The present disclosure relates to a communication method and system for converging a 5.sup.th-Generation (5G) communication system for supporting higher data rates beyond a 4.sup.th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. According to an embodiment o, an antenna device in a wireless communication system includes: an antenna module; and a radome covering at least a part of the antenna module, wherein the antenna module includes a first radiator disposed on one surface of the radome and at least one second radiator spaced apart from the first radiator by a specified distance on the one surface to form a loop of the first radiator, wherein the at least one second radiator includes a plurality of gaps opening each of the loops.

An apparatus includes a housing and a circuit including an inductor and at least one capacitor in electrical communication with the inductor. The circuit has a resonance frequency and bounds a non-electrically-conductive region of the housing. The circuit is configured to be operable as an antenna.

A radar sensing system for a vehicle includes a radar sensor disposed at the vehicle so as to sense exterior of the vehicle. The radar sensor includes a plurality of transmitters that transmit radio signals and a plurality of receivers that receive radio signals. The received radio signals are transmitted radio signals that are reflected from an object. A processor is operable to process an output of the receivers. The radar sensor includes a printed circuit board having circuitry disposed thereat. The radar sensor includes a radome. At least some of the antennas are embedded or encapsulated in the radome.

A radome having an integrated antenna array and an antenna assembly having the same are described herein. A method for fabricating a radome having an integrated antenna array is also described herein. In one example, a radome is provided that includes a radome shell and an antenna array. The antenna array has a radiating surface and a backside surface. The radome shell is affixed to the antenna array forming an independent unitary structure separable from other components of an antenna assembly.

An antenna arrangement for an aircraftincludes an antenna unit, a radome structure covering the antenna unit, and a mounting device for mounting the antenna arrangement to an outer surface of an aircraft component. The antenna unit is mounted to or integrally formed with the radome structure and the radome structure is mounted to or integrally formed with the mounting device.

A waveguide polarizer for converting between a linearly polarized electromagnetic field in a first waveguide and a circularly polarized electromagnetic field in a second waveguide is provided. The waveguide polarizer includes a structure interconnecting the first and second waveguide which includes a waveguide excitation arrangement with a bifilar helical shape. A circularly polarized antenna arranged to be connected to the first waveguide of the waveguide polarizer and a satellite arrangement are also provided.

Methods and apparatuses for performing optical inspection of varactor diodes in an antenna are disclosed. In some embodiments, the method of testing an antenna having varactor diodes comprises: selecting a plurality of varactor diodes to be placed in a light emitting state; forward biasing the selected varactor diodes to a magnitude at which the selected varactor diodes are to emit light; and detecting one or more faulty varactor diodes of the selected varactor diodes based on their emitted light intensity.

A radar sensor. The radar sensor includes a high-frequency component situated on a circuit board and a waveguide structure, which is connected via a coupling structure to the high-frequency component. The waveguide structure is formed in a mold, which is injection molded to a part of the circuit board supporting the high-frequency component.

An antenna for a ground-penetration radar system is disclosed. The antenna has a housing that defines a cavity. A radiator is located on a surface of a planar substrate within the cavity. A wear-block is located between the radiator and the opening to the cavity for providing mechanical protection to the radiator. An absorber assembly is located on an opposite side of the radiator from the opening. The absorber assembly comprises a microwave absorber and a first dielectric layer. The first dielectric layer is located between the radiator and the microwave absorber.

An antenna stack structure according to an embodiment includes a lower dielectric layer, an antenna electrode layer formed on the lower dielectric layer, and an upper dielectric layer disposed on the antenna electrode layer. A dielectric constant of the upper dielectric layer is 1 or more and less than 7, and a thickness of the upper dielectric layer is in a range from 100 μm to 1,300 μm. A frequency and a band width are finely controlled using the upper dielectric layer while suppressing excessive gain reduction and frequency shift.