The present invention relates to a communication technique for fusing a 5G communication system to support a higher data transmission rate than a 4G system, with IoT technology, and a system thereof. In addition, the present invention provides an antenna module comprising: a first plate which forms an upper surface of the antenna module and has a first opening surface on one side surface, a second plate which forms a side surface of the antenna module, forms a first angle with the first plate in contact with the first plate, and has a second opening surface on one side surface so as to extend the first opening surface, and a power supply unit which has one surface electrically connected to the first plate and is disposed on the first opening surface or the second opening surface.

According to a first aspect of the present invention, there is provide a method of electronically signing content. Content to be signed and an attribute sharing item are presented at a signing device associated with a signer. It is detected that the signer has accessed the attribute sharing item to provide one or more identity attributes which uniquely identify the signer. It is also detected that the signer has initiated a signing action at the signing device. The signing action and the identity attributes are transmitted to a signing service which is configured to create an electronic signature including encrypting the content to be signed and the one or more identity attribute.

According to a first aspect of the present invention, there is provide a method of electronically signing content. Content to be signed and an attribute sharing item are presented at a signing device associated with a signer. It is detected that the signer has accessed the attribute sharing item to provide one or more identity attributes which uniquely identify the signer. It is also detected that the signer has initiated a signing action at the signing device. The signing action and the identity attributes are transmitted to a signing service which is configured to create an electronic signature including encrypting the content to be signed and the one or more identity attribute.

A deployable reflector for an antenna is disclosed. The deployable reflector comprises a deployable membrane configured to adopt a pre-formed shape in a deployed configuration, and an electrically conductive mesh disposed on a surface of the membrane wherein the electrically conductive mesh is configured to permit relative lateral movement between the electrically conductive mesh and the membrane during deployment of the reflector. In the deployed configuration, the conductive mesh adopts the shape of the membrane and forms a reflective surface of the reflector. A method of manufacturing the deployable reflector is also disclosed.

The present invention is a unique process of manufacturing rigid members with precise “shape keeping” properties and with reflective properties pertaining to radio frequency energy, so that air, land, sea and space devices or vehicles may be constructed including parabolic reflectors formed without discrete permanent layering. Rather, such parabolic reflectors or similarly, vehicles, may be formed by homogeneous construction where discrete layering is absent, and where energy reflectivity or scattering characteristics are embedded within the homogeneous mixture of carbon nanotubes and associated graphite powders and epoxy, resins and hardeners. The mixture of carbon graphite nanofiber and carbon nanotubes generates higher electrode conductivity and magnetized attraction through molecular polarization. In effect, the rigid members may be tuned based on the application. The combination of these materials creates a unique matrix that is then set in a memory form at a specific temperature, and then applied to various materials through a series of multiple layers, resulting in unparalleled strength and durability.

Antenna elements are disclosed herein that include a metallic square ring patch and a metallic square ring slot to transmit or receive radio frequency (RF) signals. The disclosed antenna elements use several dielectric layers that are separated by two low-dielectric foam layers. The square ring patch is located above an upper foam layer, and a square ring slot is located between the upper foam layer and a bottom foam layer. Electrical feed lines are used to either supply electrical power to the antenna elements cells or output RF signals that are received by the square ring patch. The disclosed antenna elements may be arranged together in an antenna array that is tunable to collectively generate or receive RF signals.

A printed antenna may include a loop antenna body, a feed port, and a switch component. The loop antenna body includes a first end and a second end, there is a spacing between the first end and the second end, a connection line between the first end and the second end forms a closed loop with the loop antenna body. The feed module is configured to output a feed signal to the loop antenna body by using the feed port. The loop antenna body includes a plurality of loop antenna branches, the switch component is disposed between every two adjacent loop antenna branches, and the switch component is configured to connect or disconnect the two adjacent loop antenna branches.

According to various embodiments of the present invention, an antenna device can comprise: a substrate layer; a source antenna arranged on the substrate layer so as to include a radiating conductor for radiating electromagnetic waves in the direction in which one surface of the substrate layer is oriented; and a planar lens for converting quasi-spherical electromagnetic waves radiated from the source antenna into plane waves. The antenna device can be varied according to embodiments.

According to various embodiments of the present invention, an antenna device can comprise: a substrate layer; a source antenna arranged on the substrate layer so as to include a radiating conductor for radiating electromagnetic waves in the direction in which one surface of the substrate layer is oriented; and a planar lens for converting quasi-spherical electromagnetic waves radiated from the source antenna into plane waves. The antenna device can be varied according to embodiments.

An impedance matching film 10a has a plurality of openings 11. The plurality of openings 11 are formed at equal intervals in a specific direction along main surfaces 10f of the impedance matching film 10a. The impedance matching film 10a has a sheet resistance of 300 to 700Ω/□. A size G of each opening 11 in the specific direction is 50 μm or more and 1000 μm or less. In the impedance matching film 10a, a cross-sectional resistance value R.sub.s is 1MΩ/m or more. The cross-sectional resistance value R.sub.s is determined by dividing a specific resistance of a material forming the impedance matching film 10a by a product of a thickness of the impedance matching film 10a and a distance between the nearest openings 11.