Rectenna for Wireless Power Transmission
Rectenna (rectifying antenna) is designed for better conversion efficiency. The obtained efficiency is 57.8%. The return loss obtained is −25.043 dB. The working characteristics of the rectenna are determined by the characteristic curves which depend on t
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Abstract Rectenna (rectifying antenna) is designed for better conversion efficiency. The obtained efficiency is 57.8%. The return loss obtained is −25.043 dB. The working characteristics of the rectenna are determined by the characteristic curves which depend on the input power. The power varies from −20 to 20 dBm. This paper focus on the microwave power transmission and conversion efficiency and how efficiently the conversion takes place. The rectifier circuit was designed and simulated in advanced design system (ADS) software while the antenna was designed using high-frequency structure simulator (HFSS). Keywords Microwave power transmission · Conversion efficiency · Rectenna
1 Introduction The rectenna (rectifying antenna) was first demonstrated by William C. Brown in 1962. Recently, wireless power transmission (WPT) is an important solution for providing power for wireless or non-contact-based devices. WPT can be achieved by different methods such as near-field inductive coupling, magnetic resonant coupling, and microwave power transmission (MPT) [1–3]. Among these, MPT has much longer transmission range. DC voltage used to drive the terminals should be followed by a rectification circuit which transfers the DC voltage at microwave frequency from receiving antenna to DC voltage output. To increase the beam efficiency over long distance, the frequency should be increased, but due to increased frequency, the efficiency of the system decreases. Wireless power transfer is discussed by diffrent authors in various papers [4–14] keeping main focus to improve the conversion R. Bharati · J. Sahay (B) Department of Electronics & Communication Engineering, Birla Institute of Technology, Mesra, Ranchi, JH 835215, India e-mail: [email protected] R. Bharati e-mail: [email protected] © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021 V. Nath and J. K. Mandal (eds.), Proceedings of the Fourth International Conference on Microelectronics, Computing and Communication Systems, Lecture Notes in Electrical Engineering 673, https://doi.org/10.1007/978-981-15-5546-6_34
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efficency. In this paper, the focus is on the 2.45 GHz frequency which leads to smaller aperture as well as better conversion efficiency. Different input power is given to the rectenna from −20 to 20 dBm. The simulated result has been shown with different conversion efficiency. The main objectives of designing the rectenna were that rectenna will be able to receive microwave energy at 2.45 GHz frequency and converting that to DC power, better return loss so that maximum output can be obtained, increase the overall efficiency so that RF-DC conversion is more efficient.
1.1 What Is Rectenna? The main function of a rectenna is to receive the RF waves and convert them to the DC power. The block diagram of recenna has been shown in Fig. 1. The receiving power function is done by the antenna, while the conversion is done by the rectifier. Higher efficiency rec
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