Mitsuo Taguchi

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SUMMARY The formulation of the wall admittance of a circular microstrip antenna by the spectral domain method is presented. The circular microstrip antenna is calculated using the cavity model. The electromagnetic fields within the antenna cavity are determined from the impedance boundary condition at the side aperture. The contribution from the region(More)
SUMMARY The wall admittance of an arbitrarily shaped microstrip antenna is generally formulated. As examples, elliptical microstrip antennas with and without a circular slot are calculated. The wall admittance is determined by the spectral domain analysis in order to consider the effect of the dielectric substrate. The electromagnetic fields within the(More)
1. Introduction The authors have analyzed the resistance-loaded planar monopole antenna located within a rectangular parallelepiped cavity for impulse radar and shown the broadband operation of input impedance for the frequencies from 0.5 GHz to 4.5 GHz [1][2]. This antenna is fed by a coaxial probe from the wall of the rectangular cavity of 48 mm by 44 mm(More)
The WPT system composed of the unbalanced fed, ultra low profile inverted L antenna on a rectangular conducting plane is proposed and analyzed numerically. The input impedances of transmitting and receiving antennas are matched to 50 ohms by adjusting the length of horizontal element and the feed point position. The size of conducting plane is 550 mm by(More)
An ultra low profile inverted L antenna located within the rectangular conducting plane has been analyzed. In this paper, two types of inverted L antennas are proposed. The directivity of 3.3 dBi is obtained in the case of inverted L antenna composed of the coaxial cable, and 1.87 dBi in the case of inverted L antenna composed of CPW. This antenna is(More)
The return loss bandwidth of the unbalanced fed ultra low profile inverted L antenna has been extended by adjusting length and width of its conducting plane. The return loss less than -10 dB is satisfied at the frequency from 463 MHz to 606 MHz. This frequency bandwidth is almost 60 % of the television frequency band in Japan. This antenna is promising as(More)
The wireless power transmission system with the unbalanced fed inverted L antennas formed by coplanar waveguide on the rectangular conductor plane is proposed. The design frequency is 2.45 GHz. The size of the rectangular conducting plane is 48 mm by 56 mm, and height of the antenna element is 1 mm. In the case of the distance between transmitting and(More)
The characteristics of narrow-band and wideband models of unbalanced fed ultra low profile inverted L antenna are studied from the time response of voltage and current at the feed point. The antenna is excited by the Gaussian mono-cycle pulse generator. In the numerical analysis, the time domain solver of the electromagnetic simulator WIPL-D based on the(More)