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Medium Frequency Propagation Prediction Techniques and Antenna Modeling for Intelligent Transportation Systems (ITS) Broadcast Applications
| 题名： | Medium Frequency Propagation Prediction Techniques and Antenna Modeling for Intelligent Transportation Systems (ITS) Broadcast Applications |
| 作者： | DeMinco, N. |
| 关键词： | Driver aid information and routing system; Medium frequency; Radio communication; Radio waves; Wave propagation; Radio signals; Radio antennas; Communication systems; Driver aid systems; Ground waves(Electromagnetic); Sky waves; Prediction |
| 摘要： | This paper discusses the basic aspects of radio-wave propagation and antenna modeling in the medium frequency (MF) band. This band covers the frequencies of 300 to 3000 kHz. More specifically, we are concerned with the ground wave and the sky wave in the 300 kHz to 1705 kHz. The ground wave models described in this paper are valid from 10 kHz to 30 MHz. The AM Broadcast band of 535 to 1605 kHz is in this band and is planned to be used in the Advanced Traveler Information Systems (ATIS) of Intelligent Transportation Systems (ITS) for rural travelers. This paper describes radio wave propagation together with antenna modeling in this frequency band so that a better understanding of the phenomena can be obtained for use in design and application of ITS subsystems. The models described can be used for designing systems and making performance predictions for both of these ITS applications and any other systems that operate in this band. The paper contains descriptions of both sky-wave and ground-wave propagation models in addition to the methodology used to analyze antennas that operate in this band. A method of calculating and normalizing antenna gain for MF systems computations is also discussed. Some comparisons of measured and predicted data are also contained in the descriptions. |
| 总页数： | 84p |
| 报告类型： | 科技报告 |
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