Design and performance of an integrated antenna for a 433MHz car park monitoring system

A top-loaded vertical monopole antenna is designed to be integrated in a wireless sensor of a car park monitoring system operating at 433MHz. The final design came out from a careful analysis of the effects on the antenna input impedance of nearby elements (photovoltaic cells, battery, sensor cover, ultrasonic transducer). A performance comparison between the proposed vertically polarized antenna and a commercial ceramic antenna is presented, showing an average increase of the received power level at the reader of about 2.2dB, when measurements are performed on a distance range of 10-60m between the sensor and the reader antenna of the car park monitoring system.

[1]  J.-M. Woo,et al.  Design of electrically small, folded monopole antenna using C-shaped meander for active 433.92 MHz RFID tag in metallic container application , 2008 .

[2]  Jiannong Cao,et al.  An Intelligent Car Park Management System based on Wireless Sensor Networks , 2006, 2006 First International Symposium on Pervasive Computing and Applications.

[3]  C. Phongcharoenpanich,et al.  Short-distance and near-ground signal measurements in a car park of wireless sensor network system at 433 MHz , 2008, 2008 5th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology.