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US 5,966,097 AGranted
Antenna apparatus
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsToru Fukasawa, Isamu Chiba, Tsutomu Endo, Shin-ichi Satoh, Shuji Urasaki
Life of this patent
Estimating the term…
Abstract
A non-driven first linear element is disposed in the vicinity of an inverted-F second linear antenna element. The driven second linear element is disposed over a conductive plate having a flat shape, in such a manner as to be substantially parallel to the inverted-F antenna. The non-driven element has a short-circuited end of the inverted-F antenna, and has substantially the same resonant frequency as that of the inverted-F antenna.
Claims12
An antenna apparatus comprising:
- a conductive plate having the shape of a flat plate;
- a first linear conductor disposed over said conductive plate substantially in parallel therewith, having an electrical length of an about 1/4 wavelength of a frequency used, and having one end short-circuited with said conductive plate and another end open;
- and
- a second linear conductor which is disposed over said conductive plate so as to be substantially parallel to but not coaxial with said first linear conductor and substantially parallel to said conductive plate, has an electrical length of an about 1/4 wavelength of the frequency used, and has one end, located on a side away from the short-circuited end of said first linear conductor, short-circuited with said conductive plate and another end open,
- wherein feeding is effected between said conductive plate and a point between the short-circuited end and the open end of said second linear conductors.
2 more elements
An antenna apparatus comprising:
- a conductive plate having the shape of a flat plate;
- a first linear conductor disposed over said conductive plate substantially in parallel therewith and having an electrical length of an about 1/2 wavelength of a frequency used;
- and
- a second linear conductor which is disposed over said conductive plate in such a manner as to be substantially parallel to but not coaxial with said first linear conductor and substantially parallel to said conductive plate, has an electrical length of an about 1/4 wavelength of the frequency used, and has one end short-circuited with said conductive plate and another end open,
- wherein feeding is effected between said conductive plate and a point between the short-circuited end and the open end of said second linear conductor having the electrical length of an about 1/4 wavelength.
2 more elements
Dependencies are inferred from the claim text.