Constraints on the Read Distance of a Rfid Tag

RFID Range Overview

What is the maximum read altitude of RFID?

Mostly speaking, RFID tag maximum read distances are as follows:

125 kHz and 134.two kHz
Usually 10 cm (four inches)
It is possible to get read distances over 30cm (1 foot), but these cases need private assessment.

13.56 MHz
Ordinarily under 1 meter (3 feet)
To obtain more than than 1 meter (v anxiety) you demand a reader with output over 1 watt.
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433 MHz
Usually over 800 meters (2624 anxiety)
We've obtained reads over iii kilometer (i.86 miles) away using SkyRFID OEM 433 MHz antennas.
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ii.45GHz
Usually l meters (160 feet)
An emerging standard.
Currently upwardly to 100 meter (325 foot) maximum
Notation: 2.45GHz RFID is non the same every bit WiFi enabled Internet-of-Things devices which as well work on the 2.4GHz band.

How to determine what range yous'll get from RFID?

RFID is a group of technologies, usually identified by the frequency or "wave" they use. The maximum altitude you'll achieve is influenced by;

• The Operating Frequency (or bandwidth if multiple frequencies) of the RFID system
• The RFID Reader and settings of the reader for the organisation
• The Antenna - Type, Gain(dBi),Center Frequency, VSWR, Polarization, Size, IP rating
• Characteristics of the RFID Tag - Size, shape, polarization, tune
• The thickness and cloth the tag is attached to
• The material the RFID Tag is fastened to
• Orientation of the RFID Tag to the reading antenna
• What is used to adhere the tag - adhesive, tape, staple, rivet, screw
• The environment the RFID solution is being used in

...and several other factors. This complexity is why some RFID vendors provide a "Gratis Air" read distance with a 12 dBi antenna gain to give y'all the condolement level of fantabulous RFID reads at "that critical distance". Whatsoever of Deject Collected RFID tag read specifications are based on the RFID tag in actual usage and not in "Gratuitous Air" using our OEM handheld reader equally "Complimentary Air" and "12 dBi proceeds" simply is not realistic of most RFID environments.  In real life implementations SkyRFID considers all of the factors above plus many more to provide a turnkey solution configured to your own unique needs.

SkyRFID examination our equipment at the factory and at our North American offices using the most common arrangements nosotros see for each invidual use case. The details nosotros include on our spec sheets is what you'll get in normal use.

Frequency Specific Details

125 kHz. and 134.3 kHz. Low Frequency (LF) Passive RFID Tags

Read altitude of 30 cm (1 foot) or less - usually 10 cm (4 inches) unless you are using a very big tag which tin have a read distance of upward to 2 meters when fastened to metallic. SkyRFID tin can provide several different LF 134.two tags which produce read distances of 1 - two meters in industrial environments. We as well have special readers that allow for a 1 - 2 meter read altitude using standard size tags. There are no limits with SkyRFID!

13.56 MHz. Loftier Frequency (HF) Passive RFID Tags

Maximum read distance of ane.five meters (iv human foot eleven inches) - usually under one meter (3 anxiety) and yous tin apply a single or multi port reader plus custom antennas to extend the read range to longer tag read distances or a wider RFID read zone. To obtain more than 1 meter you need a reader with more than 1 watt RFID output power. SkyRFID can supply 13.56 readers with RF power outputs up to 10 watts for multiple antenna connections and over ane meter tag read distances.

860 ~ 960 MHz. Ultra Loftier Frequency (UHF) Passive RFID Tags

Minimum read distance of over ane meter or iii feet. Gen2 tags can have a read range of over 16 meters or 52 feet when using the full iv Watt EIRP legally allowed on the readers past FCC and other global regulators (For your local power regulations see our RFID Education page). Gen 2 tags can be EPCglobal multi-frequency, 860 MHz. European Union, or 902 MHz. FCC depending on the tags function and other capabilities. Gen two semi-passive (semi-active) tags are bombardment assisted and have a read range of upward to 50 meters or about 162 anxiety. Nosotros have both passive and the emerging semi-active readers and tags available for those companies that need to be on the leading edge or just need the range of the Gen 2 Semi-agile technology.

RTLS - Real Time Location Systems

Usually LF and SHF. Now you can have a UHF RTLS that is extremely accurate and tin easily command 250,000 sq feet on a single switch. Use the Contact Usfor more information.

433 MHz. Ultra High Frequency (UHF) Active RFID Tags

Fully adjustable read range from 30cm (1 foot) to over 3 kilometer (one.86 miles) using our special sensitive high proceeds antenna solutions. SkyRFID offers a comprehensive line of 433 MHz stock-still and portable readers, tags (ATEX Certified), antennas and accessories for a multitude of Industrial, Marine, Healthcare, Mining, Vehicle, Personnel, and other tracking and locating applications.

2.45 GHz. Super High Frequency (SHF) Active RFID Tags

Up to 100 meter read range (325 anxiety) There are several different modulations for 2.45 GHz. and yous tin also have real time location information from these active tags.

Constraints on the Read Distance of a Rfid Tag

Source: https://skyrfid.com/RFID_Range.php#:~:text=Low%20Frequency%20(LF)%20Passive%20RFID,meters%20when%20attached%20to%20metal.

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