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Electromechanical Switches

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tsubasa

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Hi all,
Are electromechanical switches absorbtive or reflective?

Thanks and best regards,
 

tsubasa

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I'n looking specifically for narda switches; and they don't have such an information in their datasheets
 

dowjones

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hi. electromechanical switches do usually show very high isolation 60-80dB, which probably makes irrelevant whether they are reflective or absorptive

regards
 

vfone

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If the switch is in the high isolation state (>20dB) where the VSWR is high, that means is reflective.
There are some options where using a combination of multiple switch contacts, to terminate for example the isolated port with 50 ohms and become absorptive.
In this way the switch is absorptive regardless the state position.
 

sergio mariotti

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vfone said:
If the switch is in the high isolation state (>20dB) where the VSWR is high, that means is reflective.
There are some options where using a combination of multiple switch contacts, to terminate for example the isolated port with 50 ohms and become absorptive.
In this way the switch is absorptive regardless the state position.

I agree, but I would add that of course the absorbitive switch is more expensive than reflective.
Also, the absorbitive one has slightly worst VSWR along through line.
 

tsubasa

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Also, the absorbitive one has slightly worst VSWR along through line.

I couldn't understand what does it mean exactly? How can absorbtive switch has worst VSWR?

Thanks,
 

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