Inline cross-coupled coaxial cavity filter

Details Inline cross-coupled coaxial cavity filter Inline cross-coupled coaxial cavity filter

2009-07-31

2011-12-27

Ham, Seungsook (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S206000, C333S207000

Reexamination Certificate

active

08085118

ABSTRACT:
An inline microwave bandpass filter where cross coupling between non-adjacent resonators is realized by changing the orientation of selected resonators. The microwave bandpass filter includes a cavity and three or more resonators arranged in a row (or inline) in the cavity. At least one resonator has a different spatial orientation from at least one other resonator. For example, one or more of the resonators may be rotated 90 or 180 degrees with respect to one of the other resonators. This arrangement of resonators facilitates sequential coupling between pairs of adjacent resonators and cross coupling between at least one pair of non-adjacent resonators without the use of additional cross coupling structures such as dedicated coupling probes or extra cavities. One or more plates may be introduced between adjacent resonators to independently control the sequential and cross coupling.

REFERENCES:
patent: 4642591 (1987-02-01), Kobayashi
patent: 5012210 (1991-04-01), Marconi et al.
patent: 5495216 (1996-02-01), Jachowski
patent: 5608363 (1997-03-01), Cameron et al.
patent: 5812036 (1998-09-01), Estrada
patent: 6861928 (2005-03-01), Okazaki et al.
patent: 7057480 (2006-06-01), Pance et al.
patent: 7777593 (2010-08-01), Weitzenberger
patent: 2003/0197577 (2003-10-01), Hershtig
patent: 2007/0296529 (2007-12-01), Zhang et al.
patent: 1174944 (2002-01-01), None
patent: 2005045985 (2005-05-01), None
European Search Report dated Nov. 11, 2010, corresponding to Application No. 10171274.3.
R.J. Cameron, General Coupling Matrix Synthesis Methods for Chebyshev Filtering Functions, IEEE Transactions on Microwave Theory and Techniques, Apr. 1999, pp. 433-442, vol. 47, Issue 4.
J.B. Thomas, Cross-Coupling in Coaxial Cavity Filters—A Tutorial Overview, IEEE Transactions on Microwave Theory and Techniques, Apr. 2003, pp. 1368-1376, vol. 51, Issue 4, Part 2.
J.D. Rhodes and R.J. Cameron, General Extracted Pole Synthesis Technique with Application to Low-Loss TE011 Mode Filters, IEEE Transactions on Microwave Theory and Techniques, Sep. 1980, pp. 1018-1028, vol. 28, Issue 9.
S. Amari and G. Macchiarella, Synthesis of Inline Filters With Arbitrarily Placed Attenuation Poles by Using Nonresonating Nodes, IEEE Transactions on Microwave Theory and Techniques, Oct. 2005, pp. 3075-3081, vol. 53, Issue 10.
M.E. Sabbagh, K.A. Zaki, H. Yao, and M. Yu, Full-Wave Analysis of Coupling Between Combline Resonators and Its Application to Combline Filters With Canonical Configurations, IEEE Transactions on Microwave Theory and Techniques, Dec. 2001, pp. 2384-2393, vol. 49, Issue 12.
R.W. Rhea, HF Filter Design and Computer Simulation, 1995, pp. 321-326, McGraw-Hill, Inc.
R.J. Cameron, C.M. Kudsia and R.R. Mansour, Microwave Filters for Communication Systems: Fundamentals, Design and Applications, 2007, pp. 507-509, John Wiley & Sons, Inc.
H. Yao, K.A. Zaki, A.E. Atia, and R. Hershtig, Full Wave Modeling of Conducting Posts in Rectangular Waveguides and Its Applications to Slot Coupled Combline Filters, IEEE Transactions on Microwave Theory and Techniques, Dec. 1995, pp. 2824-2830, vol. 43, Issue 12.
C. Wang, H. Yao, K.A Zaki, and R.R. Mansour, Mixed Modes Cylindrical Planar Dielectric Resonator Filters with Rectangular Enclosure, IEEE Transactions on Microwave Theory and Techniques, Dec. 1995, pp. 2817-2823, vol. 43, Issue 12, Part 2.
M.A. Ismail, D. Smith, A. Panariello, Y. Wang and M. Yu, EM-Based Design of Large-Scale Dielectric-Resonator Filters and Multiplexers by Space Mapping, IEEE Transactions on Microwave Theory and Techniques, Jan. 2004, pp. 386-392, vol. 52, Issue 1, Part 2.

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