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Impedance Matching in RFID Tags: to Which Impedance to Match?
2006 IEEE Antennas and Propagation Society International Symposium, 2006This paper presents an analysis of impedance matching in passive radio frequency identification (RFID) tags. RFID chip impedance varies with frequency and with the power absorbed by the chip. The variation of this impedance with power can drastically affect the performance of the chip. We show how the impedance variation of the chip front makes the tag
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Impedance transformation and matching
1991Starting with the expression derived in Chapter 2 for the input impedance of a length of terminated transmission line, it is shown that the transmission line acts as an impedance transformer of complex ratio. The Smith chart, a form of circle diagram which is a graphical aid for solving many transmission line and waveguide impedance calculations, is ...
F. A. Benson, T. M. Benson
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Acoustic impedance matching device
The Journal of the Acoustical Society of America, 1982A impedance matching window for an ultrasound transducer comprises a periodic array of stepped structures. Each stepped structure comprises a plurality of parallel matching strips disposed side-by-side on an active surface of a piezoelectric ceramic.
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2018
This chapter examines in detail the common broadband impedance matching subcircuits, and detailed derivations of the design equations are provided. The discussion starts with an analysis of the Bode–Fano inequalities that impose restrictions on the gain and bandwidth of broadband impedance matching subcircuits.
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This chapter examines in detail the common broadband impedance matching subcircuits, and detailed derivations of the design equations are provided. The discussion starts with an analysis of the Bode–Fano inequalities that impose restrictions on the gain and bandwidth of broadband impedance matching subcircuits.
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2019
This chapter discusses mainly impedance matching circuits that are used to match two different terminations. Among the several impedance matching techniques, the available implementation technology is what usually determines the possible matching technique that can be used.
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This chapter discusses mainly impedance matching circuits that are used to match two different terminations. Among the several impedance matching techniques, the available implementation technology is what usually determines the possible matching technique that can be used.
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Integrative oncology: Addressing the global challenges of cancer prevention and treatment
Ca-A Cancer Journal for Clinicians, 2022Jun J Mao,, Msce +2 more
exaly
Integrated-Transformer-Based Impedance Matching Method: Impedance Matching With Transformers
IEEE Microwave Magazine, 2022Leo Lancon +4 more
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2011
Once a coil is tuned to the Larmor frequency, it will need to be “matched” to the system impedance, which is 50 Ω. Matching techniques come largely from radio-frequency (RF) engineering dating back to the 1940s and are included in modern textbooks. An optimal match increases the receiver sensitivity, which is a very important factor in NMR and MRI ...
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Once a coil is tuned to the Larmor frequency, it will need to be “matched” to the system impedance, which is 50 Ω. Matching techniques come largely from radio-frequency (RF) engineering dating back to the 1940s and are included in modern textbooks. An optimal match increases the receiver sensitivity, which is a very important factor in NMR and MRI ...
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Narrow Band Impedance Matching
2018Design equations for the commonly used narrow band impedance matching subcircuits are derived in a methodical, step-by-step manner in this chapter. The starting point for each of these calculations is the conjugate matching condition, examined in detail before.
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