Dear Yesan Sellan Sir, Please find below the key differences between HF & UHF technology in our point of view as a RFID Technology hardware manufacturer. Fundamentally we feel that if a body like NISO has suggested to use HF as a standards then UHF should not be used. Also from ratio of current installations across India, it is very easy to judge which technology is appropriate and widely used. A) Limitations & Benefits of using UHF (865-867 Mhz) in Library and Campus Environment: 1. Anti-theft: Security Bit not possible in UHF tags. Database should be up all the time for securing an unissued library item. 2. Read-Write capability with data locking not possible with standard UHF tags. 3. Data-rewrite in UHF tags not more than 10000 times. 4. Standard EPC Gen2 UHF tags come with only 96 bit of memory and doesn't have a factory inbuilt unique UID. 5. UHF technology is more prone to metallic interference compared to HF. 6. Standard EPC Gen2 UHF technology is widely used for warehouse & supply chain management applications and has few OEMs who support range of hardware for library application. 7. UHF Smart cards are generally not used for Campus applications due to patron privacy concerns. 8. UHF technology is more directional in nature i.e. read range in one orientation will be more pronounced compared to other orientation. Giving unstable performance. 9. Read distance in a given direction with UHF tags is up to 2m which is more than HF tags. 10. UHF tags are comparatively cheaper than HF tags since the available memory capacity is less. B) Benefits & Limitations of using HF (13.56 Mhz) in Library and Campus Environment: 1. NISO (National Information Standards Organisation) recommends HF (13.56 Mhz) platform for use of RFID in libraries. 2. An ISO 28560 specifically for use of RFID in Libraries is based on use of HF technology. 3. HF (13.56 Mhz) to date has been most commonly used platform for RFID applications in Library. And multiple OEMs , Vendors, System Integrators are available worldwide to support the large installed base of HF (13.56 Mhz) systems in Libraries. 4. EAS bit (electronic article surveillance) is feature of Phillips I-Code SLI HF (13.56 Mhz) tags. It allows the library security system to work even if the ILMS Server system is offline. 5. Standard HF tags used in library environment have an inbuilt unique UID and memory options of 1024 / 2048 bits with read-write & data locking capability. 6. Phillips I-Code SLI chips have data-rewrite capability of at least 100000 times & data retention of 10 yrs. 7. HF frequency allows for omnidirectional identification and is less prone to metallic interference compared to UHF technology which is directional in nature. 8. Cost of hardware is low in Implementing HF technology compared to UHF. 9. Most widely used smart cards worldwide are based on HF technology platform. This allows use of a common campus card for multiple applications such as ID-cards, E-purse, Attendance & Access control, transportation etc. 10. With HF technology read distance is limited up to 1m. Thanks & Regards Tushar Popat B-404, Satyamev I, Opp. Gujarat High Court, Sarkhej Gandhinagar Highway, Ahmedabad - 380 060 Phone: +91 79 2766 5256 Mob: 081560 86160 Web: www.rapidradio.co.in, http://www.rapidradio.co.in/products.html E-mail: tushar.popat@rapidradio.co.in On Fri, Jul 18, 2014 at 5:52 PM, SAIACS, Chief Librarian <library@saiacs.org
wrote:
Dear Colleagues,
It is to seek your insights and valuable information on use of UHF RFID tags for library security system. We would like to know whether or not use of UHF will be harmful to human bodies? Are There Any Health Risks With Prolonged Exposure to UHF? We are in the process of identifying suitable technology (HF or UHF) for our library, your inputs will help us to make right choice. Should we consider using HF over UHF??
Please share your experiences and opinions in this regard.
Thanks
Yesan Sellan, B.Com., MLISc., PGDLAN, UGC-NET., BCS
Chief Librarian
South Asia Institute of Advanced Christian Studies (SAIACS)
363 Dodda Gubbi Cross Road, Kothanur P.O., Bangalore 77, India
Phone: 91 80 2846 5235/5344/ 5649, Fax: 91 80 28465412, Mobile: 91-9972348251
Website: <http://www.saiacs.org/> www.saiacs.org Alternative Email: <mailto:yesans@gmail.com> yesans@gmail.com or <mailto:yesan.sellan@saiacs.org> yesan.sellan@saiacs.org
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