Electromechanical Switches

[tsubasa]

Hi all,
Are electromechanical switches absorbtive or reflective?

Thanks and best regards,

 

[Azulykit]

They can be either. Look up Dow Key and a supplier.

 

[tsubasa]

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

 

[dowjones]

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

regards

 

[vfone]

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]

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]

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,