Broadband antenna using semicircular radiator
A radiator, semi-circular technology, used in antennas, resonant antennas, electrical short antennas, etc., can solve the problems of space occupation and bulkiness, and achieve the effect of reducing space occupation and improving VSWR characteristics.
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no. 1 example
[0080] Image 6 is a perspective view showing the antenna structure of the first embodiment of the present invention, which includes a pair of substantially semicircular arc-shaped radiators 11a and 11b (for example, made of copper or aluminum). The inner and outer edges of each arc radiator 11 can be semicircular or semielliptical. The two radiators 11a and 11b are arranged such that their circular arc vertices 21a and 21b face each other, and the feeding area 30 is arranged between the vertices 21a and 21b. The two semicircular radiators 11a and 11b have substantially semicircular notches 41a and 41b having a common center with them inside. When the radiators 11a and 11b are semicircular and the notches 41a and 41b are, for example, semielliptical with a major axis in the horizontal direction, the width W of the radiators 11a and 11b gradually decreases or increases along their both ends. When the notch has a major axis in the vertical direction, the width W of the radiato...
no. 2 example
[0083] Figure 12 A perspective view showing the antenna structure of the second embodiment of the present invention. The antenna in this embodiment is configured with two sets of antenna elements, one of which is for example referenced by figure 1 The pair of conductors 12 of this substantially semicircular disc described in the prior art 1b and 12 2b constitute. Disk conductor 12 1b and 12 2b Intersect perpendicularly so that their arc vertices are at the same location and their centerlines coincide with each other. Another set of antenna components consists of a pair of semicircular arc radiators 11 1a and 11 2a Each semicircular radiator is roughly semicircular and defines a reference Image 6 the notch. Radiator 11 1a and 11 2a Also vertically intersect, their arc vertices also remain at the same position shown by 21a, and their centerlines Ox also coincide with each other. Two sets of antenna parts are combined, and the radiator 11 1a 、11 2a and 12 1b 、12 ...
no. 3 example
[0085] Figure 13 Showing the perspective structure of the third embodiment of the present invention, it is quite shown in Image 6 with 7A dipole antenna is a monopole antenna. The antenna in this embodiment is composed of a substantially semicircular arc-shaped radiator 11 with a substantially semicircular notch 41 defined at its center and a plane conductor ground plate 50 . The radiator 11 is arranged such that its arc apex is adjacent to the plane conductor ground plate 50 but separated from each other. The apex 21 of the radiator 11 is used as a feed point, and the coaxial cable 31 used for feeding passes through the through hole arranged on the plane conductor ground plate 50, and its central conductor is connected to the apex 21 of the radiator 11, and its outer The conductors are connected to the ground plate 50 .
[0086] An experiment was carried out on the antenna structure of this embodiment, wherein the notch 41 defined at the center of the semicircle-arc rad...
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