Dual-band multi-channel radio frequency interference cancellation device
A technology of radio frequency interference and cancellation device, applied in transmission systems, electrical components, etc., can solve the problem of not considering the broadband operating frequency band of the cancellation device
Active Publication Date: 2021-05-07
NAVAL UNIV OF ENG PLA
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Problems solved by technology
None of the above-mentioned patents considers how to implement radio frequency interference cancellation under the condition that the cancellation device is aimed at the broadband working frequency band, especially when it is difficult for radio frequency devices (such as quadrature power splitters, couplers, etc.) to cover the working frequency band
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Embodiment Construction
[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.
[0041] The transmitting station that realizes the dual-band communication of the first frequency band and the second frequency band has two working modes. The first one is to use one transmitting station to cover the entire frequency band at the same time, and the second is to use two radio stations to work in the first frequency band and the second frequency band respectively. Second band. According to the actual working mode of the station. The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments 1 and 2 respectively.
[0042] figure 1 It is a structural block diagram of Embodiment 1 of the present invention: including an interference sampling unit 1...
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The invention provides a dual-band multi-channel radio frequency interference cancellation device, which includes an interference sampling unit, an interference cancellation unit and a monitoring unit. The radio frequency input of the interference sampling unit is the transmission signal of the first frequency band transmitter and the second frequency band transmitter, its control input end is connected with the sampling control end of the monitoring unit, its straight-through output end is respectively connected with each transmission load, and its first A frequency band coupling output end and a second frequency band coupling output end are respectively connected to the first frequency band coupling input end and the second frequency band coupling input end of the interference cancellation unit; the first frequency band reference input end of the interference cancellation unit is connected to the interference sampling The first frequency band coupling output end of the unit is connected to the second frequency band reference input end of the unit is connected to the second frequency band coupling output end of the interference sampling unit, and the receiving end is connected to the receiving antenna. The invention eliminates the blocking interference, receiver intermodulation interference and adjacent channel noise interference among multiple wide-band transceiving radio stations with different ports.
Description
technical field [0001] The invention belongs to the technical field of circuit design and equipment level electromagnetic compatibility, and in particular relates to a dual-band multi-channel radio frequency interference cancellation device. Background technique [0002] Radio stations are an important means of communication between mobile carriers, with portable, vehicle-mounted, airborne and ship-borne forms. Mobile carriers are usually equipped with multiple radio stations. Limited by the limited space of the mobile carrier, when multiple radio stations work at the same time, co-site radiation interference will occur. The traditional electromagnetic interference control strategy is a passive interference suppression method, which mainly avoids electromagnetic interference through transmission channel suppression, space separation, frequency division, and time separation. Correspondingly, at present, the main method to solve the interference problem between radio station...
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IPC IPC(8): H04B1/10H04B1/12H04B1/18H04B1/00
CPCH04B1/006H04B1/10H04B1/1036H04B1/1081H04B1/126H04B1/18
Inventor 孟进何方敏李毅葛松虎王青邢金岭
Owner NAVAL UNIV OF ENG PLA