What are WSMA Connectors?

What are WSMA Connectors? How are they different from SMA connectors?

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- everything RF

Feb 20, 2022

WSMA connectors or Wiltron SMA connectors was a name given to precision SMA connectors manufactured by Wiltron. Wiltron was then acquired by Anritsu in 1990, however, the name stuck on. WSMA connectors have a diameter of 3.5 mm and have a lower reflection coefficient and losses than regular SMA connectors. They are compatible with SMA Connectors, K-Type (2.92 mm) connectors, 3.5 mm connectors and other WSMA connectors. Traditionally these connectors can operate up to a frequency of 26.5 GHz, however when mated with a Wiltron K (2.92 mm) connector, they can operate up to a frequency of 33 GHz.

Key Specifications of WSMA Connectors

  • Operating Frequency: Mode-free through 26.5 GHz.
  • Impedance: 50 Ohms
  • Dielectric: Air
  • RF Leakage: Typically, less than -100 dB
  • Mating Torque: 8 lb inches / 90 N cm
  • Operating Temperature: -65°C to +165°C
  • Outer Conductor Inner Diameter: 3.5 mm
  • Inter-mate ability: WSMA, SMA, 3.5mm, 2.92 mm

WSMA connectors are primarily used in precision measurement systems, to interconnect measurement apparatus when conducting high precision analysis.