|Home||Internet of Things||Aerospace||Apparel||Energy||Defense||Health Care||Logistics||Manufacturing||Retail|
Ask The Experts Forum
Are Bistatic or Monostatic Readers More Effective?
Which is better: An RFID interrogator with four bistatic antennas, or one with eight monostatic antennas?
Bistatic antenna systems generally deliver better performance in passive ultrahigh-frequency (UHF) RFID systems, because they have separate, dedicated antennas to send and receive signals, while a monostatic system utilizes the same antenna to both transmit and receive. Monostatic readers emit a lot of energy to power up a tag, then must stop and start again in order to receive a weak signal back from the interrogator. Their sensitivity and dynamic range are generally not as good as those of a bistatic system.
The main reason for choosing a monostatic system over a bistatic system is cost. It is cheaper to use one antenna to send and receive than two. However, if your choice is between an eight-port monostatic reader, which has eight separate antennas, and a four-port bistatic reader, which also requires eight antennas, the expense is likely to be the same. So under most conditions, I would choose a four-port bistatic system over an eight-port monostatic system.
Of course, if the eight-port monostatic antenna can cover two dock doors or portals, and the four-port bistatic antenna can cover only one portal, then it might be more cost-effective to use the monostatic antenna system.
—Mark Roberti, Editor, RFID Journal
Login and post your comment!
Not a member?
Signup for an account now to access all of the features of RFIDJournal.com!
SEND IT YOUR WAY
RFID JOURNAL EVENTS
ASK THE EXPERTS
Simply enter a question for our experts.
|RFID Journal LIVE!||RFID in Health Care||LIVE! LatAm||LIVE! Brasil||LIVE! Europe||RFID Connect||Virtual Events||RFID Journal Awards||Webinars||Presentations|