| 摘要 |
PROBLEM TO BE SOLVED: To provide a downsized high frequency filter.SOLUTION: In the high frequency filter, two filter circuits each of which is provided with an external coupling capacitor one end of which is coupled to an input/output terminal; a wavelength reduction capacitor one end of which is coupled to the other end of the external coupling capacitor and the other end of which is coupled to a ground potential; and a resonator, one end of which is coupled to the other end of the external coupling capacitor and one end of the wavelength reduction capacitor, and the other end of which is coupled to the ground potential, that is formed by using a distribution constant line are coupled with an internal coupling capacitor and a broadside coupling of a resonator. |
