Antenna / On-Chip-Rectifier Co-Design Methodology for Micro-Watt Microwave Wireless Power Transfer

Hashimoto, Takuma; Tanzawa, Toru

doi:10.1109/mwscas54063.2022.9859394

Cited by 1 publication

(4 citation statements)

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“…Therefore, this "design flow in the forward direction", i.e., " input output" is very time-consuming. Thus, "design flow in the backward direction" was proposed [14], as shown in Figure 4. In the backward direction flow, the input power is calculated by using a linearized model with the output power given in advance.…”

Section: Antenna/on-chip Rectifier Optimum Co-design Flowmentioning

confidence: 99%

“…As a result, even if the rectenna designers want to investigate N-antennas and N-rectifiers, they only need to run N-simulations. N 2 -combinations are investi- Thus, "design flow in the backward direction" was proposed [14], as shown in Figure 4. In the backward direction flow, the input power is calculated by using a linearized model with the output power given in advance.…”

Section: Antenna/on-chip Rectifier Optimum Co-design Flowmentioning

confidence: 99%

“…Therefore, the proposed design equations are proved to be reliable to calculate P in on the impedance plane. The antenna impedance varies with the element length for dipole antenna and the loop diameter for circular loop antenna [14]. Therefore, their antenna impedance loci can be drawn on the input power contour plots (P in−app and P in−e f f ) of each rectifier candidate, as shown in Figures 13 and 14 for models 1 and 2, respectively.…”

Section: Parameters Valuementioning

confidence: 99%

“…In Ref. [14], a linearized equivalent circuit model was proposed to effectively determine the best one among the combinations of multiple types of antennas and rectifiers to have the minimum input power. There have been several works to design rectenna in literature.…”

Section: Introductionmentioning

confidence: 99%

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Design Space Exploration of Antenna Impedance and On-Chip Rectifier for Microwave Wireless Power Transfer

Hashimoto

Tanzawa

2022

Electronics

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This paper discusses a design methodology to efficiently determine the best combination of rectenna (rectifier and antenna) to minimize the input power under a given output condition for microwave wireless power transfer (MWPT) without any other external components, such as a matching network, for cost reduction. A linearized equivalent circuit model is expanded upon to include the microstrip line connecting the antenna and rectifier. Based on the model, the design flow is presented that has mainly three steps: (1) Determination of the equivalent rectifier input impedance and the amplitude of input voltage by running SPICE simulation, (2) Drawing contour plots of input power by rectifier candidate on the antenna impedance plane by conducting model calculation and impedance loci of antenna candidates on the contour plots, and (3) Selecting the combination of antenna and rectifier which gives the minimum input power for all the combinations. To validate the equivalent circuit model and design flow, a single-diode (SD) rectifier and a voltage-doubler (VD) rectifier were fabricated in 65 nm CMOS. The input power to generate 100 μA at 1 Vdc was measured and compared. The model, SPICE and measurement are in good agreement with each other that VD has 30–50% lower input power than SD does. In addition, the sensitivity of the parasitic elements, such as the microstrip line and the bonding wires and pads on the input power, are investigated to explore the design space for rectenna.

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Section: Antenna/on-chip Rectifier Optimum Co-design Flowmentioning

confidence: 99%

Section: Antenna/on-chip Rectifier Optimum Co-design Flowmentioning

confidence: 99%

Section: Parameters Valuementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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