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      SCIE SCOPUS

      A highly miniaturized LTCC dual-band UWB filter using independent transmission zeros and lowpass filters

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      https://www.riss.kr/link?id=A107642838

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      다국어 초록 (Multilingual Abstract)

      In this paper, a compact dual-band ultra-wideband (UWB) filter has been newly designed and fabricated for 3.1-4.75GHz and 6.0-8.5GHz UWB system applications by embedding all passive lumped elements into low temperature co-fired ceramic (LTCC) substrat...

      In this paper, a compact dual-band ultra-wideband (UWB) filter has been newly designed and fabricated for 3.1-4.75GHz and 6.0-8.5GHz UWB system applications by embedding all passive lumped elements into low temperature co-fired ceramic (LTCC) substrate. In order to reduce its size/volume and prevent parasitic electromagnetic (EM) coupling between the embedded passive elements, it was newly designed by using a modified 3rd order Chebyshev filter topology and J-inverter transformation technology. Moreover, in order to completely reject the wireless local area network (WLAN) bands of 2.4GHz and 5.15GHz, an independent transmission zeros technology was applied. For forming the higher passband, lowpass filters were also applied with two LC resonant circuits by using roll-off characteristics by independent transmission zeros. The measured insertion losses in the lower and upper passbands were better than 2.5 and 2.3dB, respectively. Return loss and group delay were better than 8dB and 0.61ns, respectively in all the passbands. Independent transmission zeros that occurred at 5.17 and 5.42GHz provided suppression of 22dB at the WLAN band. The size/volume of the fabricated LTCC dual-band UWB filter was 3.65x2.35x0.65 (H)mm<SUP>3</SUP>.

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