Pre-frequency-division superheterodyne broadband receiver and use method thereof

Abstract

The invention relates to a pre-frequency-division superheterodyne broadband receiver and a use method thereof, and the receiver comprises a frequency division assembly, and the output end of the frequency division assembly is sequentially connected with a filtering assembly, a first amplifier, a programmable attenuator, a first frequency mixer, a second amplifier, a first filter, a second frequency mixer, a third amplifier and a second filter in series. The output end of the second filter is used for outputting signals; the first mixer is further connected with the first integrated phase-locked loop, and the second mixer is further connected with the second integrated phase-locked loop. Pre-frequency division is carried out through the frequency division assembly, and pre-selected segmented filtering is carried out through the filtering assembly; a pre-frequency-division scheme is adopted, high-frequency-band radio-frequency input signals are subjected to frequency division in advance, the high-frequency-band radio-frequency input signals and low-frequency-band radio-frequency input signals multiplex a preselection filter (a filtering assembly), the difficulty of a receiver is effectively reduced, and the superheterodyne receiver has the advantages of being low in cost, simple in structure, wide in receiving frequency band and high in anti-interference capacity, and the working frequency band of the superheterodyne receiver can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of 20MHz-8000MHz radio frequency broadband reception, and in particular relates to a pre-divided superheterodyne broadband receiver and a use method thereof. Background technique [0002] In current superheterodyne receivers, as involved in CN107888215A, CN111030725A, CN203368451U, etc., superheterodyne technology is adopted, the operating frequency range is narrow, the structure is complex, the preselection filter circuit is huge, and the local oscillator frequency is high, mainly there are the following deficiencies : [0003] (1) The pre-selection filter technology is adopted, the pre-selection filter has many segments and the circuit scale is large. [0004] (2) At present, the local oscillator frequency of the superheterodyne receiver is high, and the research and development is difficult. [0005] (3) When the superheterodyne receiver has relatively high requirements on the operating frequency band, ...

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Problems solved by technology

[0004] (2) At present, the local oscillator frequency of the superheterodyne receiver is high, and the research and development is difficult

[0005] (3) When the superheterodyne receiver has relatively high operating frequency requirements, the R&D and manufacturing costs are high

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