Recent advancements in biosensors, low-power Internet of Things (IoT) devices, and wireless communication technologies have led to the development of next-generation wireless sensor networks. These networks are gradually more used for monitoring traffic, crops, infrastructure, and health. A Body Area Network (BAN) also known as a Wireless BAN, Body Sensor Network (BSN), or Medical BAN is a high-frequency wireless network composed of wearable computing devices. These devices can be implanted inside the body or carried in various ways, such as in pockets or bags. One major challenge is providing energy to these devices in a way that is safe for the body and environment and does not require frequent replacement. This paper presents a solution by designing a compact and efficient 5G Energy Harvesting System. Our system converts 5G electromagnetic waves into usable energy through a Rectenna, which includes a microstrip antenna operating at 8.75 GHz. The system also features an RF-to-DC half-wave rectifier circuit with an appropriate matching network and a microstrip low-pass filter to reduce noise and enhance efficiency. Mathematical results indicate that the system achieves a maximum power conversion efficiency of 43% with a 20 KΩ load and an input power of 19.54 dBm.