| 摘要 |
In a method for manufacturing a filter including a plurality of resonators arranged in series, a shape of the resonators and a number of the resonators are determined, so that an amount of additional coupling coefficients between the resonators except for two adjacent ones of the resonators is smaller than a predetermined value. Then, an initial coupling coefficient function is calculated with respect to a distance between two adjacent ones of the resonators, and is set in a coupling coefficient function. Then, coupling coefficients between the resonators are calculated for desired filter frequency responses, and distances between the resonators having the calculated coupling coefficients are calculated in accordance with the coupling coefficient function. Then, a layout of the filter having the resonators with the calculated distances is designed, and a tentative filter is manufactured. Then, it is determined whether or not filter frequency responses of the tentative filter satisfy the desired filter frequency responses. When the filter frequency responses of the manufactured filter satisfy the desired filter frequency responses, actual filters are manufactured by using the layout. Otherwise, the coupling coefficient function is changed, thus repeating the distance calculating step, the layout designing step and the filter frequency responses determining step.
|
