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Low noise frequency converter

A noise and device technology, applied in the direction of multi-frequency modulation and transformation, can solve problems such as the influence of inverter reliability, and achieve the effect of weakening or eliminating vibration, reducing noise, and improving stability

Inactive Publication Date: 2014-12-24
MIANYANG LEIDICHUANG MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the reliability of the existing frequency converter is also affected by the temperature. How to ensure that the temperature of the frequency converter will not be too high, reduce the noise, and prevent the damage to the mechanical parts of the vibration is particularly important.

Method used

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  • Low noise frequency converter

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Embodiment 1

[0018] Such as figure 1 As shown, the low-noise frequency converter device of the present invention includes a passive filter, a pre-amplifier, a pre-mixer, an active filter, a secondary amplifier, a mixer, a final amplifier and an AC reactor connected in sequence , the pre-mixer is also connected to a four-stage amplifier and a radiator at the same time, and a frequency synthesizer is also connected to the four-stage amplifier, and the frequency synthesizer is also connected to a power divider; the radiator is also connected to the mixer and a three-stage amplifier, the three-stage amplifier is also connected with the phase locker, the phase locker is also connected with the power divider, and the power divider is also connected with a local oscillator source that provides a 10MHz signal.

[0019] A passive filter is set at the front end of the device to filter out high-order harmonics and avoid the influence of high-order harmonics on input signals. After passing through th...

Embodiment 2

[0022] The preferred specific structure of this embodiment is as follows on the basis of the above embodiments: the frequency synthesizer is also connected to a humidity sensor. Respond to the humidity on the frequency synthesizer in time, and then take moisture-proof measures to prevent the device from being affected by moisture, thereby further improving its working stability.

[0023] The passive filter is an LC type passive filter. Install an LC type passive filter in front of the frequency converter with low noise to filter out high-order harmonics, suppress interference sources, and avoid higher harmonics from increasing the leakage current of the output cable of the frequency converter and causing insufficient output of the motor. , improve the reliability of the device.

[0024] The passive filter is also connected to the input signal.

[0025] The AC reactor is also connected to the output signal.

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Abstract

The invention discloses a low noise frequency converter. The low noise frequency converter comprises, a passive filter, a prime amplifier, a prime mixer, an active filter, a second-level amplifier, a mixer, a final amplifier and an alternating current reactor which are sequentially connected, the prime mixer is connected with a fourth-level amplifier and a radiator, a frequency synthesizer is further connected to the fourth-level amplifier, and the frequency synthesizer is also connected with a power divider; the mixer is also connected with the radiator and a third-level amplifier, the third-level amplifier is also connected with a lock-in amplifier, the lock-in amplifier is also connected with the power divider, and the power divider is connected with a local oscillator providing 10 MHz signals. By means of the above principles, the low noise frequency converter can reduce noise, avoid damage of other mechanical components caused by vibration and reduce temperature to avoid overhigh temperature of the device and further enables the electronic element to work more stably.

Description

technical field [0001] The invention relates to the field of frequency converters, in particular to frequency converters with low noise. Background technique [0002] In recent years, with the rapid development of microwave devices, in the field of radar and communication, low-noise amplifiers are generally used as the front stage in the receiving system, which greatly reduces the system noise figure and improves the sensitivity. The influence and effect of the mixer on the receiving system is not the case. For the SSB system, especially the SSB system with low intermediate frequency, the radial noise will have a great impact on the noise. Therefore, in the single-sideband system with a wide frequency band of the low-noise amplifier and a low intermediate frequency, a mixer is still required, and the mixer also includes a frequency converter with low noise. We know that when the low-order harmonic components in the output of the frequency converter resonate with the natura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03D7/16
Inventor 梁波
Owner MIANYANG LEIDICHUANG MICROELECTRONICS
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