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Attenuator pad design

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koontlim

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attenuator pad design

Hi i would like to design a variable attenuator pad (~18dB) using ADS Momentum Simulation. Did anyone have any good suggestion regarding the attenuator design info and link to design on that in microwave circuit?
 

electrical attenuator design

koontlim said:
Hi i would like to design a variable attenuator pad (~18dB) using @DS Momentum Simulation. Did anyone have any good suggestion regarding the attenuator design info and link to design on that in microwave circuit?
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Look at the attachment file. May be, it will helpful for you.
 

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    koontlim

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pi attenuator design

Hi i would like ask anyone know the constraint of designing passive attenuator design in microwave (pi-network, tee-network for example) ?
 

designing attenuator pads

You can calculate either a PI or T network. One will have more realizable values than the other depending on if you are building from lumped components, deposited as a thin flim, or thick film. If you are using lumped components you need to know to a degree the package parasitics since this will affect the attenuation over frequency. Capacitance in paralllel with the resistive material limits the amount of attenuation you can achieve. If designing a thin film then 2.5D EM simulation is very usefull.
 

attenuator pads equations

PI attenuator arrangement (almost) always usable for higher frequencies, because the attenuator "length" is only one resistor "long" opposite to the T arrangement , which is two component "long"
 

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