Microwave plane antenna
AssigneeMatsushita Electric Works, Ltd.
InventorsYoshihiro Kitsuda, Toshio Abiko, Kyoji Masamoto, Katsuya Tsukamoto
Life of this patent
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Abstract
A microwave plane antenna comprising antenna body including a plurality of conductive microstrip lines covered with a plastic film and a polyolefin series dielectric layer provided along the microstrip lines for lowering SHF band transmission loss while elevating reception gain. The antenna is enclosed in a plastic cover which includes portions constructed to permit the passage of microwaves while imparting appreciable strength to the cover.
Claims6
A microwave plane antenna comprising an antenna body including a plurality of rows of microstrip lines covered on one surface by a plastic sheet and joined on another surface with a layer of a dielectric material, a layer of a grounding conductor material joined to said layer of dielectric material, said dielectric layer restraining SHF band transmission loss for providing a high reception gain, a current feeding circuit connected to said microstrip lines, and means including a plastic cover enclosing therein said antenna body, wherein said plastic cover comprising permeable regions permeable to incident microwaves and impermeable regions impermeable to said microwaves, said permeable regions being made of a composite member comprised of a plastic sheet having a thickness less than 1 mm and a backing layer of a foamed plastic having a foaming extent of 5 to 50 times and 2 to 50 mm thick, said impermeable regions being of higher mechanical strength than said permeable regions.
Dependencies are inferred from the claim text.