Waveguide antenna with an inverted 3-tiered cake-shaped probe for NB-IoT applications

This article presents the waveguide antenna design with an inverted 3-tiered cake-shaped probe for NB-IoT applications. The primary material of the antenna structure is aluminum, with a thickness of 0.1 mm. By design, the prototype antenna dimension is 20 x 30 mm
²
, with a rectangular waveguide of 140 x 70 x 100 mm
³
to increase the frequency bandwidth and gain. The measurement results of the antenna have resonance frequencies of 2.625 GHz (2.27-2.98GHz) with a gain of 7.89 dBi. The proposed antenna affects the environment in an omnidirectional pattern. Using the CST software, the antenna structure design is an analyzer.