Field-Based Waveguide Filter Synthesis in the Time Domain

Authors: Sallier A.1; Bornemann J.2; Hoefer W.J.R.2

Source: AEÜ – International Journal of Electronics and Communications, Volume 57, Number 2, April 2003 , pp. 119-127(9)

Publisher: Urban & Fischer

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Abstract:

Computer modeling of components and systems has revolutionized engineering design. Yet, most computer-aided design (CAD) approaches follow the strategy employed in traditional practice: an initial model, created with empirical or approximate rules, is tested (analyzed) and modified (optimized) until it meets specifications. The key concept in this CAD approach is thus the efficient combination of numerical analysis with an optimization strategy. In this paper we explore a new approach to electromagnetic design of waveguide filters and aim at creating an alternative design methodology. The main idea consists in exploiting the intrinsic optimization capability of electromagnetic fields to minimize energy storage and losses, not by means of a variational formulation, but by exploiting the topology of three-dimensional standing wave pattern created in space. This new field synthesis approach relies on time-domain modeling of electromagnetic fields and employs the Transmission-Line Matrix (TLM) modeling method. After a theoretical introduction to the synthesis methodology we describe a step-by-step synthesis of an iris-coupled rectangular waveguide bandpass filter and verify the result by performing a rigorous field analysis of the synthesized topology.

Keywords: Field synthesis; Waveguide filters; Time domain modeling; Optimal design

Language: English

Document Type: Original article

DOI: 10.1078/1434-8411-54100150

Affiliations: 1: Electronics and Communications Systems, INSA, 35043 Rennes, France 2: Department of Electrical and Computer Engineering, University of Victoria, Victoria, BC, Canada V8W 3P6

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