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AssigneesKyushi University National University Corporation, Fukuoka Industry, Science & Technology Foundation
InventorsKeiji Yoshida, Haruichi Kanaya
Estimating the term…
When an attenuation pole produces, highly-efficient-izing and a miniaturization of a filter are enabled by changing the electric length between a branch point and each filter. The 1st band pass filter 5 that has the characteristics of center frequency f1, and the 2nd band pass filter 7 that has the characteristics of different center frequency f2 from center frequency f1, In co-planer filter 3 provided with transmission line 9 which connects the 1st band pass filter 5 and the 2nd band pass filter 7, and branch point 11 formed in transmission line 9. It is designed so that an attenuation pole may produce in either [at least] the 1st band pass filter 5 or the 2nd band pass filter 7, and the frequency region which the formation position of branch point 11 is adjusted and an attenuation pole produces is adjusted.
A filter characteristic regulation method which can adjust the filter property of the filter which an attenuation pole produces, and a signal can be inputted into said filter via a branch point, or a filter characteristic regulation method which adjusts the frequency region which an output of a signal is possible, adjusts the electric length of the transmission line from said branch point to said filter via said filter to said branch point, and said attenuation pole produces.
A filter characteristic regulator which can adjust the filter property of a filter which an attenuation pole produces, and a signal can be inputted into said filter via a branch point, or a filter characteristic regulator provided with an electric length controller which an output of a signal is possible and adjusts electric length of a transmission line from said branch point to said filter via said filter to said branch point.
A filter characteristic regulator which can adjust the filter property of a filter constituted by plural filter means connected via a branch point, or a filter characteristic regulator which an attenuation pole produced in at least one of said the plural filter means, and was provided with an electric length controller which adjusts electric length of a transmission line from said branch point to said each filter means.
A filter comprising:
A filter provided with a transmission line which at least two of three or more band pass filter means which differ in center frequency characteristics mutually, and said three band pass filter means or more connect, and a branch point formed in said transmission line, or a filter with which a frequency region of said three or more band pass filter means which a formation position of said branch point is adjusted and said attenuation pole produces while being designed so that an attenuation pole may produce in either at least was adjusted.
Dependencies are inferred from the claim text.