Questions tagged [lumped]
The lumped tag has no usage guidance.
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Evaluating antenna models as presented in a recent research paper
Here are lumped element equivalent circuit antenna models from a recent research paper (published in the INTERNATIONAL JOURNAL OF MICROWAVE AND OPTICAL TECHNOLOGY in 2019):
Typical Approach of ...
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Defining lumped and distributed elements according to signal travel time
We define distributed elements as circuit elements where the physical dimensions of the elements cannot be ignored and the differential equations stating the current, voltage etc also contain a ...
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Lumped Element Equivalent Circuit for Microstrip line
I am breaking my head already for 2 days on this problem I have.
I want to represent my microstrip line in lumped components.
My microstrip line has the following characterstics:
$$
Z_0 = 50 \text{ [$\...
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How can I replace lumped capacitor and inductor with microstrip line?
This is a spst switch working on 2.4 GHz. I want to replace the inductor and capacitors with microstrip line. What is the easy way to do that?
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Transmission line model VS lumped parameters models
Both the lumped parameters models vs transmission line models use RLC components for modelling.
This is where I am confused and cannot see the difference between the two.
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Different 50Ohm-matched condition for different length of metamaterial waveguide
Based on coplanar waveguide, I am designing a meta-material waveguide by inserting lumped-element inductors along the center line.
Here are some parameters:
Target frequency: 10-20 GHz
Size of lump ...
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Lumped Circuit Abstraction extreme cases
When using lumped circuit abstraction, if we consider two ends of a voltage source connected with ideal wire KVL won't hold; and also if we put two current sources opposite two each other, then the ...
user249466
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Why does lumped discipline not hold as dimension approaches operating signal wavelength?
I'm studying some basic introduction to the lumped matter discipline on my own. I completely understand where the first two constraints come from (i.e. lumped matter can only interact through their ...
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Design a passive amplifier
I am trying to increase the amplitude of my generated electrical signal by a passive amplifier. I have seen so many complex RLC circuits. But I have limited space for design, therefore, can I use a ...
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Lumped parameter vs transmission line model for a piece of cable
I would like to model a piece of cable (less than 5m) over a frequency range of DC to \$1\mathrm{MHz}\$. I am however doubting if I can approximate it by a lumped parameter model (mainly at \$1\mathrm{...
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Difference between a circuit developed using lumped elements and microstrip elements (transmission line)
As the title implies, what is the difference between lumped elements and microstrip elements? According to my understanding lumped elements are discrete elements but I don't understand what is the ...
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How do I set up a lumped element equivalent circuit?
In the treatment of metamaterials, optical problems and antennas, very often a simplified model is extracted by considering only lumped elements. In some cases this is fairly obvious, for example in ...
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Lumped-element delay lines using LC circuit
I was told that the above circuit is used to delay signal. The time constant per element is t = sqrt(LC). The expression was provided by the book I'm reading, but it did not include how the time ...
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Why the circuit theory works well when a lumped-parameter system has dimensions of one tenth of the electromagnetic wavelength?
Why the circuit theory works well when a lumped-parameter system has dimensions of one tenth of the electromagnetic wavelength? Why not one third or any other ratio of the electromagnetic wavelength?
...
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How does short length of transmission line approximate to a wire?
Suppose I have a transmission line of length \$L\$ with characteristic impedance \$Z_0\$ and load voltage \$Z_L\$. If it is connected to a ideal sinusoidal voltage source \$V_s\$, then the voltage ...
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Explanation of lumped matter discipline
There are a total of three postulates of lumped matter discipline.
Rate of change of magnetic flux outside the conductor is zero.
The change of chrage inside a conductor is zero.
Signal timescales ...
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Why don't we talk about a signal reflection when we treat a lumped element model of a circuit?
I don't clearly understand why I have never seen a talk about a signal reflection in a lumped element model.
When there is a transmission line connected to circuits A (signal emitter) and B (signal ...
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How is an inductor a lumped element?
While learning the Lumped Circuit Abstraction (and the Lumped elements discipline), an inductor was considered a lumped element. But I fail to see how it fits the requirements of LCA:
For it, the \$\...
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Questions and confusions on transmission line theory and lumped element model
I want to model a simple signal transmission system by considering it as travelling through a transmission line.
Here is the system:
The original signal generated by the transducer is 0 to 10V step ...
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