State-of-the-art RF switching technologies employed on every Boeing aircraft for nearly 20 years, including new 787 Dreamliner

Boeing, the world’s largest aerospace company and second-largest commercial aircraft manufacturer, specified Dow-Key in the late-1980s as the preferred supplier of RF switches for use in its Traffic Collision Avoidance Systems and Instrument Landing Systems. Today, Dow-Key provides its switches for all of Boeing’s current fleet of commercial airplanes, including the 777, 767, 747, and 737, as well as the forthcoming state-of-the-art 787 Dreamliner.

Part of Boeing’s TCAS-II employs the use of two antennas, one of the top of the fuselage and one below. Internally, these antennas are connected either to one of two Mode S transponders, which provide redundant support for a portion of the TCAS-II. In order to connect one or the other of the transponders to the two antennas, two Dow-Key 402-167 switches are used.

 

L3 COMMUNICATIONS
Aviation Recorders

 

P/N 402-167

DowKey Microwave - RF Switches

Glendale International Ltd
533 Rayleigh Road
Thundersley
Essex SS7 3TN
United Kingdom
Telephone:
01268 741770
Fax:
01268 741780
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End Use Authorisation:
EU/0904/390/92