I.A. Gerasimov - Post-graduate Student, Leading Design Engineer, JSC «Concern «Automation» (Moscow) E-mail: gia@ao-avtomatika.ru M.A. Minkin - Dr.Sc. (Eng.), Professor, Chief Research Scientist, JSC «Concern «Automation» (Moscow) E-mail: mma@ao-avtomatika.ru

The paper calculated the low-profile and whip antennas mounted on the roof of the car. Each of the considered antenna types have their advantages and disadvantages. The results of calculations of parameters of antennas when installed on vehicles with a metallic and insulating roof. A comparative analysis of the results. Studies have shown that in terms of the desired characteristics, the dependence of VSWR of accommodation conditions in a low-profile antenna can not be traced so clearly, like a whip. However, the antenna radiation pattern in both cases varies quite strongly. These relatively high levels of the electric field strength inside the vehicle, especially if you install whip antenna on the roof of the di-electric, requires supportive measures to ensure that the electromagnetic safety of the passengers. The results of the research replacement whip antennas (the most widely used today) in the low-profile should be recognized and ap-propriate, since low-profile antennas are comparable or even slightly better performance. At the same time, it is obvious enough that the low-profile antenna in their present form are not radically solve the problem of providing high values of the main characteristics, including electromagnetic safety characteristics, when installed on an insulating roof of the car. Urgent need of further improvement, including on the basis of new technical solutions and new materials in order to improve the shape of patterns and reducing the field levels in the lower half.

 

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