attenuator
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7. Attenuators

Some measurements were carried out on the behaviour of attenuators specified up to 18 GHz. Two typical measurements are presented.

 

wpe34.jpg (6531 bytes)

Narda Attenuator

 

 

Conclusion: this attenuator can be used without any problem at 24 GHz.

 wpe41.jpg (69967 bytes)

 

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Midwest Microwave 10 dB attenuator
model 290

Conclusion: the plot shows a significant deviation above 18 GHz due to some self-resonance.

 

 

 wpe42.jpg (76034 bytes)

General conclusion:
When using attenuators out of the specified frequency range, individual measurements for calibration are needed.