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Suppression of Parasitic Resonance Modes for the Millimeter-Wave SiP Applications  

Lee Young-Chul (Division of Marine Electronics and Communication, Mokpo National Maritime University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.17, no.9, 2006 , pp. 883-889 More about this Journal
Abstract
In this paper, parasitic resonance modes generated in a conductor backed coplanar wave guide(CBCPW) and stripline band pass filter(BPF) and the oscillation phenomena of a 40 GHz power amplifier module(PAM) are analyzed and several methods to suppress them are presented for low-temperature co-fired ceramic(LTCC) based millimeter-wave RF System-in-Package(SiP) applications. Parasitic rectangular wave guide(RWG) modes of the CBCPW structure are completely suppressed in the operation frequency band by decreasing the distance between its vias and by increasing the mode frequency. In the stripline structure, RWG resonance modes are clearly eliminated by removing some vias facing each other and by placing them diagonally. In the case of the 40 GHz PAM, in order to reduce a cross talk due to radiation that is generated from interconnection discontinuities, high isolation structures such as embedded DC bas lines and CPW signal lines are used and then the oscillated PAM is improved.
Keywords
Unwanted Resonance; Rectangular Wave Guide; Parallel Plate Leakage(PPL); LTCC; SiP;
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