Use of 3D field simulators in the synthesis of waveguide capacitive iris coupled lowpass filters

✍ Scribed by Shi Yin; Protap Pramanick

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 215 KB
• Volume: 10
• Category: Article
• ISSN: 1096-4290
• DOI: 10.1002/(sici)1099-047x(200005)10:3<190::aid-mmce6>3.0.co;2-9

✦ Synopsis

This paper presents the generalized lowpass filter design method of Levy based on three-dimensional electromagnetic analysis and discontinuity modeling using commercially available full-wave electromagnetic simulators. It shows how to use Levy's method for very accurate theoretical design of a waveguide capacitive iris lowpass filter, using modern ( ) 3D EM field-solvers based on the finite element method FEM , the mode matching method ( ) ( ) MM , and the transmission line matrix TLM analysis method. This is the first time that design curves and equations, based on full electromagnetic modeling, have been presented for constant thickness capacitive iris filters. We will demonstrate our approach by designing a number of waveguide capacitive iris filters. This paper also demonstrates the generality of the method. This method can be applied to many other types of waveguide lowpass and bandpass filters.