Design of planar slotted waveguide array antennas

In this chapter, we will present Elliott's design procedure for planar standing wave slot arrays including a detailed design example with computed and measured results. For large planar arrays a modification to Elliott's design procedure using an infinite array model is sometimes preferred. Large standing wave arrays can be broken up into sub-arrays with a parallel feed network to improve bandwidth. Important parameters are the total normalised slot conductance of radiating waveguides and the total normalised resistance of feed waveguides. Additional examples of slot array designs will be presented, including a procedure for designing a travelling wave feed to excite radiating waveguides with either standing wave or travelling wave slot arrays. Other design and analysis methods in the literature will also be reviewed.