Electromagnetic analysis and design of miniaturized branchline couplers

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Elektrik ve Elektronik Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2014

Öğrenci: GALİP ORKUN ARICAN

Danışman: GÖNÜL SAYAN

Özet:

Branchline couplers are widely used components in the design of microwave devices. In addition to other applications, these couplers have been crucial elements for high power GaN based MMIC designs where layout space limitations are known to be critical. The conventional branchline couplers designed by four quarter wavelenght transmission lines. This type of conventional branchline coupler covers a large physical area that leads to high costs in MMIC fabrication. Therefore, design of miniaturized branchline coupler with increased operational bandwidth is important to minimize the chip size and increase the bandwidth of system. In additional, usage of optimum electromagnetic simulation in terms of accuracy and simulation time is significant to reduce the simulation time without suffering from the loss of accuracy. In this thesis, branchline couplers will be analyzed and designed paying special attention to increase the operation bandwidth and reduce the area as small as possible. Different electromagnetic solvers will be used to analyze the coupler topologies and results will be compared in terms of accuracy and simulation time.