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Title:
TUNABLE FERROELECTRIC FILTER
Document Type and Number:
Japanese Patent JP2008035569
Kind Code:
A
Abstract:

To provide an enhanced tunable f-e filter capable of providing a tunable range higher than a desired frequency domain through low I. L. and out-of-high-band rejection, and a method of designing the filter.

The present invention quantifies and reduces losses in tunable bandpass filters having ferroelectric capacitors. Given a required insertion loss and the Q factor of a resonator, the geometric losses resulting from a particular topology for the ferroelectric capacitor and the metal losses are accounted for to quantify the allowable ferroelectric losses.


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Inventors:
TONCICH STANLEY SLAVKO
Application Number:
JP2007273222A
Publication Date:
February 14, 2008
Filing Date:
October 19, 2007
Export Citation:
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Assignee:
KYOCERA WIRELESS CORP
International Classes:
H01G4/12; H01P1/203; G01R27/26; H01G4/33; H01G4/40; H01G7/06; H01P1/20; H01P1/205; H01P1/213; H01P7/08; H01Q1/38; H01Q3/44; H01Q9/04; H01Q9/14; H01Q9/16; H01Q9/28; H01Q9/30; H01Q13/08; H03B5/08; H03B5/12; H03B5/18; H03F1/56; H03F3/191; H03H7/20; H03H7/38; H03J5/24; H03L1/02; H03L7/18; H04B1/30; H04B1/40; H04L27/38; H03H7/01; H03H7/12
Domestic Patent References:
JPH10209714A1998-08-07
JPH10335903A1998-12-18
JP2000059104A2000-02-25
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita



 
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