A dielectric waveguide filter with a first solid block of dielectric material covered with a layer of conductive material and defining a plurality of resonators. A first RF signal input/output through-hole is defined in a first end resonator of the plurality of resonators of the first block of dielectric material. A second solid block of dielectric material is coupled to the first solid block of dielectric material. The second block of dielectric material is covered with a layer of conductive material and defines a plurality of resonators including first and second adjacent end resonators separated by an RF signal isolator for preventing the transmission of an RF signal between the first and second end resonators. An RF signal coupling window provides a coupling between the first end resonator of the plurality of resonators of the first block of dielectric material and the first end resonator of the second block of dielectric material whereby the first end resonator of the second block of dielectric material defines a trap resonator.