Microstrip arrays
A single microstrip antenna utilizing an air dielectric substrate (εr ≈ 1) is able to provide a maximum gain of nearly 10 dBi. When larger gain is required, and a microstrip antenna solution is the best choice, a number of microstrip elements may be connected together to form an array of antennas. The array of elements provides a much larger effective aperture and therefore gain compared to a single microstrip element. This Chapter will discuss elementary methods used to design microstrip antenna arrays.
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