Abstract
The propagation and loss characteristics of the substrate-integrated rectangular waveguide (SIRW) at microwave and millimeter wave bands have been investigated. The results have shown that the substrate-integrated rectangular waveguide has nearly the same glide wave characteristics as conventional rectangular waveguide; it can be analyzed as a rectangular waveguide with effective width of the SIRW. The insertion loss of SIRW and its equivalent rectangular waveguide agree well with each other. However, at some bands, it has been observed that the derivation of the propagation characteristics of the SIRW and its equivalent rectangular waveguide has shown the frequency dependency.
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