This paper presents an overview of the state-of-the-art of hybrid mode-matching (MM)/finite-
element (FE)/method-of-moments (MoM)/finite-difference (FD) techniques applied for the …

The authors present an overview of tunable microwave and millimeter-wave bandpass filters
realized in different technologies. Some general design principles are described. Recent …

This article describes the historical evolution, and its theoretical and technological features
of waveguide filters. All-metal waveguide filters have been widely used in satellite payloads …

Waveguide E-plane filters with all-metal inserts are designed by a procedure based on the
reflection coefficients of axial inductive strips. The scattering matrix, representing the junction …

A new class of E-plane filters based on cross-coupled resonators or over-moded cavities is
introduced. The filters exhibit pseudoelliptic transfer functions with steep attenuation slopes …

A variety of quasi-planar low-pass, bandpass, and bandstop filters suitable for millimeter-
wave applications is reviewed. The emphasis is on ladder-shaped E-plane bandpass filters …

A compact narrow-wall multiple-slot coupler suitable for inexpensive and very accurate
metal-etching manufacturing techniques is proposed and optimized. A computer-aided …

A unified multimodal variational formulation is described for the characterization of uniaxial
waveguide discontinuities. A variational form is obtained by using a self-adjoint susceptance …

The overall field theory designs of two types of quasi-planar millimeter-wave multiplexers
utilizing low-cost, low-insertion-loss printed metallic E-plane filters are described. Very …

Optimum stepped transformers from rectangular waveguide to ridged and all-metal finned
waveguides are designed with the method of field expansion into eigenmodes, which …