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DESIGN OF A DECOUPLING NETWORK TO IMPROVE ISOLATION BETWEEN TWO PORTS OF MULTI-FUNCTIONAL ANTENNA
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Date
2022-6
Author
Tonga, Muhammed
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A multi-functional antenna considered in this thesis has different pattern shapes and ability to steer the beam by changing phase difference between its two ports. Coupling between these two ports is high, since two ports are excited coherently to establish a single mode in the antenna for the corresponding phase difference. Therefore, the antenna suffers from low and even negative gain value because of the coupling. In this thesis, a decoupling network is designed and implemented to the antenna to improve isolation between the ports. Thus, the ports are decoupled, and gain values are increased. Decoupling network theory is studied in detail and the antenna is redesigned to be able to apply the theory to the antenna. Decoupling network involves a reactive element. Different designs with an inductor and a capacitor are performed and their performances are compared with both simulation and measurement results. It is shown that 2-3 dB improvement in the gain of the antenna can be achieved through the use of decoupling network.
Subject Keywords
Decoupling Network
,
Multi-Functional Antenna
,
Isolation Improvement
,
Gain Enhancement
URI
https://hdl.handle.net/11511/98143
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Graduate School of Natural and Applied Sciences, Thesis
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M. Tonga, “DESIGN OF A DECOUPLING NETWORK TO IMPROVE ISOLATION BETWEEN TWO PORTS OF MULTI-FUNCTIONAL ANTENNA,” M.S. - Master of Science, Middle East Technical University, 2022.
