Harmonics mitigation and phase compensation technique for 3P4W SPV system

A Phase Compensation Technique of Sampling Moiré Method for Accurate Single-Shot Phase Analysis

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.70.243 ◽

2011 ◽

Vol 70 ◽

pp. 243-248

Author(s):

Shien Ri ◽

Takashi Muramatsu ◽

Masumi Saka

Keyword(s):

Computer Simulation ◽

Phase Analysis ◽

Phase Error ◽

Linear Interpolation ◽

Small Displacement ◽

Single Shot ◽

Phase Compensation ◽

Compensation Technique ◽

Moire Method ◽

Effective Phase

Recently, a technique for fast and accurate phase analysis called sampling moiré method has been developed for measurement of small-displacement distribution. In this study, a distribution of phase error caused by linear interpolation in case with mismatch between the sampling pitch and the grating pitch is theoretically analyzed. Moreover, a technique for effective phase compensation is proposed to reduce the periodic phase error. The performance of our compensation method is validated by a computer simulation. Phase analysis can be performed more accurately even in the case that the sampling pitch does not match to the grating pitch strictly.

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Phase Compensation Technique for Effective Heat Focusing in Microwave Hyperthermia Systems

Applied Sciences ◽

10.3390/app11135972 ◽

2021 ◽

Vol 11 (13) ◽

pp. 5972

Author(s):

Seonho Lim ◽

Young Joong Yoon

Keyword(s):

Target Area ◽

Phase Compensation ◽

Temperature Changes ◽

Multiple Tumor ◽

Beam Focusing ◽

Cancerous Cell ◽

Multifocal Breast Cancer ◽

Compensation Technique ◽

Circular Antenna Array ◽

Microwave Hyperthermia

In this paper, effective electromagnetic (EM) focusing achieved with a phase compensation technique for microwave hyperthermia systems is proposed. To treat tumor cells positioned deep inside a human female breast, EM energy must be properly focused on the target area. A circular antenna array for microwave hyperthermia allows EM energy to concentrate on a specific target inside the breast tumor. Depending on the cancerous cell conditions in the breast, the input phases of each antenna are calculated for single and multiple tumor cell locations. In the case of multifocal breast cancer, sub-array beam focusing via the phase compensation technique is presented to enhance the ability of EM energy to concentrate on multiple targets while minimizing damage to normal cells. To demonstrate the thermal treatment effects on single and multiple tumor locations, the accumulation of the specific absorption rate (SAR) parameter and temperature changes were verified using both simulated and experimental results.

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