Full-band multichannel big-power general transmitter implementation device and method

Abstract

The invention discloses a full-band multichannel big-power general transmitter implementation device and method, and the device comprises a multipath selectable small-power radio frequency signal synthesis module which is used for receiving multiple signal sources from a plurality of excitation modules, synthesizing the signal sources, and outputting a small-power radio frequency signal; a multipath small-signal in-phase distribution module which is used for receiving the small-power radio frequency signal, transmitting the small-power radio frequency signal, and generating N output signals so that a big-power power amplifier module group uses the N output signals; the big-power power amplifier module group which comprises N big-power power amplifier modules, wherein each big-power power amplifier module receives one of the N output signals, carries out three-level amplification and generating a high-power radio frequency signal; and a big-power bread antenna module group which comprises N big-power bread antenna modules corresponding to the N big-power power amplifier modules in a one-to-one manner, and is used for receiving big-power radio frequency signals and transmitting the coverage. The device reduces the equipment investment, enlarges the signal coverage area, and improves the operation stability of equipment.

Description

technical field [0001] The invention relates to a TV band signal transmitter, in particular to a method and device for realizing a multi-channel high-power universal transmitter with a TV full frequency band of 470MHz-792MHz. Background technique [0002] Existing common TV band transmitters (such as figure 1 As shown), taking the analog as an example, a single unit can only transmit an 8MHz analog channel, the power is mostly 5KW, the maximum does not exceed 10KW, and the high power needs to use the IOT amplifier tube to reach 30KW, but the IOT amplifier tube transmitter as a whole The volume is large, the working voltage is super high, and the water cooling system is complex. If the traditional transmitter wants to realize multi-channel shared antenna and feeder transmission, it needs to add a multiplexer, but the multiplexer itself is a high-power combiner, which is strictly limited by the frequency band and power. [0003] In addition, the final stage amplification of ...

AI Technical Summary

Problems solved by technology

[0002] Existing common TV band transmitters (such as figure 1 As shown), taking the analog as an example, a single unit can only transmit an 8MHz analog channel, the power is mostly 5KW, the maximum does not exceed 10KW, and the high power needs to use the IOT amplifier tube to reach 30KW, but the IOT amplifier tube transmitter as a whole Larger volume, ultra-high working voltage, complex water cooling system

If the traditional transmitter wants to realize multi-channel shared antenna and feeder transmission, it is necessary to add a multiplexer, but the multiplexer itself is a high-power synthesizer, which is strictly limited by the frequency band and power

[0003] In addition, the final stage amplification of the transmitter itself is not only limited by power and bandwidth, but also the failure of a single power amplifier unit will lead to unbalanced power synthesis and large local heating. Severe unbalance may cause ignition of the absorbing load, and the machine will automatically reduce power or off the air

Therefore, due to many constraints in the final high-power synthesis of the transmitter itself and multiplexer synthesis, a traditional transmitter, taking 16 power amplifier units as an example, can only sit at a maximum bandwidth of 20MHz, that is, a transmitter The machine can only be solidified into 3 adjacent frequency points at most, and the multiplexer added for multi-channel transmission is expensive and takes up space in the machine room, which brings many constraints to the TV program coverage of radio and television

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