High frequency common mode choke

Details High frequency common mode choke High frequency common mode choke

1990-05-11

1992-08-11

LaRoche, Eugene R.

Wave transmission lines and networks

Transmission line inductive or radiation interference...

333245, H04B 328

Patent

active

051382873

ABSTRACT:
A choke for reducing common mode signals in high frequency circuits. A microstrip transmission line includes a pair of conductors spaced above a ground plane conductor. In input and output regions the conductors are spaced relatively far apart from each other such that each conductor presents a characteristic impedance that is similar for common mode and for differential mode signals. Between the input and output regions the conductors are located much closes together such that they present different characteristic impedances to common mode and to differential mode signals so as to reflect the common mode signal but not the differential mode signal. In another version a hole in the ground plane beneath the conductors is partially occupied by a conductive island that is coupled to the ground plane through a resistance to absorb the common mode signal rather than reflecting it. Other versions are realized in a pair of parallel coaxial cables and in a coplanar transmission line.

REFERENCES:
patent: 3659228 (1972-04-01), Napoli
patent: 3778759 (1973-12-01), Carroll
patent: 3979699 (1976-09-01), Caragliano et al.
patent: 4121180 (1978-10-01), Greenway
patent: 4222016 (1980-09-01), Stock et al.
patent: 4591812 (1986-05-01), Stegens et al.
patent: 4800344 (1989-01-01), Graham
patent: 4980654 (1990-12-01), Moulton
Weirather, "A Small MIC Coupler With Good Directivity", IEEE Trans. on Microwave Theory & Tech., Jan. 1974, pp. 70-71.
Sekhri, "Power Line Filter", IBM Tech. Discl. Bulletin, vol. 17, No. 7, Dec. 1974, pp. 1998, 1999.
"Classical Electrodynamics", John David Jackson, John Wiley and Sons, Inc., (1967), page 198.
Richard E. Matick, "Transmission Line Pulse Transformers--Theory and Applications", Proceedings of the IEEE, vol. 56, No. 1, Jan. 1968, pp. 47-62.
C. Norman Winningstadt, "Nanosecond Pulse Transformers", IRE Trans. Nuclear Science, vol. NS-6, Mar. 1959, pp. 26-31.
Patent Abstracts for U.S. Pat. No. 4,739,289.

Affiliated with

Also associated with

Rating

High frequency common mode choke does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High frequency common mode choke, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High frequency common mode choke will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-349322