| 摘要 |
PROBLEM TO BE SOLVED: To easily adjust a resonance frequency, to increase yield of a product, and to improve productivity by adjusting an interval between a radiation element and a parasitic element by moving a substrate vertically, provided with the radiation element. SOLUTION: This radiation element 1 is arranged on a 1st dielectric substrate 4a, provided with a grounding conductor film 5 on its rear surface, together with a microstrip feeder, and the parasitic element 3 is installed on a 2nd dielectric substrate 4b in a radiation direction of the radiation element 1 and made to resonate. At this time, the substrate 4a is moved vertically from the rear side of the substrate 4a with a nonmetallic plastic screw 7 to vary the interval between the radiation element 1 and parasitic element 3, thereby easily adjusting the resonance frequency. The parts are stored in a spherical radome 6 made of a fiber-reinforced plastic, and a spacer 9 for preventing the radiation element and parasitic element from coming into contact with each other is provided and moved along a fixed plate 8, so that both the elements will always be parallel. |
