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Characteristics and Applications of the Tapered Feedline with Strong Coupling  

한상민 (고려대학교 전파공학과)
최준호 (고려대학교 전파공학과)
김영식 (고려대학교 전파공학과)
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Abstract
New feeding structures using linearly and exponentially tapered lines to planar microstrip resonators are proposed. These can overcome the design problems from coupling losses and impedance mismatching by increasing the coupling efficiency. The variation of its feeding angle is evaluated for the insertion loss and bandwidth and the feedline length is optimized at ${\lambda}_g$/2. The ring resonators and patches fed by the tapered line have been designed and implemented. The experimental results show that the insertion loss is enhanced by about 7 dB. Both rings and antennas are better matched, without disturbing the single-mode resonance or distorting their radiation pattern
Keywords
Tapered Lines; Feedlines; Microstrip Ring Resonators; Microstrip Patch Antennas;
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