Co-site coupling interference tracking and cancelling device
A technology of coupling interference and cancellation device, applied in antenna coupling and other directions, can solve the problems of reducing the coupling interference level and coupling interference blocking of co-located transceiver antennas, and achieve the effect of reducing coupling interference level and improving electromagnetic compatibility.
Inactive Publication Date: 2011-02-16
CHINA SHIP DEV & DESIGN CENT
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is: to provide a co-site coupling interference canceling device, which can greatly reduce the coupling interference level between the co-site transceiver antennas, and solve the problem that the receiving station is generated by the transmitting antenna when the transmitting and receiving stations are working at the same time. Coupling Interference Blocking Problem
Method used
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[0031] figure 1 It is a structural block diagram of an embodiment of the present invention, which is composed of a directional coupler, an electrical tuning trap and a phase-locked loop circuit; the input end of the directional coupler is connected to the receiving antenna, and the output end of the directional coupler is connected to the electrical tuning trap The input end of the wave filter is connected, the coupling end of the directional coupler is connected with the input end of the phase-locked loop circuit; connected to the output.
[0032] Described phase-locked loop circuit is made up of phase detector, low-pass filter and voltage-controlled oscillator; The input end of low-pass filter is connected with the output end of phase detector, and the output end of low-pass filter is connected with voltage-controlled oscillator The input end of the voltage-controlled oscillator is connected with the input end of the phase detector; wherein the input end of the phase detect...
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The invention provides a co-site coupling interference tracking and cancelling device which is characterized by being composed of a directional coupler, an electrically tunable wave trap and a phase locked loop, wherein the input end of the directional coupler is connected with a receiving antenna, the output end of the directional coupler is connected with the input end of the electrically tunable wave trap, the coupling end of the directional coupler is connected with the input end of the phase locked loop, the output end of the electrically tunable wave trap is connected with a receiver, and the control end of the electrically tunable wave trap is connected with the output end of the phase locked loop. Under the condition of not reducing the low-frequency resource utilization ratio, the co-site coupling interference tracking and cancelling device can greatly reduce the coupling interference level between co-site receiving and dispatching antennae and improve the electromagnetic compatibility of the co-site receiving and dispatching antennae.
Description
technical field [0001] The invention belongs to electromagnetic interference control devices, in particular to a co-site coupling interference tracking and canceling device. Background technique [0002] Coupling interference between co-located transceiver antennas is one of the common forms of electromagnetic interference. Since the transmitting and receiving antennas are arranged on the same site, the distance between them is small and the isolation is low. The transmitting power of the transmitting antenna is usually high, tens of watts, hundreds of watts or even thousands of watts, which will generate a large coupling voltage at the nearby receiving antenna, which will form a strong interference power, which will seriously affect the reception The machine works normally, causing the receiver to be blocked or even burned. [0003] The interference source of co-site coupling interference is the transmitting antenna of the transmitting station, and the resulting coupling ...
Claims
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IPC IPC(8): H01Q1/52
Inventor 谭辉方重华张崎邢芳易学勤奚秀娟
Owner CHINA SHIP DEV & DESIGN CENT