APPROACHES TO MINIATURIZATION AND EXPERIMENTAL IMPLEMENTATION OF A FLEXIBLE ANTENNA WITH A COPLANAR INPUT / OUTPUT OF A SIGNAL FOR OPERATION IN THE ISM-BAND
Interest in the study of flexible electronics devices is due to the need for their application in a wide range of applications, such as telecommunications, medicine, security, various sensors, and wearable devices. The trend towards expanding the functionality of flexible electronics inevitably comes down to the requirements of miniaturization, which in turn entails the presentation of such requirements for flexible antennas. Therefore, the miniaturization of flexible antennas is an important direction in modern communication systems. The purpose of this study is to develop and experimentally implement a compact antenna design using known approaches to miniaturization of microstrip structures no larger than 30 × 30 mm on a flexible dielectric polyimide substrate for operation in the ISM and cellular ranges. The starting point was a 120 × 40 mm antenna, which demonstrated an operating range from 1.5 to 3.5 GHz. The result of numerical modeling, optimization, and miniaturization in the ANSYS Electronics Suite environment is a compact three-band antenna 30 × 20 mm in size, for which the results of the study of the frequency dependence of the reflection coefficient were obtained, and the directional patterns were plotted. Using the laser ablation method, a series of experiments was carried out to fabricate a sample of the designed antenna, and the radio-frequency characteristics were experimentally investigated. Comparison of the numerical simulations and experimental results showed good qualitative and quantitative agreement. In the future, we are going to experimentally implement the technique for measuring the radiation pattern of the manufactured antenna samples.
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Ivan A. Chistyakov
Saratov State University, SC «RPE «Almaz»
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