| 摘要 |
PURPOSE:To eliminate the generation of disturbance even if the strength of an electromagnetic field is decreased at a location other than an area by arranging two conductors in parallel winding a wire on an outer circumference of a core and also inserting a static capacitor between the two conductors to attain mobile communication. CONSTITUTION:Wires 11, 11' are wound on an outer circumference of magnetic cores 10, 10' in spiral to form conductors 12, 12'. The conductors 12, 12' are arranged in parallel and the static capacitor is inserted by connecting capacitors 13 to the conductors 11, 11' at every prescribed interval. A delay time T=LC is produced to the line, where L is an inductance of the conductors 12, 12' and C is the static capacitance of the capacitor 13, and the signal is delayered from the speed in a free space. Thus, the phase constant beta is increased, the wavelength lambda on the line is shortened in comparison with the wavelength lambda0 in the free space, and a magnetic field H is expressed in Equation I , where K is the modified Bessel function and R is a distance from the line. Then, the magnetic field H is attenuated rapidly at almost the same distance R as the shortened wavelength lambda on the line according to the function K. |
