Abstract:
Provided is a phase shifter for shifting a phase of a signal the phase shifter including an input unit to split an input signal into a plurality of signals having different phases, a connection unit to change at least one of magnitudes and phases of the plurality of signals, apply the changed plurality of signals to a plurality of loads, and receive a plurality of return signals generated when the applied signals are returned by the plurality of loads, and an output unit to generate an output signal having a predetermined phase difference from the input signal based on the return signals.
Abstract:
A master reference oscillator system is provided. The master reference oscillator system includes a plurality of reference oscillators and a hybrid matrix receiving signals from the plurality of reference oscillators and outputting a plurality of output signals having the same signal magnitude, wherein at least two output signals among the plurality of output signals may have a phase difference.
Abstract:
Provided is a microwave switch including at least one semiconductor device connected to a transmission line and grounded in parallel, and at least one inductor connected in series to the transmission line. When the semiconductor device is shorted, the inductor may perform impedance matching through an interaction with the semiconductor device.
Abstract:
Disclosed is a wide band sum & difference circuit for a monolithic microwave integrated circuit according to an exemplary embodiment of the present invention. The wide band sum & difference circuit for a monolithic microwave integrated circuit according to an exemplary embodiment of the present invention, including: a Range coupler having one terminal connected to a plurality of first ports that receive a signal and the other terminal connected to a plurality of second ports that output signals; one λ/4 line that is connected between one output terminal and one second port of the Range coupler in series; and one short stub λ/4 line that is connected with the other output terminal and the other second port of the Range coupler in parallel.
Abstract:
A high gain patch antenna and a method of manufacturing the same are provided. The antenna includes a substrate with a flat structure including a dielectric, a cross-shaped conductor arranged at a center of an upper part of the substrate, and radiator units arranged in each of four areas divided by the cross-shaped conductor on the upper part of the substrate, wherein each of the radiator units may be arranged to have a 90-degree difference from an adjacent radiator unit with respect to a center of the substrate.
Abstract:
Disclosed is a radio frequency low-loss power divider/combiner and power amplifier including the same, the power divider/combiner including a waveguide and a converter configured to convert an input signal received from an input signal terminal into a plurality of output signals and output the plurality of output signals to a plurality of output signal terminals corresponding to the plurality of output signals through the waveguide, wherein the waveguide includes the converter.
Abstract:
Provided is an active true time delay apparatus for delaying a time and producing a gain in a superhigh frequency band using a field effect transistor (FET) and a similar semiconductor device. The active true time delay apparatus may include a delayer configured to delay an input signal for a predetermined length of time using at least one FET element connected in a distributed amplifier structure and an outputter configured to output the delayed input signal, and the delayer is disposed on a transmission line between an inputter and the outputter.
Abstract:
A monolithic microwave integrated circuit (MIMIC) for a phased array antenna system, and a phased array antenna system including the MIMIC are provided. The MIMIC includes a first amplifier including a first input terminal and a first output terminal, a second amplifier including a second input terminal and a second output terminal, a first switch connectable to the first input terminal and the second output terminal, and a second switch connectable to the first output terminal and the second input terminal.
Abstract:
The present invention provides a multi-port amplifier which adopts a pair of SP4T switches and a pair of hybrid couplers in order to flexibly adjust an amplification mode. By using the proposed invention, the limited system flexibility and reconfigurability due to fixed input and output relations are overcome regardless of a component failure in a system. Moreover, signal amplification based on effective signal distribution and combination can be consistently performed according to various port configurations by different switching modes. Thus, the overall practicality of outputs comparing to the conventional multi-port amplifier can be effectively increased within an available lifespan of the system.
Abstract:
Disclosed is a low phase shift voltage variable attenuator. The low phase shift voltage variable attenuator may include: a first directional coupler including a first input terminal in which a signal is input, a first isolation terminal connected to a ground power source through a termination resistor, a first coupling terminal, and a first through terminal; a second directional coupler including a second input terminal through which an attenuated signal, which is the attenuated input input signal, is output, a second isolation terminal connected to a ground power source through a termination resistor, a second coupling terminal, and a second through terminal; and a signal attenuating unit connected to the first coupling terminal, the first through terminal, the second coupling terminal, and the second through terminal, and configured to attenuate a signal transmitted through the first directional coupler to transmit the attenuated signal to the second directional coupler.