مشخصات پژوهش

عنوان	Efficient NVIS HF Hinged Half-Loop Vehicular Antenna Using Modal Analysis
نوع پژوهش	مقاله ارائه شده کنفرانسی
کلیدواژه‌ها	Half-loop antenna, hinged antenna, HF antenna, modal analysis, NVIS communication, vehicular antenna
چکیده	This paper presents an efficient near vertical incidence skywave (NVIS) hinged half-loop vehicular antenna for high-frequency (HF) applications. The antenna consists of two main loops that play as the main radiating elements and also four smaller loops that both improve the antenna performance and help the dynamic performance of the overall structure under unwanted stress and road irregularities. The antenna arms are folded to completely cover an area as large as the roof of the car. We recognize suitable platform modes and ascertain practical methods for their excitation based on modal analysis. This approach enables a substantial increase in the antenna bandwidth in comparison to the isolated antenna system bandwidth at 25 MHz. Pattern and return loss of antenna are reported and at the conference further discussions related to tuning network and measurement will be illustrated.
پژوهشگران	بهمن محمدی (نفر ششم به بعد)، فرزاد علیزاده (نفر پنجم)، سید کیهان حسینی (نفر چهارم)، چنگیز قبادی (نفر سوم)، جواد نوری نیا (نفر دوم)، ناصر حقیقت (نفر اول)