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How about setting ports power? How much must be power at port1 & port2?
How to check about receiver attenuator "internal one"? I could not find them for N5242A PNA-X Network Analyzer
Dear all,
I have two amplifiers "driver stage and final stage", and will perform power measurements. Usually, we use isolator between two stages for safety purposes. But, unfortunately I do not have isolator at my lab and do not have budget to buy new one. As per checked, the high power one is...
So, that means I have to remove the attenuator and measure again?
1635126601
I also have used external DC block "Agilent 11742A Blocking Capacitor"
1635126745
How about S21?
Dear All,
please I need your help and advise upon the following:
I have designed and fabricated PA, during the simulation the results was very good. During the measurements using VNA "Keysight E5071C model", I got unexpected S22 (almost 0 dB), and also S21 (below 0 dB). For S11 I think it is...
Thanks for the valuable information.
Output power of my driver amplifier is about 38 dBm and the target frequency is 3.4-3.6 GHz. So, how much should be the power, frequency, and isolation of the isolator?
For attenuator, how much should be the frequency range for PA designed at 3.4-3.6 GHz?
Hi,
Please I need help with the following:
I'm doing high power PA of about 43 dBm (about 20 watt). I will use a driver stage In front of the final stage, and will have to use isolator between both stages. My question how to choose the suitable isolator? Frequency? power? and Isolation...
Hi,
I'm doing RF power amplifier design. I 've finished the simulation process and now will do the fabrication (PCB fabrication). Please I need advise upon the following:
For stability circuit I will use resistors to stability the amplifier. I used ideal resistor during the simulation, and now...
The drain current of aux when simulated standalone is totally different from that one simulated in full DPA. For example, IDS of aux standalone at input power of 10 dBm (off-state) is 0. After combined in full DPA, the current of aux at the same input power increased to 114 mA. I do not...
Hi,
Based on doherty power amplifier theory, the main (carrier) amplifier should be matched to 100 ohm at low input power levels and to 50 ohm at high power levels. Through performed load pull, I got two different impedances for low and high power matching.
1. Z= 14.322+j4.960 to be matched...
@BigBoss If the PCB is Double Sided ( Bottom Side is completely GND ), connection method of Decoupling Capacitors is completely wrong.A single screw cannot provide a good GND connection.There must be many VIAs connected to Bottom Side ( GND). How if I use single screw on the center of the...
Based in your experience, how much the stability factor K (minimum value) should be? Theoretically I know that it should be K>1, but I need to know based in your experience the margin between simulation and measurements?
For example if the K= 1.2 during the simulation, will be stable during the...
What is your opinion about the harmonic termination in the output matching network? As during my design process i only considered the fundamental matching and Ignore the harmonics?
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