Performance enhancement of microwave absorbers using triangular slot configurations geopolymer ceramic pyramidal structures

A microwave absorber is essential in an anechoic chamber to simulate a free space environment by eliminating reflections, thereby enabling accurate testing of electronic devices. This project introduces a novel method for designing advanced microwave absorbers, specifically focusing on the absorption performance of geopolymer ceramic hollow pyramidal absorbers featuring triangular slots. These slots vary in size, array configuration, and pattern were found to influence absorption performance differently, indicating that geometric parameters play a crucial role in optimizing absorption. The absorbers, constructed with a square base measuring 20 cm by 20 cm and a height of 40 cm, are coated with a geopolymer ceramic material. The triangular slots are strategically integrated to improve the absorption performance compared to the original non-slotted design. The fabrication of precise triangular slot geometries remains a major challenge, as ensuring accurate alignment and material consistency.