The compact X-band AIA for MPT with a GaAs MMIC on a multi-layer substrate

A compact X-band active integrated antenna (AIA) for microwave power transmission with a amplifier on a multilayer substrate was fabricated. The amplifier with a GaAs monolithic microwave integrated circuit (MMIC) in an RF via package was integrated in the antenna. A copper plate for ground and heat dissipation was sandwiched between the substrate. The far-field measurement confirmed a equivalent isotropic radiated power (EIRP) of 21.05 dBm, which was calculated by a 27.72 dBi antenna gain included in MMIC amplifier gain in the forward direction. In addition, the gain compression was confirmed at a higher RF power than a −6.67dBm input.