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Branch Guide Directional Couplers from the Flann Series 140 are particularly suited to applications where multihole couplers cannot be accommodated or tighter coupling values than those achievable from cross guide couplers are required.

Models are available in both 3 and 4 port configurations and standard coupling values are 3 dB, 6 dB and 10 dB. Couplers operating over the full waveguide band are available but for optimum coupling and directivity performance we recommend that the operating frequency range is limited to 25% of the full waveguide band. Please state the operating frequency range required when ordering.

Specifications:

          
ModelFrequency Range (GHz)WaveguideTypical performance for models operating over 25% of the full waveguide band.
Coupling Accuracy (dB)Coupling
Sensitivity(dB)
Directivity better than
(dB)
WGRWR3 dB6 dB10 dB
101402.60 - 3.9510322840.30.40.5±0.2525
11A1403.22 - 4.9011A402290.30.40.5±0.2525
121403.94 - 5.9912481870.30.40.5±0.2525
131404.64 - 7.0513581590.30.40.5±0.2525
141405.38 - 8.1814701370.30.40.5±0.2525
151406.58 - 10.015841120.30.40.5±0.2525
161408.20 - 12.516100900.30.40.5±0.2525
171409.84 - 15.017120750.30.40.5±0.2525
1814011.9 - 18.018140620.30.40.5±0.2525
1914014.5 - 22.01918051Specifications available on
request
2014017.6 - 26.72022042
2114021.7 - 33.02126034
2214026.4 - 40.12232028