Questions tagged [transmission-line]

A transmission line may refer to a cable or assembly that is designed to carry radio frequencies and must consider the wave nature of the signal. Coaxial cable is an example of a transmission line. It may also refer to high-voltage power transmission lines, used to transfer power from generating stations to consumers.

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Is it possible to add a component with an arbitrary impedance matrix to LTSPICE?

I would like to use the following workflow: Simulate the S parameters of coupled transmission lines in an electromagnetics tool (Sonnet etc.). Convert to impedance matrix if necessary. Plug the ...
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How can the Earth be used as a return path? Wouldn't the signal just dissipate after reaching the destination?

I was reading an academic document and I came across this statement: Telegraphy, 1747 (a singe-wire line with the Earth as a return conductor – the first transmission line) I can't imagine how that ...
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What does $\beta$ represent with respect to the length of a transmission line?

The picture below shows the ABCD parameters for a transmission line of length $l$ from this video. Question: What does $\beta$ represent?
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Can someone get electrocuted by holding one of the 3 phases in overhead transmission/distribution lines? [closed]

Three-phase transmission/distribution lines
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Interpretation of Generation and load power at a bus and understanding of slack bus

I was going through the IEEE 14 bus system data from [here] (https://ijireeice.com/wp-content/uploads/2013/03/IJIREEICE2E-a-shkti-Computation-of-final-21.6.14.pdf). I know that there are three type of ...
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Measuring the reflection coefficient $\Gamma$

I want to measure the reflection coefficient. I have the following circuit: With these measurements I get the following graphs: Is the reflection coefficient the negative peak of the RED signal ...
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Why is the change in reactive power not equal to the line reactance drop?

I am working on an equivalent network of a two bus system right now. I know the $P$, $Q$ and power factor at Bus 2. Bus 1 is taken as a slack bus ($V = 1 PU$, $\delta$ = 0). Using iterative ...
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Will the reflection from the load end of a transmission line affect the behaviour of an ideal voltage source?

Consider a transmission line with characteristic impedance of Z₀ and electrical length of λ/4. One end of the transmission line is terminated in a load of impedance (lets assume) 2Z₀. The other end is ...
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Why is electrical stress higher on the insulator string near the transmission conductor? [closed]

From my observations, it is because of the electric field around the conductor. As we go far from the conductor, the electric field starts decrease. That is why there is also unequal voltage ...
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Modeling a transmission line

I want to simulate a transmission line in PSPICE, however I ran into a problem. I got floating nodes error (I looked it up and I was suggested to put a ground on the far side of the transmission line ...
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Power combiner for I-Q signals in a transmitter

I have a transmitter project to implement. Part of the project is to combine an in-phase and an out of phase (90 degree difference) signal with a center frequency at 3.5GHz. I figured I could ...
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PCB Routing Considerations for multiple USB Port Types for USB 1.1 Full Speed

I wanted to make a device that has a USB A and a USB C connector on apposing sides of the PCB, similar to the attached image. These USB connectors would be connected to the same USB port, the MCU I ...
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Why does the signal have to travel a full round-trip before being captured by the receiver in reflected-wave switching?

Reflected-wave switching from Wikipedia contains the following paragraph: If, on the other hand, there is no termination at the end of the microstrip, and the pulse encounters an open circuit, it is ...
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Rise time and clock frequency: when does it start biting me?

I have spent quite a bit of time reading (mostly the questions and answers on here) about rise times of square waves and how they can cause transmission line effects (reflection, ringing, etc.). ...
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Resistance vs capacitance of conductor

Suppose we have a wire which transmits power. Is there a direct relationship between the resitance (or conductance) of the wire/m and the capacitance of the wire/m? Or they are independent of each ...
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Extend range of BLE devices

I would like to extend the range of two BLE devices. The first one is a VR BLE controller with a monopole pcb antenna. The second one is an ESP32 Tinypico with a chip antenna. I bought two pcb ...
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I need help understanding what the total Impedance in a delta connection is

I'm trying to upskill by teaching myself electrical engineering. I already have a degree in Theoretical physics and Pure mathematics so I don't mind math heavy answers and don't find the math's of the ...
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How to calculate the Change in Reactive Power in a Transmission Line

I am currently calculating the Reactive Power through a Transmission Line. To me, the given values are $$P_S, Q_S, V_S$$ . I have to find a so-called "Reference" Reactive Power for which ...
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common ground issue in signal transmission?

I am designing a device that output analog voltage in the range of -5 V to +5 V representing a certain measurement (single-ended earth grounded). My plan is to use a regular BNC cable, (earth ...
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How long can a transmission line with proper impedance matched be routed?

Would like to know the maximum length that I could route a transmission line for USB3.0 (SuperSpeed differential lines) and USB2.0 (DP/DM) in a proper impedance matched line at 90 ohms? There is some ...
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Is it ok to extend 16V AC output with 12V heavy duty electrical cable?

I have a AC 240V to AC 16V transformer to drive my gate opener. But the 240V power outlet is far from the gate. Is it ok to extend 16V AC output by using 12V heavy duty electrical cable? Transformer: ...
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How to terminate branches in a transmission line

some research has unfortunately not led to a clear result. Branches in transmission lines are not desirable, but if they are unavoidable the question arises how to properly terminate the individual ...
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Remote Sense Self Adjustable Power Supply

I been looking for an off the shelf power supply that can adjust its output voltage to compensate for losses, in my case in transmission line. Searching on DigiKey, I narrowed down my search to power ...
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Voltage drop impedance value

A single-phase circuit 60Hz transmission line is 45 miles long. Transmission line impedance z = 0.5 Ω/mi. The load on the transmission line is 75MW at 115kV with a 0.90 lagging power factor. Calculate ...
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