Diode detector Tranmission Line Problem

[pnsakanjankumar]

hi friends,
In the diode detector which i made i am not sure whether to use TL in the second part or not.
What i think is since its a DC circuit there is no need of TLines.
Please clarify my doubt
thanks.

 

[vfone]

If there is just DC you don't need a matched transmission line.

 

[pnsakanjankumar]

Thanks for the reply
I forgot to attach the figure. Here is the figure

So according to you i should remove TL.
But when i attach Pads(of diode,Res,Cap) i am sure there will be a TL line.
When i simulate the circuit the current flowing thro' R1(0.6 mA) is lesser than the current flow through the diode(D2)(1 mA). I don't get it there's a problem created by the TLine.
Please help me in resolving it.

 

[vfone]

First, I don't understand the meaning of R1 series resistor in this detector.
You have concerns about using a TL on the DC side of the detector, but I don't see any matching components on the RF side of the detector.
Check Agilent and Avago papers related to impedance matching of the diode detectors and see how this matching improve the detector efficiency.

 

[pnsakanjankumar]

Vfone At the RF side there in the shunt side there is a 68 ohm resistor which is used for broadband match. R1, R2 and D2 are used for temperature compensation and also for linearity.
I have seen the papers related to it. In those papers all the matching networks used are for narrow band.
Now i want to know whether there should be any tline in the path R1-R2.

 

[ltrlspree]

which is the avago related AN? Is it possible to know?
would like to have a look as well.