Reduced-Order Optimized Mode-Matching CAD of Microwave Waveguide Components

Passive Microwave Feed-Chains for High-Capacity Satellite Communications Systems

“…The synthesized geometry is then simulated using a full-wave method (e.g. Peverini, 2004). As expected, the computed full-wave response is different from the synthesized polynomial 21 T owing to the neglected phenomena in the synthesis model.…”

“…It should be pointed out that the septum reflection coefficient can even be too high for certain broadband applications. Therefore, open septa can be adopted as first and last discontinuities (Peverini, 2004). More advanced configurations feature ridge waveguide resonators, instead of the common rectangular ones, in order to decrease the overall length of the filter (Goussetis and Budimir, 2001).…”

Model-order reduction techniques for linear electromagnetic problems - an overview

“…A MOR technique based on a mode-matching method (MMM) formulation is derived in [21]. The coupled integralequation technique (CIET) is used to describe the behaviour of a cascade of guiding structures (rectangular waveguides).…”

“…High-order microwave filters having an intricate geometry were analysed exploiting the MOR in [21] and [36]. In [21] a singular-value decomposition algorithm is applied to a MMM formulation (coupled-integral equation) allowing an accurate analysis of waveguide filters, the prediction of metal losses included.…”

An Adaptive Cavity Setup for Accurate Measurements of Complex Dielectric Permittivity

“…The T E 10 mode incident on the rectangular aperture of the 1 mm-thick irises (h i = 63.1 mm, w i = 33.09 mm) excites the modes T E m,n and T M m,n with odd m. Moreover, the partially filled waveguide (PFW) couples the modes of the rectangular waveguide, therefore a complete multimode description of the irises is necessary. The relevant GSM has been obtained by the coupled integral equation technique (CIET) [16]. The metal losses are introduced in the model by means of an equivalent metal resistivity equal to 0.1 µΩm.…”