Passive RFIDs are much cheaper than Active RFIDs, that we all now. I have a problem. The cost of Active RFID for the purpose needed will let my business stay in the ground. Why can't a passive RFID reader's signal be strenghten for the range to be longer. I need 10m range or more. Please explain. Thank you.
2007-03-13 14:43:15 · 3 answers · asked by Manie M 2 in Science & Mathematics ➔ Engineering
Passive RFIDs are powered by induction. The reader acts as one side of a very lossy transformer in powering the RFID. As A result the RF signal transmitted by the RFID tag is very weak.
Passive RFIDs simply transmit the coded signal when they receive power. Passive RFIDs are relatively simple and can be manufactured almost entirely by mounting a microchip on a carrier with printed antenna.
Active RFID tags have a small battery or some other power source. They also have to have a receive function, so they can "listen" for the reader and respond. They are more complex and therefore more expensive. The Active rfid has a much greater range since the transmitter, is independently powered.
If you need an a secure auto ID, with more range you could consider a secure barcode and a long range scanner. These use a bar code tag that is only readable with an infrared scanner.
2007-03-21 11:35:30 · answer #1 · answered by Niklaus Pfirsig 6 · 0⤊ 0⤋
Passive RFIDs are meant for short range and low power purposes (a few inches to a few feet) - i.e. Mobil speed pass.
At 10 meter, you need a REALLY powerful transmitter if you want to use Passive RFIDs.
There are inexpensive longer range RFIDs. Think of the electronics used in car door garage openers or wireless door bells.
2007-03-13 15:14:14 · answer #2 · answered by rflatshoe 3 · 0⤊ 0⤋
i think passive RFId purely takes the distinctive enter power and reflects it back. So it has no thank you to boost the size of the reflection. Ask an RFID producer in the event that they might help.
2016-10-18 07:57:16 · answer #3 · answered by Anonymous · 0⤊ 0⤋