First Rf Corporation

Arian C Lalezari

Farzin Lalezari

Michael Robert Markey

Michael R Goulder

Dean A Paschen

An antenna system includes a plurality of antenna elements arranged in an array having a plurality of array elements. Each antenna element has a radiator extending from a radiator feed end to a radiator terminal end, where a first straight-line distance from the radiator feed end to the radiator terminal end is less than λ/4, λ being a longest wavelength of a bandwidth of the antenna element. Each antenna element also includes a counterpoise extending from a counterpoise feed end to a counterpoise terminal end, where a second straight-line distance from the counterpoise feed end to the counterpoise terminal end is less than λ/4. The counterpoise feed end is spaced apart from the radiator feed end. The radiator and the counterpoise diverge at an acute angle from an area encompassing the radiator feed end and the counterpoise feed end.

Antenna element and arrays thereof

A method for controlling an antenna array includes determining, based on a beamstate, an initial weight vector of excitations. The initial weight vector is transformed into an active-impedance vector. When the modulus of any element of the active-impedance vector exceeds a threshold, the initial weight vector is unsafe. In this case, a substitute weight vector is identified such that (i) the initial and substitute weight vectors have a similarity measure that exceeds a similarity threshold and (ii) the substitute weight vector is safe. The antenna array may then be driven according to the substitute weight vector to emit radiation having a radiation pattern that approximates that of the beamstate. The substitute weight vector may be found by searching a library of safe weight vectors or by adjusting the excitations of the initial weight vector until a safe alternative is found.

High-power transmit beamforming with impedance-mismatched antenna arrays

An antenna element is provided that is adapted to provide a more consistent horizontally polarized signal. In one embodiment, a radiator and counterpoise are provided with the counterpoise being disposed between the radiator and a ground plane in use. The feed location for feeding the radiator and the counterpoise is significantly spaced from the ground plane in use and the radiator and counterpoise diverge relative to this feed location.

Antenna element

The invention is directed to a broadband, low-profile antenna structure that in one embodiment includes a compound radiator and a ground plane. The compound radiator is comprised of a dipole radiator portion and a Vivaldi radiator portion that is electrically connected to the dipole radiator portion. In operation, the dipole radiator portion operates in the lower end of the bandwidth and the Vivaldi radiator portion operates in the upper end of the bandwidth.

Broadband, low-profile antenna structure

The present invention is directed to a monopole/dipole symmetric radiator structure that includes a symmetric planar radiator. When the symmetric radiator is part of an operative monopole or dipole antenna, the antenna exhibits a wide or broad bandwidth, a VSWR of less than about 3:1, a relatively constant gain perpendicular or broad-side to the plane of the radiator, and is vertically polarized. In one embodiment, the symmetric planar radiator has an outer edge that is bilaterally symmetrical. In another embodiment, the outer edge of the symmetric planar radiator is bilaterally symmetric and a closed inner edge of the radiator that defines a void is also bilaterally symmetric.

Symmetric planar radiator structure for use in a monopole or dipole antenna

The present invention is directed to a monopole/dipole asymmetric radiator structure that includes an asymmetric planar radiator. When the asymmetric is part of an operative monopole or dipole antenna, the antenna exhibits a wide or broad bandwidth, a VSWR of less than about 3:1, a relatively constant gain perpendicular or broad-side to the plane of the radiator, and is vertically polarized. In one embodiment, asymmetric planar radiator has an outer edge that is bilaterally asymmetrical. In another embodiment, the outer edge of the asymmetric planar radiator is symmetric and a closed inner edge of the radiator that defines a void is bilaterally asymmetric.

Growing community of inventors

Boulder, CO, United States of America

Arian C Lalezari