Multi Hole Waveguide is designed for use in radio frequency and microwave systems. It has a circular or rectangular waveguide with multiple holes or apertures beside its length. These apertures are utilized for coupling power into or out of the waveguide that allows it to act as a transmission line. The presented waveguide can be utilized in a range of applications, like radar systems, microwave imaging, and satellite communication. Multi Hole Waveguide is mainly well-suited for usages, needing broadband performance, like in microwave spectroscopy. The size and spacing of the openings are carefully selected based on the required bandwidth and operating frequency.