A UHF RFID antenna operates between 860-960MHz frequency range to catch the EMF (Electromagnetic Field) radiated by the RFID reader. Depending upon the frequency and read range, there are five different types of UHF RFID antennas that will be introduced in this article.
Harting Locfield Antenna
Harting locfield antenna or traveling-wave antenna is based on typical coaxial cable. The coaxial cable acts as an antenna and can be deployed to support any three-dimensional shape. It enables users to create their own customized UHF RFID antenna reading zone. The RF wave travels along the dimension of coax cable.
Although the typical read range of Harting Locfied antenna is limited, it can move from a few centimeters to a few meters. The short-range, high gain, and millimetre diameter of the Harting Locfield antenna are exceptional properties, allowing it to attach with the RFID reader directly. The cable shape of the Harting Locfield antenna permits them to read RFID tags in various locations.
The unique shape and features of the Harting Locfield antenna make it suitable for different applications such as smart shelves, RFID in complex scenarios, machines, exit gates, and server racks in inventory controls. Thus, users can integrate Harting Locfield antenna to almost any cabinets, metal enclosures and racks. Nevertheless, the user must create a standard spacing/section between metal and antenna to acquire a high-quality RF signal.
Impinj Mini-Guardrail Antenna
The Impinj Mini-Guardrail Antenna has a small read-range zone. It can read less than and equal to 7.5cm. Due to limited range-zone, it works ideally for controlled applications and small enclosures such as access control, encoding station based on high-speed, ticketing, packaging lines, pass-throughs, etc. All these applications can be achieved at limited costs and smooth installation.
Being a near-field antenna, it is the utmost choice for item-level identification. Most of the item-level applications don’t require high coverage area and length because their purpose is to read-only single tag in a dense environment. Consequently, Impinj Mini-Guardrail Antenna provides optimized results for a dense environment such as;
- Checking tickets at the toll stations
- Checking tickets at the railway stations
- Access control
- Document management
Keonn Advantenna p-12 Antenna
Keonn Advantenna-p12 has EU and US versions. The EU version operates between 865 to 868 MHz and in the US version, it operates between 902 to 928 MHz frequency range. The Keonn has designed compact-2 RFID UHF elements patch antenna having a circular polarization and a radiation pattern considered by a 60-degree beam width directed at the antenna long edge and 90-degree directed at the short, long edge.
Keonn Advantenna-p12 contains a thin form factor, enabling it to assimilate inside the items such as clothes, jewellery, shoes, etc. It can be used as a loss-prevention system at retail stores.
Another robust feature of this antenna is that it is easy to integrate them with pedestals electronic article surveillance (EAS) depending on acousto-magnetic technology. The EAS built on acousto-magnetic technology converts pedestals into hybrid schemes that revolve around both RFID and acousto-magnetic.
It is considered a long-range UHF RFID antenna with a high gain of 9 dBi, permitting it to use in both indoor and outdoor applications. With the MTI-MT-262006 antenna, a user can place a tag at any orientation because it is a circularly polarized antenna.
There are also called panel antennas, and a combination of multiple panel antennas can be used in applications that require coverage of fixed zone such as access control on toll stations or parking areas.
Times-7 A6590C Antenna
Like the MTI-MT-262006 antenna, it is also a circularly polarized antenna and provides 9 dB gain. It can support long-range and indoor applications such as attendance tracking. In contrast to the above, it offers a highly versatile form factor and extensive antenna to cover the demands of the following applications;
- Crowd tracking
- Race timing
- Integrated with mat, which is used in conference and official meetings
- Use cases that require grounded antenna