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An ultra-wideband (6–18 GHz) phased-array antenna with a beam scanning angle of ±28° is proposed. A step-by-step design procedure consisting of beamforming network (BFN), end-launcher feed adapter, and the radiating element is presented. Microstrip Rotman lens has been designed to act as the BFN, and optimized to achieve minimum phase-error over the whole frequency range. In order to satisfy the condition...
Two slot-coupled microstrip lines each with a finite size substrate are located on a distinct side of a large ground plane. They are analyzed using surface equivalence principle and multiple network theory (SEMN). Four-port scattering parameters are calculated and compared with experimental measurements which exhibit good comparison. This analysis is also used to model a slot fed microstrip antenna.
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