Multichannel FM (Frequency Modulation) radio-frequency mixed active output circuit
A technology of radio frequency mixing and output circuit, applied in the application field, can solve the problems of huge and bloated system, and achieve the effect of reducing material requirements, good economic benefits, and good power supply
Active Publication Date: 2016-01-20
SUZHOU HUAQI INTELLIGENT TECH
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Problems solved by technology
[0002] The existing FM radio frequency signal transmission is generally a single frequency point transmission, which requires more cables and equipment, and only transmits the radio frequency signal itself, and it does not yet have the ability to provide power on the same signal line while transmitting the signal To supply the next level of equipment to work, the next level of equipment must also add power equipment, resulting in a large and bloated system, so the present invention mainly solves these problems and overcomes the current transmission method
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[0030] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0031] like figure 1 and figure 2 As shown, it is a structural block diagram of the multi-channel signal mixing channel and the multi-channel signal coupling channel in the present invention. In this embodiment, the five-channel radio frequency signals RF_TX_PA_IN1 to RF_TX_PA_IN5 are taken as an example to illustrate the technical solution of the present invention. elaborate.
[0032] 1. DC / DC part of the power conversion module
[0033] Power supply DC 24V power supply BAT24V0 through the input interface module CON, such as Figure 12 As shown, this embodiment adopts the J40 interface terminal and introduces it into the device, such as Figure 10As shown, after filtering by C266 of the power conversion module DC / DC, the quality of the power supply is corrected to achieve a good and relatively pure power supply of 24V power sup...
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The invention discloses a multichannel FM (Frequency Modulation) radio-frequency mixed active output circuit, which comprises a multichannel signal mixing path or a multichannel signal coupling path and up to five ways of FM radio-frequency signals are input, wherein after the signals are mixed, the signals are overlapped to a DC power supply to form an active carrier FM signal, and the active signal is transmitted by a coaxial cable with the specification of 50 Ohm, so that the signal and the power supply are supplied to an FM signal receiving device at an equipment side, the mixed output of the five ways of FM radio-frequency signals is completed in a limited space, and the active radio-frequency signal carrier output is formed, and thus the material cost for layout of signal lines and the like can be reduced, and the supply cost for the power supply of equipment at a receiving end can be saved.
Description
technical field [0001] The invention relates to the application technical fields of radio frequency signal transmission and radio frequency signal mixed active transmission used in rail transit such as high-speed rail and subway, and specifically relates to a multi-channel FM radio frequency mixed active output circuit. Background technique [0002] The existing FM radio frequency signal transmission is generally a single frequency point transmission, which requires more cables and equipment, and only transmits the radio frequency signal itself, and it does not yet have the ability to provide power on the same signal line while transmitting the signal To supply the next level of equipment to work, the next level of equipment must also add power equipment, resulting in a large and bloated system, so the present invention mainly solves these problems and overcomes the current transmission method. The present invention is used on track traffic such as high-speed train EMUs, and...
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IPC IPC(8): H04B1/40
Inventor 钟华刘晓华贾永利彭海辉葛文献
Owner SUZHOU HUAQI INTELLIGENT TECH