Ultra-wideband signals radiation by linear arrays of aperture stacked patch antennas

A low-profile multilayer ultra-wideband microstrip antenna (aperture stacked patch antenna) is investigated as a radiator of ultra-wideband radio pulses with 50% relative bandwidth. Low permittivity materials such as Rogers RO 4003, teflon and foam were used for antenna implementation. Linear antenna arrays designed on the basis of proposed stacked patch elements were investigated. Frequency-domain analysis demonstrated very good array elements matching and negligible mutual coupling. Transient radiated pulses were simulated for different observation angles in the antenna E-plane, energy patterns and fidelity factors are calculated. Time-domain results evidence small radiated pulse degradation and high fidelity factor values for broadside directions.