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1,26 GHz REZONANS FREKANSINDA ÇALIŞAN ÇİFT TABAKALI YÜKSEK KAZANÇLI MİKROŞERİT DİKDÖRTGEN YAMA ANTEN TASARIMI

DESIGN OF A 1.26 GHz HIGH GAIN MICROSTRIP RECTANGULAR PATCH ANTENNA USING DOUBLE LAYER

Journal Name:

  • Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

Publication Year:

  • 2013

Key Words:

Keywords (Original Language):

Author NameUniversity of Author
Abstract (2. Language): 
In this paper, we introduce a method using double layer with airgap to design a high gain single element microstrip rectangular patch antenna operating at 1.26 GHz. Double layer technique provide us easy fabrication, besides, under layer consisted of double-sided copper ensure using one side as ground plane and other side as feed network for higher gain array antenna. We have purposed to obtain high gain microstrip patch antenna which has wide coverage area and low side lob level using a simple method of designing. In addition, low cost fabrication also has been taken into account. To do that, we used a widely available FR4 (Fire Resistant 4) material and instead of using low-loss and expensive substrates, we inserted an air gap between radiating and ground planes. This air gap reduces both the electric field concentration on the lossy epoxy and the effective dielectric constant of the radiating plane. Therefore, a low-loss and high-gain single element rectangular patch antenna is obtained. The simulation results conducted by CST Microwave Studio and measurement results carried out in an anechoic chamber of the proposed antenna are included in this study. The close similarity between simulation results and measurement results has been observed. This proposed antenna is appropriate to use in especially life detection radar systems, global position satellite systems and wireless communication systems.
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Abstract (Original Language): 
Bu çalışmada, 1,26 GHz rezonans frekansında çalışan, yüksek kazançlı tek elemanlı, çift taban malzemeli ve hava boşluklu mikroşerit yama anten tasarımı sunulmaktadır. Çift tabaka tekniği, bize anten üretiminde kolay üretim sağlamasının yanı sıra, her iki tarafı bakır olan alt tabaka, bir yüzeyin toprak düzlemi, diğer yüzeyin ise bu çalışma için ihtiyaç durumunda bir yükseltici, dizi anten tasarımlarında besleme ağı tasarlanmasına imkan sağlayarak yeni bir yaklaşım sunmaktadır. Bu tasarımda, yüksek kazanç, dar bant genişliği, düşük yan demet seviyeleri, geniş kapsama alanı ve üretim kolaylığı haricinde düşük maliyetli bir üretim ayrıca hedeflenmiştir. Bunun için, pahalı ve yalıtkan kaybı düşük olan malzemeler kullanmak yerine, kolay temin edilebilen ve ucuz olan iki adet FR4 (Fire Resistant 4) taban malzemesi kullanılmıştır. Bu iki tabaka arası hava boşluğu ile ayrılarak, yalıtkan taban malzeme üzerinde oluşan elektrik alanı yoğunluğu ve etkin dielektrik sabiti azaltılmıştır. Böylece, düşük kayıplı yüksek kazançlı tek eleman mikroşerit yama anten elde edilmiştir. Çalışma, önerilen antenin simülasyon programı (CST Microwave Studio) ile yapılan benzetimini ve yansımasız odada yapılan ölçüm sonuçlarını içermektedir. Elde edilen benzetim sonuçları ile ölçüm sonuçlarının uyumlu olduğu gözlemlenmiştir. Önerilen anten, başta canlı tespit radar sistemleri olmak üzere küresel konumlama sistemleri ve kablosuz haberleşme sistemleri için kullanımı uygundur.
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