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A compact ultra wide-band bandpass filter is proposed in this paper. The BPF consists of a hairpin-type LPF with a chip capacitor and a HPF using parallel-coupled lines. Firstly, the circuit model of LPF is investigated. Next, the characteristics of the HPF is also examined, and the results show the broad bandpass characteristics. Then the performances of UWB BPF composed of the LPF and the HPF are...
In this study, a new BPF is proposed by combining the periodic dielectric structure and the short-ended stubs. First, the analytical results showed that the high dielectric rods implanted in the dielectric substrate provides a stopband without affecting the passband which the short-ended stubs produce. Next, the proposed BPF is fabricated by using the LTCC technology. Lastly, the fabricated BPF's...
This paper presents two tunable notch filters (TNFs) for detect-and-avoid (DAA) implementation in an ultra-wideband (UWB) radio system. The developed filters have relatively wide- and narrow-stopband, respectively, using two different resonant structures. A system experiment has been carried out to evaluate the influence of bandwidth of notch band on the system performance when the two different filters...
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