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Value proposition · Public Security sector
Antennas and combiners for emergency PMR and public-service networks
Why EMAR for this combination
Public Security use cases
Polo Marconi products for Public Security
Italian-made wideband omnidirectional antenna by Polo Marconi for critical links in PMR networks, telemetry and air-traffic-control applications.
Resonant cavity duplexer for PMR repeater sites. Allows using a single antenna for simultaneous TX and RX with TX/RX isolation >90 dB.
High-selectivity VHF/UHF cavity combiner for sharing a single antenna between 2-8 transmitters. Insertion loss < 1.5 dB, > 60 dB port-to-port isolation, aluminum cavity design for installation at hard-to-access sites.
High-Q cavity notch filter for rejection of interfering signals on towers with multiple transmitters. Rejection > 60 dB at notch frequency, adjustable rejection bandwidth from 25 to 200 kHz, insertion loss < 0.4 dB, 100W continuous power.
Multi-band combiner system for co-location of LTE 700/850 MHz, VHF 136-174 MHz, and UHF 380-512 MHz transmitters on a single site antenna. Inter-band isolation > 80 dB, insertion loss < 1.2 dB per band, 200W per port, modular 2 to 8 band configuration.
Let's discuss your specific case. EMAR SYSTEMS advises on selection, integration, and local support.
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