Ultra Low Loss Military Grade Helium Hotspot Resonant Cavity RF Filter (US915)

McGill Microwave Systems, a leader in the supply of RF/microwave antennas and interconnect solutions for the military, commercial and aerospace markets, has innovated a new ultra-high-performance resonant cavity filter – specifically designed for Helium Hotspot/IoT applications and available in EU868 and US915 frequency band versions.

This unique and ultra-high-performance military-grade filter design by McGill Microwave is vastly superior to alternative SAW (Surface Acoustic Wave) technology filters, which typically have large associated insertion losses of between 2.2 and 4dB – resulting in significantly reduced signal levels, in excess of 50%, being received by the hotspot, reduced witnessing/beacons and a reduction of HNT generation.

This military-grade filter designed by McGill Microwave Systems is unique as it uses a completely different high-technology filter design, called resonant cavity, which offers dramatically lower insertion loss through the filter – typically 0.4dB.

The use of this unique Helium Hotspot filter increases the received power levels at the hotspot by up to 50% when compared to SAW filters.

This directly results in a significant increase in the number of witnessed beacons (and therefore HNT generation) in applications where Helium Hotspot performance is affected by RF noise performance, or hotspot designs which have been manufactured with little or no filtering of the received witness signals.

This filter must be installed directly connected to the hotspot antenna – therefore in all outdoor applications this means the filter will be fully exposed to the outdoor elements.

As such, these filters are fully IP67 waterproof-sealing rated, a specification commonly used in military applications.

Another unique feature of this design is the connector types – in this case both connectors are N Type Female and N Type Male.

This removes the need to use additional adaptors to connect this filter between existing McGill antennas and RF cable assemblies.

Many alternative commercially available SAW filter designs use SMA Female connectors – resulting in the need to use two more adaptors to fit their SAW filter to existing antennas and cable assemblies.

The use of two additional adaptors results in a further performance degradation of up to another 0.6dB signal loss and further reduced performance, compared to this unique Helium filter design.

Also available in EU868 frequency band versions with identical performance specifications.

Electrical Specifications