Slot arrays in special waveguide technologies
In this chapter, we discuss slot arrays in two types of parallel plate waveguides propagating the TEM mode. In the first an electromagnetic wave propagates in the radial direction inward or outward in a circular parallel plate waveguide, while slots cut in one of the parallel plates radiate. Such an array is convenient for large apertures requiring high gain and mass production. The second type has a rectangular shape and propagates the TEM mode. Slots cut in one of the plates radiate. We then present slot arrays in substrate integrated waveguides (SIW) which have a great potential for easy integration with planar devices. Finally slot arrays in gap waveguides are discussed.
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