Modeling a RF Switch by Multiple Diaphragms in Rectangular Waveguide

Abstract

Twin thick diaphragms cut in the same transverse plane of a rectangular waveguide is modeled as a two port microwave network. The interaction of the diaphragms among themselves is taken care of. The reflection and transmission characteristics of such a network are evaluated by the method of moments. The full wave analysis of single or twin diaphragms separated longitudinally by dielectric material is also presented for the first time in the literature and shown to behave as a RF switch. The theoretical finding is compared with experimental measurements. Means of shifting the switching frequency of the RF switch is also investigated.

Indexing terms:

• RF switch
• Rectangular waveguide
• Moment method