Thin-Film High-Rejection Filter Integration in Low-Loss Organic Substrate

This paper presents thin-film high-rejection bandpass filters integrated into organic substrate technology called RXP. A circuit topology based on unique resonator and grounding inductor is proposed. The proposed circuit provides design freedom of locating transmission zeros at lower and upper stopbands relative to the center frequency. About 2.4 GHz narrow band <formula formulatype="inline"><tex Notation="TeX">$({<}{\rm 200}~{\rm MHz})$</tex></formula> and 5 GHz wide band <formula formulatype="inline"><tex Notation="TeX">$({>}{1}~{\rm GHz})$</tex> </formula> bandpass filters have been implemented in four-metal layer with 0.191 mm thin RXP substrate. The measured results show good agreement with simulations.

[1]  V. Sundaram,et al.  Ultra high Q embedded inductors in highly miniaturized family of low loss organic substrates , 2008, 2008 58th Electronic Components and Technology Conference.

[2]  R. Tummala.  Introduction to System-On-Package (SOP): miniaturization of the entire system / Rao R. Tummala, Madhavan Swaminathan , 2008 .

[3]  Extraction of material properties for low-K and low-loss dielectrics using cavity resonator and efficient finite difference solver up to 40GHz , 2008, 2008 Electrical Design of Advanced Packaging and Systems Symposium.

[4]  Jr. R. Wyndrum.  Microwave filters, impedance-matching networks, and coupling structures , 1965 .

[5]  Bo Yuan,et al.  A compact quasi-lumped LTCC band pass filter for C-band wireless application , 2008, 2008 International Conference on Microwave and Millimeter Wave Technology.

[7]  W. Yun,et al.  High-Q Embedded Passives on Large Panel Multilayer Liquid Crystalline Polymer-Based Substrate , 2007, IEEE Transactions on Advanced Packaging.

[8]  Ke-Li Wu,et al.  A compact second-order LTCC bandpass filter with two finite transmission zeros , 2003 .

[9]  M. Swaminathan,et al.  Design and fabrication of integrated RF modules in liquid crystalline polymer (LCP) substrates , 2005, 31st Annual Conference of IEEE Industrial Electronics Society, 2005. IECON 2005..

[10]  Jae-Young Lee,et al.  5.2GHz band 2nd-order band-pass filter using LTCC multi-layer technology , 2005, 2005 Asia-Pacific Microwave Conference Proceedings.

[11]  Ching-Wen Tang,et al.  Development of Multilayered Bandpass Filters With Multiple Transmission Zeros Using Open-Stub/Short-Stub/Serial Semilumped Resonators , 2010, IEEE Transactions on Microwave Theory and Techniques.

[12]  Madhavan Swaminathan,et al.  RF design methodology for design-cycle-time reduction using parameterization of embedded passives on multilayer organic substrates , 2008, 2008 IEEE MTT-S International Microwave Symposium Digest.

[13]  G. Ponchak,et al.  Characterization of liquid crystal polymer (LCP) material and transmission lines on LCP substrates from 30 to 110 GHz , 2004, IEEE Transactions on Microwave Theory and Techniques.

[14]  V. Venkatakrishnan,et al.  Characterization of Next Generation Thin Low-K and Low-Loss Organic Dielectrics From 1 to 110 GHz , 2010, IEEE Transactions on Advanced Packaging.

[15]  Madhavan Swaminathan,et al.  A compact third-order 5 GHz bandpass filter with enhanced stopband characteristics in ultra thin organic substrate , 2010, 2010 IEEE Radio and Wireless Symposium (RWS).

[16]  Ching-Wen Tang,et al.  Harmonic-suppression LTCC filter with the step-impedance quarter-wavelength open stub , 2004 .

[17]  S.-F.R. Chang,et al.  A high stopband-rejection LTCC filter with multiple transmission zeros , 2006, IEEE Transactions on Microwave Theory and Techniques.