A growing amount of attention has been placed on the effective use of radio frequency (RF) waves for energy harvesting integrations of RFID with wireless communication systems and Internet of Things (IoT) applications. This work investigates multi-band energy harvesting utilizing a monopole antenna, with a specific concentration on three different frequency bands. The monopole antenna provides adjustable performance in a variety of frequency ranges. The monopole antenna has remarkable properties for short-range communication and identification operations in the lower frequency band [840 – 960 MHz], devoted to NRFID (Near field radio frequency identification) deployment. The energy harvesting circuit uses the middle-frequency band [2.4 GHz], to transform the antenna’s radio frequency waves into electrical energy. This energy-collecting feature is very promising for IoT nodes, sensors, and low-power devices. A wide range of wireless communication applications are supported by the antenna’s ability to transmit and receive data across long distances, as evidenced by the higher frequency band [4 – 4.7 GHz] that is set aside for data communication. The radiation pattern and the antenna’s gain at frequencies of 2.4 GHz and 4.3 GHz is 3.040 dB and 3.464 dB. To evaluate the antenna’s performance in RFID applications, the power conversion efficiency is calculated. With the use of a rectifier, the designed antenna has produced a 50% efficiency.