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This paper describes a triple-resonance stacked spiral resonator (SSR) structure for designing very compact tripleband bandpass filters. The resonant frequencies of the proposed SSR structure can be determined by designing the spiral geometry and controlling the mutual coupling in a stacked structure. The triple passband bandwidths can then be determined by the spacing of different layer patterns...
This paper presents a transformer-coupled resonator structure to integrate a balun into a bandpass filter using integrated passive device technology on glass substrate. The use of the transformer not only greatly reduces the size of the bandpass filter, but also easily provides the coupling to the balanced output ports. In addition, the tapped feed-lines are used to obtain a good impedance match at...
In this paper, a compact dual-band bandpass filter using spiral-shaped half-wavelength resonator has been designed and implemented. In addition, for transmission zero generation, the tapped-line input/output feed mechanism is used in this filter. Based on this architecture, we can easily achieve a significant size reduction compared with conventional open-loop resonator BPF. A well agreement between...
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