| 摘要 |
PROBLEM TO BE SOLVED: To provide a miniaturized microstrip antenna, corresponding to plural frequency bands and selectable polarization. SOLUTION: A microstrip antenna 1 consists of a first radial electrode 12 fanned on one main surface of a substrate and provided with a feeding through hole 16, second radial electrodes 13 and 14 formed surrounding it and provided with plural through-holes 17, a ground electrode 15 formed on the other main surface of the substrate 11, the feeding through-hole 16 and the plural through holes 17 formed at a position corresponding to the first (second) radial electrode, and capacity connection parts 18a and 18b for capacity connecting the first radial electrode 12 and the second radial electrodes 13 and 14. A connector is inserted to the through-hole 16 as a coaxial line for feeding power to fix to the substrate 11 by soldering 20a and 20b, and the second radial electrodes 13 and 14 are connected to the ground electrode through the through-hole 17. |
