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A new LC series element for compact bandpass filter design

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7 Author(s)
J. Martel ; Grupo de Microondas, Univ. de Sevilla, Spain ; R. Marques ; F. Falcone ; J. D. Baena
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A new LC series element based on a modified version of the split rings resonator introduced in is proposed. Owing to its small electrical size, the new open split ring resonator (OSRR) is a very attractive element for compact bandpass filter design. As an example, we have designed and fabricated a filter to produce a bandpass around the resonance frequency of the employed OSRRs. The filter bandwidth is controlled by the length of the transmission lines connecting the OSRRs. Sharp and deep out-of-band rejection is achieved by cascading several OSRRs. Circuit theory and electromagnetic based simulations reasonably agree with experiments.

Published in:

IEEE Microwave and Wireless Components Letters  (Volume:14 ,  Issue: 5 )