Yer Gözlem Uydusu ve Radar Uygulamaları için Bant Geçiren Frekans Seçici Yüzey Filtresi

Bu makalede, X bant frekans rejiminde uydu ve radar uygulamaları için bir bant geçiren frekans seçici yüzey filtresi önerilmiştir. Çalışma 2 GHz ile 14 GHz arasındaki geniş bir frekans bandında hem sayısal hem de deneysel olarak gerçekleştirilmiştir. 7.3 GHz ile 9.3 GHz arasında 2 GHz 3 dB bant genişliği elde edilmiştir. Önerilen yapı polarizasyona duyarsız özelliğe sahiptir. Ayrıca, hem TE hem de TM polarizasyon modlarında çok küçük frekans sapmaları ile 0° ila 60° arası geliş açısı aralıklarıyla açısal kararlılığa sahiptir. FSS yapısının prototipi 18cm x 18cm boyutlarında 20x20 birim hücrelerden oluşmaktadır. Deneysel çalışmalar Agilent PNA-L vektör ağ analizörü ve iki huni anten kullanılarak gerçekleştirilmiştir. Bant geçiren filtre, gürültüleri önlemek ve istenmeyen frekans bantlarını reddetmek için bir anten radomu olarak birçok uydu ve radar sisteminde etkin bir şekilde kullanılabilir.

Anahtar Kelimeler:

FSS, Bant geçiren filtre, Uydu, Radar

A Bandpass Frequency Selective Surface Filter for Earth Observation Satellite and Radar Applications

In this paper, a bandpass frequency selective surface filter has been suggested for the satellite and radar applications at X band frequency regime. The study has been conducted both numerically and experimentally in a wide range frequency band between 2 GHz and 14 GHz. 2 GHz of 3 dB bandwidth between 7.3 GHz and 9.3 GHz has been obtained. The proposed structure has the polarization insensitive characteristic. It also has angular stability with the incident angle ranges from 0° to 60° with very small frequency deviations both TE and TM polarization modes. The prototype of the FSS structure is composed of 20x20 unit cells in a dimension of 18cm x 18 cm. The experimental studies have been conducted by using Agilent PNA-L vector network analyzer with two horn antennas. The bandpass filter can be effectively used in many satellite and radar systems as an antenna radome to prevent noises and to reject unwanted frequency bands

Keywords:

FSS, Bandpass filter, Satellite, Radar,

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