Wave transmission lines and networks – Coupling networks – Balanced to unbalanced circuits
Reexamination Certificate
2006-10-03
2006-10-03
Takaoka, Dean (Department: 2817)
Wave transmission lines and networks
Coupling networks
Balanced to unbalanced circuits
C333S026000, C333S100000
Reexamination Certificate
active
07116185
ABSTRACT:
A balun comprises an unbalanced terminal, two balanced terminals, and two ground terminals. The balun further comprises: a low-pass filter provided between the unbalanced terminal and one of the balanced terminals; and a high-pass filter provided between the unbalanced terminal and the other of the balanced terminals. The low-pass filter incorporates two coils and a capacitor. The high-pass filter incorporates two capacitors and a coil. The coils and the capacitors are made up of conductor layers of a multi-layer substrate.
REFERENCES:
patent: 5949299 (1999-09-01), Harada
patent: 6052039 (2000-04-01), Chiou et al.
patent: 6285273 (2001-09-01), Morikawa
patent: 6850127 (2005-02-01), Sakakura et al.
patent: 1 100 193 (2001-05-01), None
patent: 917 372 (1947-01-01), None
patent: 09-260145 (1997-10-01), None
patent: 10-200360 (1998-07-01), None
patent: 2000-188218 (2000-07-01), None
patent: 2002-190413 (2002-07-01), None
Chiou et al.; “Lumped-Element Compensated High/Low-Pass Balun Design for MMIC Double-Balanced Mixer”; IEEE Microwave and Guided Wave Letters; vol. 7, No. 8; pp. 248-250; XP 000658633; Aug. 1997.
Penunuri et al.; “RF Filter Design Using LTCC and Thin Film Baw Technology”; 2001 IEEE Ultrasonics Symposium; pp. 273-278; XP 010584525; Oct. 7, 2001.
Rothammel; “Antennenbuch, 10. Auflage”; Kapitel 6 and 7, Franckh-Kosmos Verlag, Stuttgart; Germany; XP 002321146; with partial translation.
Parisi; “180 Degrees Lumped Element Hybrid”; Microwave Symposium Digest; IEEE MTT-S International; vol. 3, pp. 1243-1246; XP 010085524; Jun. 13, 1989.
Scrantom et al.; “LTCC Technology: Where We are and Where We're Going-II”; Technologies for Wireless Applications; pp. 193-200; XP 010326263; Feb. 21, 1999.
Matsubara Hideya
Ohi Shoichi
Ohyama Naoto
Oliff & Berridg,e PLC
Takaoka Dean
TDK Corporation
LandOfFree
Balun does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Balun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Balun will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3659410