| 摘要 |
PROBLEM TO BE SOLVED: To provide a band-pass filter that is provided with a TE01δmode dielectric resonance element, is closely coupled with an external circuit and has an enhanced breakdown voltage characteristic. SOLUTION: The band-pass filter is provided with an outer conductor 2 and n (n is an integer of 3 or over) sets of dielectric resonance elements 11-1n connected in cascade in the outer conductor 2, and the 1st and n-th dielectric resonance elements of the dielectric resonance elements 11-1n are TM01δmode dielectric resonance element and the remaining dielectric resonance element are the TE01δmode dielectric resonance elements.
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