Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
187 words
A directive antenna comprising a substantially V-shaped dipole including first and second curved conductors diverging from opposite sides of a line of symmetry extending from an apex of the dipole in a predetermined direction of radiation, said V-shaped dipole comprising: (a) a feed point at the apex of the dipole; (b) a first section extending from the apex, where the distance and the angle between the conductors are sufficiently small that radiation from said section is minimized and is primarily in an upper frequency range of the antenna; and (c) a second section extending from the first section, where each of said curved conductors comprises successive portions connecting in series a plurality of capacitive reactances at predetermined positions along the length of the respective conductor, the capacitive reactance at each position having a value which, for the angle between the line of symmetry and the respective conductor at said position, effects production of a respective predetermined phase velocity, said predetermined phase velocities increasing with distance from the apex of the dipole such that radiation from different positions is substantially in phase in the predetermined direction of radiation.
Claim 2
Dependent Claim
187 words
A directive antenna comprising a substantially V-shaped dipole including first and second curved conductors diverging from opposite sides of a line of symmetry extending from an apex of the dipole in a predetermined direction of radiation, said V-shaped dipole comprising: (a) a feed point at the apex of the dipole; (b) a first section extending from the apex, where the distance and the angle between the conductors are sufficiently small that radiation from said section is minimized and is primarily in an upper frequency range of the antenna; and (c) a second section extending from the first section, where each of said curved conductors comprises successive portions connecting in series a plurality of capacitive reactances at predetermined positions along the length of the respective conductor, the capacitive reactance at each position having a value which, for the angle between the line of symmetry and the respective conductor at said position, effects production of a respective predetermined phase velocity, said predetermined phase velocities increasing with distance from the apex of the dipole such that radiation from different positions is substantially in phase in the predetermined direction of radiation.
Claim 3
Dependent Claim
43 words
A directive antenna as in claim 1, where the first section of the dipole includes phase-velocity-reducing means for reducing the phase velocity and displacing the phase center, at the upper frequency range of the antenna, in a direction away from the feed point.
Claim 4
Dependent Claim
23 words
A directive antenna as in claim 2, where the phase-velocity-reducing means comprises a dielectric disc extending into a gap between the dipole conductors.
Claim 5
Dependent Claim
21 words
A directive antenna as in claim 3, where the dielectric disc is generally V-shaped and fills the gap between the conductors.
Claim 6
Dependent Claim
21 words
A directive antenna as in claim 3 or 4, where the dielectric disc extends into the second section of the dipole.
Claim 7
Dependent Claim
22 words
A directive antenna as in claim 1, 2, 3 or 4, where the phase-velocity-reducing means comprises nonlinear shaped portions of the conductors.
Claim 8
Dependent Claim
46 words
A directive antenna as in claim 1, 2, 3 or 4, where the successive portions of the conductors connecting in series the capacitive reactances have differing lengths, each length corresponding to a half wavelength of a respective frequency within the operating frequency range of the antenna.
Claim 9
Dependent Claim
42 words
A directive antenna as in claim 7 where the capacitance values of the successive capacitive reactances decrease with distance from the apex of the dipole, and where the lengths of the successive portions of the conductors increase with distance from said apex.
Claim 10
Dependent Claim
31 words
A directive antenna as in claim 1, 2, 3 or 4, where each of the conductors includes a resistive portion near an end thereof remote from the apex of the dipole.
Claim 11
Dependent Claim
46 words
A directive antenna as in claim 1, 2, 3 or 4, where the conductors comprise conductive strips disposed on opposite sides of a dielectric disc, the series capacitive reactances being formed by overlapping portions of the conductive strips situated on opposite sides of the dielectric disc.
Claim 12
Dependent Claim
24 words
A directive antenna as in claim 10 where the portions of the conductive strips disposed between the series capacitive reactances have reduced area sections.