz by hfss. how do i setup my airbox? if i still follow the rule that the height of airbox is approximately quater-wavelength, it is huge. do you have any suggestions? thank you!...
RF, Microwave, Antennas and Optics :: 15 Oct 2008 2:12 :: sun&moon :: Replies: 1 :: Views: 414
parameter setting in cst studio
hi,i trying to design a rfid antenna for 13,56mhz in cst microwave studio.i designed several antenas as a (http://www.cst.com/content/applications/article/rfid+reader-coil%2c+13.56+mhz)but im not sure if generated result(s-parametr,smith chart,polar ...
RF, Microwave, Antennas and Optics :: 30 Sep 2008 17:04 :: simi.l :: Replies: 2 :: Views: 387
impact of q factor in spiral antenna design for rfid
hi everyone,i was surprised to find a forum like this where there is some activities. i try to expose my problem.im currently doing my diploma work. i must create a complete rfid system (reader and tag) at 13.56 mhz. my question concern the antennas ...
RF, Microwave, Antennas and Optics :: 17 Sep 2008 9:15 :: dark0 :: Replies: 0 :: Views: 309
soic & rfid reader chip
hi,this is my first mail in this group. i am trying to impleament a rfid reader/writer. now i have choosen clrc632 reader ic from mifare. the problem is i have only done developing in a breadboard/protoborad but from nxp i found this chip in soic pac...
PC Programming and Interfacing :: 27 Aug 2008 17:55 :: spagoti13 :: Replies: 0 :: Views: 216
rfid reader ic
hi i am looking for low cost low frequency rfid reader ic.can anyone suggest me the ic thanks...
Microcontrollers :: 17 Aug 2008 16:18 :: xcarriber :: Replies: 56 :: Views: 24597
rfid 13.56mhz power amp design
hi all. i wish i had found this forum a little sooner. im trying to design a rf power amplifier to work at 13.56mhz. im trying to amplify the transmit power from a texas instrument trf7960 reader ic. i want an output power of 8 watts to power up an a...
RF, Microwave, Antennas and Optics :: 26 Jul 2008 22:52 :: FvM :: Replies: 15 :: Views: 1560
high power .......??
dear all i need your help & tips in the following project , i need to make a 14 mhz osc. with output power more than 500watt and to be able to guide such rf in a certain direction ... how can i start ?? and how to deliver such huge power ?? thanksbye...
RF, Microwave, Antennas and Optics :: 18 Jul 2008 8:58 :: RF-OM :: Replies: 11 :: Views: 888
s parameters & simulator
hi all,i am designing a loop antenna (for magnetic field) ,i am measuring its performance by measuring coupling s21 with a second antenna of same type kept at a distance. i want to know whether my approch is right.my doubt is s parameter calculations...
RF, Microwave, Antennas and Optics :: 05 Jul 2008 0:14 :: RF-OM :: Replies: 12 :: Views: 726
13.56mhz pa for rfid reader reference design.
i found an application note from microchip about a 13.56mhz rfid reader reference design. i attached the schematic here. i have some questions:...for the power amplifier, how to design the matching network? how to decide the component value?in this p...
RF, Microwave, Antennas and Optics :: 04 Jul 2008 11:03 :: ADS_RFMW :: Replies: 16 :: Views: 4261
ask modulator for 13.56 mhz rfid tag
hi friendscan any one plz tell me how to simulate, the ask modulator circuit used in the 13.56 mhz rfid taghttp://images.elektroda.net/96_1209900078_thumb.jpg...
Electronic Elementary Questions :: 25 May 2008 20:20 :: Slayerza :: Replies: 3 :: Views: 219
positionning system using rfid
hello,i am woking on my project which is a positionning system using rfid tags at 13.56 mhzmy task now is to simulate a system having 1 rfid transponder and 4 rfid readers and to get the induced voltage in each of the readers. and depending on the vo...
Electromagnetic Design and Simulation :: 18 Apr 2008 13:37 :: andrewmorcos :: Replies: 0 :: Views: 141
rfid tag problem
hello,when i simulate an rfid tag on cst i get a negative imaginary impedance at the 13.56 mhz frequency.can anyone explain this to me please?...
Electromagnetic Design and Simulation :: 17 Apr 2008 11:40 :: andrewmorcos :: Replies: 2 :: Views: 174
rfid 13.56
can anybody give me dimensions of a passive 13.56 rfid tag?thank you...
Electromagnetic Design and Simulation :: 15 Apr 2008 10:34 :: rajeshkumar123 :: Replies: 1 :: Views: 135
rfid on cst
hello,i am having my bachelor thesis on rfid. i need to simulate a rfid 13.56 tag using cst microwave studio.can anyone help me in that?attached is my simulation trial, but unfortenately it doesnt give any good results.so if you have any idea why is ...
Electromagnetic Design and Simulation :: 14 Apr 2008 16:49 :: andrewmorcos :: Replies: 0 :: Views: 225
simulating an rfid tag
hi,i was wondering if anyone can suggest a good em simulator that is suitable for rfid tags (planar spiral antenna). im looking at 13.56mhz for the chosen frequency. can anyone point me in the right direction because there are so many packages out t...
Electromagnetic Design and Simulation :: 10 Apr 2008 16:49 :: andrewmorcos :: Replies: 29 :: Views: 3525
what is the rfid?
what is the rfid?what is a simple example?how to push it into a cheap productions?tia...
RF, Microwave, Antennas and Optics :: 03 Apr 2008 6:45 :: kokei74 :: Replies: 20 :: Views: 1533
13.56 rfid tag
i am designing the analog front end portion for 13.56 mhz tag on virtuoso cadence just wondering if anyone has the circuits needed to design this tag such as the rectifier,regulator, demodulator, modulator circuits..... i would really apperciate it ....
ASIC Design Methodologies & Tools (Digital) :: 03 Mar 2008 15:04 :: ptalwar :: Replies: 3 :: Views: 238
re: interference on nfc antenna coil
hi, i read in data from a card wirelessly using an rfid coil but when i introduce a magnetic field near the antenna coil, the data is corrupted. how would a filter be performed digitally to get rid of the low frequency magnetic field? the magnetic h...
Digital Signal Processing :: 19 Feb 2008 22:48 :: kelvchan :: Replies: 4 :: Views: 806
13.56mhz rfid pcb antenna testing picture/instruction
tenna with network analyzer.as you know,the celluar antenna can connect the network analyzer test cable with coax cable which welds on the pcb ,but im not sure this method could apply to the 13.56mhz rfid ante......
RF, Microwave, Antennas and Optics :: 18 Feb 2008 3:25 :: zfl :: Replies: 2 :: Views: 399
rfid [help]
hii want to know about rfid. pls hlp me. what is its fundamentals? which frequency bands are used for it? which books are about it?...
RF, Microwave, Antennas and Optics :: 01 Feb 2008 14:01 :: zirtapoz :: Replies: 3 :: Views: 212
build loop pcb antenna for em4095 rfid reader
hi,im building rfid reader with em4095 and i want to implement loop pcb antenna. i was wondering if you can give me some guidelines for calculating the copper thickness, track width and width constraint and also number of loops and antenna dimensions...
RF, Microwave, Antennas and Optics :: 27 Jul 2007 11:12 :: mdusan :: Replies: 8 :: Views: 2001
long range rfid - 125 khz
hi i looking for project , ideas for long range passive rfid 125 khz - long range = about 100 cm.i want to read word tag unique with manchester encoding.any ideas ?i found some information on internet - i buy oem reader but all time range is too smal...
RF, Microwave, Antennas and Optics :: 03 Jun 2007 6:45 :: Usmanaih :: Replies: 18 :: Views: 2370
rfid question
i will doing my final year project regarding to rfid in location tracking system. does anybody know about which type of rfid reader support this type of function, which mean it can show the actual location of an object that tagged with rfid tag in a ...
RF, Microwave, Antennas and Optics :: 29 Apr 2007 14:14 :: Smart :: Replies: 5 :: Views: 522
13.56 mhz rfid reader
dear all, i want to make a reader for rfid that use 13,56 mhz. can anyone give me some advice how to build this.thank you...
RF, Microwave, Antennas and Optics :: 29 Apr 2007 4:19 :: bobo1 :: Replies: 6 :: Views: 573
looking for help building rfid units
ive trying to get anyone to help me with this and am not running into much luck. take a look and if anyone can help would be great. im looking to pay someone to do this. description: design specs for rfid / gps units these units are for a commercial ...
Professional Hardware and Electronics Design :: 01 Mar 2007 14:31 :: concretehead2 :: Replies: 1 :: Views: 195
what is the difference between 13.56 mhz and 125khz rfid tag
hi,what is the difference between 13.56 mhz and 125khz rfid tag?thanks...
RF, Microwave, Antennas and Optics :: 27 Feb 2007 9:30 :: msadek_eng :: Replies: 11 :: Views: 948
13.56 reader module
hai, i have to design 13.56 mhz reader . i have sb2230 module but i dont know how to interface it with microcontroller to make a complete rfid reader. can anyone guide me to finish my project.thanks...
RF, Microwave, Antennas and Optics :: 13 Feb 2007 11:18 :: lathaharshini :: Replies: 0 :: Views: 177
rfid
what exactly is an rfid?...
Electronic Elementary Questions :: 04 Feb 2007 10:33 :: ittefaq11 :: Replies: 8 :: Views: 414
range of rfid
i want to know on what factor does the range of rfid depend? also i want to start the project on rfid and i need the maximum range so can anyone tell me the maximum achievable range for active and passive tags with detailed information......
RF, Microwave, Antennas and Optics :: 15 Jan 2007 2:12 :: blapcb :: Replies: 7 :: Views: 837
rfid based attendance register
hai alli would like to design an rfid based attendance registerwhere i need a read range of 1-1.5 meterthe tags caould be active or passivethe main hurdle i think is antenna designi would like to get some inputs from the peoplewho had experiance on t...
Microcontrollers :: 05 Dec 2006 3:47 :: artem :: Replies: 5 :: Views: 414
rfid aquisition speed
hi all,i now have a 13.56 mhz system and am looking to the mifare range of tags.i wonder what is the fastest way to read a tag by the reader (and its bus, in my case a usb bus)the bus is fast, there i expect no problem.i need to read a few bytes from...
RF, Microwave, Antennas and Optics :: 30 Aug 2006 17:52 :: multanova51 :: Replies: 0 :: Views: 153
125khz, passive rfid communication distance question??
hi, everybody i utilized rfid reader type: u2270b(atmel), the antenna is 1.35mh. untilized rfid tag type: u3280m(atmel), l≈1.024 mh, c≈1.58nf (f=125khz) i chose u3280m (tag), purpose when tag receives energy and data from reader, ...
RF, Microwave, Antennas and Optics :: 04 Jul 2006 10:40 :: hjacky712 :: Replies: 0 :: Views: 351
crystal...!!
i m working on a rfid reader...which works in 13.56 mhz.....i cant find a crystal of tat frequency....... is there any possibility of working if i use 14mhz instead or??? can i design one of tat freq ??please help...
RF, Microwave, Antennas and Optics :: 10 Jun 2006 1:45 :: biff44 :: Replies: 2 :: Views: 291
rfid reader amplifier
hi! ive been looking for a amplifier/power amplifer for an rfid reader. the operating frequency of the reader is 13.56mhz and the modulation is ampitude shift keying (ask). ive been researching for almost a month and i cant find the appropriate ampli...
RF, Microwave, Antennas and Optics :: 14 May 2006 22:30 :: harkonnen :: Replies: 6 :: Views: 978
rfid reader antenna
hello,a 13.56mhz rfid system utilises inductive coupling (transformer). therefore, is it right to say that the current in the reader antenna determines the voltage available to the chip on the rfid tag?is the current in the reader antenna important ...
RF, Microwave, Antennas and Optics :: 11 May 2006 10:06 :: PaulHolland :: Replies: 11 :: Views: 966
measuring rfid tag voltages (dc)
hi folks,i am planning on performing tests on an rfid passive tag antenna (spiral coil), without a tag ic connected. i will have the tag at various distances from an rfid reader antenna.how can i reliably measure the dc voltage induced across the tag...
RF, Microwave, Antennas and Optics :: 26 Apr 2006 9:39 :: Catalyst :: Replies: 25 :: Views: 1245
whats hot about rfid?
national id card? biometrics ?any thoughts , are appreciated.thanks,...
Digital communication :: 25 Apr 2006 7:21 :: sinu_gowde :: Replies: 5 :: Views: 666
rfid tag reader
hi,so far i have been using the htrc1100 tag reader chip from philips for 125khz transponders.now i have to design a new board but the power supply has to be 3.3volts.do you know of any similar ic that works at 3.3 volts?thanks in advance.alba800...
Professional Hardware and Electronics Design :: 19 Feb 2006 12:41 :: Smart :: Replies: 1 :: Views: 573
sonet rfid antenna simulation questions
hi guys i am first day user of em simulation so please dont be angree for stupid questions .)well i need to design hf rfid antenna and it was possible to simulate spiral rectangular structure. but netlist got from spice does show different model com...
Electromagnetic Design and Simulation :: 21 Jan 2006 22:57 :: rautio :: Replies: 4 :: Views: 468
pic rfid base station
hii am look for micro chip rfid base station reader freq of 125khz and 13.56 mhzcan any suggest me.regardskumar...
Microcontrollers :: 02 Jun 2005 6:57 :: snoopy :: Replies: 1 :: Views: 516
rfid reader
who know about rfid reader ic and how i can buy it...
RF, Microwave, Antennas and Optics :: 25 Mar 2005 8:47 :: xmans :: Replies: 6 :: Views: 555
rfid components ?
thanks forum for helping me out by replying to my past queries on rfid.now, i am on practically implementing my 13.56 mhz rfid system, i am having problem in geting components like rfid reader ic or sample tags.companies usually sell their products i...
RF, Microwave, Antennas and Optics :: 07 Mar 2005 20:26 :: truebs :: Replies: 0 :: Views: 159
rfid reader
hi,can anybody tell me what does a 74hc4060 (14 stage binary counter), 74hct04hex inverters and a class ab do in a rfid reader circuit?? why do we divide the frequency with 32? e.g 4mhz/32=125khz..thanx...
Hobby Circuits and Small Projects Problems :: 03 Feb 2005 15:59 :: artem :: Replies: 1 :: Views: 390
rfid beginner help?
hai i would like to try my hands on a simple rfid system,something like a attendence system. little confused with different frequencies and different manufactures. please guide me with a possible start up ckt or links .microchip is no longer prov...
Microcontrollers :: 15 Jan 2005 14:45 :: 7rots51 :: Replies: 3 :: Views: 621
antenna design for small rfid tag needed !
greetings,im writing my msc thesis in microelectronics and need to design chip for remote measurements. such chip would communicate wit base station just like rfid tags do (13,56 mhz), but communication range is small (1-2 cm) and the size of the chi...
RF, Microwave, Antennas and Optics :: 23 Dec 2004 23:34 :: zorro :: Replies: 5 :: Views: 474
tuning antenna with swr meter
ly one input. however, the antenna manual ive been reading says that i need to tune the antenna using a swr meter with 2 inputs - one for the antenna and the other for the transmitter (in my case, an rfid reader). does that mean that using the swr me...
RF, Microwave, Antennas and Optics :: 25 Nov 2004 10:37 :: vfone :: Replies: 2 :: Views: 342
suggestions for rf senior design project
does anyone have any good ideas for an rf senior design project. i was thinking about designing a wireless cell phone battery charger. i have read numerous articles about tesla and his wireless power transfer ideas. is this project even feasible? ...
RF, Microwave, Antennas and Optics :: 19 Nov 2004 23:00 :: flatulent :: Replies: 5 :: Views: 990
tuning antenna using spectrum analyzer
im trying to tune my antenna (to operate at 13.56 mhz) for an rfid application. my school has a network analyzer. i was wondering:1. if i can use a network analyzer to tune my antenna?2. how would i got about doing so?thanks,drew...
RF, Microwave, Antennas and Optics :: 15 Nov 2004 23:01 :: VSWR :: Replies: 2 :: Views: 438
pcb antenna
hi !i need info abaout pcb low power antennas. like those in car alarm systems. i would like to know it its some tool for the simulation of these antennas. thanks...
RF, Microwave, Antennas and Optics :: 22 Jun 2004 10:03 :: jupiter :: Replies: 12 :: Views: 3188
i need help on the issue of asynchrnous serial data transfer
asynchronous serial data transferring circuits. a simple, maybe, circuit with low power to detect asynchronous serial data input for a control logic is needed in a low power communication system like rfid. where can i find examples or introductions?...
Microcontrollers :: 19 Nov 2003 18:23 :: GeorgeM :: Replies: 1 :: Views: 254
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