A Compact and High-Efficiency Design of 0.915/2.45 GHz Dual-Band Shunt-Diode Rectifier for Wireless Power Transfer

Nguyen, Dang‐An; Seo, Chulhun

doi:10.1109/lmwc.2022.3158337

Cited by 21 publications

(13 citation statements)

References 16 publications

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“…Finally, a dc-pass filter is added at the load side to block any ac signal from flowing to the load and flatten the dc output voltage. Typical TLIN-based networks for DB fundamental impedance matching: a) T type [8], [15], [16], b) cascaded type [12], c) multi-section type [14], d) coupled-line type [13], [17] e) π type [10].…”

Section: Overview Of the Conventional Db Rectifier And Its Disadvantagementioning

confidence: 99%

“…The typical structures for DB-FMN realization have been performed as shown in Fig. 2 with TLIN-based implementation such as T-type [8], [15], [16], cascaded-type [12], multisection type [14], coupled line-type [13], [17], and π-type [10] networks. These networks are investigated in a closedform manner with the formula-based parameter extraction.…”

Section: Overview Of the Conventional Db Rectifier And Its Disadvantagementioning

confidence: 99%

“…2(a)-(d) consistently realize a DB matching with the diode impedance which, as a result, reduces the design complexity. As shown in [15], the diode impedance Z D at a specific frequency can be characterized as a parallel connection of a resistor R D and a capacitor C D . Mathematically, Z D is given as follows where ω = 2πf is the angular frequency.…”

Section: A Diode Impedance Analysis and Consistent Db-fmn Realizationmentioning

confidence: 99%

“…In addition, the imaginary magnitude variation with a negative slope is obtained if ω 2 R 2 D C 2 D > 1 is satisfied, and this is true at high frequency ω. The negative-slope behavior of |X | can be ensured through increasing capacitance C D thanks to connecting an additional parallel capacitor with the diode [15]. In general, with two operating separate microwave frequencies, i.e., f 1 and f 2 (f 1 < f 2 ), the diode impedance Z D exhibits a negative-slope variation with frequency in terms of both real and imaginary magnitudes, leading…”

Section: A Diode Impedance Analysis and Consistent Db-fmn Realizationmentioning

confidence: 99%

“…The Schottky diode model BAT15-03W is used, whose SPICE parameters are as follows: V br =6.4 V, C j0 =138.5 fF, I S =74 nA, R S =5 Ω, and V bi =0.2 V. The optimal diode impedance for DB fundamental matching is 81 − j192 Ω at f 1 and 27 − j53 Ω at f 2 , which is capacitive and exhibits lower magnitude at higher frequency as analyzed in section III-A. Then, TLIN parameters of the T-type DB-FMN are definitely extracted based on equations as investigated in detail in [15], [19] and listed in Table I together with TLIN parameters of DB-HCN given in section III-B.…”

Section: Implementation Simulation and Experiments Verificationmentioning

confidence: 99%

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A Novel Structure of Compact and High-Efficiency Dual-Band Rectifier With Low Complexity for Wireless Power Transfer

Nguyen,

Bui,

Seo

2024

IEEE Access

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A novel methodology is presented for designing compact and high-efficiency dual-band (DB) rectifier with low insertion loss and complexity. The proposed network implements an opposite order of fundamental matching and harmonic control, as compared to the conventional approaches. Specifically, a typical T-type DB fundamental matching network with closed-form formulas is first used to match directly the diode impedance to the 50Ω standard load. As analyzed, this matching circuit consistently generate a perfect DB matching due to the frequency-dependent diode impedance without any additional impedance tuning methods, yielding a low design complexity. Then, a DB harmonic control mechanism is provided by combination of a DB resonator and a 50Ω tuning series line, which can yield precise class-R harmonic termination of second and third harmonics with only a total of three transmission lines leading a low insertion loss. A rectifier is designed, simulated and measured at two target frequencies of 2.45 and 5.8 GHz for verification. The measured results show a peak PCE of 80.6% at 2.33 GHz and 73.1% at 5.65 GHz while having a compact size of 4.6×3.1 cm 2 , indicating achievement of a superior performance with a simplicity of the design process to the other similar designs.INDEX TERMS Microwave rectifiers, wireless power transfer, energy harvesting, DB harmonic control, DB impedance matching, transmission lines, DB resonator.

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Section: Overview Of the Conventional Db Rectifier And Its Disadvantagementioning

confidence: 99%

Section: Overview Of the Conventional Db Rectifier And Its Disadvantagementioning

confidence: 99%

Section: A Diode Impedance Analysis and Consistent Db-fmn Realizationmentioning

confidence: 99%

Section: A Diode Impedance Analysis and Consistent Db-fmn Realizationmentioning

confidence: 99%

Section: Implementation Simulation and Experiments Verificationmentioning

confidence: 99%

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A Novel Structure of Compact and High-Efficiency Dual-Band Rectifier With Low Complexity for Wireless Power Transfer

Nguyen,

Bui,

Seo

2024

IEEE Access

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High efficiency dual‐band rectifiers with wide input power range for wireless power transfer

Liu,

Xie,

Wang

2024

Micro & Optical Tech Letters

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A watt‐scale dual‐band rectifier with excellent efficiency and a wide input power range is proposed in this letter. The rectifier is composed of two stages. In the first stage, a novel impedance‐matching network with four transmission lines (TLINs) is proposed, which can independently change the input impedance of each band over a large input power range. This approach by deriving closed‐form analytical equations to obtain an exact solution. To test the parameters of the first part of the TLINs in validation and to guarantee excellent efficiency, two TLINs are used in the second stage to control the harmonics. At 0 dBm, the power conversion efficiency (PCE) is 51.2% and 56.7% at 2.4 and 5.8 GHz, respectively, at a load of 1.2 kΩ. At 2.4 GHz, PCE reaches a peak of 68% at 13 dBm. At 5.8 GHz, PCE enhances up to 89% at 17 dBm. At 2.4 and 5.8 GHz, the PCE exceeds 70% of the peak over a wide input power range of −3 to 18 and 1.5–18 dBm, respectively. For verification, the proposed rectifier is fabricated. The simulation results are consistent with the measurements. The proposed rectifier performs well in terms of compactness and rectification effectiveness. It provides a solution for powering low‐power devices.

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RF energy harvesters for wireless sensors, state of the art, future prospects and challenges: a review

Khan,

Farina

et al. 2024

Phys Eng Sci Med

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The power consumption of portable gadgets, implantable medical devices (IMDs) and wireless sensor nodes (WSNs) has reduced significantly with the ongoing progression in low-power electronics and the swift advancement in nano and microfabrication. Energy harvesting techniques that extract and convert ambient energy into electrical power have been favored to operate such low-power devices as an alternative to batteries. Due to the expanded availability of radio frequency (RF) energy residue in the surroundings, radio frequency energy harvesters (RFEHs) for low-power devices have garnered notable attention in recent times. This work establishes a review study of RFEHs developed for the utilization of low-power devices. From the modest single band to the complex multiband circuitry, the work reviews state of the art of required circuitry for RFEH that contains a receiving antenna, impedance matching circuit, and an AC-DC rectifier. Furthermore, the advantages and disadvantages associated with various circuit architectures are comprehensively discussed. Moreover, the reported receiving antenna, impedance matching circuit, and an AC-DC rectifier are also compared to draw conclusions towards their implementations in RFEHs for sensors and biomedical devices applications.

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A Compact and High-Efficiency Design of 0.915/2.45 GHz Dual-Band Shunt-Diode Rectifier for Wireless Power Transfer

Cited by 21 publications

References 16 publications

A Novel Structure of Compact and High-Efficiency Dual-Band Rectifier With Low Complexity for Wireless Power Transfer

A Novel Structure of Compact and High-Efficiency Dual-Band Rectifier With Low Complexity for Wireless Power Transfer

High efficiency dual‐band rectifiers with wide input power range for wireless power transfer

RF energy harvesters for wireless sensors, state of the art, future prospects and challenges: a review

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