Slot Radial Array Design on Hollow Pyramidal Microwave Absorber

Abstract

This paper will introduce the new technique to design new type of microwave absorber. Microwave absorbers are used in anechoic chamber to diminish the unwanted RF signal, so that the measurement obtain have perfect and good results. The basic theories of slot antenna combining with the theory of microwave absorber are used in this paper. As a result of studies, the new design called as the slot radial array design on hollow pyramidal microwave absorber. The design of pyramidal microwave absorber and the slot was introducing in this paper. The simulation process was done by using CST software. The new design of the absorber was measured to make sure it can be compared in terms of the performance. Lastly, the performance of new slot radial array design pyramidal microwave absorber will be analysed by identifying the characteristics performance. The Slot Radial Array proved to be as one of the way to improve the performance.

Absorption performance of biomass hollow pyramidal microwave absorber using multi-slot array technique

“…The results show that the maximum absorption performance of multiple horizontal slots and multiple vertical slots is -30.62 dB and 46.78 dB respectively. According to the previous researchers, a noteworthy finding is that the innovative methodology of slot radial array design on pyramidal microwave absorber is demonstrated to improve the absorption performance [9]. The absorption performance of pyramidal microwave absorber with slotted design is enhanced from -10.3 dB to -11.8 dB.…”

“…The common way of fulfilling the impedance requirement is to adjust the permittivity and permeability values to be closed to each other. The absorbing performances can also be improved by modifying the absorber design using various approaches such as slot array, multi-layer gradient structure, periodic structure and others [9], [11], [17].…”

Effect of Slot Array at Different Angles towards the Performance of Hollow Pyramidal Microwave Absorber

“…Prior to the experimental design, the resistivity must be considered to ensure that the material is in a semiconductor state. In order to achieve the best result, the value of resistivity must be closed to 1MΩ [18]. This is the value to obtain semiconductor material.…”

“…Both slots array designs are compared to each other to analyze the significant absorption performance different throughout the frequency bands. In the literatures, there are researchers stated that the slot radial array was found to be one of the method to improve the reflectivity performance [18]. Therefore, it is expected that a single slot design should offered better performance than non-slot design on hollow pyramidal absorber.…”