[Object]

To improve accuracy of transmission and reception in antennas.

[Solving Means]

A radar apparatus includes multiple antennas, a power feeding circuit, and dummy antennas. The multiple antennas have a predetermined length in a first direction and are arranged in an array form in a second direction that intersects the first direction. The power feeding circuit is connected to the multiple antennas. The dummy antennas have a length different from the predetermined length and are arranged so as to sandwich the multiple antennas in the second direction.

[Object]

To improve accuracy of transmission and reception in antennas.

[Solving Means]

A radar apparatus includes multiple antennas, a power feeding circuit, and dummy antennas. The multiple antennas have a predetermined length in a first direction and are arranged in an array form in a second direction that intersects the first direction. The power feeding circuit is connected to the multiple antennas. The dummy antennas have a length different from the predetermined length and are arranged so as to sandwich the multiple antennas in the second direction.

An electromagnetic channel emulator system is disclosed. The system includes an electromagnetic switch matrix sub-system communicatively coupled to one or more systems under test and one or more simulation control layers. The system may include a high performance computing layer including one or more processing element nodes. The electromagnetic switch matrix sub-system may include one or more electromagnetic systems under test input/output layers and one or more high performance computing input/output layers. The one or more input/output layers may include one or more signal converters. The electromagnetic switch matrix sub-system may include one or more switches communicatively coupled to the one or more input/output layers and the high performance computing layer. The one or more switches may be configured to selectively position the one or more analog signals based on the received one or more simulation control layer signals.

A method for simulating electromagnetic interactions between an antenna with a reflecting front face and at least one electromagnetic radiator and an electrically large interaction structure placed in front of the antenna comprises providing an antenna model representing the antenna, the antenna model comprising an antenna surface representing the front face and at least one field source representing the at least one radiator, wherein the field source is placed at the antenna surface and is configured as a far field source that is defined by a predetermined radiation pattern, and wherein direct electromagnetic interaction between the field source and the antenna surface is avoided. The method further comprises determining electromagnetic radiation launched by the field source based on the predetermined radiation pattern, propagating the radiation using an asymptotic numerical method, and determining interactions of the radiation with the interaction structure and with the antenna surface.

A method for simulating electromagnetic interactions between an antenna with a reflecting front face and at least one electromagnetic radiator and an electrically large interaction structure placed in front of the antenna comprises providing an antenna model representing the antenna, the antenna model comprising an antenna surface representing the front face and at least one field source representing the at least one radiator, wherein the field source is placed at the antenna surface and is configured as a far field source that is defined by a predetermined radiation pattern, and wherein direct electromagnetic interaction between the field source and the antenna surface is avoided. The method further comprises determining electromagnetic radiation launched by the field source based on the predetermined radiation pattern, propagating the radiation using an asymptotic numerical method, and determining interactions of the radiation with the interaction structure and with the antenna surface.

Provided are a directional pattern calculation method and apparatus for a beam pointing adjustable antenna. In the design method, key control factors are quantized, for example, a arrangement and combination modes for a plurality of slot units and wave-controlled codes for conducting and cut-off states of a slot unit, and different combinations of slot units and a far-field directional pattern of a controlled array antenna are evaluated, so that electrical performance indicators of the array antenna can be further evaluated. Weighting calculation is implemented for a directional pattern of a beam pointing adjustable antenna. Key information such as a form of a slot unit and a arrangement and combination modes for slot units can be globally optimized. Optimization on selection, a permutation, a combination, a spacing, and the like of slot units is greatly saved during antenna design, so as to focus on design of a structural form of a slot unit. In addition, wave controlled codes for conducting and cut off states corresponding to each slot unit may be further calculated according to a beam directivity deflection requirement, to provide guidance for beam directivity control and implement fast beam forming and switching.

A method for simulating electromagnetic interactions between an antenna with a reflecting front face and at least one electromagnetic radiator and an electrically large interaction structure placed in front of the antenna comprises providing an antenna model representing the antenna, the antenna model comprising an antenna surface representing the front face and at least one field source representing the at least one radiator, wherein the field source is placed at the antenna surface and is configured as a far field source that is defined by a predetermined radiation pattern, and wherein direct electromagnetic interaction between the field source and the antenna surface is avoided. The method further comprises determining electromagnetic radiation launched by the field source based on the predetermined radiation pattern, propagating the radiation using an asymptotic numerical method, and determining interactions of the radiation with the interaction structure and with the antenna surface.

A method for simulating electromagnetic interactions between an antenna with a reflecting front face and at least one electromagnetic radiator and an electrically large interaction structure placed in front of the antenna comprises providing an antenna model representing the antenna, the antenna model comprising an antenna surface representing the front face and at least one field source representing the at least one radiator, wherein the field source is placed at the antenna surface and is configured as a far field source that is defined by a predetermined radiation pattern, and wherein direct electromagnetic interaction between the field source and the antenna surface is avoided. The method further comprises determining electromagnetic radiation launched by the field source based on the predetermined radiation pattern, propagating the radiation using an asymptotic numerical method, and determining interactions of the radiation with the interaction structure and with the antenna surface.

Provided herein are an electronic device and a method for controlling the electronic device, the electronic device including a display including a main display area arranged on a front surface of the electronic device and a sub display area that extends from one side of the main display area and arranged on at least one area of a rear surface of the electronic device; a receiver including audio output circuitry configured to output audio received from an external terminal; a display antenna located on one or more of the main display area and the sub display area, and configured to perform communication with an external terminal; and a processor configured to control the display antenna based on a network state or a type of an application being executed.

Provided herein are an electronic device and a method for controlling the electronic device, the electronic device including a display including a main display area arranged on a front surface of the electronic device and a sub display area that extends from one side of the main display area and arranged on at least one area of a rear surface of the electronic device; a receiver including audio output circuitry configured to output audio received from an external terminal; a display antenna located on one or more of the main display area and the sub display area, and configured to perform communication with an external terminal; and a processor configured to control the display antenna based on a network state or a type of an application being executed.