Automobile antenna system
First Claim
1. An automobile antenna system for detecting surface currents induced on a vehicle body by broadcast waves, said system comprising:
- electrostatic shielding case means mounted on the vehicle body and having an opening formed therein to be opposed to an edge portion of a metallic plate forming the vehicle body; and
high-frequency pickup means for detecting the surface currents induced on the vehicle body and including a rectangular loop antenna housed within said electrostatic shielding case means and positioned in close proximity to said opening, said loop antenna including a plane of the loop arranged relative to the surface of said metallic plate of said vehicle body at an angle in the range of 90 degrees to 135 degrees or 225 degrees to 270 degrees.
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Accused Products
Abstract
The present invention provides an autombile antenna system for detecting surface currents induced on the vehicle body by radio waves. The antenna system includes an electrostatic shielding case mounted on the vehicle body and having an opening formed therein. The opening in the case faces a metallic plate in the vehicle body and a loop antenna is housed within the case and disposed in close proximity to the opening thereof. The loop antenna has a plane of the loop positioned relative to the surface of the metallic vehicle plate at an angle in the range of 90 degrees to 135 degrees or 225 degrees to 270 degrees, whereby the antenna system can more efficiently detect the surface currents induced on the vehicle body by radio waves and can be miniaturized and improved in performance without any externally protruding member.
34 Citations
12 Claims
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1. An automobile antenna system for detecting surface currents induced on a vehicle body by broadcast waves, said system comprising:
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electrostatic shielding case means mounted on the vehicle body and having an opening formed therein to be opposed to an edge portion of a metallic plate forming the vehicle body; and high-frequency pickup means for detecting the surface currents induced on the vehicle body and including a rectangular loop antenna housed within said electrostatic shielding case means and positioned in close proximity to said opening, said loop antenna including a plane of the loop arranged relative to the surface of said metallic plate of said vehicle body at an angle in the range of 90 degrees to 135 degrees or 225 degrees to 270 degrees. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification