Dielectric resonator, and dielectric filter and multiplexer using same

A dielectric filter comprising:

• a multilayer body with a cuboidal shape and including a plurality of dielectric layers;
• a first plate electrode and a second plate electrode in the multilayer body, the first plate electrode and the second plate electrode being spaced apart from one another in a lamination direction of the multilayer body;
• a plurality of resonators between the first plate electrode and the second plate electrode, the plurality of resonators extending in a first direction orthogonal or substantially orthogonal to the lamination direction;
• a first shield conductor and a second shield conductor respectively located on a first lateral surface and a second lateral surface in the multilayer body, the first lateral surface and the second lateral surface being orthogonal or substantially orthogonal to the first direction, the first shield conductor and the second shield conductor being connected to the first plate electrode and the second plate electrode;
• and
• a first connecting conductor connecting a first resonator included in the plurality of resonators to the first plate electrode and the second plate electrode;
• wherein
• the plurality of resonators are arranged side by side in a second direction orthogonal or substantially orthogonal to both of the lamination direction and the first direction in the multilayer body;
• first ends of the plurality of resonators are connected to the first shield conductor;
• second ends of the plurality of resonators are spaced away from the second shield conductor;
• and
• a diameter of the first connecting conductor inside the first resonator is smaller than a diameter of the first connecting conductor outside the first resonator.