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I've been designing a microstrip antenna which is radiated at 2.4 Ghz,
but somehow from the simulation result(see image below), my antenna also radiates at around 4.6 Ghz and 5.2 Ghz.
I need some theory to explain about the second frequency and why does it occur.
Please help!
**broken link...
I didn't confuse voltage with power.
what I confuse is since the voltage drop on every resistor why does it not equal to the total voltage from source, this idea is true when the circuit is in series.
From wikipedia
I know this is a very very basic question, but the story behind this idea seems to confuse me.
From the definition of volatage, voltage = work you have to do to move a unit charge through the resistor.
**broken link removed**
When the circuit combine in parallel(say battery is 5V, R1=R2), the...
I'm learning about an antenna theory and have a few question.
According to the image here.
Can anybody explain what's going on in the image?
I've done lots of calculation, but still have no idea what's going on.
My question is
1. How dipole produce a loop of electric field? (How a loop...
I'm trying to understand the concept of Fourier transform and get stuck on something very simple.
My question is, what does F(jω) represent in frequency domain?
If I have a voltage source v(t), v(t) represents voltage as a function of time, therefore I know the voltage at any given time.
But...
Thank you so much for the reply.
Can you tell me the "diode-capacitor-resistor" circuit from #1,#2?
I try to find this from many textbooks but most of them are about the square wave.
I only found the #3 by using the integrator. And If I decease the duty cycle it will be a sawtooth, not what I...
I have a question about a 555 Timer.
Is it possible to create the following waveform using a 555 Timer?
If it's possible.
What is the configuration and circuit element in order to create the waveform?
Astable or monostable or both?
Thank you!
According to the question below, both sine and cosine are component of the signal.
My question is how do we know that the omega is equal to 2pi/19, I mean how to calculate that?
What is a theory behind this? I can calculate the omega if there's only one function but this one has two.
Please...
I'm working with the 8051 microcontroller in Proteus and want see the internal data memory.
I've been looking for it for hours, please help!
I use Proteus 7.6, ISIS 7.
This is a very basic question but I'm confused about the way we represent a signal in frequency domain.
Let's say I have a cosine signal in time domain : v(t)=5cos(2*pi*1000*t)
In frequency domain, why do we get a graph like this?
**broken link removed**
I know that our signal has amplitude...
I've been studying about signals and systems.
My question is on any systems why we always want to know the impluse response?
I know that impluse has infinite amplitude and it has the same magnitude in all frequency range but why is that important?
sin&cos signal also have the same amplitude...
I have a few question about cutoff frequency.
First, Why we define cutoff frequency at -3db from midband?
I know that the power is reduced by one half at 3db, but why don't we define at the point where power is starting to reduce?
Is the power reduce by one half make an equipment starting to...
What is the value used as the reference value to determine the transistor is in sat or active?
Before we enforce Vce to be 0.2V. There's reference volt value. On different book they said the different value
ex. (Vce<1V, Vce<0.7V, Vce<0.2V )--->transistor is in saturation mode and we enforce...
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