Coupling device

Abstract

The invention provides a coupling device. The coupling device comprises a coupler and a filter circuit; the coupler is provided with a microstrip line structure; the coupler comprises an input end, a through output end, a separating end and a coupling output end; the filter circuit is connected in series between the through output end and the separating end of the coupler, so that the current inflowing from the input end of the coupler can pass through the through output end, then is transmitted to the separating end by the filter circuit, and is finally output by the coupling output end. According to the coupling device, the filter circuit is added between the through output end and the separating end, so that low-frequency current can pass through the coupling device; the output of the through output end and the output of the coupling output end respectively provide power to remote end nodes, and no influence is brought to the coupling of radio frequency signals between parallel coupling seams, so that the functions of transmitting the current by the coupling device can be achieved, and the amount of the joints of the coupling device and external devices is unchanged, and as a result, the stability of the system can be improved.

Description

technical field [0001] The invention relates to the co-cable transmission technology, in particular to a coupling device. Background technique [0002] Co-cable transmission technology is a radio frequency broadband technology. It transmits the video, audio or data baseband signals that need to be transmitted on the high-frequency carrier. After reaching the destination, the baseband signal is separated from the carrier. Since the frequency bandwidth of the RF coaxial cable can reach more than 0-3GHz, while the frequency of direct current is 0Hz and the frequency of alternating current is 50Hz, both direct current and alternating current can also be transmitted through the coaxial cable. For example, at the input end, a power supply can be used The interposer (or remote power supply unit) completes the mixing of power supply and high-frequency carrier, provides a high-frequency channel and isolates the signal channel of high-frequency and power supply. After the signal reac...

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the above-mentioned prior art, the inventor found that there are at least the following technical problems in the prior art: the newly added device not only needs to be re-laid, which increases the difficulty of transformation, but also increases the number of joints between the coupler and the externally added device and potential failure points, thereby reducing system stability and increasing system transformation costs

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