Showing posts from February 21, 2016

Mitigating Cosite Interference in UAVs

by Doug King dking(at)

Military radios must be able to operate in severe cosite interference environments (Figure 1.1 defines cosite interference). Cosite interference is a problem faced by many RF and microwave communications platforms; including Unmanned Systems. Military radios often operate in close proximity to additional radios, giving rise to cosite interference. The following article explains the issues associated with military radios operating in close proximity to additional interferers and how Tunable Filters are utilized in real-time applications. Finally, MPG-Pole/Zero’s recent advances in mitigating cosite interference are summarized.

Issues associated with military radios operating in close proximity to additional interferers: 
Multiple transmitters coupled to antennas in close proximity create a condition called reverse intermodulation, characterized by the coupling of energy from one transmitter into the antenna of another, creating a simultaneous flow of …

Joint Unmanned Aerial Vehicle (UAV) Swarming Integration Testing

by F. Patrick Filbert, Subject Matter Analyst-UAS, frederic.filbert.ctr(at)

As technology improves, so does the capacity to expand a defensive perimeter to ever increasing ranges both horizontally and vertically. Identifying ways to penetrate this perimeter with assets and capabilities that do not require ever more expensive solutions requires creative use of current and emerging technological advances. Potential adversaries understand the United States (U.S.) is extremely technologically advanced with its warfighting systems. This requires a thinking enemy to develop ways to keep America’s advanced systems outside their sphere of influence; specifically, to both deny and create an inability to gain access to specific areas of operation. In the current vernacular, this is called creating an anti-access/area denial (A2/AD) environment which has, as its backbone, advanced integrated air defense systems (IADS).

A Bit of History 
Being able to provide a “layered” offensive capabil…