Short- and open-stub loaded spiral resonator and its application in planar microstrip filters
- Publication Type:
- Journal Article
- IET Microwaves, Antennas and Propagation, 2017, 11 (3), pp. 363 - 369
- Issue Date:
|Short- and open-stub loaded spiral resonator and its application in planar microstrip filters.pdf||Published Version||4.05 MB|
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© The Institution of Engineering and Technology. A novel short- and open-stub loaded spiral resonator (SOSL-SR) is presented and analysed by the odd- and even-mode method to obtain three controllable resonant modes. Therefore, a triple-mode bandpass filter (BPF) has been designed with good frequency selectivity based on the proposed SOSL-SR. Then, by dividing these three resonant modes into two passbands or stopbands, a dual-band BPF and a dual-band bandstop filter using the proposed SOSL-SR have been demonstrated. Because of the spiral structure, the sizes of these three designed microstrip filters are reduced significantly. Good agreement between simulated and measured results validates the design concept.
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