| 摘要 |
PROBLEM TO BE SOLVED: To obtain the filter which facilitates the adjustment of coupling or the like and is easy to design by connecting resonators, i.e., microstrip lines by transmission lines. SOLUTION: The dielectric filter is equipped with the transmission lines, which each have one end grounded and the other end made open, on a dielectric substrate; and input/output-side transmission lines are connected to input/output electrode patterns and at least two transmission lines are connected by a conductor pattern. For example, this dielectric filter has more than one parallel strip lines 11 and 12 formed on the top surface of an electrically conductive substrate 10 and connected to input/output conductor patterns 13 and 14. The conductor strip lines 11 and 12 each have one end as a short terminal which extends to the end surface of the substrate 10 and is connected as an earth conductor and the other end as an open end which does not reach the end surface of the substrate 10. Then the conductor strip lines 11 and 12 are connected by a conductor pattern 15 and thus coupled together.
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