A HF, VHF and UHF signal scanning and detecting system based on a DDS
A signal and radio frequency technology, applied in transmission systems, transmission monitoring, electrical components, etc., can solve problems such as high prices and unsuitable shielding products
Pending Publication Date: 2018-01-12
深圳市唐诚兴业科技有限公司
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[0002] At present, the mainstream of HF VHF and UHF frequency band signal detection machines in the market is mostly imported professional grade, which can not only search signal frequency but also demodulate modulated signals, such as FM\FSK and other signals, but the price is expensive, so it is not suitable for application in jammer products
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[0014] In order to make the object, technical solution and advantages of the present invention clearer, the present invention is described below through specific embodiments shown in the accompanying drawings. It should be understood, however, that these descriptions are exemplary only and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
[0015] Such as figure 1 As shown, the specific implementation mode adopts the following technical solutions: it includes numerical control filter 1, low noise amplifier one 2, low noise amplifier two 3, radio frequency mourning device 4, low noise amplifier three 5, low pass filter 6, mixing Frequency converter 7, operational amplifier one 8, digital frequency sweep source 9, crystal filter 10, operational amplifier two 11, operational amplifier three 12, mea...
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The invention discloses a HF, VHF and UHF signal scanning and detecting system based on a DDS, and relates to the technical field of wireless signal detection. A low-noise amplifier amplifies a weak signal output by a frequency selection network; a radio frequency attenuator sets a MCU to send commands to control the attenuation value according to a program, and the signal undergoes primary low-noise amplification and goes through a low-pass filter to be sent to a mixer for mixing; a digital sweep frequency source performs frequency scanning according to a program predetermined by the MCU, andthen the signal source is output to the mixer; the mixer performs down-mixing of a radio frequency reception signal and a DDS scanning signal; after mixing, the signal is subjected to primary amplification and sent to a 45MHz or 112MHz quartz crystal filter; and the signal selected by the quartz crystal filter is subjected to two-stage amplification and then sent to an average detector for detection. The system of the invention has the advantages of low cost, strong practicability and simple use, meets the requirements of the civil electronic countermeasure market and realizes the signal detection technology in the product of the interference detection system.
Description
technical field [0001] The invention relates to a DDS technology-based HF VHF and UHF frequency band signal scanning detection system, which belongs to the technical field of wireless signal detection. Background technique [0002] At present, the mainstream of HF VHF and UHF frequency band signal detection machines in the market is mostly imported professional grade, which can not only search signal frequency but also demodulate modulated signals, such as FM\FSK and other signals, but the price is expensive, so it is not suitable for application in jammer products . Contents of the invention [0003] In view of the above problems, the technical problem to be solved by the present invention is to provide a DDS technology-based HF VHF and UHF frequency band signal scanning detection system. [0004] The HF VHF and UHF frequency band signal scanning detection system based on DDS of the present invention, it comprises numerical control filter, low noise amplifier one, low no...
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Login to View More IPC IPC(8): H04B17/318H04B17/345H04B1/00
CPCY02D30/70
Inventor 吴麓峰蒋俊荣
Owner 深圳市唐诚兴业科技有限公司