Maritime ultra-short wave beyond visual range communication device
A communication device and beyond-the-line-of-sight technology, which is applied to electrical components, transmission systems, etc., can solve problems such as large attenuation loss in refraction transmission, inability to achieve beyond-line-of-sight transmission, and affect the quality of beyond-line-of-sight communication, achieving a large dynamic range, Improve the out-of-band rejection rate and the effect of adjacent channel rejection
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[0026] Such as figure 1 As shown, the ultrashort wave over-the-horizon communication device is composed of an antenna, an electronic switch 4 , a radio frequency receiving unit 1 , a radio frequency transmitting unit 2 , and a baseband unit 3 .
[0027] The radio frequency signal received by the antenna is sent to the radio frequency receiving unit 1, and the radio frequency signal from the radio frequency transmitting unit 2 is transmitted by the antenna.
[0028] The electronic switch 4 is used to switch whether the antenna is transmitting or receiving. In the receiving state, the antenna receives radio frequency signals, and in the transmitting state, the antenna transmits radio frequency signals.
[0029] The radio frequency receiving unit 1 is composed of a radio frequency front-end module 101, a frequency conversion module 102, an intermediate frequency amplification module 103, and an intermediate frequency processing module 104;
[0030] The RF front-end module 101 i...
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