Abstract: A dove tail device for adjusting tilting angle of an antenna by rotating an arm member using a motion member which moves linearly is disclosed. The dove tail device in an antenna includes a guide and a motion member configured to move on the guide. Here, the motion member is combined with a rotation arm of a phase shifter, the rotation arm rotates according as the motion member moves on the guide, and an arm member of the phase shifter rotates in response to rotation of the rotation arm.

Abstract: An antenna having a transformer exchangeable in accordance with tilting angle adjustment rate is disclosed. The antenna includes a phase shifter, a tilting adjustment apparatus and a transformer configured to move linearly in response to a force provided from the tilting adjustment apparatus, and deliver a force corresponding to the moving to the phase shifter.

Abstract: A frequency tunable filter comprises a housing having a plurality of walls therein defining a plurality of cavities; a cover mounted on the housing; a plurality of resonators contained in the cavities; at least one sliding member located between the cover and the resonators; and a plurality of metal tuning elements attached to a lower part of the sliding member, wherein frequency tuning is performed by sliding of the sliding member.

Abstract: A method of coating an RF device for reducing cost of manufacture and coating period of time and a sputtering apparatus used in the same are disclosed. The sputtering apparatus used for coating of an RF device includes a supporting member on which an object to be coated corresponding to the RF device is placed, a first target made up of material coated on the object and a second target disposed separately from the first target. Here, power is applied to the first target and the second target when the object is coated.

Abstract: A frequency tunable filter is disclosed. The frequency tunable filter includes a filter unit that can tune a frequency band of a frequency signal being filtered, a communication module that receives a control signal for controlling the tuning of the frequency band, and a control unit that controls the tuning of the frequency band based on the control signals. The disclosed filter can control the tuning of the filter's frequency band wirelessly.

Abstract: A communication device for a vehicle in which an RF device in the room mirror is connected electrically to a radiator included in a shade band is disclosed. The communication device for a vehicle includes an RF de vice in a room mirror and a radiator disposed in a shade band and connected electrically to the RF device.

Abstract: A feeding system for providing a power using metal patterns having ‘U’ shape is disclosed. A phase shifter as the feeding system includes a first substrate, a first pattern as a conductor disposed on the first substrate, a second substrate separated from the first substrate and a second pattern as a conductor disposed on the second substrate. Here, the first pattern is overlapped with the second pattern, and electrical length of overlapped part of the patterns changes in case of changing phase of an RF signal outputted from the phase shifter.

Abstract: An RF cavity filter is disclosed. The disclosed filter includes: a housing having at least one cavity defined; a cover coupled to an upper portion of the housing; at least one resonator contained within the at least one cavity; at least one hole formed in the cover; at least one grounding bolt configured to be inserted into the hole, having a screw thread formed on a part of an outer perimeter, and having a center hole in a center portion; and at least one tuning bolt inserted into the housing through the center hole along a screw thread formed on an inner perimeter of the center hole, where the grounding bolt has a flange part formed on a lower portion that is in contact with the tuning bolt and a lower portion of the cover.

Abstract: An antenna for a mobile terminal for improving SAR and HAC characteristics is disclosed. The disclosed antenna may include: a first conductive line electrically connected to a feeding point; a second conductive line separated from the first conductive line at a designated distance and electrically connected to a ground; a third conductive line extending from the second conductive line; and a coupling branch separated from the third conductive line and electrically connected to a ground, where coupling matching and coupling feeding occur between the first conductive line and the second conductive line, and the second conductive line and the third conductive line operate as a radiator. The disclosed antenna can enable impedance matching for a broader band and can improve SAR and HAC characteristics.

Abstract: A broadband antenna is disclosed. The disclosed antenna may include: a substrate; an impedance matching/feeding unit, arranged on the substrate and comprising a first matching member and a second matching member configured to perform impedance matching through a coupling method; a radiating member electrically connected to the impedance matching/feeding unit; and a signal line electrically connected to the second matching member. Here, the signal line is implemented in the form of an electrical loop.

Abstract: A radiator for improving beam pointing error and beam tracking error using a dielectric member and an antenna including the same are disclosed. The radiator includes a first dipole member, a second dipole member adjacent to the first dipole member, a third dipole member facing to the first dipole member, and a fourth dipole member facing to the second dipole member. Here, the first to fourth dipole members have square shape, and a dielectric member is connected to at least one of the first to fourth dipole members.

Abstract: A patch antenna is disclosed. The disclosed patch antenna may include: a first radiator configured to generate a circular polarized wave; a first dielectric substrate equipped under the first radiator; a second radiator, placed under the first radiator at a designated distance from the first radiator, and configured to generate a linear polarized wave; a second dielectric substrate equipped under the second radiator; and a reflecting plate equipped under the second radiator at a designated distance from the second radiator; where the first dielectric substrate, the second radiator, the second dielectric substrate, and the reflecting plate are connected through at least one via. A patch antenna according to the present invention has the advantages of being able to generate linear polarized waves and circular polarized waves simultaneously, and of having a small size while still having a high design frequency band.

Abstract: An antenna for realizing broadband and/or multi-band using branch members is disclosed. The antenna includes a reflection plate and a radiation device disposed on the reflection plate. Here, the radiation device includes a first feeding point and a first dipole member electrically connected to the first feeding point. At least one first branch member is formed to one side of the first dipole member, and one or more second branch member is formed to another side of the first dipole member.

Abstract: An antenna, where an end point of a radiator is shorted, using coupling matching is disclosed. The antenna includes a first conductive element connected electrically to a first ground, a second conductive element connected electrically to a feeding part, and spaced from the first conductive element by a certain distance, a third conductive element extending from the first conductive element and configured to output a RF signal, an end point of the third conductive element being coupled to a second ground. Here, the first conductive element and the second conductive element have a certain length so that a travelling wave is generated and enough coupling is provided. The antenna provides wide band characteristics while maintaining a low profile structure. The frequency characteristics of the antenna are not changed significantly due to external factors such as hand effect and head effect.

Abstract: A wide-band antenna using coupling matching is disclosed. The antenna may include a first conductive element, which is electrically connected with a ground; a second conductive element, which is electrically connected with a power feed point and formed parallel to the first conductive element with a particular distance in-between; and a third conductive element for emitting an RF signal that extends from the first conductive element, where the first conductive element and the second conductive element have a particular length such that progressive waves are generated and sufficient coupling is achieved. According to certain aspects of the present invention, a internal type multi-band antenna having wide-band characteristics can be provided, by using coupling matching for multi-band design.

Abstract: An antenna for a vehicle for enabling to design freely and enhance characteristics of the antenna such as isolation, etc. is disclosed. The antenna includes a substrate and a case configured to cover the substrate. Here, one or more radiator is disposed on an outer surface of the case, and a power is fed to the radiator from the substrate.

Abstract: Disclosed is an internal antenna providing impedance matching for a wide band where a feeding patch is placed on a substrate. The disclosed antenna may include: a substrate; an impedance matching/feeding unit including a feeding patch, which is formed on the substrate and electrically connected to a feeding point, and a ground patch, which is electrically connected to a ground and formed above the feeding patch separated at a designated distance from the feeding patch; and a radiator formed extending from the ground patch, where the impedance matching/feeding unit performs impedance matching by way of coupling between the feeding patch and the ground patch, and the radiator receives coupling feeding from the feeding patch. The disclosed antenna has the advantages of overcoming the narrow band problem of a planar inverted-F antenna, and of allowing more efficient utilization of space in an internal antenna for a wide band using coupling matching and coupling feeding.

Abstract: An internal antenna providing impedance matching for a wide band is disclosed. The disclosed antenna may include: a substrate; an impedance matching/feeding unit comprising a feeding member, separated from the substrate at a designated distance, configured to receive RF signals, and of a designated length in a first direction, and a ground member, separated from the substrate at a designated distance, separated from the feeding member at a designated in a second direction perpendicular to the first direction, and of a designated length in the first direction; and a radiator extending from the ground member; wherein the impedance matching/feeding unit performs impedance matching by way of coupling between the feeding member and the ground member, and the radiator receives coupling feeding from the feeding member. The disclosed antenna has the advantages of overcoming the narrow band problem of a planar inverted-F antenna, and of allowing more efficient utilization of space in an internal antenna.

Abstract: A DC blocking device of a small size is disclosed. The disclosed DC blocking device may include: an internal conductor where RF signals are inputted; and an external conductor electrically connected to a ground; wherein the internal conductor has an insertion groove, and an insertion conductor is inserted into the insertion groove without touching the internal conductor and at a designated distance, and the diameter of the external conductor in the portion where the insertion conductor is inserted is set to be different from the diameter of another portion. The disclosed DC blocking device has the advantages of minimizing the spatial constraint when the DC blocking device is mounted on a mobile communication device, and of achieving suitable coupling even if the length of the part where coupling is achieved is reduced in the DC blocking device.

Abstract: A multi band internal antenna is disclosed. The antenna may include a board, an impedance matching/feeding part formed on the board, and a first radiation element joined to the impedance matching/feeding part, where the impedance matching/feeding part may include: a first matching element of a particular length that is coupled to a ground, and a second matching element of a particular length that is arranged with a distance from the first matching element and is electrically coupled to a feeding point, and where the distance between the first matching element and the second matching element may vary partially. Thus, a multi band internal antenna can be provided that utilizes coupling matching to achieve wide-band characteristics even for multi-band designs.