Abstract: A monopole antenna having a matching function includes a ground; and a radiator having a first radiation part which is connected to a first side of the ground in a strip shape perpendicularly to the ground, and at least one second radiation part which is bent from a first end of the first radiation part at least once.

Abstract: A multiple-input multiple-output (MIMO) antenna and an antenna system using the same are provided. The MIMO antenna includes a plurality of antenna elements in which a feeding unit is formed at one end, and another end is connected to a ground, and a connection unit which connects the antenna elements.

Abstract: A multiband antenna with removed coupling includes a radiator formed as a meander line bent zigzag several times and having a gap filling part in at least one area between neighboring meander lines. The gap filling part interconnects the neighboring meander lines. The multiband antenna further includes a ground connected with the radiator and at least one switch element mounted in an area along the longitudinal direction of the radiator and configured to alternately short or open an area of the radiator. Accordingly, two different resonance frequencies can be tuned using the single antenna, and the antenna efficiency can be enhanced by removing the coupling between the resonant frequencies that are tuned through the gap filling.

Abstract: An antenna having a parasitic element is disclosed, the antenna including a ground, a radiation unit which is arranged on a different area of the same plane as the ground, and a parasitic element which is selectively connected to the ground, and operates as an antenna element. Where the antenna is in a first mode, electromagnetic waves resonate in the radiation unit, and where the antenna is in a second mode, electromagnetic waves resonate in the radiation unit and the parasitic element.

Abstract: A Multiple Input Multiple Output (MIMO) antenna system adaptable to an environmental multiplicity is provided. A MIMO antenna system includes a first antenna element, a second antenna element, a receiver for receiving at least one of different polarized signals through the first antenna element, a channel estimator for estimating a channel using a signal received via the receiver and a signal received via the second antenna element, and a correlation comparator for controlling the receiver to receive a specific polarized signal according to a correlation calculated from the estimated channel.

Abstract: Disclosed is a mobile terminal with plural antennas. The mobile terminal with plural antennas, comprising a circuit board formed with a variety of elements, at least one first antenna formed on one surface of the circuit board to transmit and receive a radio signal for mobile communications, and at least one second antenna formed on the other surface of the circuit board to transmit and receive a radio signal for additional services. Accordingly, as the size of the mobile terminal does not necessarily increase to have plural antennas, the mobile terminal can be miniaturized.

Abstract: A mobile terminal and a mobile terminal antenna reduce the intensity of electromagnetic waves radiated in the direction of a human body. The mobile terminal antenna includes a radiator, which radiates electromagnetic waves; a ground which is connected with the radiator, and a radiation preventer which has a metallic bar on one side of the ground in parallel with the ground at an interval. Accordingly, the electromagnetic radiation exposure to the human body can be reduced by altering the radiation emission pattern, while the performance of the antenna can be simultaneously enhanced.

Abstract: A monopole antenna capable of implementing an MIMO system, which includes a ground part formed of plate metal, a monopole antenna element connected to one side of the ground part and formed of strips bent multiple times, an auxiliary antenna element connected to one side of the ground part and disposed adjacent to the monopole antenna element to electrically connect to the monopole antenna element, and a short-circuit part interconnecting the monopole antenna element and the auxiliary antenna element. Accordingly, the monopole antenna element is bent multiple times so that the antenna can become compact in less than half a width compared to the conventional antenna, and when the MIMO system is constructed, the interference between the respective antennas can be reduced so that the array antenna can become compact in size.

Abstract: A multiple-input multiple-output (MIMO) antenna operable in a multiband includes a plurality of antenna elements each including a radiator radiating electromagnetic waves, a ground connected to the radiator, at least one switching element mounted in an area of lengthwise direction of the radiator and short-circuiting or opening the area of the radiator.

Abstract: An antenna having an additional ground, includes a first ground which is formed in one side of a substrate; a plurality of antenna elements which are formed symmetrically with respect to each other and spaced apart from one end of the first ground; and a second ground which is interposed between the plurality of the antenna elements and integrally formed with the first ground. Accordingly, the deterioration of the antenna characteristics can be minimized even after the arrangement of the antenna elements with the ground, and the antenna can be miniaturized and easily fabricated in a two-dimensional structure. Furthermore, the electromagnetic wave interference can be minimized between the antenna elements.

Abstract: A method of capturing a still image during reproduction of a moving picture is provided. The method includes reproducing the moving picture at a slow speed when a first input signal is received during reproduction of the moving picture; and capturing a still image from the moving picture, which is being reproduced at the slow speed, when a second input signal is received.

Abstract: Disclosed is an antenna capable of micro-tuning and macro-tuning for a wireless terminal, comprising: a radiator radiating electromagnetic waves; a ground connected to the radiator; at least one switching element positioned at a lengthwise region of the radiator, for shorting or opening the region of the radiator; and a voltage controlling element positioned at the radiator between the switching element and the ground, for controlling the extent of a voltage potential applied across the radiator. In accordance with the present invention, the antenna is capable of the macro-tuning between the service bands and micro-tuning for channel control within the service bands. Furthermore, the size of the antenna is significantly reduced and the antenna is installed on a circuit board in a patch type, thereby simplifying a work process.

Abstract: An active antenna capable of transmitting and receiving a wireless signal of a low frequency band and a mobile communication terminal having the active antenna, are provided. The active antenna includes an antenna element which transmits and receives a wireless signal, a filter which filters the wireless signal being received at the antenna element such that a wireless signal belonging to a frequency band lower than the operating frequency of the antenna element is passed, and an amplifier which amplifies the wireless signal being passed through the filter. As a result, the size of the antenna can be greatly reduced, by the use of an active antenna which receives wireless signals of low frequency bands. Additionally, a more compact mobile communication terminal can be provided, because wireless signal of both high frequency bands and low frequency bands can be transmitted and received at one antenna.

Abstract: A flat-plate MIMO array antenna includes a substrate, a plurality of antenna elements disposed on the substrate, and at least one isolation element interposed between a plurality of antenna elements on the substrate and connected to a ground. Mutual interference between the antenna elements is prevented by the isolation element formed between the antenna elements, thereby preventing the distortion of the radiation pattern. Also, since the isolation element is grounded to the ground surface, the isolation element operates as a parasitic antenna, thereby increasing the output gain.

Abstract: An ultra wide band (UWB) device and a detect and avoid (DAA) method thereof are provided. The UWB device includes a detect and avoid (DAA) module block which detects a strength of radio signals received in a plurality of channels and determines communicability of the channels; a multitone generation block which generates a plurality of frequencies corresponding to the plurality of the channels and outputs one of the plurality of frequencies; and a controller which controls the multitone generation block to generate frequencies of an available channel which is determined to be communicable by the DAA module block. The method includes detecting a strength of radio signals received in a plurality of channels; determining communicability of the channels according to the detected strength of the radio signals; generating frequencies corresponding to a channel which is determined to be communicable; and transmitting or receiving a signal using the generated frequencies.

Abstract: A monopole antenna having a matching function includes a ground; and a radiator having a first radiation part which is connected to a first side of the ground in a strip shape perpendicularly to the ground, and at least one second radiation part which is bent from a first end of the first radiation part at least once.

Abstract: A multiple-input multiple-output (MIMO) antenna operable in a multiband includes a plurality of antenna elements each including a radiator radiating electromagnetic waves, a ground connected to the radiator, at least one switching element mounted in an area of lengthwise direction of the radiator and short-circuiting or opening the area of the radiator.

Abstract: A multiband antenna with removed coupling includes a radiator formed as a meander line bent zigzag several times and having a gap filling part in at least one area between neighboring meander lines. The gap filling part interconnects the neighboring meander lines. The multiband antenna further includes a ground connected with the radiator and at least one switch element mounted in an area along the longitudinal direction of the radiator and configured to alternately short or open an area of the radiator. Accordingly, two different resonance frequencies can be tuned using the single antenna, and the antenna efficiency can be enhanced by removing the coupling between the resonant frequencies that are tuned through the gap filling.

Abstract: A mobile terminal and a mobile terminal antenna reduce the intensity of electromagnetic waves radiated in the direction of a human body. The mobile terminal antenna includes a radiator, which radiates electromagnetic waves; a ground which is connected with the radiator, and a radiation preventer which has a metallic bar on one side of the ground in parallel with the ground at an interval. Accordingly, the electromagnetic radiation exposure to the human body can be reduced by altering the radiation emission pattern, while the performance of the antenna can be simultaneously enhanced.

Abstract: Disclosed is an antenna capable of micro-tuning and macro-tuning for a wireless terminal, comprising: a radiator radiating electromagnetic waves; a ground connected to the radiator; at least one switching element positioned at a lengthwise region of the radiator, for shorting or opening the region of the radiator; and a voltage controlling element positioned at the radiator between the switching element and the ground, for controlling the extent of a voltage potential applied across the radiator. In accordance with the present invention, the antenna is capable of the macro-tuning between the service bands and micro-tuning for channel control within the service bands. Furthermore, the size of the antenna is significantly reduced and the antenna is installed on a circuit board in a patch type, thereby simplifying a work process.