Summary
International Symposium on Electromagnetic Compatibility
2009
Session Number:23R2
Session:
Number:23R2-4
Improvement of a Tear Drop-Shaped Antenna with an Optical Feeding Using a Dielectric Reinforcement
S. Inoue, H. Abe, M.Tokuda, S. Ishigami,
pp.607-610
Publication Date:2009/7/20
Online ISSN:2188-5079
Summary:
A tear drop-shaped antenna combined spherical and biconical antenna elements had been developed in order to obtain the radiated wideband emission source having directivity specified by CISPR 16-1-4 Ed.2 above 1 GHz. In this paper, an improved tear drop-shaped antenna using a dielectric reinforcement was proposed. The effect of the reinforcement that was made from acrylic fiber (permittivity=3.0) is calculated by the finite integration (FI) method. The calculated result was compared with the measured ones. The upper and lower element of the tear drop-shape antenna is reinforced by a cylindrical acrylic fiber of which thickness is 30 mm. The tear drop-shaped antenna with no reinforcement (conventional model) did not meet the requirement of CISPR standard. In contrast, E-plane radiation patterns obtained by the calculation and measurement were improved at θ=0 and 180 degrees in the case of the tear drop-shaped antenna with the reinforcement mentioned above. The tear drop-shaped antenna with the proposed reinforcement satisfies the directivity specified in CISPR 16-1-4 Ed.2 in a frequency range from 1 GHz to 6 GHz.