Low-Profile Antenna With Elevated Toroid-Shaped Radiation for On-Road Reader of RFID-Enabled Vehicle Registration Plate

A low-profile antenna installed on the road surface for RFID-enabled vehicle communication is presented. The antenna in this application operates as on-road sensor for vehicles identification. To that end, the antenna is required to have an elevated toroid-shaped radiation, so that the reader can easily interrogate an RFID-enabled vehicle license. The antenna is designed using a capacitive-loaded inverted-F radiator, which has an omnidirectional radiation in the azimuth plane. To adjust the radiation pattern to the required elevation above the road surface, and isolate the radiation from the effects of variable road conditions, a corrugated ground plane with perturbed surface impedance is used underneath the radiator. The antenna's configuration is verified by full-wave finite difference time domain simulations with various road surface conditions. A prototype antenna is then developed and tested in realistic field scenarios as on-road sensor for vehicles identification. The results show that the antenna possess more than 15 dB return loss, more than 1.5 dBi gain, vertical polarization, and desirable radiation pattern from 880 to 960 MHz, which is the standard band licensed for RFID-enabled plates. The antenna also successfully communicates with an RFID-enabled vehicle registration plate.

[1]  Stephanie Boehm,et al.  Handbook Of Smart Antennas For Rfid Systems , 2016 .

[2]  María de la Vega Pérez Gracia,et al.  Civil Engineering Applications of Ground Penetrating Radar , 2015 .

[3]  B. Kippelen,et al.  RF Tag Antenna Performance on Various Materials Using Radio Link Budgets , 2006, IEEE Antennas and Wireless Propagation Letters.

[4]  Etienne Perret,et al.  Design of Antennas for UHF RFID Tags , 2012, Proceedings of the IEEE.

[5]  Arpad L. Scholtz,et al.  A Dual-Band HF / UHF Antenna for RFID Tags , 2008, 2008 IEEE 68th Vehicular Technology Conference.

[6]  G. Marrocco.  RFID Antennas for the UHF Remote Monitoring of Human Subjects , 2007, IEEE Transactions on Antennas and Propagation.

[7]  Mohammad Tariqul Islam,et al.  New Compact Dual-Band Circularly Polarized Universal RFID Reader Antenna Using Ramped Convergence Particle Swarm Optimization , 2014, IEEE Transactions on Antennas and Propagation.

[8]  Jungang Yin,et al.  Compact 0.92/2.45-GH Dual-Band Directional Circularly Polarized Microstrip Antenna for Handheld RFID Reader Applications , 2015, IEEE Transactions on Antennas and Propagation.

[9]  Nemai Chandra Karmakar.  Handbook of Smart Antennas for RFID Systems: Karmakar/Smart Antennas , 2010 .

[10]  Y. Rahmat-Samii,et al.  Reflection phase characterizations of the EBG ground plane for low profile wire antenna applications , 2003 .

[11]  G. Thiele,et al.  Antenna theory and design , 1981 .

[12]  Milan Polivka,et al.  Stepped Impedance Coupled-Patches Tag Antenna for Platform-Tolerant UHF RFID Applications , 2015, IEEE Transactions on Antennas and Propagation.

[13]  Lauri Sydanheimo,et al.  Electromagnetic Analyses of Near Field UHF RFID Systems , 2010, IEEE Transactions on Antennas and Propagation.

[14]  Xianming Qing,et al.  A Universal UHF RFID Reader Antenna , 2009, IEEE Transactions on Microwave Theory and Techniques.

[15]  R. Cao,et al.  Wideband Compact CPW-Fed Circularly Polarized Antenna for Universal UHF RFID Reader , 2015, IEEE Transactions on Antennas and Propagation.

[16]  Xianming Qing,et al.  Impedance Characterization of RFID Tag Antennas and Application in Tag Co-Design , 2009, IEEE Transactions on Microwave Theory and Techniques.

[17]  Dieter Uckelmann,et al.  Using RFID in License Plates and Vignettes for Electronic Vehicle Identification - Structured Testing of Passive UHF Systems for Vehicle Identification , 2012, ImViReLL.

[18]  Per-Simon Kildal,et al.  Artificially soft and hard surfaces in electromagnetics , 1990 .

[19]  Hang Wong,et al.  Polarization Reconfigurable Wheel-Shaped Antenna With Conical-Beam Radiation Pattern , 2015, IEEE Transactions on Antennas and Propagation.

[20]  Nemai Chandra Karmakar.  Advanced RFID Systems, Security, and Applications , 2012 .

[21]  Da-Gang Fang,et al.  Wideband Circular Patch Antenna With Conical Radiation Pattern , 2015, IEEE Antennas and Wireless Propagation Letters.

[22]  Yifan Wang,et al.  Geometry Based Analysis of an Alternative RFID Interrogator Placement for Electronic Vehicle Identification , 2015, 2015 IEEE 18th International Conference on Intelligent Transportation Systems.

[23]  Richard J. Langley,et al.  Circular microstrip patch antennas on glass for vehicle applications , 1998 .