Patent application number | Description | Published |
20090093211 | DEVICE FOR PREVENTING EAVESDROPPING THROUGH SPEAKER - Provided is a device for preventing eavesdropping through a speaker. More particularly, a device for preventing eavesdropping by transmitting a jamming signal through a speaker common signal line is provided, the device including: a jamming signal generator for generating a jamming signal comprising a noise signal; an amplifier for amplifying the jamming signal; and a transformer for receiving the amplified jamming signal from the amplifier and outputting the amplified jamming signal to a speaker common signal line. The device may transmit a jamming signal in an audible frequency band to the speaker common signal line, thereby rendering conversations unrecognizable to eavesdroppers when an electrical signal induced from a speaker is detected through the speaker common signal line. | 04-09-2009 |
20110227777 | TWO-DIMENSIONAL ARRAY ANTENNA AND DEVICE FOR DETECTING INTERNAL OBJECT USING THE SAME - Provided are a two-dimensional array antenna and a device for detecting an internal object using the same. The device includes a plurality of unit antennas in a two-dimensional array of m columns and n rows on a board (where m and n are integers greater than 1), a first switch selecting one or more transmitting antenna to radiate a pulse signal onto an internal object in a structure from among the unit antennas; a second switch selecting one or more receiving antenna to collect a signal reflected from the internal object from among the unit antennas, and a transceiving analysis module analyzing information about the position and shape of the internal object. | 09-22-2011 |
20130106640 | GPS SIGNAL RECEPTION APPARATUS AND METHOD | 05-02-2013 |
20130175082 | VENT STRUCTURE FOR ELECTROMAGNETIC SHIELDING - A vent structure for electromagnetic shielding includes: a conductive shielding case having a vent formed therein: a conductive shielding duct installed on the shielding case so as to cover the vent, including a space formed perpendicular to the direction of motion of air discharged from the vent to vent the air and a discharge port connected from the space to the outside to discharge the air introduced into the space to the outside, and shielding electromagnetic waves; and an EMI (Electro Magnetic Interference) gasket installed at a bonding surface between the shielding case and the shielding duct, and electrically connecting the shielding case and the shielding duct. | 07-11-2013 |
20140139394 | ULTRA-WIDEBAND ANTENNA HAVING FREQUENCY BAND NOTCH FUNCTION - An ultra-wideband (UWB) antenna having a frequency band notch function is provided. The UWB antenna includes a substrate, a radiation part, a feeding part, and a slot. The radiation part is formed on one surface of the substrate, and radiates radio signals. The feeding part is formed on the other surface of the substrate, and feeds electric signals to the radiation part. The slot is formed in a stub formed at one end of the feeding part, and rejects frequencies in a notch band in the radio signals that are radiated by the radiation part. | 05-22-2014 |
20140375500 | ANTI-JAMMING APPARATUS AND METHOD FOR COMPACT ARRAY ANTENNA - An anti-jamming apparatus and method for a compact array antenna are provided. The anti-jamming apparatus for a compact array antenna includes a Global Navigation Satellite System (GNSS) array antenna unit including a plurality of GNSS antennas for receiving GNSS signals transmitted from a satellite. A first beam-forming unit includes a plurality of combination units for receiving respective signals received by the plurality of GNSS antennas as a first reference signal and first auxiliary signals and combining the first reference signal with the first auxiliary signals, thus forming different beams. A second beam-forming unit receives signals of the different beams, and combining the signals of the different beams, thus forming an anti-jamming beam in which an invisible area is minimized. | 12-25-2014 |
20150130678 | MULTI-BAND GNSS FIXED RECEPTION PATTERN ANTENNA APPARATUS - The present invention relates to a multi-band Global Navigation Satellite System (GNSS) fixed reception pattern antenna apparatus, which can mitigate interference signals using spatial filtering by optimizing the radiation pattern of an antenna. The multi-band GNSS fixed reception pattern antenna apparatus includes a broadband antenna radiator for receiving at least two types of GNSS signals, and a plurality of partition walls for enclosing the antenna radiator around the antenna radiator. Heights and intervals of each of the plurality of partition walls are independent of frequencies of signals desired to be blocked. | 05-14-2015 |