6results about "Modulation transference by diodes" patented technology

A frequency mixer arrangement (300, 400, 500, 600) for receiving a first input signal (LOin) and a second input signal (IFin; RFin), for mixing the first and the second input signals to provide a frequency mixed signal (RFout; IFout), and for providing the frequency mixed signal as an output signal. The frequency mixer arrangement (300, 400, 500, 600) comprises: a first transistor (210), wherein the first transistor (210) is configured to receive the first and the second input signals at a control terminal (211) of the first transistor (210) and to mix the first and the second input signals to provide the frequency mixed signal from a current-sourcing terminal (213) of the first transistor (210), and wherein the first transistor (210) is configured to receive a first bias voltage (Vb1) at the control terminal (211) of the first transistor (210) and to receive a first supply voltage (Vcc1) at a current-collecting terminal (212) of the first transistor (210); and a diode (250), wherein an anode (251) of the diode (250) is galvanically connected to the current-sourcing terminal (213) of the first transistor (210) and a cathode (252) of the diode (250) is galvanically connected to ground, wherein the frequency mixer arrangement (300, 400, 500, 600) further comprises an inductive component (380) connected in series between the anode (251) of the diode (250) and the current-sourcing terminal (213) of the first transistor (210).

The invention discloses a radio frequency mixer integrated with an adaptive adjustment function, which belongs to the technical field of electronic circuits and comprises a waveguide main body, an integrated mixer component, an embedded parasitic compensation network and an adaptive control unit. The inner wall of the waveguide main body is provided with an annular groove, and the cylindrical shielding case is embedded in the groove to enable the inner surface of the cylindrical shielding case to be coplanar with the inner wall of the waveguide, thereby eliminating the projection problem of a conventional shielding case. The mixing diode is accurately installed on the microstrip substrate at the bottom of the groove, and the distance between the two components is set to be odd times of the half-wavelength of a local oscillator signal. And the embedded parasitic compensation network adopts a three-dimensional spiral capacitor structure and is connected with the mixing diode through a micro grounding through hole. The adaptive control unit monitors performance indexes in real time through a sensor, and dynamically adjusts the position of the movable short-circuit end and the bias voltage of the diode by using a gradient algorithm. According to the invention, the problem of high-band phase mismatch is solved, and the conversion efficiency, isolation and linearity are significantly improved.

The application discloses a radio frequency mixer integrated with self-adaptive adjusting function and belongs to the technical field of electronic circuits, comprising: the mixer comprises a waveguide main body, an integrated mixer assembly, an embedded parasitic compensation network and a self-adaptive control unit. The inner wall of the waveguide main body is provided with an annular groove, and a cylindrical shielding cover is embedded in the groove so that the inner surface of the shielding cover is coplanar with the inner wall of the waveguide, and the protrusion problem of the traditional shielding cover is eliminated. The mixing diode is accurately installed on the microstrip substrate at the bottom of the groove, and the distance between the two components is set to the odd multiple of the half wavelength of the local oscillator signal. The embedded parasitic compensation network adopts a three-dimensional spiral capacitor structure and is connected with the mixing diode through a micro ground via. The self-adaptive control unit monitors the performance index in real time through a sensor and dynamically adjusts the position of the movable short-circuit end and the diode bias by using a gradient algorithm. The application solves the problem of phase mismatch in the high-frequency band and significantly improves the conversion efficiency, isolation and linearity.

The invention relates to the technical field of carrier modulation, and discloses an adjustable carrier mixing modulation method and system, and the method comprises the steps: obtaining a first change rate of a target modulation wave under a first working condition, and carrying out the first division operation of the first change rate; obtaining a first change rate of the target modulation wave under the real-time working condition, and determining a first target carrier frequency according to the first division operation result; and presetting a first constraint, and carrying out carrier frequency mixing modulation based on the first constraint in combination with the first target carrier frequency. According to the invention, the dynamic adjustment of the carrier frequency can be realized, and the optimal carrier frequency is determined according to the change rate of the modulated wave, so that unnecessary switching operation is reduced, switching loss is reduced, and the overall efficiency of the system is improved. Meanwhile, through preset constraint conditions, the system can also ensure the quality of the output waveform, the harmonic content of the three-phase voltage and the three-phase current is controlled within a target range, and the actual application requirement is met.

The objective is to provide an orthogonal mixer that has the function to perform distortion compensation independently on each of its two unit mixers. [Solution] A quadrature mixer comprising first and second unit mixers that use the mth order (m is a natural number) of the LO wave as a carrier wave, having an LO distribution unit that equally distributes the LO wave and outputs it to the first and second unit mixers with a phase difference of π / 2m, having a power combining unit that combines the output wave from the first unit mixer and the output wave from the second unit mixer, having a first compensation signal generation unit that generates a compensation signal to be input to the first unit mixer based on the quadrature transmission signal or its information, and a second compensation signal generation unit that generates a compensation signal to be input to the second unit mixer.

Devices and methods for a detection system and heterodyne mixer having a local oscillator (LO) input, a radio frequency (RF) input, an intermediate frequency (IF) output, and a suspended waveguide structure that has a quartz substrate and patterned metal transmission line with a plurality of suppression slots.