Full-wave exact integral solutions of a current carrying loop in a general half-space

Our purpose is to develop electromagnetic (EM) transient sounding methods that can handle resistivity structures having dipping interfaces. The method is an approximation that uses wave theory for part of the calculation and ray theory for the rest. The approximation is a refinement of Yost’s (1952) image method in which the source on a half‐space becomes the image beneath the reflecting interface. This approach shows excellent agreement with experiment and promises simple applications. To test the approximation, we compare numerical integration of the fields over a two‐layer half‐space with approximate values. We separate the EM integrals into integrals for the surface wave, primary, and multiple reflections. For a current dipole along the x‐axis, the electric field [Formula: see text] is the sum of the transverse electric and transverse magnetic components. For skin depths >1, the main contributions to the integrals come from directions near the specular direction, and by moving the reflection coefficients at the lower interface outside of the integral, we obtain the hybrid‐ray approximation. The transmission coefficients from the source into the earth remain inside because the source is near the interface. Computations for a two‐layer model that includes the geometry, and system functions for deep dipole‐dipole soundings in the Precambrian shield of northern Wisconsin, give time‐domain signals that closely approximate the measurements. The theoretical model consists of a layer 18 to 23 km thick with a conductivity of [Formula: see text] over a half‐space with a conductivity of [Formula: see text].

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Field distribution due to a current-carrying loop of arbitrary shape above a conducting half-space

IEEE Transactions on Magnetics ◽

10.1109/20.538864 ◽

1996 ◽

Vol 32 (5) ◽

pp. 4344-4346 ◽

Cited By ~ 11

Author(s):

S.H.H. Sadeghi ◽

A.H. Salemi

Keyword(s):

Half Space ◽

Field Distribution ◽

Arbitrary Shape ◽

A Current

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Transient Analysis of a Current‐Driven Full Wave AC/DC Converter for Indirect Characterization of Piezoelectric Devices during Energy Harvesting

Energy Technology ◽

10.1002/ente.201901317 ◽

2020 ◽

Vol 8 (3) ◽

pp. 1901317

Author(s):

Marcin J. Kraśny ◽

Christopher R. Bowen ◽

Coralie Michel ◽

John T. Taylor

Keyword(s):

Energy Harvesting ◽

Transient Analysis ◽

Full Wave ◽

Piezoelectric Devices ◽

A Current

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A Comparative Study on Current- and Voltage-Optimized Circuit Scheme for Multiple-Transmitter and Single-Receiver WPT System

Journal of Electrical and Computer Engineering ◽

10.1155/2020/7536465 ◽

2020 ◽

Vol 2020 ◽

pp. 1-11

Author(s):

Jin Zhang ◽

Weiao Xu ◽

Dong Chen ◽

Chen Zhang

Keyword(s):

Comparative Study ◽

Power Transmission ◽

Input Power ◽

Structural System ◽

Wireless Power ◽

Full Wave ◽

Source Voltage ◽

Constant Source ◽

Single Receiver ◽

A Current

As an important structural system for effectively improving power delivered to the load (PDL) and power transmission range, multiple-transmitter (TX) and single-receiver (RX) wireless power transfer (WPT) system is gaining more and more attention in both academic circles and the industrial fields. Based on the Lagrange multiplier method, this paper first provides a current- and voltage-optimized circuit scheme to maximize the PDL of the multiple-TX WPT system. Then, for a determined WPT system, the current-optimized circuit scheme is proposed to maximize the PDL effectively with constant source voltages and feeding currents for TXs. While voltage-optimized circuit scheme can effectively adjust the source voltages and feeding currents and maintain the same level of input power and PDL as a current-optimized solution. Through comparative study, the voltage-optimized solution shows its advantages in adjustable source voltage and feeding current without any degradation of PDL. Finally, the theoretical analysis results are confirmed by the results of full-wave electromagnetic simulation.

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A NEW MIXED MODE FULL-WAVE RECTIFIER REALIZATION WITH CURRENT DIFFERENCING TRANSCONDUCTANCE AMPLIFIER

Journal of Circuits System and Computers ◽

10.1142/s0218126614501011 ◽

2014 ◽

Vol 23 (07) ◽

pp. 1450101 ◽

Cited By ~ 12

Author(s):

FIRAT KAÇAR ◽

MUHAMMED EMIN BAŞAK

Keyword(s):

Monte Carlo ◽

Mixed Mode ◽

Zero Crossing ◽

Mos Transistor ◽

Full Wave ◽

Transconductance Amplifier ◽

Current Voltage ◽

Simulation Results ◽

Current Differencing Transconductance Amplifier ◽

A Current

In this paper, a new mixed mode full-wave rectifier which consists of a current differencing transconductance amplifier (CDTA), resistor and two complementary MOS transistor is presented. The proposed circuit is called as mixed mode because it can be used as current-, voltage-, transimpedance- and transconductance-mode rectifier depending on how the resistor is connected to the input or output of the circuit. The presented circuit has an appropriate zero crossing performance, linearity, low component count, and can be adapted to modern IC technologies. It is also suitable for monolithic integrated implementation. LTSPICE simulations with 0.18 μm CMOS model obtained through TMSC are included to verify the workability of the proposed circuit. We also performed noise and Monte Carlo analyses. Various simulation results are presented to show the effectiveness of the proposed circuit.

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Current Mode Full-Wave Rectifier Based on a Single MZC-CDTA

Active and Passive Electronic Components ◽

10.1155/2013/967057 ◽

2013 ◽

Vol 2013 ◽

pp. 1-5 ◽

Cited By ~ 16

Author(s):

Neeta Pandey ◽

Rajeshwari Pandey

Keyword(s):

Current Mode ◽

Cmos Technology ◽

Spice Simulation ◽

Full Wave ◽

Transconductance Amplifier ◽

Current Difference ◽

A Current

This paper presents a current mode full-wave rectifier based on single modified Z copy current difference transconductance amplifier (MZC-CDTA) and two switches. The circuit is simple and is suitable for IC implementation. The functionality of the circuit is verified with SPICE simulation using 0.35 μm TSMC CMOS technology parameters.

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