A dual-band RF energy harvesting circuit using 4th order dual-band matching network

Figures & data

Figure 1. Typical block diagram of RF energy harvesting circuit.

Figure 2. (a) Circuit diagram of the proposed dual-band rectifier circuit and (b) optimized dual-band rectifier circuit.

Figure 3. Conversion of a single-band matching network to dual-band matching network using $1-n$ frequency transformation.

Figure 4. Simulated $|S_{11}|$ vs. frequency for different combination of circuit elements.

Figure 5. Layout of the proposed dual-band RF energy harvesting circuit.

Figure 6. Photograph of the fabricated dual-band RF energy harvesting circuit.

Figure 7. (a) Simulated and measured $|S_{11}|$ vs. frequency and (b) measured $|S_{11}|$ for various power levels.

Figure 8. (a) Measured output dc voltage and RF-to-dc conversion efficiency and (b) measured dc voltage vs. frequency.

Figure 9. Measured RF-to-dc conversion efficiency for different load impedance.

Table 1. Performance comparison of the proposed dual rectifier with recently published works

Ref.	Measured rectifier efficiency (%)	Input power (dBm)	Rectifier size
Ho et al. (2016)	15.8 @ 0.89 GHz	$-20$	$100\times 65{\text{mm}}^2$
	11.2 @ 1.76 GHz
Hamano et al. (2016)	10 @ 2.15 GHz	$-10$	$37\times 71{\text{mm}}^2$
	15 @ 5.84 GHz
Bergès et al. (2015)	27 @ 0.91/2.4 GHz	$-16$	$78\times 88{\text{mm}}^2$
Sun et al. (2013)	30 @ 2.14 GHz	$-20$	145 mm
	35 @ 1.84 GHz
Liu et al. (15)	20 @ (0.91+1.8) GHz	$-20$	$23\times 37{\text{mm}}^2$
This work	27.5 @ 0.9 GHz	$-20$	$30\times 35{\text{mm}}^2$
	20 @ 1.8 GHz

Ho, D. K., Kharrat, I., Ngo, V. D., Vuong, T. P., Nguyen, Q. C., & Le, M. T. (2016). Dual-band rectenna for ambient RF energy harvesting at GSM 900 MHz and 1800 MHz (pp. 306–310). 2016 IEEE International Conference on Sustainable Energy Technologies (ICSET), Hanoi.

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Hamano, K., Tanaka, R., Yoshida, S., Miyachi, A., Nishikawa, K., & Kawasaki, S. (2016). Design of dual-band rectifier using microstrip spurline notch filter. Radio-Frequency Integration Technology (RFIT), 2016 IEEE International Symposium on. IEEE.

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Bergès, R., Fadel, L., Oyhenart, L., Vigneras, V., & Taris, T. (2015). A dual band 915MHz/2.44 GHz RF energy harvester. Microwave Conference (EuMC), 2015 European. IEEE.

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Sun, H., Guo, Y. X., He, M., & Zhong, Z. (2013). A dual-band rectenna using broadband Yagi antenna array for ambient RF power harvesting. IEEE Antennas and Wireless Propagation Letters, 12, 918–921. doi:10.1109/LAWP.2013.2272873.

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