Switchable frequency response microwave filter

Details Switchable frequency response microwave filter Switchable frequency response microwave filter

2011-03-29

2011-03-29

Lee, Benny (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S235000

Reexamination Certificate

active

07915979

ABSTRACT:
The present invention discloses a switchable frequency response microwave filter, which uses voltage-controlled varactors to attain the separation or combination of the odd mode and even mode of signals in a dual-mode ring resonator to realize a bandpass or bandstop function and then controls the frequency response of the output filtered signals. Further, the present invention integrates different circuit architectures having bandpass and bandstop functions into a single circuit to reduce the complexity of the circuit.

REFERENCES:
patent: 5406238 (1995-04-01), Suzuki
patent: 5659274 (1997-08-01), Takahashi et al.
L. Dussopt and G. Rebeiz, “Intermodulation distortion and power handling in RF MEMS switches, varactors and tunable filters,” IEEE Trans. Microw. Theory Tech., vol. 51, No., 2003.
K. Entesari and G. Rebeiz, “A 12-18-Ghz three-pole RF MEMS tunable filter,” IEEE Trans. Microw. Theory Tech., vol. 53, No. 8, pp. 2566-2571, Aug. 2005.
S. J. Park, K. Y. Lee, G. Rebeiz, “Low-loss 5.15-5.70-GHz RF MEMS switchable filter for wireless Lan applications,” IEEE Trans. Microw. Theory Tech., vol. 54, No. 11, pp., 2006.
C. T. C. Nguyen, “Intergrated micromechanical circuits for RF front ends,” in Proc. European Solid-State Circuits Conference, Sep. 2006, pp. 7-16.
W. D. Yan, R. R. Mansour, “Tunable dielectric resonator bandpass filter with ebedded MEMS tuning elements”, IEEE Trans. Microw. Theory Tech., vol. 55, No. 1, pp. 154-160, 2006.
J. H. Park, S. Lee, J. M. Kim, H. T. Kim, Y. Kwon, Y. K. Kim, Reconfigurable millimeter-wave filters using CPW-based periodic structures with novel multiple-contact MEMS, 2005.
M. Makimoto and M. Sagawa, “Varactor tuned bandpass filters using microstrip-line ring resonators,” in IEEE MTT-S Int. Microwave Symp. Dig., Jun. 2, 1986, pp. 411-414.
C. Lugo and J. Papapolymerou, “Dual-mode reconfigurable filter with asymmetrical transmission zeros and center frequency control,” IEEE Microw. and Wireless Components Let, 2006.
I. Awai, “General theory of a circular dual-mode resonator and filter,” IEICE Trans. Electron., vol. E81-C, No. 1, pp. 1575-1763, Nov. 1998.
B. T. Tan, S. T. Chew, M. S. Leong, and Ooi, “A dual-mode bandpass filter with enhanced capacitive perturbation,” Trans. Microw. Theory Tech., vol. 51, No. 8 pp. 1906-1910, 2003.
M. F. Lei and H. Wang, “An analysis of miniaturized dual-mode bandpass filter structure using shunt capacitance perturbation,” IEEE Trans. Microw. Theory Tech., vol. 53, 2005.
A. Görür, Description of coupling between degenerate modes of a dual-mode microstrip loop resonator using a novel perturbation arrangement and its dual-mode bandpass fi, 2004.
H. Yabuki, M. Sagawa, M. Matsuo, and M. Makimoto, “Stripline dual-mode ring resonators and their applications to microwave devices,” IEEE Trans. Microw. Theory Tech., vo, 1996.
M. Matsuo, H. Yabuki, and M. Makimoto, “Dual-mode stepped-impedance ring resonator for bandpass filter applications,” IEEE Trans. Microw. Theory Tech., vol. 49, No. 7 pp, 2001.
S. W. Fok, P. Cheong, K. W. Tam and R. P. Martins, A novel microstrip square-loop dual-mode bandpass filter with simultaneous size reduction and spurious response suppr, 2006.
J. T. Kuo and C. Y. Tsai, “Periodic stepped-impedance ring resonator(PSIRR) bandpass filter with miniaturized area and desirable upper stopband characteristics,” IEEE Tr, 2006.
Y. H. Jeng, S. F. Chang, Y. M. Chen, and Y. J. Huang, “A novel self-coupled dual-mode ring resonator and its applications to bandpass filters,” IEEE Trans. Microw. Theor, 2006.

Affiliated with

Also associated with

Rating

Switchable frequency response microwave filter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switchable frequency response microwave filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switchable frequency response microwave filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2650956