Advantages of Active RFID

GuardRFID provides RTLS solutions using active RFID technology because it is one of the most stable methods of providing real-time location information.

GuardRFID offers active RFID using 433 MHz radio frequency and 2.4GHz Wi-Fi frequency. 433MHz is an unlicensed wireless radio frequency band that companies use specifically for RTLS. While 2.4GHz Wi-Fi (or 802.11 protocol) was designed for local network communication (e.g. for intranet or internet connections) and RTLS is an add-on functionality.

An advantage of operating at 433MHz compared to 2.4GHz is the range and performance in the presence of absorbing material such as walls, metal objects and human bodies. 433MHz tags work better in situations where tags are attached directly to people. Whereas the advantage of Wi-Fi is the cost savings during the installation phase by leveraging existing network infrastructure to provide location data.

“Technologies such as Wi-Fi are used for proximity tracking where the use case does not require granularity. Frequencies such as 13.56 MHz, passive UHF, BLE or UWB are often used for zonal tracking when they are integrated into ID tags, wristbands or security badges that detect where employees are at a specific time and date. Other frequencies such as 433 MHz will go through the human body and are best when maintaining contact is imperative.”

– From: Critical Capabilities for Indoor Location Services, Global; Tim Zimmerman, Annette Zimmermann, Gartner, January 2020

For related information, check out our whitepaper on the differences between 433MHz and Wi-Fi based systems.

RTLS Solution Architecture


  • – GuardRFID hardware infrastructure deployed at the customer site
  • – An enterprise grade server software deployed on-premise or in the cloud
  • – Active RFID tags carried or attached to the people or asset being monitored or protected
  • – Integration to third-party systems for data exchange, alarm generation and other purposes
  • – Mobile and desktop clients for users to monitor and control the solution
  • – Rich set of reports that can be used for a variety of diagnostic and regulatory purposes

How GuardRFID RTLS Works

Triangulation using 433MHz active RFID technology

Tag Readers are installed at regular intervals to work together and provide the location of tags based on the relative beacon strength. Wi-Fi based solutions also leverage location data from access points.

Exciters for room level, floor level, and fast response situations

Tag Exciters are installed at entry and exits to rooms, buildings and important locations to ensure tags are identified on approach through the exciter field.

Controllers for access control and alarms

Tag Reader Controllers are connected to door and elevator controls to help provide access control and generate activate alarm response like alarm lights and sounders.

Different clients for different needs

The GuardRFID RTLS solution includes the use of the AllGuard software. Users can access the software from a desktop computer, web browser or mobile device for added flexibility.

Options for indoors and outdoors

Infrastructure equipment is available in indoor and outdoor models to provide RTLS to various environments. Including -EX model equipment that are rated for potentially explosive hazardous environments. Includes different connectivity options.

Variety of tags for a range of operations

GuardRFID provides tags of different sizes, weights, and applications to meet your requirements. You can choose tags with special features like tamper detection, call alerts, fall detection, temperature sensing, motion detection and rated for hazardous environments.

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