All Questions
Tagged with impedance-matching microwave
24
questions
1
vote
1
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159
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Intuitive explanation of shorted stub behaviour
Can someone please give me an intuitive explanation of shorted stub behaviour?
NOTE: This is not a duplicate of Intuitive explanation of open stub behaviour which has been narrowed to focus on open ...
0
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2
answers
220
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Intuitive explanation of open stub behaviour
Can someone please give me an intuitive explanation of open stubs?
I have the length-based mathematical derivation and explanation from my textbook, but I am looking for an intuitive one.
For example,...
1
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0
answers
47
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Matching network for two-port with internally matched inputs/outputs
Background
I had a lab in school where we were given an LNA with inputs/outputs matched to 50Ω, that will be connected to a 50Ω system:
The task was to design the input and output matching networks:
...
- 111
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0
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98
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Impedance matching
I am a newbie at microwave. I'm confused about impedance matching. So far just 50 Ω impedance stub in outside.
But in this example below I saw 75 Ω. I could use the Smith Chart but I didn't know how ...
- 99
0
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0
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37
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Binomial matching (RF & microwave)
In a Binomial Matching Transformer, we're expecting the reflection coefficient to be the following function:
\$\Gamma(\theta)=A(1+e^{-2j\theta})^N\$
What is the philosophy behind assuming this ...
4
votes
4
answers
588
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Tapered line for a SP4T RF switch
I need to use HMC241AQS16 brand RF SP8T switch on an FR-4 board. The RF ports of this QSOP package integrated circuit have 50 ohms impedance. But there is a problem, the leads of the chip have just 0....
- 311
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0
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91
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Input and output impedance matching for the HMC414 amplifier
I have a question about the impedance matching at the input and output of the HMC414 power amplifier. I don't know exactly where to put this matching, and I wouldn't want to make a mistake. The ...
0
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1
answer
233
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Impedance matching of an amplifier circuit with a filter at the input and output
I created an amplifier circuit with a filter on the output.
I did impedance matching on the input and then did matching on the output as well. From the graphs below, is the circuit more matched?
...
0
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0
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119
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Impedance matching - amplifier and surface acoustic wave (SAW) filter
How would I properly do impedance matching for the amplifier and saw filter at the output of the circuit?
-2
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1
answer
278
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How can I match the FET's input and output impedance?
I'm designing a FET mixer, so I have to match the FET's input and output to in and out port's impedance(50 ohm). I don't have the S-parameters, but I can set wide range of parameters(GS-resistance, DS-...
0
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3
answers
2k
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Deriving the S-parameters, different Matched Loads possible?
I guess this is more of a conceptual question but for the problem below Im having trouble getting started on how to derive the S parameters for the network.
I noticed that the network at 28.025 GHz ...
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1
vote
2
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157
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Path of a signal traveling on a mismatched transmission line
I have a basic question about the path of a signal traveling on a transmission line with a short circuit as termination.
Suppose that this line is driven by another line (at left) with Zc = 50 Ohm ...
- 3,550
0
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1
answer
215
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How is a transmission line with a different characterisitc impedance shown on the smith chart?
A transmission line can be shown on the smith chart as a clockwise rotation, each 180 degrees corresponding to a quarter wavelength. But this is when the characteristic impedance (Z0) of the ...
- 302
1
vote
2
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2k
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Quality factor and frequency bandwidth in a matching network
It is known that the quality factor appears in the formulas for transformation of an impedance series bipole to a parallel one. A simple example is this one:
Now I have three questions:
I have ...
- 3,550
0
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0
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177
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Line/load matching for electric power transmission
Impedance matching is a critical topic for microwave engineering where the signal wavelength becomes comparable to the physical sizes of components. Substitution of distributed component models for ...
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