A multi-channel fm radio frequency hybrid 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 power supply, and good economic benefits
Active Publication Date: 2018-02-27
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] Such as 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 10 As 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 s...
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The present invention is a multi-channel FM radio frequency hybrid active output circuit, which includes a multi-channel signal mixing channel or a multi-channel signal coupling channel. Up to five FM radio frequency signals are input, and after signal mixing, they are superimposed on a DC power supply to form Active carrier FM signal, and transmit the active signal through a 50-ohm coaxial cable, so as to supply the signal and power of the FM signal receiving device at the equipment end, and complete the mixed output of 5 channels of FM radio frequency signals in a limited space, forming an effective Source radio frequency signal carrier output, reducing material costs such as laying signal lines, and saving power supply costs for receiving end equipment.
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