"Central Plains" antenna "XBQ-350T" type notch filter has low insertion loss (L <= 1dB, H <= 3.7dB), high isolation (more than 30dB) etc., used in subway tunnel environment, the public security fire special 361~365 frequency band to band 365~366 interference in.

Trap the product compared with the traditional small insertion loss (L <= 1dB, H <= 3.7dB), to isolate high (more than 30dB, some frequency greater than 80dB) and other advantages, andthe inhibitory effect of jamming signal, convenient installation, no external load.

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