Decoupling method and decoupling network of MIMO antenna of mobile communication system terminal
A mobile communication system and antenna technology, applied in the field of decoupling networks, can solve the problems of being easily affected by the external environment, the difference in antenna efficiency, and the narrow working bandwidth, achieving strong portability and compatibility, simple configuration, and improved isolation. Effect
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[0021] Example 1
[0022] The decoupling method of the MIMO antenna of the mobile communication system terminal, by inserting an additional coupling resonant cavity between the antenna ports, introducing a constant amplitude and antiphase current and the coupling current to cancel each other, thereby improving the isolation of the dual antenna system and improving the antenna The radiation efficiency greatly reduces the spatial correlation of the antenna and realizes decoupling. The coupled resonant cavity uses a tunable low-pass filter to achieve decoupling.
Example Embodiment
[0023] Example 2
[0024] The decoupling method of the MIMO antenna of the mobile communication system terminal, by inserting an additional coupling resonant cavity between the antenna ports, introducing a constant amplitude and antiphase current and the coupling current to cancel each other, thereby improving the isolation of the dual antenna system and improving the antenna The radiation efficiency greatly reduces the spatial correlation of the antenna and realizes decoupling. The coupling resonant cavity is decoupled by two resonant units composed of capacitors and inductors, and direct coupling and cross coupling between them.
Example Embodiment
[0025] Example 3
[0026] The decoupling network realized by the decoupling method of the MIMO antenna of the mobile communication system terminal, such as figure 1 As shown, it includes antenna 1 and port 1 corresponding to antenna 1, antenna 2 and port 2 corresponding to antenna 2, coupling resonant cavity; the power fed into port 1 is consumed through three paths: path 1 radiates to free space; Path 2 is coupled to antenna 2 through free space and causes interference to antenna 2; while the power of path 3 is coupled to antenna 2 through a coupling resonant cavity; the coupling resonant cavity can make the coupling through path 2 and path 3 equal amplitude Reverse phase, port 2 will not receive power from port 1, and decoupling is achieved. In the above figure, the core part is the coupling resonant cavity, and its different forms of realization correspond to different forms of circuit forms for solving multi-antenna coupling. The realization of the circuit in the form of an ...
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