Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
The difference between these 2 kind of antennas is not the performance, but the application. The dual-band antenna is proper for the application that you wanna used 2 different frequency band simultaneously but the reconfigurable one is proper for any application that used in various frequency...
Re: why in fourier transform we have to multiple with e^{-j\omega t}
From my understanding (that means it may be wrong).
The Fourier transform is a transformation method which objectively transform a function in normal basis into a polar basis.
This transformation resulting in representation of...
Just put all the data in the graphing software, for example, MS excel, Origin, and plot it.
I think all the simulation software and all sort of network analyzer have an option to export S11 data numerically.
I think the datasheet is reliable even if it only shows the best performance (which means that it maybe hard to get that performance; only proper condition can get that!)
There are so many things to make its performance more worse than that in the datasheet such as PCB layout, how well solder...
I've never used HFSS so I don't know what does the re-normalized means.
However, from my point of view, there are some differences between matching and terminating port.
Matching mainly focuses on the port you are using, to make sure that you can get the maximum power transfer.
But terminating...
Since a signal is the summation of many sinusoidal signals at different frequencies, so you can compare any signals by comparing their frequency components.
The FFT will give you all the frequency components of the signal and then you can check your signals that they are the same or not. If...
It's not necessary to be half-wavelength. It depends on your designing objective.
You should perform the simulation to see what happen at various element spacing.
Generally, small spacing give a high gain pattern but, at some point, the array pattern is far worst than you can use.
The simulation...
I think it's possible. Because the phase excitation can be calculated by the equation (from Balanis' Antenna theory textbook)
αn=-k*a*sin(θ0)*cos(Φ0-Φn).
You can steer its main beam to desired angle by putting angles (Φ0,θ0) in this equation.
I think that circular array might fit for your need. Its beam can be steered to cover 360 degrees in azimuthal plane.
The beam steering can be performed by adjusting the phase excitation of array elements.
iVenky is right.
Let's imagine that there is an unknown system characterized by h(n).
When you feed it with the input signal x(n), the output y(n) would be convolution of x(n)*h(n).
So, how can you find the output of this system? Firstly, you have to find what h(n) is. But how to know?
The...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
