Abstract: A hemispherical dielectric resonator is arranged on a metal substrate to make a flat surface of the hemispherical dielectric resonator contact with the metal substrate, and a dielectric wave-guiding channel is connected with a curved side surface of the hemispherical dielectric resonator. Therefore, a dielectric resonance antenna in which the hemispherical dielectric resonator and the dielectric wave-guiding channel are placed on the same metal substrate is obtained. A signal transmitting through the dielectric wave-guiding channel is fed in the hemispherical dielectric resonator, the hemispherical dielectric resonator is resonated, and an electromagnetic wave is radiated. Therefore, the dielectric resonance antenna functions as a wave radiation device.

Abstract: A method for producing a coupler based on fiber-fused connection enabling simple, rapid production of a coupler no matter how many optical fiber core lines may be involved or no matter how small their diameter may be, comprises placing a plurality of optical fiber cords 1, 2 in parallel which comprise optical fiber core lines 3, 4 covered with jackets 7, 8 with resilient fibers 5, 6 inserted between the periphery of the core lines and the jackets; cutting a specified point of the jacket of each optical fiber core line to divide the jacket into two limbs; sliding the divided limbs (9, 9′ and 10, 10′) of the jackets in opposite directions to expose thereby sections of the underlying optical fiber core lines, the exposed sections of optical fibers being brought into contact with each other, and heated to melt to form thereby a fusion-connected section 11; sliding back each jacket limb close to the fusion-connected section; and placing the fusion-connected section 11 together with the inward ends of j