Capacitively Loaded, Inductively Coupled Fed Loop Antenna With an Omnidirectional Radiation Pattern for UHF RFID Tags

A capacitively loaded, inductively coupled fed loop antenna with an omnidirectional radiation pattern for UHF radio frequency identification (RFID) tags is proposed. The inductively coupled feed structure is beneficial for conjugate impedance matching. The loaded capacitors in the radiating and feed...

Full description

Saved in:
Bibliographic Details
Published inIEEE antennas and wireless propagation letters Vol. 12; pp. 1161 - 1164
Main Authors Liu, Qi, Yu, Yufeng, He, Sailing
Format Journal Article
LanguageEnglish
Published IEEE 2013
Subjects
Antenna measurements
Antenna radiation patterns
Capacitive load
Capacitors
Dipole antennas
inductive feed
omnidirectional
radio frequency identification (RFID)
Radiofrequency identification
Resonant frequency
UHF
Online AccessGet full text

Cover

More Information
Summary:A capacitively loaded, inductively coupled fed loop antenna with an omnidirectional radiation pattern for UHF radio frequency identification (RFID) tags is proposed. The inductively coupled feed structure is beneficial for conjugate impedance matching. The loaded capacitors in the radiating and feeding loops allow for easy control of the resonant frequency and the antenna reactance, respectively. The omnidirectional radiation pattern on the horizontal plane makes the proposed tag insensitive to be mounted on different target objects. With a small size of 43 × 43 mm 2 , the measured maximum reading range of the prototype is 9.5 m with a total transmitted power of 4.0 W effective isotropic radiated power (EIRP).
ISSN:1536-1225
1548-5757
1548-5757
DOI:10.1109/LAWP.2013.2281070