A steerable beam antenna includes a feed line and first and second arrays of switchable scatterers along opposite sides of the feed line. The first array scatters an electromagnetic wave propagating through the feed line to form a first beam portion with a first polarization, and the second array scatters the propagating wave to form a second beam portion with a second polarization orthogonal to the first polarization. Each scatterer in the first and second arrays is switchable between a high state and a low state, the high state scatterers and the low-state scatterers in each of the first and second arrays defining a periodic pattern. The scatterers in the first and second arrays are switchable to shift the pattern of scatterers in one of the arrays relative to the pattern in the other array by a selectable period shift that yields a desired polarization for the beam.

Described embodiments provide sidelobe cancellation for Simultaneous Transmit and Receive systems. The sidelobe cancellation system includes an array having a primary aperture and an auxiliary array. The auxiliary array includes a plurality of antenna elements disposed adjacent to at least one side of the primary aperture. Each element of the auxiliary array is coupled to a variable attenuator, a variable phase shifter or a variable true time delay unit. A controller tunes the auxiliary array to cancel sidelobes of the primary aperture by adaptively selecting an attenuation value of the variable attenuator, a phase shift value of the variable phase shifter and a time delay value of the variable true time delay unit for each element of the auxiliary array. The auxiliary array operates as an adaptive finite-impulse response (FIR) filter with each antenna element of the auxiliary array operating as an adaptive tap of the adaptive FIR filter.

The disclosure concerns wireless communication systems, including antenna systems and related methods, which are each directed to utilizing one or more multi-mode antennas for the purpose of varying a radiation pattern characteristic thereof to enhance network security and communication link between an access point and one or more client devices on a network.

Examples disclosed herein relate to systems and methods for configuring and operating an antenna system. In accordance with various embodiments, the disclosed system and methods utilize amplitude tapering of an antenna array to reduce side lobe levels while optimizing main lobe gain. An antenna array is configured to increase a gain differential by reducing side lobe amplitude. The array of radiating elements is arranged to have a majority of elements at the center of the array with fewer elements on the edges.

An electronic device is provided. The electronic device may comprise a housing comprising: a front plate facing a first direction, a back plate facing a second direction opposite to the first direction, and a side surface which surrounds the front plate and the back plate, wherein the front plate includes a screen area and a bezel area; a display exposed through the screen area of the front plate; a first circuit board disposed between the display and the back plate and including a first surface facing the display and a second surface facing the back plate; a first antenna array overlaid on the bezel area in the first surface; a second antenna array disposed on the second surface; and a wireless communication circuit disposed on the first circuit board and electrically connected with the first antenna array and the second antenna array, wherein the wireless communication circuit is configured to: form a beam which has directionality in the first direction using the first antenna array and form a beam which has directionality in the second direction using the second antenna array.

An electronic device is provided. The electronic device may comprise a housing comprising: a front plate facing a first direction, a back plate facing a second direction opposite to the first direction, and a side surface which surrounds the front plate and the back plate, wherein the front plate includes a screen area and a bezel area; a display exposed through the screen area of the front plate; a first circuit board disposed between the display and the back plate and including a first surface facing the display and a second surface facing the back plate; a first antenna array overlaid on the bezel area in the first surface; a second antenna array disposed on the second surface; and a wireless communication circuit disposed on the first circuit board and electrically connected with the first antenna array and the second antenna array, wherein the wireless communication circuit is configured to: form a beam which has directionality in the first direction using the first antenna array and form a beam which has directionality in the second direction using the second antenna array.

A multi-antenna module includes, on or in the dielectric substrate, a first radiation element, a second radiation element that operates at a frequency band lower than that of the first radiation element, and a ground plane. A first feed line and a second feed line are provided on or in the dielectric substrate. A first switch element switches between a first state in which a signal is supplied to the second radiation element and a second state including at least one of a state in which the second radiation element is connected to the ground plane with terminal impedance interposed therebetween, a state in which the second radiation element is in a floating state with respect to the second feed line and the ground plane, and a state in which the second radiation element is short-circuited to the ground plane.

A method for determining a phase bias in the signal transmitted by at least one of the radiating elements of an active antenna on the ground emitting signals into space using a space-division multiple access SDMA method, implementing a step, for each reference receiver, of comparing, to a threshold, the difference between the value of a measurement of the power received by each reference receiver and the sum, out of the radiating elements of the subset beamforming in the direction of the reference receiver, of the differences between the equivalent isotropically radiated power in the direction of the reference receiver and the free-space path loss of each radiating element of the subset.

A method for suppressing a spurious signal in a payload signal supplied by a receiving antenna of a payload of a satellite. The satellite also includes an array of measurement antennas supplying measurement signals. The measurement signals are combined with the payload signal. Reference weighting coefficients for weighting the measurement signals are determined as a function of the combined signals. A reference beam is formed by combining the measurement signals weighted based on the reference weighting coefficients. Anti jamming weighting coefficients for weighting the payload signal and the reference beam are determined. An anti jammed beam is formed by combining the payload signal and the reference beam weighed based on the corresponding anti jamming weighting coefficients.

Provided are a radar system for a vehicle and a method for measuring an azimuth therein, which are capable of increasing target sensing and tracking reliability by blocking an error signal that is input from the ground where no vehicle exists or in the elevation angle direction. A system for blocking an error signal input from a ground or in an elevation angle direction includes: two or more main reception antennas; a single side lobe suppression antenna; and a radar configured to compare a magnitude of a main reception signal received from the main reception antenna with a magnitude of a side lobe suppression reception signal received from the side lobe suppression antenna, and measure an azimuth of a target by using the received main reception signal when the magnitude of the main reception signal is larger than the magnitude of the side lobe suppression reception signal.