Abstract
This work presents a new bendable antenna for worldwide interoperability for microwave access (WiMAX) wireless communication systems. These antennas, transparent and flexible, will be easily integrated into various mdia and in particular OLED lighting which could be part of the public lighting network of tomorrow as well as on all display media. The integration of these antennas as close as possible to the end-user is a possible solution to reduce the energy consumption which goes hand in hand with the increase in the data rate. This kind of new antenna, designed to be integrated in organic light-emitting diode (OLED), was modeled from a transparent VeilShieldTM conductive fabric and was placed on a 100% polyester substrate with a thickness of 1.5 mm and a loss tangent of 0.02. We have tested and evaluated the characteristic parameters of our antenna, namely the reflection coefficient, the radiation pattern and the gain, to find out the performance of our proposed design. The performance of the transparent conductive fabric integrated in the 100% polyester substrate is tested for the application of flexible antenna operating at 3.5 GHz with a gain value of 5.38 dB. We have integrated this proposed new antenna with the OLED light source containing four layers of different materials and electrical properties: aluminum cathode layer, polymer layer, indium tin oxide (ITO) anode layer and glass substrate layer. After integration, the resonant frequency shifted to 3.52 GHz with a gain value of 4.61 dB. In addition, we also tested the concave bending on the reflection coefficient of the proposed flexible antenna taking into account the different bending angles. This work demonstrates the possibility of integrating these unconventional materials used for the proposed antenna within the OLED despite weak effects on the resonant frequency and the gain of the proposed antenna after integration.
Highlights
For several decades and in particular with the appearance of cell phones, integrated antennas have given rise to significant research work
The performance of the transparent conductive fabric integrated in the 100% polyester substrate is tested for the application of flexible antenna operating at 3.5 GHz with a gain value of 5.38 dB
Concerning the data used for the calculations relating to the radiating element and to the ground plane of the antenna, we used the electrical characteristics of the transparent conductive fabric (VeilShieldTM) provided by the manufacturer
Summary
For several decades and in particular with the appearance of cell phones, integrated antennas have given rise to significant research work. OLED technology is used for display in the field of flat screens and as well as their use as lighting panel where the electroluminescent properties of OLEDs do not require backlighting [1] This technology has excellent contrast and excellent brightness with strong integration (thin screen) and high energy efficiency. The idea is to use the wide distribution of domestic and urban lighting within cities to ensure a high flow rate by limiting the powers emitted by the transmitter and the receiver because the distance between the user and the source remains short With these advantages (reduction in energy consumption by enabling broadband), these antennas can be integrated on flexible and transparent supports. In the last part before the conclusion, this flexible antenna is integrated into the OLED light source structure which is composed of four simple layers by analyzing their performance after this integration by the simulation of their parameters by focusing the study on the reflection coefficient, the radiation diagram and the concave bending for different angle values
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