Project Examples

SpectraNet has been designing point-to-point microwave backhaul networks used by the major US cellular carriers and enterprise service providers for over 15 years. Using judicious choice of network topology, radios, frequencies, and antenna sizes, we find the right balance to exceed service level agreement requirements while minimizing network costs. Read more hereā€¦

Microwave Backhaul

Links and Fresnel zones from microwave software package can be imported into Google Earth to validate line-of-sight.

High-Speed Video Links for Port Security

Green lines are Gigabit Ethernet Millimeter-wave links (70-80 GHz) for high speed video as part of a Homeland Security project. Blue links are 23 GHz operating at 300 Mbps. All designs, frequency coordination and licensing performed by SpectraNet.

Terrain and Clutter Path Profiles


In this example, we used 1/3 second terrain elevation data with high-resolution LIDAR clutter data.

Multipath Theoretical Analysis

Multipath fading prediction vs. K factor showing deep fades for certain refractive index gradients that may sporadically occur for this region.

Multipath Fading Measurements

Measurements of receive power for over-the-water VHF links during fade events. Peak dB fade depths are in the same range as predicted theoretically.

Average Microwave Fade Duration vs. Margin

Calculation of the average fade duration versus fade margin for 6 & 11 GHz (Midwest US).

Microwave Network Reliability Summary

Imported links from the microwave program are imported into Excel where the reliability statistics are automatically created and summarized for multiple hops in a hub and spoke design.

HF Communications Modeling


Example modeling of ionospheric HF propagation reliability as a function of frequency, time of day, season, and year. Not shown: corresponding point-to-point latency modeling outputs and measurements.

Modeling of Ice Attenuation on Antenna Radome


Attenuation verses antenna radome ice thickness was calculated based on the measured complex permittivity of ice at various microwave frequencies.

Lab Simulation of Microwave Fading


A lab simulation was implemented using a voltage controlled variable attenuator driven by a function generator to create arbitrary fade events to assess switching performance in a protected SONET ring.

FSO Installation for NY-NJ Link after 9/11


Disaster recover: Free Space Optics (FSO) link connecting NJ and NY Merrill Lynch offices after 9/11. Photo by Mike Lucero.

Satellite Ground Station Noise Measurements

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Violet areas are near-line-of-sight regions common to the suspected noise source and the Satellite ground station, which experienced more noise when pointed in the Azimuth direction of a hydroelectric dam.