نتایج جستجو برای: finite difference time domain

تعداد نتایج: 2713799  

Journal: :Journal of Electrical Engineering and Technology 2011

Journal: :The Journal of the Acoustical Society of America 1996

2004
Atef Z. Elsherbeni Chun-Wen Paul Huang Charles E. Smith

Abstract: Printed antennas are becoming one of the most popular designs in personal wireless communications systems. In this paper, the design of a novel tapered meander line antenna is presented. The design analysis and characterization of the antenna is performed using the finite difference time domain technique and experimental verifications are performed to ensure the effectiveness of the n...

1995
U. Becker T. Weiland M. Dohlus S. Lütgert D. Sprehn

To facilitate the design of high power klystrons an investigation into the reliability and accuracy of three modern particle-in-cell codes was performed. A 150MW S-band klystron for which measurements were available was used for this comparison. The field calculations of the particle-in-cell codes are based on a finite difference time domain scheme, and use a port approximation to speed up the ...

2004
Masanori Takahashi Hiroyasu Ota Ken Ichi Arai Risaburo Sato

We developed a magnetic field probe consisting of a LiNbO3 optical waveguide modulator and a loop antenna element for accurate magnetic near-field measurements in the gigahertz range. We confirmed the probe invasiveness by measuring magnetic field distributions above a patch antenna operating at 2.49 GHz using the probe. Then we compared those measured results with those for shielded loop probe...

2005
A. R. Alija L. J. Martínez A. García-Martín M. L. Dotor P. A Postigo

We have found a blueshift in the cavity modes confined in two-dimensional photonic crystal microcavities when the thickness of the slab was varied uniformly by accurate dry etching. The shifts in the wavelength of the cavity modes were around 2 nm towards shorter wavelengths per nanometer reduced in the thickness of the slab. Three-dimensional plane wave expansion calculations showed that the o...

2003
Yuji Ukai S. Ishida Nobuhiko Hata Takashi Azuma Shinichiro Umemura Takeyoshi Dohi

We have previously proposed a method of cutting bones using high intensity focused ultrasound. The goal of the method is to cut bones in a body without incising skin, but the condition under which bones are cut properly is so sensitive that 1 mm of displacement makes cutting bones fail resulting in necrosis around the focal point. In this paper, we have developed a focused ultrasound propagatio...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید