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L1 and C4 should form a high-pass filter, and C5 should only block the DC current;
The transmitting link L5 and C16 are notch filters, filtering about 125Mhz signals. The other C10, L13, C9 and L4 should be band-stopped. The filtered frequency band can be simulated. At the same time, L4/C14/C13 should also have an impedance matching function.
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