Polar dielectric filter and dielectric duplexer incorporating same

一种包括三个同轴介质谐振器其每一个包括以介质构件的形式的主体，该主体构成有通过其相反端面延伸的通孔，主体具有提供在其外周边表面上的外导体层和在限定通孔的其内表面上的内导体层。这些谐振器与用作连接表面的每个谐振器的外周边表面的一侧相互连接。每个谐振器具有与外导体层绝缘和提供在其外周边表面的上部分而不是连接表面的电极。这些谐振器的电极用导体构件连接在一起。 A polar band-pass dielectric filter including three coaxial dielectric resonators each including a main body in the form of a dielectric member, the main body being formed with a through bore extending through opposite end faces thereof, the main body having an outer conductor layer provided over an outer peripheral surface thereof and an inner conductor layer over an inner surface thereof defining the through bore. The resonators are joined to one another with one side of an outer periphery surface of each resonator serving as a joint surface. Each of the resonators has an electrode insulated from the outer conductor layer and provided at a portion of the outer peripheral surface thereof other than the joint surface. The electrodes of the resonators are connected together by a substantially straight conductor member.