Wireless power transmission (WPT) is an emerging technology with the contribution to develop many important applications in the almost field of life. Recently, there is much research which concentrates on this technology. In there, the study of methods to enhance the RF-DC conversion efficiency of the far-field power receiver takes more consideration. However, almost of them go into the detail of some individual frequency band. With the purpose of increasing the ability working on a wide-range frequency of power receiver, the thesis will develop a wideband rectifier which is the main part of far-field power receiver. The frequency band will cover the range from 1.6 GHz – 2.5 GHz includes the GPS band (1.6 GHz), GSM-1800, GSM-1900, (1.850 GHz – 2.4 GHz), Wifi (2.4 GHz), etc. Accordingly, the thesis will analyze the principle of basic rectifier topologies, the causes which lead to reducing power conversion efficiency of the rectifier. To demonstrate the rectifying ability of rectifier, a narrow band rectifier which works in the wifi-band, 2.45 GHz, will be fabricated on FR4 substrate. The wifi-band rectifier shows a conversion efficiency of higher than 60% in-band with an input power of 5dBm, corresponding to the output voltage of 2 V at output load of 2.1 kΩ.
To design a wideband rectifier, a matching technique which is known as the name Real Frequency Technique will be utilized. The theory of this technique will be described in steps with the support of Matlab software. Subsequently, a software which is named RectifierRFCAD is built for designing a wideband matching network of rectifier using microstrip lines. This software will be used accompany with harmonic balance source pull simulation in Advance System Designer (ADS) to simulate and design the wideband rectifier. The testkey is fabricated reaches the conversion efficiency of higher than 55% in the frequency range from 1.6 GHz to 2.5 GHz with an input power of 5dBm. The output voltage of 2 V is obtained at output load of 2.1 kΩ.

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