Compact transponder front-end with enhanced gain for electronic toll collection at 5.8 GHz

Abstract

Abstract-In this paper we present a compact semi-passive front-end designed for Dedicated Short Range Communication (DSRC) at 5.8 GHz for vehicular technology applications. The front-end implementation is based on the optimal integration of a low-bias RF diode and a compact circular polarized antenna array.The antenna array natively exhibits the optimum termination to the diode, ensuring the best trade-off between detection and back-scattering on the basis of frequency conversion mechanism. The antenna is characterized by enhanced gain and polarization purity while extremely compact, hence particularly suitable for tag integration.The fabricated prototype is tested in envelope detection, backscattering and in a functional test conducted according to the ETSI EN300674 communication layer. The best measured BackScattering gain exceeds 7.8 dB, with a sensitivity of 54 mVpp with a signal of -45 dBm. A range at 9 m without communication errors is observed when operating with a EIRP of 33 dBm.

A 5.8 GHz RF Receiver Front-End with 77.6 dB Dynamic Range AGC for a DSRC Transceiver

“…Recently, the new Electronic Toll This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/ Collection (ETC) system has also been switched to 5.8 GHz band [3][4][5][6][7][8][9]. Using DSRC is principal for an ETC system when it is about a two-way wireless communication between the Onboard Units (OBUs) and the Roadside Units (RSUs).…”