| 摘要 |
PURPOSE:To reduce transmission loss and to improve the gain of an antenna by laminating a radiation circuit board and a feeder circuit on dielectric layers consisting of polyethylene to constitute the circuit board for the antenna. CONSTITUTION:In a tri-plate structure having the feature of dielectric layer consisting of polyethylene, a microstrip line or slot 3 consisting of metallic foil is arranged on the surface of a dielectric body 1 to constitute the radiation circuit board A. A microstrip line 3' is arranged on the other dielectric layer 1 as an intermediate layer to form the power supply circuit board B. These boards A, B and a ground conductor 2 are laminated to constitute the circuit board 4 for an antenna. A plane antenna is consituted of the board 4, a converter 5 and a cover 6. Since the dielectric layers consist of polyethylene, the plane antenna reduced at its transmission loss and having high gain as an atenna can be obtained.
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