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Hi all,
I'll been looking for a microwave (>10GHz) phase detector. The only ICs that came across is something called a "sampling phase detector". From looking at the datasheets of those ICs, it seems like the sampling phase detector is measuring the frequency difference between two input...
Hi shrestharekha,
S11 = return loss
S21 = through port
S31 = coupled port
S41 = isolation port
These parameter can have different meaning depending on how you define port 1,2,3, and 4. Generally, people stick to this convention.
Hope this helps,
Microwave123
Hi bee5906,
Here is a general approach.
1) Plot Stability Circles, NF circles, and gain circles on the Smith Chart.
2) Match input for NF and stability.
3) Match output for gain and stability.
4) Simulate your circuit and make sure you have the basic functionality over a narrow band.
5) Run...
Hi lindt,
Stripline is buried inside the dielectric with two ground conductor above and below it. (3 layer substrate)
Microstrip is exposed to air and only have one ground conductor below it. (2 layer substrate)
Hope this helps,
Microwave123
It's difficult to implement a 1:4 wilkinson divider in planar format because the isolation resistors need to be connected to a junction that is not ground. The easiest way is to have two stages like tony_lth mentioned. If you have to use a 1:4 wilkinson, you can use the bottom of the board for...
Hi Samkeet,
If the "gap" from your trace to the ground plane is more than 2 times the width of the trace, you can consider it as microstrip. This is a rule of thumb only.
If you want to know more accurately, one way you can find out is to use a CPW characteristic impedance calculator and...
Hi all,
Theoretically, the S parameter of the equally power divided T-junction with quarterwave, (Z0=70.71 ohms) transformation at the output ports is
( 0 -j/sqrt(2) -j/sqrt(2) )
( -j/sqrt(2) 1/2 -1/2 )
( -j/sqrt(2) -1/2 1/2 )
Here S12=S21, S13=S31...
Re: what is the circuit for reducing power consumption
If you leave the PCB track open, all the power will reflect back which can cause catastrophic failure in your system. (I assume you are designing RF PCB since you talk about signal reflection)
How much power is dissipating on the...
Re: what is the circuit for reducing power consumption
Hi,
You posted the exact same question couple of hours ago. Please don't spam the forum with repeated post.
Can you please give more details about your question? What electronic circuit are you referring to? Power supply system...
A patch antenna is a rectangular structure. The layers should be as follows.
Top = Metal
Middle = Substrate
Bottom = Ground Metal
Draw one box for each layer. All of shape are rectangular boxes. It should be an easy exercise once you go through the microstrip line tutorial from Ansys...
Log into Ansys Customer Portal and download the HFSS intro. files. Go through their tutorials on how to create structures.
After finishing the tutorial, you should be able to draw your patch antenna.
Microwave123
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