Abstract
A broadband right-angle rectangular waveguide to substrate integrated waveguide transition for hybrid RWG-SIW (rectangular waveguide–substrate integrated waveguide) feeding networks is presented. The narrower return loss bandwidth issue with respect to in-line configurations is addressed with the introduction of a multi-section matching network consisting of a number of symmetric E-plane irises in the rectangular waveguide section. A hybrid design procedure based on circuit simulation and full-wave optimization is outlined and adopted to synthesize three matching networks with respectively one, two, and three irises, according to the bandwidth to be covered. The design procedure is experimentally validated with a proof-of-concept prototype.
Highlights
A high-gain pencil beam radiation pattern, often required in satellite communications and radar systems, can be synthesized by large planar arrays
This can be made of planar circuits such as substrate integrated waveguides (SIWs), grounded coplanar waveguides (GCPWs) or quasi-planar structures such as air-filled rectangular waveguides (RWGs), connected together with low-loss transitions
In hybrid feeding networks both the SIW and RWG technologies are employed, a broadband and low-loss transition is necessary in order to connect the two transmission lines
Summary
A high-gain pencil beam radiation pattern, often required in satellite communications and radar systems, can be synthesized by large planar arrays. In hybrid feeding networks both the SIW and RWG technologies are employed, a broadband and low-loss transition is necessary in order to connect the two transmission lines. In hybrid feeding networks both the SIW and RWG technologies are employed, a with waveguide tapers and exhibit wide bandwidths at the expense of bulky volumes, making this broadband and low-loss transition is necessary in order to connect the two transmission lines. The coupling aperture comes insubarraying the form of single slotscenario in [12],ofwhich designed tile architecture For these reasons, right-angle transitions may required.behavior, Such configurations to slotted waveguide theory. Performance can be obtained when the device is designed to an E-plane waveguide bend: In this paper a novel right-angle RWG-to-SIW transition is presented, which makes.
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