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Yes, this is true in my case . I had falsely understood that S21 provides the power gain taking as the overall power provided by the source as an input (ie Pin=Eg^2/Rsource) but now it's all clear to me . Thank you for your answers ?
Alright, so AC analysis gives you the voltage gain, therefore : A_ac_analysis= 20*log(Vout/Vin). However S21 gives you the root of the ratio of the power delivered to the load and the available power form the source ,thus S21=20*log(2*Vout/Vsource) (assuming that both source and load are 50...
Hi fellow designers,
I know this has been asked before but I was not able to understand the actual difference.
I have designed the following single tuned amplifeir that should provide a 20 dB gain at 30 MHz to a 50 ohm load with a 1 MHz bandwidth.
Doing AC analysis proves that the amplifier...
the pcb i have designed is very small (about 1cmx1cm) the SMA's i have have ground pins of 4.75 mm in length so a part of them exceeds the ground plain and fall on the transmission lines of my circuit. That's why i need to shorten the ground pins of my connector.
Yeah , i surely can bend the gnd pins, either way that won't affect the operation of my circuit,will it?
Kalamata olives are the best and i have my own production, if i fail as an engineer i will start a career as a farmer :P
Hello,
I have designed a rather small rf ciruit and the long sma ground pins are causing problems because they are falling int the circuit and i can't make longer transmition lines as they are causing problems in the simulation.Is it possible to shorten the sma's ground pins to fit my pcb...
@barry , I use the ROG4003C substrate with Er=3.55 . The problem is caused by the substrate height(i chose 1.524 mm) .
@jiripovlika. The input frequency is only 10 MHz , is the possible mismatch going to cause problems?
Sorry if my questions seem naive but this is my very first PCB.
Hello fellow designers,
i have designed a UWB gaussian pulse generator . The input is 10 MHz -1.5/1.5 square pulse and the output is a gaussian pulse which has a duration of 200 psec. I have to design the pcb now and i have some concerns regarding the sma connectors. I have chose to use edge...
Hello,
i want to make pcb footprints for a diode i am going to use.I read the datasheet(pg 6,B11 model.The numbers are in mills) to see its dimensions but they are in fractional form and i can't understand them.Can anyone help me?
Thanks in advance
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Did a little...
Hello everyone,
I've just finished the design of my circuit and it's time to design the pcb. I did a little research and i found that both the rogers4003C and the rogers3035 laminate do the work for my design.My question is which one is easiest to find in the market and what about the prices...
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