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This paper presents a transformer-based coupled resonator structure for a bandpass filter (BPF) using the integrated passive device technology on a glass substrate. The use of such a transformer-based coupled BPF not only provides the advantage of compact size but also creates extra transmission zeros to enhance the roll-off rate or the desired stopband rejection. The measured results verify the validity...
This paper presents design and modeling techniques for integrated passive devices (IPDs) that can be stacked with RF chips in a highly integrated three-dimensional IC for wireless applications. The research starts to study winding and modeling techniques for high-efficiency planar transformers. In an Above-IC process for silicon IPDs, the planar transformers realized can provide a passive efficiency...
This letter presents very compact stacked LC resonator structures and their coupling and excitation techniques for designing the bandpass filters operating in the 3.5 GHz WiMAX band. Using a coupled stacked LC-resonator structure not only greatly reduces the overall size but also can create multiple transmission zeros to enhance roll-off rate or desired stopband rejection for the designed bandpass...
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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