Gains Maximization via Impedance Matching Networks for Wireless Power Transfer

Wang, Qinghua; Che, Wenquan; Dionigi, Marco; Mastri, Franco; Mongiardo, M.; Monti, Giuseppina

doi:10.2528/pier18102402

Cited by 16 publications

(13 citation statements)

References 24 publications

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“…The maximum (unilateral when S12 = 0) gain is the best possible gain that can be achieved. It is the optimum gain of the amplifier, and can be achieved when the input and output networks of the amplifier are conjugate matched [9] to the transistor, and when the system is stable. It is determined by the S-parameters, i.e when ΓS= S11*, and ΓL= S22*.…”

Section: Maximum Gainmentioning

confidence: 99%

“…In other to maximize the gain, for maximum power transfer, and to minimize losses due to reflections, matching of both the input and output network is required [9]. In the design of an amplifier, maximum gain can be achieved by tuning the circuit components with the tuning function in ADS, or by matching the input and output circuits using a smith chart.…”

Section: Input and Output Matching Circuitsmentioning

confidence: 99%

See 1 more Smart Citation

Design and Analysis of a Broadband Microwave Amplifier

Okoyeigbo

Ibhaze

Olajube³

et al. 2021

IJEEI

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This paper presents the procedures involved in the design and analysis of a microstrip broadband microwave amplifier. For system design, simulation, optimization and analysis, a Computer Aided Design (CAD) tool known as Agilent Advanced Design System (ADS) was employed. The amplifier device-FLC317MG-4 FET, was tested for stability, and was observed to be unconditionally stable between 2 to 6 GHz frequency band. Two possible ideal matching circuits were investigated to identify the best matching circuit with the maximum transducer power gain. It was observed that the quarter-wave transformer with parallel open circuit stub, gave a high gain at a wider range of frequency (larger bandwidth/ broadband), than the other matching circuit. Hence, it was employed for the broadband amplifier design using microstrips, and achieved a maximum flat gain of about 9.8 dB to 10.118 dB, at a bandwidth of 3.5 to 4.5 GHz.

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Section: Maximum Gainmentioning

confidence: 99%

Section: Input and Output Matching Circuitsmentioning

confidence: 99%

Design and Analysis of a Broadband Microwave Amplifier

Okoyeigbo

Ibhaze

Olajube³

et al. 2021

IJEEI

View full text Add to dashboard Cite

show abstract

“…Wang et al [10] propose a formula which was derived with circuit theory to get the optimal load resistance for a certain mutual induction between two resonators, and because the mutual induction is dependent on the distance this formula also indicates what the optimal load resistance is for a certain distance between two resonators. The formula for the optimal load resistance is [3][4][5][6]:…”

Section: The Wpt System With Two Coilsmentioning

confidence: 99%

“…Placing the sending and receiving coils in a perfect position is a challenging task, which is not realistic in every application scenario. In fact, lateral misalignment of coils is persistent, and an important decrease of the energy transmission efficiency of the system occurs [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Circular Flat Spiral Coils Structure Effect on Magnetic Resonance Wireless Power Transfer Performance

Mohdeb¹

2020

PIER M

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Wireless power transfer (WPT) via coupled magnetic resonance is an encouraging technology to be applied in many fields. In this paper, a method using a circular coil spiral inductor structure to wirelessly transfer energy is proposed. It represents the characteristic of six parallel air core inductors mutually coupled in the free space for wireless power transfer system. Based on the analytical model and circuit theory, the relationship between the coil design parameters and the system performance is deduced, and the effects of the outer radius, inner radius, channel width, and coil turns are thoroughly studied to improve the system performance at different axial distances and in lateral misalignment. Also, an elimination method for transmission efficiency dead-zone (TEDZ) is proposed. The proposed method utilizes angular rotation of the receiver (P x) to eliminate the zero-coupling point which causes TEDZ and boosts the coupling coefficient such that the TEDZ is eliminated, and the high efficiency region is extended.

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“…Therefore, a more efficient and convenient method is urgently required for power transfer. In recent years, wireless power transfer (WPT) has received considerable attention [1][2][3][4][5]. With this technique, the power can be delivered to load without mechanical contact [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Nonlinear Magnetic Coupling Wireless Power Transfer System

Wang¹,

Ren²,

Shi³

et al. 2021

PIER C

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In near-field energy transmission, it has been proved that magnetic coupling wireless power transfer (MC-WPT) is a promising energy transmission method. Traditionally, the MC-WPT system is established based on a linear resonant circuit. Recently, it has been reported that nonlinear MC-WPT system shows more advantages. However, nonlinear characteristics of the nonlinear MC-WPT system are not fully recovered. In this paper, a nonlinear MC-WPT system which can be described by Duffing equation is presented. The mathematical model of the equivalent circuit is developed. The related nonlinear characteristics under the impact of driving force are investigated. It is found that the driving force has a direct impact on the system performance. The operation of the nonlinear MC-WPT system varies from periodic sinusoidal state to periodic non-sinusoidal state even to chaotic state when the driving force increases. It should be mentioned that the chaotic state should be avoided. Generally, the MC-WPT system should be operated in periodic sinusoidal state which only covers a small range of driving force. For the system operated in periodic non-sinusoidal state, a waveform correcting circuit is designed. The simulated and experimental results show that the restriction of the driving force on the operation of the system is eliminated with a waveform correcting circuit added. It is possible for the nonlinear MC-WPT system to be operated in a much wider range.

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Gains Maximization via Impedance Matching Networks for Wireless Power Transfer

Cited by 16 publications

References 24 publications

Design and Analysis of a Broadband Microwave Amplifier

Design and Analysis of a Broadband Microwave Amplifier

Comparative Study of Circular Flat Spiral Coils Structure Effect on Magnetic Resonance Wireless Power Transfer Performance

Analysis of a Nonlinear Magnetic Coupling Wireless Power Transfer System

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