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WM-20 Serie

Description of the radar set, tactical-technical characteristics

Figure 1: WM-20 Serie

Figure 1: WM-20 Serie

Specifications
frequency: X-Band
pulse repetition time (PRT):
pulse repetition frequency (PRF):
pulsewidth (τ):
receive time:
dead time:
peak power: 180 kW … 1 MW
average power:
instrumented range: 32 NM (≙ 60 km)
range resolution:
accuracy: 0.8 mrad
beamwidth:
hits per scan:
antenna rotation:
MTBCF:
MTTR:

WM-20 Serie

The WM-20 Serie are operating in X-Band track while scan fire-control radar systems developed in the late 1960s to early 1970s. In 1991, the CelsiusTech group introduced an extensive modernization package for the WM-20 radar family.

The radar employs a combined antenna system (CAS), which houses both search antenna including IFF in the standard Mark Ⅹ, and tracking radar antenna all inside a single radome. Both magnetron and traveling wave tube (TWT) versions were available. The typical peak power is 180 kW, but for the WM-25 this is increased to 200 kW with the aid of a 1 MW crossed field amplifier. Both search and tracking radar antennas can operate with a single transmitter. Whose output power is usually shared by waveguide switching for surveillance and air-target tracking. A double transmitter arrangement were available as well.

The WM-20 series of weapon control systems include the following variants:

The Mk. 92 Fire Control System is an Americanized version of the WM-25 radar family. Sperry Corp. is producing the Mk. 92 for use by the U.S. Navy, the U.S. Coast Guard, and foreign customers.

Picture gallery of WM-20 Serie

Figure 2: Mark 92 FCS
(© 2015 Jörg Waterstraat, www.kriegsschiffe.eu