new babe to RFID design want to ask some question
I am a software engineer and I know nothing about hardware
design.... Recently I am asked to collect some information about the components of RFID reader that can read ISO-18000-6 (Type A) tag. The tag works in the UHF band (860-930 MHz). I have some question but I don't have any friend that have RFID experience. I would really appreciate if you could kindly answer the questions below..... 1) The operational principle of this kind of tag is "backscatter coupling". However, I am not sure how the reader distinguish the forward signal and the backscattered signal, which of the same frequency. I read some information from internet and someone mentioned about the "directional coupler". Is directional coupler really used in a typical UHF RFID reader? If so, could you kindly recommend a brand and the model number of directional coupler that can be used in RFID reader? 2) The reader is supposed to be used in a cashier of shop. The range of distance of the reader to the tag is about 30cm. Do you have some typical power values that the reader need to send and the power of the backscattered signal? I need this kind of figure because I was ask to choose the transceiver IC and I wonder if the power is enough. Do you have any recommendation of transceiver IC? 3) About the antenna. I found some paper mention about 4 phased array, which is good for sending RF signal in one direction. Have anyone used it before? If yes, where can I found it? Any brand name or model number recommend? 4) Do you have any reference design / paper on the design of RFID reader? Thanks in advance. NOSPAM |
new babe to RFID design want to ask some question
first, as a software engineer you need to learn how to use google and other
search engines. all the details you are asking about are out there... in excruciating detail in some cases. second, if you are doing software why don't you just go buy the hardware from someone who has already done all the design and testing and just use their system? or get a hardware engineer to do what they do best and figure out what your system requirements need? there are probably dozens of off the shelf rfid manufacturers out there, just pick the range and type of data you need and you should be able to find one that will give you just what you want. "nospam" wrote in message oups.com... I am a software engineer and I know nothing about hardware design.... Recently I am asked to collect some information about the components of RFID reader that can read ISO-18000-6 (Type A) tag. The tag works in the UHF band (860-930 MHz). I have some question but I don't have any friend that have RFID experience. I would really appreciate if you could kindly answer the questions below..... 1) The operational principle of this kind of tag is "backscatter coupling". However, I am not sure how the reader distinguish the forward signal and the backscattered signal, which of the same frequency. I read some information from internet and someone mentioned about the "directional coupler". Is directional coupler really used in a typical UHF RFID reader? If so, could you kindly recommend a brand and the model number of directional coupler that can be used in RFID reader? 2) The reader is supposed to be used in a cashier of shop. The range of distance of the reader to the tag is about 30cm. Do you have some typical power values that the reader need to send and the power of the backscattered signal? I need this kind of figure because I was ask to choose the transceiver IC and I wonder if the power is enough. Do you have any recommendation of transceiver IC? 3) About the antenna. I found some paper mention about 4 phased array, which is good for sending RF signal in one direction. Have anyone used it before? If yes, where can I found it? Any brand name or model number recommend? 4) Do you have any reference design / paper on the design of RFID reader? Thanks in advance. NOSPAM |
new babe to RFID design want to ask some question
Just wondering ..
Dave wrote: why don't you just go buy the hardware from someone who has already done all the design and testing and just use their system? or get a hardware engineer to do what they do best and figure out what your system requirements need? there are probably dozens of off the shelf rfid manufacturers out there, just pick the range and type of data you need and you should be able to find one that will give you just what you want. What RF hash level at the used frequency or frequencies can trash the operational effectiveness of the currently 'of interest' RFID devices and systems? A watt or two from how many feet away? How many more watts from how much further away could ruin a perceived 'secure' technology? Inquiring mind wants to know. W5WQN -- -- Sleep well; OS2's still awake! ;) Mike Luther |
new babe to RFID design want to ask some question
"nospam" wrote in message
oups.com... I am a software engineer and I know nothing about hardware design.... "Dave" wrote in message ... first, as a software engineer you need to learn how to use google and other search engines. all the details you are asking about are out there... in excruciating detail in some cases. second, if you are doing software why don't you just go buy the hardware from someone who has already done all the design and testing and just use their system? or get a hardware engineer to do what they do best and figure out what your system requirements need? there are probably dozens of off the shelf rfid manufacturers out there, just pick the range and type of data you need and you should be able to find one that will give you just what you want. Or look at the RFID Journal http://www.rfidjournal.com/article/a...view/1951/1/1/ gb |
All times are GMT +1. The time now is 11:48 AM. |
Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
RadioBanter.com