Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
128 words
A multimode turnstile antenna capable of having simultaneously a vertically polarized omnidirectional pattern, a right hand circularly polarized omnidirectional pattern and a left hand circularly polarized omnidirectional pattern comprising: four coaxial transmission lines disposed in a vertical parallel relationship, each of said coaxial lines including an inner conductor and an outer conductor; a frusto-conical member having its smaller diameter end disposed adjacent the upper end of said coaxial lines to electrically and physically interconnect said outer conductors of all said coaxial lines; and four members disposed adjacent said upper end of said coaxial lines, each of said members being coupled to said center conductor of a different one of said coaxial lines and extending outwardly at an angle with respect to the associated one of said coaxial lines.
Claim 2
Dependent Claim
128 words
A multimode turnstile antenna capable of having simultaneously a vertically polarized omnidirectional pattern, a right hand circularly polarized omnidirectional pattern and a left hand circularly polarized omnidirectional pattern comprising: four coaxial transmission lines disposed in a vertical parallel relationship, each of said coaxial lines including an inner conductor and an outer conductor; a frusto-conical member having its smaller diameter end disposed adjacent the upper end of said coaxial lines to electrically and physically interconnect said outer conductors of all said coaxial lines; and four members disposed adjacent said upper end of said coaxial lines, each of said members being coupled to said center conductor of a different one of said coaxial lines and extending outwardly at an angle with respect to the associated one of said coaxial lines.
Claim 3
Dependent Claim
17 words
An antenna according to claim 1, wherein said members are orthogonally related with respect to each other.
Claim 4
Dependent Claim
31 words
An antenna according to claim 2, wherein each of said coaxial lines are excited by inphase energy and simultaneously each of said coaxial lines are excited by different orthogonally related energy.
Claim 5
Dependent Claim
27 words
An antenna according to claim 2, wherein each of said members have a length equal to approximately one quarter wavelength at the operating frequency of said antenna.
Claim 6
Dependent Claim
28 words
An antenna according to claim 2, wherein the side of said frusto-conical member has a length greater than one quarter wavelength at the operating frequency of said antenna.
Claim 7
Dependent Claim
263 words
An antenna according to claim 2, further including a first balanced hybrid having a first balanced port, a first inphase port, a first port coupled to said center conductor of A first of said coaxial lines and a second port coupled to said center conductor of a second of said coaxial lines diagonally disposed with respect to said first of said coaxial lines, said first port being responsive to first energy, said second port being responsive to said first energy having a 180* phase relationship with said first energy at said first port and said first and second ports simultaneously being responsive to inphase second energy; a second balanced hybrid having a second balanced port, a second inphase port, a third port coupled to said center conductor of a third of said coaxial lines and a fourth port coupled to said center conductor of a fourth of said coaxial lines diagonally disposed with respect to said third of said coaxial lines, said third port being responsive to said first energy having a -90* phase relationship with said first energy at said first port, said fourth port being responsive to said first energy having a +90* phase relationship with said first energy at said first port and said third and fourth ports simultaneously being responsive to said inphase second energy; third means connected in common to said first and second inphase ports; and a quadrature hybrid having a fifth port, a sixth port, a 0* phase port coupled to said first balanced port and a 90* phase port coupled to said second balanced port.
Claim 8
Dependent Claim
14 words
An antenna according to claim 6, wherein said third means includes a power divider.