Planar antenna
First Claim
Patent Images
1. A planar antenna comprising a porous dielectric layer comprising at least one polymer selected from the group consisting of a 3-methylbutene-1homopolymer, a copolymer of 3-methylbutene-1 and an α
- -olefin having from 2 to 12 carbon atoms, a copolymer of 3-methylbutene-1and a polyene, a copolymer of 3-methylbutene-1, said α
-olefin and said polyene, and a modified polymer obtained by graft-polymerizing a radically polymerizable monomer to each of said homopolymer and said copolymers;
a conductor on one of the surfaces of said dielectric layer; and
a circularly polarized radiation microstrip element on the other surface of said dielectric layer which is formed from a metal foil;
said porous dielectric layer being produced by molding a mixture comprising 20 to 70% by weight of at least one polymer selected from the group consisting of said homopolymer, said copolymers and said modified polymer and 30 to 80% by weight of at least one plasticizer selected from the group consisting of an aliphatic compound, an aromatic compound, an aliphatic mineral oil and an aromatic mineral oil at a temperature of from 260°
to 320°
C. into a sheet form, and then subjecting the sheet to extraction with a low-boiling solvent.
2 Assignments
0 Petitions
Accused Products
Abstract
A planar antenna comprising a dielectric layer containing a homopolymer of 3-methylbutene-1 or a copolymer of 3-methylbutene-1 and an alpha-olefin of from 2 to 12 carbon atoms, a polyene or a mixture thereof, a conductor laminated on the whole back surface of said dielectric layer and a circularly polarized radiation microstrip element formed from a metal foil and provided on the other surface of said dielectric layer.
15 Citations
15 Claims
-
1. A planar antenna comprising a porous dielectric layer comprising at least one polymer selected from the group consisting of a 3-methylbutene-1homopolymer, a copolymer of 3-methylbutene-1 and an α
- -olefin having from 2 to 12 carbon atoms, a copolymer of 3-methylbutene-1and a polyene, a copolymer of 3-methylbutene-1, said α
-olefin and said polyene, and a modified polymer obtained by graft-polymerizing a radically polymerizable monomer to each of said homopolymer and said copolymers;
a conductor on one of the surfaces of said dielectric layer; and
a circularly polarized radiation microstrip element on the other surface of said dielectric layer which is formed from a metal foil;
said porous dielectric layer being produced by molding a mixture comprising 20 to 70% by weight of at least one polymer selected from the group consisting of said homopolymer, said copolymers and said modified polymer and 30 to 80% by weight of at least one plasticizer selected from the group consisting of an aliphatic compound, an aromatic compound, an aliphatic mineral oil and an aromatic mineral oil at a temperature of from 260°
to 320°
C. into a sheet form, and then subjecting the sheet to extraction with a low-boiling solvent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- -olefin having from 2 to 12 carbon atoms, a copolymer of 3-methylbutene-1and a polyene, a copolymer of 3-methylbutene-1, said α
Specification