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For the first time, a 3-dimentional (3-D) transmission line dual-mode resonator is proposed by using the low temperature co-fired ceramic (LTCC) technology. The proposed dual-mode resonator is reasonably folded in both vertical and horizontal directions for constructing a miniaturized bandpass filter (BPF), which overcomes the vital shortcoming of large circuit size of the LTCC distributed-element...
Some novel bandstop filters (BSF's) are proposed,including a sharp-rejection BSF via the combination of the conventional BSF and signal interference technique, a sharp-rejection dual-band BSF using signal-interaction concept with three paths. The measurement results have a good agreement with the simulation results.
This paper presents two kinds of discriminating coupling scheme and the application to LTCC bandpass filters. Both continuous and separated coupling regions are utilized to realize the discriminating coupling scheme which can block the third harmonic and allow the transmission of signals at the fundamental frequency. It is realized by selecting proper coupling region without adding extra circuit....
A microstrip-line dual-band bandpass filter using stub-loaded resonator (SLR) with good selectivity in first pass band and wide bandwidth in second pass band is proposed in this paper. By properly adjusting the gap between source-load and SLR, good return loss at lower frequencies can be achieved. To further improve the rejection level between the first pass band and second pass band, the spur-line...
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