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This paper proposes a novel design of single branch wideband rectifier working at low input power level. Both the impedance tuning part and a dual-band matching network are adopted for wideband impedance matching. Theoretical analysis of the proposed wideband rectifier is presented and its closed-form design equations are derived. As an illustrated example, a wideband rectifier is designed and fabricated. Experimental results show that the fabricated rectifier features wide operated fractional bandwidth of more than 50%, low input power level from -5.0 dBm to 5 dBm, as well as a simple circuit structure and design procedure. KeywordsWideband, rectifier, wireless energy harvesting, impedance matchingRecent study rarely seeks balance between the input power density, the operated frequency bandwidth, and the design simplicity of the structure [8][9][10][11][12][13][14]. A more concrete design rule with closed-form equation needs to be further investigated for the efficient design of wideband rectifier. In this work, a single branch wideband rectifier is proposed by applying the presented wideband impedance matching network (WIMN). By controlling the input impedance and introducing a dual-band matching network, the input impedance of the rectifier can be optimized over a wide band to achieve wideband matching. Moreover, the closed-form design equations are derived for efficient design process. A wideband rectifier is then designed and fabricated to validate the proposed design method.