Patent application number | Description | Published |
20110140964 | RF VECTOR MODULATOR FOR BEAMFORMING - A beamforming RF vector modulator is provided. The beamforming RF vector modulator includes a first amplification part for amplifying an input single RF signal and outputting differential RF signals of different phases; an RF signal converter for receiving the differential RF signals and outputting four differential signals I+, I−, Q+, and Q− of different phases, the RF signal converter comprising a polyphase filter which is virtually opened by resonance of an output terminal comprising a transmission line load; a Variable Gain Amplifier (VGA) part comprising a I VGA which varies an amplitude and a polarity of the differential signals I+ and I−, and a Q VGA which varies the amplitude and the polarity of the differential signals Q+ and Q−according to a control signal; and an RF signal synthesizer for synthesizing an output current of the I VGA and an output current of the Q VGA. By use of the plurality of the RF vector modulators, the beamforming can be easily achieved with low power in the next-generation 60 Gbps-level WPAN. | 06-16-2011 |
20120162009 | BEAMFORMING ARRAY ANTENNA CONTROL SYSTEM AND METHOD FOR BEAMFORMING USING THE SAME - A control system connected to a plurality of array antenna performs beamforming. In order to perform the beamforming, the control system receives response beams inputting to a first antenna group predetermined from a plurality of array antenna in response to radiate beams and decides a sector having comparatively stronger intensity. And the control system receives response beams inputting to a second antenna group, decides a plurality of beam levels and decides a final beam pair among the plurality of the decided beam levels. | 06-28-2012 |
20120163493 | ULTRAHIGH FREQUENCY I/Q SENDER/RECEIVER USING MULTI-STAGE HARMONIC MIXER - A receiver using a harmonic mixer includes a signal receiver for receiving a first signal, a frequency generator for synchronizing a phase of the received first signal, down-converting a frequency size of the synchronized first signal as much as a first size, and outputting the down-converted signal as a second signal; a first harmonic mixer unit for receiving the first signal and the second signal, generating a third signal having a frequency size down-converted as much as a second size, and outputting the third signal. The receiver further includes a second harmonic mixer unit for receiving the third signal and outputting an In-phase signal having a frequency size down-converted as much as a third size, and a third harmonic mixer unit for receiving the third signal and outputting a Quadrature-phase signal having a frequency size down-converted as much as a third size. | 06-28-2012 |
20130147539 | DOWN-CONVERTER, UP-CONVERTER, RECEIVER AND TRANSMITTER APPLYING THE SAME - A down-frequency conversion circuit and up-frequency conversion circuit, and a receiver and transmitter applying the same are provided. The down-frequency conversion circuit includes a harmonic mixer and general mixer, and thus becomes able to convert frequency using one LO (Local Oscillator) frequency, thereby reducing burden on generating LO frequency. | 06-13-2013 |
20130154760 | BONDING WIRE IMPEDANCE MATCHING CIRCUIT - An impedance matching circuit is provided. The present impedance matching circuit is able to match impedance using a transformer which is arranged inside a dielectric substrate and arranged to overlap with a bonding pad area and an end of a transmission line, thereby enabling transmitting signals at a desired frequency with a minimum insertion loss without using a very thin transmission line which is several to dozens of μm wide or specially designed antennas in order to compensate for inductance. Thus, the present impedance matching circuit may be applied to various millimeter bands. | 06-20-2013 |
20140139298 | RF SWITCH WITH TRANSFORMER AND SWITCHING METHOD THEREOF - A radio frequency (RF) switch with a transformer and a switching method thereof are provided. The RF switch includes a transmitting end transformer having a primary side connected to a transmitting end and a secondary side connected to an antenna; and a receiving end transformer having a primary side connected to the antenna and a secondary side connected to a receiving end. In a transmission mode, the transmitting end transformer is tuned on, and, in a reception mode, the receiving end transformer is turned on. Accordingly, since switching is performed based on transformers rather than transistors connected in series, the RS switch, which can achieve high linearity and low insertion loss as well as high isolation, can be implemented. | 05-22-2014 |
20140312933 | LOW NOISE COMPARATOR FOR HIGH RESOLUTION ADC - A low noise comparator for a high resolution ADC is provided. The comparator includes: an inputter configured to receive a signal and amplify the signal; and an outputter configured to output a result of comparing the signal output from the inputter, wherein an inductor is connected to an input terminal of an input element of at least one of the inputter and the outputter. Accordingly, the comparator can satisfy the gain value and the noise performance at the same time by using the inductor which has no voltage headroom problem. | 10-23-2014 |
20150229034 | BEAMFORMING ARRAY ANTENNA CONTROL SYSTEM AND METHOD FOR BEAMFORMING USING THE SAME - A control system connected to a plurality of array antenna performs beamforming. The control system requests a first antenna group predetermined from a plurality of array antenna to radiate beams to a plurality of predetermined sectors. The control system receives response beams inputting to the first antenna group in response to the radiated beams, decides a sector having comparatively stronger intensity among response beams for a plurality of sectors as an optimized sector, and requests a second antenna group to radiate beams to a plurality of sectors included in the optimized sector. The control system receives response beams inputting to the second antenna group, decides a sector related to a beam having comparatively stronger intensity among response beams for the plurality of sectors in the optimized sector, decides a plurality of beam levels, and decides a final beam pair among the plurality of the decided beam levels. | 08-13-2015 |