6results about How to "Reduce noise figure" patented technology

The invention discloses a differential derivative structure circuit based on three-coupling transformation and an amplifier, and relates to the technical field of amplification circuit design. The differential derivative structure circuit comprises a three-coupling inductance network and N output parts. Through a three-coupling transformation mode, power supply of a main amplifier tube and an auxiliary amplifier tube in a differential derivative structure formed by connecting MOS tubes in parallel is integrated into an inductance matching network, so that homologous coupling of the main amplifier tube and the auxiliary amplifier tube on a radio frequency signal path is realized, physical isolation and independent bias control are also realized on a direct current path, and the power supply efficiency is improved. Therefore, a resistor does not need to be used, excessive use of a capacitor is avoided, loss caused by self impedance of the capacitor and ground parasitic capacitance loss are reduced, gain is greatly improved, extra area occupation caused by the capacitor and the resistor is effectively inhibited, and thermal noise introduced by the resistor is eliminated by utilizing the characteristic of low impedance of inductive coupling. Therefore, post-stage noise is effectively suppressed, and the noise coefficient is reduced.

The application discloses an ultra-wideband GaAs amplitude-phase control transceiver front-end chip, which is applied to the field of phased array radars, and aims at the fact that high-low pass type phase shifters adopted in existing transceiver front-end chips are only applicable to low-frequency phase shift units, and are limited by the problem of filter order; the application proposes a novel phase shift structure based on a magnetic coupling all-pass network and an active complementary dual-mode amplification circuit, the structure can realize a great expansion of available frequency on the premise of ensuring phase shift precision, and a 180-degree phase shift network based on an active structure can effectively provide transmission gain, reduce the number of used link amplifiers, further reduce the noise coefficient of a receiving link and assist in improving the power characteristics of a transmitting link. The application of the technology helps to realize good phase shift precision, input and output return loss and lower phase shift error of the chip in an ultra-wideband range of 2-18GHz.

The embodiment of the invention provides an ultra-low noise tile-type phased array plane based on a silicon-based chip, and the phased array plane comprises an antenna part PCB, and the antenna part PCB comprises an array antenna, an LNA chip, a board-level filter, a BFIC chip based on a silicon-based technology, and a power division network which are connected in sequence; wherein the array antenna is provided with a patch antenna, and a feed point of the patch antenna is directly connected with the LNA chip through a plated-through hole; the LNA chip is connected with the board-level filter through a plated-through hole, the board-level filter is connected with the BFIC chip through a plated-through hole, and the BFIC chip is connected with the power division network through a plated-through hole; the LNA chip is integrated with a dynamic tuning matching circuit, and dynamic impedance matching can be carried out according to the working condition of the patch antenna. Therefore, the tile-type phased array plane provided by the embodiment of the invention realizes the consideration of high integration level, low noise, low loss, dynamic matching and interference resistance, and overcomes the defects of the traditional tile-type phased array plane in the aspects of integration level, noise, loss, matching flexibility, filtering and the like.

The invention provides a front low-noise light amplification method and system for a coherent detection laser radar, and the system comprises a continuous laser receiving and transmitting module which is used for transmitting detection light and receiving an echo signal, and the echo signal serves as first signal light; the double-pump generation module is used for generating second signal light and idler frequency light having a relative phase relation with the second signal light, and the second signal light and the idler frequency light serve as first pump light and second pump light respectively; the phase sensitive light amplification module is used for performing phase sensitive light parametric amplification after the first signal light is combined with the first pump light and the second pump light; the phase locking module is used for locking the relative phase between the double-pump light and the first signal light in the phase sensitive light amplification module; and the coherent detection module is used for detecting the first signal light amplified by the phase-sensitive optical parameter and demodulating information in the target. Weak optical signals can be amplified in a high-gain mode, amplification of same-frequency background noise can be restrained, and the signal-to-noise ratio and coherent detection efficiency of echo signals can be improved.

The application provides a modular radio frequency receiving front end with fast power-on capability. The modular radio frequency receiving front end comprises a filtering limiting front end, a switch filtering amplification circuit, a power division circuit, a large dynamic SDLVA circuit and an SDLVA power supply circuit, and is connected with each functional module through an SMP joint to realize modular design, detects the performance of each circuit through multi-stage self-checking, increases the isolation degree between the SDLVA chip and the rear-stage operational amplifier circuit through an operational amplifier, and provides the power supply voltage of the ns level rising edge for the SDLVA detection module, so as to reduce the complexity of the radio frequency signal interconnection and the power supply control wiring of the multi-channel receiving front end, and has the characteristics of modular design, high sensitivity, high reliability, strong universality and the like.

This invention provides a low-noise amplifier and electronic device for a phased array system, relating to the field of antenna technology. The input common-gate transistor is connected to the output common-gate transistor via an inductor-coupled transformer. The inductor-coupled transformer increases the transconductance of both the input and output common-gate transistors by utilizing the mutual coupling of its multiple inductors and adjusting the coupling coefficients between pairs of inductors. As the radio frequency signal is amplified by the input and output common-gate transistors with increased transconductance, noise is reduced, and the signal is then output to the subsequent circuitry by the output common-gate transistor. This invention achieves increased transconductance of the dual transistors, reduced noise figure, increased circuit gain, excellent circuit performance, and simplified input and noise matching. It also improves system integration, reduces chip area and power consumption, and indirectly reduces the cost of radio frequency millimeter-wave phased array systems.