RFID Technology 
Passive RFID
Passive RFID
Passive RFID
 Every RFID technology which does not involve a battery or any other power-source on the transponders, is considered "Passive RFID".Passive transponders receive their power from the interrogator ("Reader"), which utilizes an antenna in order to channel the energy into radio waves. The transponders can accumulate the energy required to tranmist their response, which is then received back by the interrogator.
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Elements of passive RFID
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Interrogator - Also refered to as "reader", the interrogator handles the communication with transponders via radio-waves. It is usually connected to a PC or Controller for local applications, or to remote servers via wired/wireless networks. readers differ from each other by frequency (technology), power (from low to high), connectivity options, and housing. There are 3 main types of readers which can be distinguished:
> Desktop reader - Low power readers in a designed housing and serial/USB connectivity
> Industrial reader - medium to high power reades with serial/LAN connectivity and robust housing
> Mobile readers - stand-alone devices with batteries and WLAN/GPRS connectivity.
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Antenna - The antenna is connected to the interrogator, and is used to both broadcasting the its transmissions as well as receiving the transponder's messages. Antenna size and shape affects the effective reading range, while there are different antenna designed to the various frequencies (technologies).
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Transponder- Also referred to as "tag", the transponders contain a small antenna (from copper or some kind of an inductive ink) and a microchip. Each transponder is pre-programmed with a unique tag-ID. Transponders are available in various formats (labels, discs, cylinders), size and housing options, whic obviously reflects a wide spectrum of prices. |
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Passive RFID Frequencies
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Low-frequency (LF) - RFID Technology which employs the frequency range of 125Khz - 134Khz. Due to its low frequency, this technology shows the highest robustnes to metal and liquid environments, and so it is mostly common to find it in industrial applications and animal tagging.
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High-Frequency (HF) - The HF technology employs the frequency of 13.56MHz, and has nearly universal regulatory characteristics across all geographies. With its price-performances, the HF dominated the RFID world for several years and can be found in various applications, from access-control to item level tagging.
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Ultra High Frequency (UHF) - Utilizing the 860-950Mhz spectrum (depends in the specific region, for Israel it is 915-917Mhz) the UHF technology enables read ranges of up to 10m, making it perfect for logistics and supply chain usage. | |
LogiTag Systems is highly experienced in providing tailored made solutions to its customers based on all types of RFID technologies, including hybrid solutions involving more than 1 type of frequency.