Islak Kar Sebebiyle İçten Besleme Tipi Mikroşerit Dikdörtgensel Yama Antenden Yayılan EM Dalgalarının Zayıflaması

Year 2024, Volume: 27 Issue: 2, 455 - 459, 27.03.2024

Rabia Özkan Oğuzhan Mert , Yusuf Yılmaz Feyza Ramazan Mehmet Duman

https://doi.org/10.2339/politeknik.1118193

Cited By: 2

Abstract

Mikroşerit yama antenler, düşük maliyetleri, küçük boyutları ve kolay imalatları nedeniyle öne çıkmaktadır. Bu çalışma, 2.6 GHz frekansında işlev gören bir mikroşerit dikdörtgensel yama antenin tasarımını ve farklı hava koşullarının anten üzerindeki etkisini göstermektedir. CST programında anten tasarımı ve laboratuvarda antenin imalatı sonrasında istenilen frekans ve desibel seviyesinde ölçüm yapılmıştır. Bu uygulama, VNA ile yapılan normal ölçümlerin dışında, farklı kar tipleri ile birlikte yapılan deneyleri ve sonuçları da içermektedir. Tasarlanan mikroşerit yama antenin, merkez frekansta, -18.48 dB olarak iyi bir S11 saçılma parametresi değeri elde edilmiştir. Anten üzerinde zayıflama ve termal etkiler nedeniyle ıslak kar olduğu durumlarda bu değer -5 dB civarına düşmüştür. Antenden kar kaldırılsa da karın bıraktığı ıslaklık nedeniyle eski S11 değeri tekrar elde edilememiştir ve yaklaşık -14 dB'ye ulaşılmıştır. Sonuç olarak, elektromanyetik dalgaların zayıflaması ıslak kar gibi farklı koşullar altında nano VNA ile yapılan araştırmalara göre ilk kez test edilmiş ve literatürdeki bilgilere göre uyumlu sonuçlar alınmıştır. Islak kar ve su ile olan zayıflama, içinde boşluklar bulunan kuru kara göre daha fazladır.

Keywords

zayıflama ve termal etki, kar ve ıslaklık, mikroşerit yama anten, nano VNA ölçümü

Attenuation of EM Waves Emitted From Inset Feed Type Microstrip Rectangular Patch Antenna by Wet Snow

Abstract

Microstrip patch antennas stand out because of their low cost, smaller size and easy fabrication. The study presents the design of a microstrip rectangular patch antenna operating at 2.6 GHz frequency and the effect of different weather conditions on the antenna. During the antenna design on CST program and manufacturing in the laboratory, it is aimed to perform the measurement at the desired frequency and decibel level. The study includes experiments and results made on different types of snow, apart from the normal measurement with the VNA. A good S11 scattering value was obtained at the desired frequency in the designed microstrip patch antenna as -18.48 dB. This value decreased to around -5 dB when there was wet snow on the antenna due to attenuation and thermal effects. If the snow was removed from the antenna, the old S11 value could not be returned because of the wetness left by the snow, and it remained at approximately -14 dB. Consequently, the attenuation of the electromagnetic waves have been confirmed by the literature under different conditions as wet snow with nano VNA for the first time. Attenuation by wet snow and water is greater than dry snow with voids.

Keywords

attenuation and thermal effects, snow and wetness, microstrip patch antenna, nano VNA measurement

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