Abstract: A method of manufacturing a ceramic resonator radio frequency filter includes placing one or more first coaxial resonators on a printed circuit board, and placing one or more second coaxial resonators over the one or more first coaxial resonators so that the coaxial resonators are arranged in a stacked configuration on the printed circuit board. The method also includes electrically connecting the one or more first coaxial resonators and second coaxial resonators to the printed circuit board.

Abstract: A method of manufacturing a ceramic resonator radio frequency filter includes placing one or more first coaxial resonators on a printed circuit board, and placing one or more second coaxial resonators over the one or more first coaxial resonators so that the coaxial resonators are arranged in a stacked configuration on the printed circuit board. The method also includes electrically connecting the one or more first coaxial resonators and second coaxial resonators to the printed circuit board.

Abstract: A ceramic resonator radio frequency filter includes a printed circuit board, one or more first coaxial resonators disposed on the printed circuit board, and one or more second coaxial resonators disposed over the one or more first coaxial resonators so that the one or more first coaxial resonators and one or more second coaxial resonators are arranged in a stacked configuration. The one or more first coaxial resonators and second coaxial resonators electrically connected to the printed circuit board.

Abstract: An apparatus for perturbation method electrical permittivity measurements of a sample comprises a waveguide body having a first end, a second end, an upper wall, and a lower wall, a first shorting plug disposed within the waveguide body proximate the first end, a second shorting plug disposed within the waveguide body proximate the second end, a first threaded connector mount attached to the upper wall of the waveguide body at a first position along a length of the waveguide body, a second threaded connector mount attached to the upper wall of the waveguide body at a second position along a length of the waveguide body, and first and second apertures formed centrally in the upper wall and lower wall, respectively, of the waveguide body.

Abstract: A ceramic resonator radio frequency filter includes a printed circuit board, one or more first coaxial resonators disposed on the printed circuit board, and one or more second coaxial resonators disposed over the one or more first coaxial resonators so that the one or more first coaxial resonators and one or more second coaxial resonators are arranged in a stacked configuration. The one or more first coaxial resonators and second coaxial resonators electrically connected to the printed circuit board.

Abstract: A ceramic resonator radio frequency filter includes a printed circuit board, one or more first coaxial resonators disposed on the printed circuit board, and one or more second coaxial resonators disposed over the one or more first coaxial resonators so that the one or more first coaxial resonators and one or more second coaxial resonators are arranged in a stacked configuration. The one or more first coaxial resonators and second coaxial resonators electrically connected to the printed circuit board.

Abstract: An apparatus for perturbation method electrical permittivity measurements of a sample comprises a waveguide body having a first end, a second end, an upper wall, and a lower wall, a first shorting plug disposed within the waveguide body proximate the first end, a second shorting plug disposed within the waveguide body proximate the second end, a first threaded connector mount attached to the upper wall of the waveguide body at a first position along a length of the waveguide body, a second threaded connector mount attached to the upper wall of the waveguide body at a second position along a length of the waveguide body, and first and second apertures formed centrally in the upper wall and lower wall, respectively, of the waveguide body.

Abstract: A ceramic resonator radio frequency filter includes a printed circuit board, one or more first coaxial resonators disposed on the printed circuit board, and one or more second coaxial resonators disposed over the one or more first coaxial resonators so that the one or more first coaxial resonators and one or more second coaxial resonators are arranged in a stacked configuration. The one or more first coaxial resonators and second coaxial resonators electrically connected to the printed circuit board.