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A Ka-band narrow bandpass filter using LTCC technology

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3 Author(s)
Choi, B.G. ; Sch. of Eng., Inf. & Commun. Univ., Daejeon, South Korea ; Stubbs, M.G. ; Park, C.S.

A Ka-band low-temperature co-fired ceramic (LTCC) narrow bandpass filter (BPF) is presented first. This BPF shows a very narrow 3 dB fractional bandwidth of 4.5% centered at 28.7 GHz. The advantages of multilayered LTCC technology such as high integration and vertical stacking capabilities were employed to design a three-dimensional interdigital end-coupled embedded microstrip narrow BPF. The difficulties in controlling the precise distance between two adjacent resonators in LTCC end-coupled BPF were overcome by locating the resonators on different layers. The measured insertion loss is 3 dB at 28.7 GHz.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:13 ,  Issue: 9 )