Resonator, filter, duplexer, and communication apparatus

Details Resonator, filter, duplexer, and communication apparatus Resonator, filter, duplexer, and communication apparatus

2005-09-13

2005-09-13

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S202000, C333S219000, C333S204000

Reexamination Certificate

active

06943644

ABSTRACT:
Ring-shaped resonant elements include respectively conductor lines2a,2b, and2ceach formed on a substrate1along a full one turn of circumferential length of a ring. Each of the conductor lines2a,2b, and2chas two end portions which additionally extend and which are located such that they closely adjoin each other in a width direction. The respective ring-shaped resonant elements are disposed in a concentric fashion. Capacitive parts are formed in areas in which two ends of respective conductor lines are located in close proximity to each other, and the other parts of the respective conductor lines function as inductive parts. Each conductor line operates as a half-wave transmission line whose both ends are electrically open. It is not needed to form a ground electrode on a surface of the substrate opposite to the surface on which the conductor lines are formed. Thus, a resonator can be formed using a very small number of constituent elements. A resonator, a filter, a duplexer, and a communication apparatus having a small size and a high conductor Q-factor can be produced at reasonably low cost.

REFERENCES:
patent: 4641116 (1987-02-01), Shibata et al.
patent: 4721931 (1988-01-01), Nishikawa et al.
patent: 4749963 (1988-06-01), Makimoto et al.
patent: 5055809 (1991-10-01), Sagawa et al.
patent: 5922650 (1999-07-01), Ye
patent: 6122533 (2000-09-01), Zhang et al.
patent: 6486754 (2002-11-01), Hidaka et al.
patent: 6509810 (2003-01-01), Ota et al.
patent: 6538527 (2003-03-01), Hidaka et al.
patent: 6624727 (2003-09-01), Hidaka et al.
patent: 6633207 (2003-10-01), Hidaka et al.
patent: 62-183202 (1987-08-01), None
patent: 62-193302 (1987-08-01), None
patent: 02-096402 (1990-04-01), None
patent: 03-181203 (1991-08-01), None
patent: 09-083219 (1997-03-01), None
patent: 2000-049512 (2000-02-01), None
patent: 2000-244213 (2000-09-01), None
patent: 2001-077609 (2001-03-01), None
patent: 2002-009503 (2002-01-01), None
patent: 2002-009515 (2002-01-01), None
patent: 2002-009516 (2002-01-01), None
Korean Office Action issued Jun. 14, 2005 (w/ English translation).

Affiliated with

Also associated with

Rating

Resonator, filter, duplexer, and communication apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Resonator, filter, duplexer, and communication apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resonator, filter, duplexer, and communication apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3404532