This filter has been studied and designed for civil and military applications on the frequency ranges dedicated to the Ministry of Defense such as the Police or Fire Brigade services from 70 to 79MHz.
Thanks to its small size and low weight it can be installed in existing telecommunications systems or those with limited space. 
Completely eliminates broadcast frequencies from 88 to 108MHz with over 60dB of attenuation. In band it has an insertion loss of less than 1dB with an excellent return loss at both input and output (S11 and S22) of at least -20dB.

Ideal for installations in tunnels/motorway sections, radio links or directly on vehicles thanks to its anti-vibration treatment.