A method for obtaining an adaptive angle-Doppler ambiguity function (AF) for a target using multiple-input-multiple-output (MIMO) radar that includes a transmit antenna array having a plurality of antenna elements. The method includes generating transmit signals for transmission by the transmit antenna array, the transmit signals defining at least a first transmit trajectory of a phase center within the transmit antenna array; transmitting the transmit signals using the transmit antenna array and receiving receive signals from the target, the receive signals resulting from the incidence of the transmit signals upon the target; and obtaining at least an angle-Doppler ambiguity function (AF) from the receive signals. The first transmit trajectory is such that, in operation, the phase center undergoes random phase center motion (PCM), such that a phase center position within the transmit antenna array varies randomly with time. A system for obtaining an AF is also disclosed.

An electronic device according to an embodiment of the present invention may include a housing and an antenna module disposed on one surface of the housing, wherein the antenna module may include a printed circuit board including a first layer facing the one surface of the housing, a second layer facing the first layer, and at least one ground layer disposed between the first layer and the second layer, a first antenna array disposed on the first layer, a second antenna array disposed on the second layer and at least partially overlapping the first antenna array when viewed from the one surface of the housing, and a communication circuit (radio frequency integrated circuit (RFIC)) electrically connected to the first antenna array and the second antenna array and feeding the first antenna array and the second antenna array, wherein the communication circuit may be configured to receive a first signal from an external device via at least one of the first antenna array or the second antenna array, change a phase of at least a portion of the first antenna array and the second antenna array based on the first signal, and transmit/receive a second signal in a direction of a beam formed by the changed phase. Other various embodiments could be derived from the description.

A first antenna array includes antenna panels including: first antenna panels arranged on a first circle having a first radius, each of the first antenna panels including antenna elements; and second antenna panels arranged on a second circle having a second radius, each of the second antenna panels including antenna elements, the second circle being concentric with the first circle at a center point, the second antenna panels being arranged at a first angle around the center point with respect to the first antenna panels, the first radius, the second radius, and the first angle being computed in accordance with wireless transmission conditions including: a line-of-sight distance to a second antenna array including third antenna panels arranged on two or more circles; and a carrier frequency of a line-of-sight wireless transmission between the first antenna array and the second antenna array.

An antenna structure and a mobile device including the same are provided. The mobile includes a metal back cover and an antenna structure. The metal back cover has an open slot. The antenna structure includes a feeding metal radiator, a first grounded metal radiator, a second grounded metal radiator, and a substrate. The feeding metal radiator includes a first radiating portion, a first connecting portion, a second radiating portion and a feeding portion. The first radiating portion extends along a second direction from one side of the opening slot. The second radiating portion is coupled with the first radiating portion through the first connecting portion. The feeding portion is connected to the second radiating portion and extends along the second direction from one side of the open slot.

An antenna structure and a mobile device including the same are provided. The mobile includes a metal back cover and an antenna structure. The metal back cover has an open slot. The antenna structure includes a feeding metal radiator, a first grounded metal radiator, a second grounded metal radiator, and a substrate. The feeding metal radiator includes a first radiating portion, a first connecting portion, a second radiating portion and a feeding portion. The first radiating portion extends along a second direction from one side of the opening slot. The second radiating portion is coupled with the first radiating portion through the first connecting portion. The feeding portion is connected to the second radiating portion and extends along the second direction from one side of the open slot.

Antenna arrays with separate resonances and termination networks for multiple millimeter wave frequency bands are provided herein. In certain embodiments, an antenna array includes a first antenna element that receives the first radio frequency transmit signal at an input. The first antenna element has a first resonant mode and a second resonant mode. The antenna array further includes a first termination network connected to the input of the first antenna element and a second termination network connected to the input of the first antenna element.

An elongate antenna assembly (1) for an aircraft including a structural section (3) and an antenna element (5), wherein the structural section (3) includes an elongate leading edge section (7) extending in a longitudinal direction (13) of the antenna assembly, a first lateral section (9), and a second lateral section (11), wherein the leading edge section (7) is curved such that the leading edge section (7) comprises a convex outer surface (15) extending in the longitudinal direction (13) of the antenna assembly (1) on a convex side (19) of the antenna assembly.

A transportable, resilient, high frequency system with a compact footprint is provided. The system may include a plurality of antenna elements arranged around a circle. A circular array provides a resilient radiation pattern that does not change based on the number of antennas in the array and is tolerant of errors in antenna placement. The gain of the system may be increased by increasing the number of antenna elements in the array to compensate for reduced efficiency of antenna elements having a radiating element with a length of less than half the wavelength of an operating frequency of the array.

A first antenna array includes antenna panels including: first antenna panels arranged on a first circle having a first radius, each of the first antenna panels including antenna elements; and second antenna panels arranged on a second circle having a second radius, each of the second antenna panels including antenna elements, the second circle being concentric with the first circle at a center point, the second antenna panels being arranged at a first angle around the center point with respect to the first antenna panels, the first radius, the second radius, and the first angle being computed in accordance with wireless transmission conditions including: a line-of-sight distance to a second antenna array including third antenna panels arranged on two or more circles; and a carrier frequency of a line-of-sight wireless transmission between the first antenna array and the second antenna array.

Provided is a rapid over-the-air (OTA) production line test platform, including a device under test (DUT), an antenna array and two reflecting plates. The DUT has a beamforming function. The antenna array is arranged opposite to the DUT, and emits beams with beamforming. Two reflecting plates are disposed opposite to each other, and are arranged between the DUT and the antenna array. The beam OTA test of the DUT is carried out by propagation of the beams between the antenna array, the DUT and the two reflecting plates. Accordingly, the test time can be greatly shortened and the cost of test can be effectively reduced. In addition to the above-mentioned rapid OTA production line test platform, platforms for performing the OTA production line test by using horn antenna arrays together with bending waveguides and using a 3D elliptic curve are also provided.