Abstract: A high speed flip-flop circuit and a configuration method thereof are provided. A small number of transistors may be used to configure a flip-flop circuit, so that the flip-flop circuit may be operated at a high-speed. Additionally, an area occupied by the flip-flop circuit may be reduced, and power consumption may be reduced. Accordingly, the flip-flop circuit may be integrated together with a microwave frequency integrated circuit using a Gallium Arsenide (GaAs) compound semiconductor process.

Abstract: A deployable reflectarray antenna includes a plurality of reflectarray antenna panels each having one edge connected to be folded and unfolded. Each reflectarray antenna panel includes a membrane having reflecting elements and a support frame. The support frame includes outer frames surrounding edges of the membrane, and a plurality of reinforcing members disposed in a vertical direction between the outer frames in a length direction.

Abstract: A multi-function MMIC operated by a switch using an amplifier is disclosed. A switch may be configured by connecting an input or an output of a plurality of amplifiers, and an insertion loss may be reduced by selecting a transmission mode or a reception mode of an MMIC using the switch. A noise characteristic, a power characteristic, and a gain characteristic may also be improved.

Abstract: Provided is an SPDT switch having improved isolation characteristics in an RF band. The SPDT switch includes a serial switching unit, a current sink unit, a switching isolation unit, and a DC blocking unit. The serial switching unit includes first and second HBTs. The current sink unit sinks a current flowing from a common input terminal to each of first and second output terminals of the serial switching unit. The switching isolation unit causes an unselected output terminal of the first and second output terminals to be electrically isolated from the common input terminal when the serial switching unit operates. The DC blocking unit blocks a DC between the first HBT and the first output terminal and a DC between the second HBT and the second output terminal. Accordingly, it is possible to provide better insertion-loss and isolation characteristics in higher frequency bands than typical switches.

Abstract: A butler matrix and a multi-port amplifier having the same, capable of splitting a single input signal into N-signals or combining N-signals into a single output are provided. The hybrids are provided in a predetermined disposition, the input port and the output port of the hybrids are provided in a predetermined direction and the waveguides are provided in a bended structure such that paths for connecting the hybrids have no crossing portion.

Abstract: A frequency mixing apparatus includes a local oscillator, a signal distributor, a first frequency mixer and a second frequency mixer and a combiner. The signal distributor divides a signal generated from the local oscillator into two signals having a phase difference and outputs the two signals. The first frequency mixer has a first input port through which one of the two signals outputted through the signal distributor is inputted and a second input port connected to an RF signal. The a second frequency mixer has a first input port through which one of the two signals outputted through the signal distributor and a second input port is connected to a termination signal. The combiner combines signals respectively outputted from the first and second frequency mixers.

Abstract: A 7 pole resonator filter including a dual mode resonator and a triple mode resonator may include a first dual mode resonator including independent adjusting portions adjusting each frequency according to two resonant modes, and having at least one conductive surface, a triple mode resonator including independent adjusting portions adjusting each frequency according to three resonant modes separate from the two resonant modes, and having at least one conductive surface, a first connecting portion electrically connecting the first dual mode and the triple mode resonators, a second dual mode resonator including independent adjusting portions adjusting each frequency according to two resonant modes separate from the two resonant modes and the three resonant modes, and having at least one conductive surface, and a second connecting portion electrically connecting the triple mode resonator and the second dual mode resonator. The three dual mode resonators have similar shapes.

Abstract: A cable network antenna and a manufacturing method thereof are provided. The cable network antenna maintains correct positions of nodes at which a plurality of cables intersect, using a circumferential truss that minimizes transformation of a reflecting surface. Accordingly, accuracy of the reflection surface is achieved.

Abstract: A high speed flip-flop circuit and a configuration method thereof are provided. A small number of transistors may be used to configure a flip-flop circuit, so that the flip-flop circuit may be operated at a high-speed. Additionally, an area occupied by the flip-flop circuit may be reduced, and power consumption may be reduced. Accordingly, the flip-flop circuit may be integrated together with a microwave frequency integrated circuit using a Gallium Arsenide (GaAs) compound semiconductor process.

Abstract: An apparatus for adjusting the length of a tension tie mounted on a deployable antenna based on a cable network structure includes a cable retainer provided with a retaining hole, a cable being connected to the cable retainer; a retaining case coupled to the outer periphery of the cable retainer and provided with a plurality of retaining holes; and a retainer positioned inside the cable retainer and configured to extend through the retaining hole of the cable retainer and through one of the retaining holes of the retaining case so that the cable retainer and the retaining case are prevented from moving in the longitudinal direction.

Abstract: This research discloses an ultra wideband system-on-package (SoP). The SoP includes a package body; a first integrated circuit mounted on the package body; a first signal transmission unit connected to the first integrated circuit; a signal via connected to the first signal transmission unit and including a slab line and a trough line; and a second signal transmission unit connected to the signal via. The technology of the present research can transmit ultra broadband signals by minimizing discontinuity of signals appearing during vertical transition that occurs in the course of a signal transmission to/from an external circuit, and a fabrication method thereof.

Abstract: A multi-function MMIC operated by a switch using an amplifier is disclosed. A switch may be configured by connecting an input or an output of a plurality of amplifiers, and an insertion loss may be reduced by selecting a transmission mode or a reception mode of an MMIC using the switch. A noise characteristic, a power characteristic, and a gain characteristic may also be improved.

Abstract: Provided is a 3-way balun for a double balanced mixer. This research provides a 3-way balun available for a planar-type double balanced mixer and a planar-type double balanced mixer employing the same. The 3-way balun includes a first output unit for receiving and outputting an input signal of a predetermined frequency; and second and third output units connected to the first output unit and outputting signals whose phase is different by 180 from a phase of a signal of the first output unit and amplitude is a half of an amplitude of the signal outputted from the first output unit.

Abstract: Provided is a phase shifter having a high phase difference in a microwave band. The phase shifter includes a first phase shifting unit configured to receive an input signal having a predetermined frequency, receive a first control signal and a second control signal operating contrary to the first control signal, output the input signal as it is when the first control signal is activated, and output the input signal to have a lead phase as much as a predetermined phase, and a second phase shifting unit configured to receive a second signal outputted from the first phase shifting unit, receive the first control signal and the second control signal, output the second signal to have a lagged phase as much as a predetermined phase when the first control signal is activated, and output the second signal as it is when the second control signal is activated.

Abstract: Provided is a line filter. The line filter includes a plurality of dielectric layers stacked one another, a plurality of line resonator each comprising transmission lines on at least two of the dielectric layers, and a tuning unit adjusting a binding amount and resonance frequency of the line resonators. Since the line filter includes at least one line resonator on at least two stacked dielectric layers, the integration can be easily realized. Further, since the line filter can be adjusted even after the line filter is manufacture, the line filter has an excellent frequency property. Since the line filter is realized on the plurality of the dielectric layers, the frequency band can be widened.

Abstract: Provided is a CMOS switch for use in RF switching having improved isolation properties. The CMOS switch includes a serial switching unit having first and second CMOS switches, a switching isolation unit for allowing an unselected output terminal of two output terminals to be electrically isolated from a common input terminal when the serial switching unit operates and an isolation enhancement unit. The isolation enhancement unit is connected in parallel to the first and the second CMOS switches between the two output terminals forming a parallel resonance circuit together with a parasitic capacitor of the serial switching unit. The CMOS switch for use in RF switching according to the present invention has a simple circuit structure and excellent operating properties at the MF or higher band. Also, the CMOS switch having high isolation properties is realized.

Abstract: Provided is an SPDT switch having improved isolation characteristics in an RF band. The SPDT switch includes a serial switching unit, a current sink unit, a switching isolation unit, and a DC blocking unit. The serial switching unit includes first and second HBTs. The current sink unit sinks a current flowing from a common input terminal to each of first and second output terminals of the serial switching unit. The switching isolation unit causes an unselected output terminal of the first and second output terminals to be electrically isolated from the common input terminal when the serial switching unit operates. The DC blocking unit blocks a DC between the first HBT and the first output terminal and a DC between the second HBT and the second output terminal. Accordingly, it is possible to provide better insertion-loss and isolation characteristics in higher frequency bands than typical switches.

Abstract: A system for controlling temperature of an antenna module including a heat generating module, and a radome and an underbody cover that enclose the heat generating module. The system includes: a heat collecting unit mounted on inner surface of the antenna module; a heat discharging unit mounted on outer surface of the antenna module; and a heat transfer unit for transferring heat from the heat collecting unit to the heat discharging unit.

Abstract: Provided is a marchand balun device. The marchand balun device includes: a first line connected between a balanced terminal and a ground terminal; a second line disposed horizontally parallel to the first line and forming a parallel capacitance jointly with the first line; and a coupled line disposed vertically parallel to the first and second lines and forming a vertical capacitance jointly with one of the first and second lines.

Abstract: An apparatus for adjusting the length of a tension tie mounted on a deployable antenna based on a cable network structure includes a cable retainer provided with a retaining hole, a cable being connected to the cable retainer; a retaining case coupled to the outer periphery of the cable retainer and provided with a plurality of retaining holes; and a retainer positioned inside the cable retainer and configured to extend through the retaining hole of the cable retainer and through one of the retaining holes of the retaining case so that the cable retainer and the retaining case are prevented from moving in the longitudinal direction.