کنفرانس مهندسی برق ایران

صفحه اصلی / سی و دومین کنفرانس بین المللی مهندسی برق

Efficient NVIS HF Hinged Half-Loop Vehicular Antenna Using Modal Analysis

نویسندگان :

Nasser Haghighat¹ Javad Nourinia² Changiz Ghobadi³ Keyhan Hosseini⁴ Farzad Alizadeh⁵ Bahman Mohammadi⁶

1- دانشگاه بناب 2- دانشگاه ارومیه 3- دانشگاه ارومیه 4- دانشگاه کردستان 5- دانشگاه ارومیه 6- دانشگاه ارومیه

کلمات کلیدی :

Half-loop antenna،vehicular antenna،hinged antenna،HF antenna،modal analysis،NVIS communication

چکیده :

This paper presents an efficient near vertical incidence skywave (NVIS) high-frequency (HF) hinged half-loop vehicular antenna. 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. Utilizing the theory of characteristic modes, we identify suitable platform modes and ascertain practical methods for their excitation. This approach enables a substantial increase in the bandwidth of the proposed antenna compared to the isolated antenna system bandwidth at 25 MHz. The antenna pattern and return loss are reported and further discussions related to tuning network and measurement will be presented at the conference.

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