volume | PIER Journals

Abstract

The paper summarizes the principles of various reflectors for microstrip antennas with a particular focus on volumetric reflectors (cavities) that are more challenging to manufacture than flat structures made from printed circuit boards or sheet metal. It is demonstrated in this study that volumetric reflectors can significantly enhance the directional properties of an antenna without typically increasing the antenna's radiating area or overall volume. To reduce the manufacturing costs associated with antenna's volumetric parts, the article proposes the use of 3D printing with commonly available dielectric materials, such as plastics. This technique is relatively straightforward and cost-effective compared to the manufacture of volumetric metal parts. Moreover, the article suggests applying a conductive layer to the parts of the antenna that contribute to radiation formation. The option of covering the reflector (cavity) on the inside with ordinary aluminum foil and the option with conductive enamel are considered. The results of simulation in antenna designs with different reflector conductivities and the results of experimental studies of antennas are presented. The results obtained show that the method is feasible to be used with virtually no compromise on the antenna characteristics and substantially reduces the production cost.

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Mr. Mikhail S. Shishkin