This paper explores the system of radio frequency (RF) energy harvesting (EH) that pursuit of sustainable power generation to feed low power sensors. The proposed system is investigated and optimized the efficiency of RF energy harvesting through designed and implemented of RF-EH system as antenna array and rectifier circuit. The design is used to harvest the radio frequency within wireless communication band as 2.5 and 5.2 GHz for efficient energy extraction. A rectifier circuit state-of-the-art diode technology was integrated to maximize power conversion and storage capabilities. The significant improvement of the proposed system is improved the RF energy harvesting efficiency to increase the power conversion compared to traditional approaches. Experimental validation is done to demonstrate the effectiveness of the proposed antenna array and rectifier design over wide range of frequencies. The significance of this work lies in its potential to revolutionize the field of renewable energy generation. The proposed system paves the way for the integration of RF energy harvesting into various applications, it provides output volt 0.456 and 0.2 V at 2.5 and 5.2 GHz, respectively. The proposed system suitable for wireless sensor networks, Internet of Things (IoT) devices, and wearable electronics.