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The Mitre Corporation (stylized as The MITRE Corporation and MITRE) is an American not-for-profit organization with dual headquarters in Bedford, Massachusetts, and McLean, Virginia. It manages federally funded research and development centers (FFRDCs) supporting various U.S. government agencies in the aviation, defense, healthcare, homeland ...
Joint Tactical Information Distribution System Users, 1990. The Joint Tactical Information Distribution System (JTIDS) is an L band Distributed Time Division Multiple Access (DTDMA) network radio system used by the United States Department of Defense and their allies to support data communications needs, principally in the air and missile defense community.
Boswell Bay, Alaska White Alice Site, Tropospheric scatter antenna and feeder. Pacific Scatter System Tropospheric scatter , also known as troposcatter , is a method of communicating with microwave radio signals over considerable distances – often up to 500 kilometres (310 mi) and further depending on frequency of operation, equipment type ...
A choke ring antenna is a directional antenna designed for reception of GNSS signals from satellites. It consists of a number of concentric conductive cylinders around a central antenna. The first choke ring antennas were invented at JPL; [ 2 ] since 1989 they have been improved and extended by many companies.
MVDDS spectrum was auctioned by the FCC in two separate auctions.The first was FCC auction 53 (1/14/2004 - 1/27/2004) and this auction with 14 qualified bidders lasted 49 rounds over 9 bidding days. 10 bidders won 192 licenses with Gross Bids of $136,936,200 [4] Each allocated license is exclusive in one geographic area.
The antenna array is composed of three concentric rings of antenna elements. Each ring of elements receives RF signals for an assigned portion of the 1.5 to 30-MHz radio spectrum. The outer ring normally covers the 2 to 6-MHz range (band A), but also provides reduced coverage down to 1.5 MHz.
The pass-bands and stop-bands in photonic crystals were first reduced to practice by Melvin M. Weiner [4] who called those crystals "discrete phase-ordered media." He achieved those results by extending Darwin's [5] dynamical theory for x-ray Bragg diffraction to arbitrary wavelengths, angles of incidence, and cases where the incident wavefront at a lattice plane is scattered appreciably in ...
The VHF Data Link or VHF Digital Link (VDL) is a means of sending information between aircraft and ground stations (and in the case of VDL Mode 4, other aircraft).). Aeronautical VHF data links use the band 117.975–137 MHz assigned by the International Telecommunication Union to Aeronautical mobile