Dielectric waveguide resonator and dielectric waveguide filter

A dielectric waveguide filter comprising:

• a dielectric waveguide resonator including:
• a dielectric plate including a first principal surface and a second principal surface facing each other and a side surface connecting an outer edge of the first principal surface and an outer edge of the second principal surface;
• a first surface conductor at the first principal surface;
• a second surface conductor at the second principal surface;
• and
• a connection conductor inside the dielectric plate and connecting the first surface conductor and the second surface conductor;
• wherein
• the dielectric waveguide filter includes an internal conductor inside the dielectric waveguide resonator, extends in a perpendicular direction to the first principal surface, and is electrically connected to neither the first surface conductor nor the second surface conductor.

A dielectric waveguide filter comprising:

• a plurality of dielectric waveguide resonators each including:
• a dielectric plate including a first principal surface and a second principal surface facing each other and a side surface connecting an outer edge of the first principal surface and an outer edge of the second principal surface;
• a first surface conductor at the first principal surface;
• a second surface conductor at the second principal surface;
• and
• a connection conductor inside the dielectric plate and connecting the first surface conductor and the second surface conductor;
• and
• a main coupling portion coupling adjacent dielectric waveguide resonators of the plurality of dielectric waveguide resonators;
• wherein
• each of one, some, or all of the plurality of dielectric waveguide resonators includes an internal conductor inside the dielectric waveguide resonator, extends in a perpendicular direction to the first principal surface, and is electrically connected to neither the first surface conductor nor the second surface conductor.