Hi team,
I am looking for help design an RC phase shift oscillator with a frequency of 400MHz. The simulation on proteus is not showing any waveform. I would appreciate if anyone could assist .Thanks

 

Welcome to AAC, @Binus01
Please show a schematic of your circuit otherwise we would only be guessing.

 

Welcome to AAC, @Binus01
Please show a schematic of your circuit otherwise we would only be guessing.

Okay thanks , below attached is the picture of the trials

 

Disregarding the mentioned frequency of 400MHz - you should re-check the shown circuit (in particular the function of resistor R1).
More than that - what is the purpose of the shown input signal source?

 

Hi team,
I am looking for help design an RC phase shift oscillator with a frequency of 400MHz. The simulation on proteus is not showing any waveform. I would appreciate if anyone could assist .Thanks

400MHz is optimistic for an LM358.
Component values suggest about 15kHz.

 

400MHz is optimistic for an LM358.
Component values suggest about 15kHz.

What size of the op amp would do

 

What size of the op amp would do

Generally, op-amps don’t do 400MHz.

For a phase shift oscillator to work, the amplifier must have gain of at least 20dB at the oscillator frequency, and very little phase shift of its own. So you need something with a gain-bandwidth product of >10GHz.
Good luck.

You should also learn how to calculate the component values, as you are out by more than four orders of magnitude.
https://en.wikipedia.org/wiki/Phase-shift_oscillator

 

At that frequency a Colpitts or Hartley oscillator design may be more appropriate.

 

At that frequency a Colpitts or Hartley oscillator design may be more appropriate.

At that frequency, any other oscillator would be more appropriate, except, perhaps, a 555.
At the nearby 418MHz popular remote control frequency, SAW (surface acoustic wave) oscillators are popular.

 

At that frequency a Colpitts or Hartley oscillator design may be more appropriate.

Even then special techniques in design and construction may be required.

 

VHF/UHF Oscillator design

 

Your circuit has some serious problems.
Here is a phase shift oscillator that works fine: