| 摘要 |
The present invention provides a miniaturized circular polarized microstrip antenna that employs a dielectric substrate having a large relative dielectric constant so that a desired resonance frequency and a desired axis ratio are obtained. In a circular polarized wave microstrip antenna 1 having a nearly square dielectric substrate 4 with a nearly square patch electrode 2 formed on one surface thereof, and a ground electrode 3 formed on almost the whole of another surface thereof, triangular first notches 2a and 2b serving as retraction-separation elements are respectively formed 135 and 315 degrees with respect to a direction toward a feeding point 5 from the center of the patch electrode 2, which is defined as 0, and within the first notch 2b, a first adjustment electrode 2c extending outwardly from an edge of the patch electrode 2 is formed. On the other hand, a triangular second notch 2d is formed 45 degrees with respect to a direction toward the feeding point 5 from the center of the patch electrode 2, which is defined as 0, and within the second notch 2d, a second adjustment electrode 2e extending outwardly from an edge of the patch electrode 2 is formed.
|
