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## Method of Moment- S11, Gain and Directivity of dipole antenna

Dear, i will be grateful if anyone can send me the matlab code for using Method of Moment technique to find out s11, directivity and gain of dipole antenna. Thanx

## FIR Filter general question

Dea Forum Im designing a FIR filter, in this case a low pass. I get the coefficients from matlab (no matter from where..) ,that are from 0 to 1, in floating point. Now, I want to implement this FIR in my FPGA ,with buil in 18x18 multiplier. So,I transform the coefficient in integer value of max 17 bit (1 bit for sign) ,multipling the big

## H field measurements with waveguide twist

I am trying to get the value of the h field with a horn antenna as a reference antenna. I used a 90 degrees waveguide twist with the horn antenna in preset to measure le level of the received signal. But I am getting strange values. Am I proceeding the right way to measure the h field? If yes is it a scaling issue if the values that I?ve got? I

## PLL gain and phase margin

If you are able to use matlab , you can replace PLL blocks with their mathematicaly linear models.Otherwise Nonlinear elements won't give you any insight.

## Slotted Waveguide Antenna

Hello, I see that slotted waveguide antennas are usually built from elements with diagonal offset (as shown in attached figure). The longitudinal offset is understood to me (phase difference), however the horizontal offset is not clear. If the waveguide is excited by TE 10 fundamental mode, the E field keeps his sign along X axis. Can you

## Instantaneous input power for harmonic power simulation in ADS

I did simulate a microstrip line in a EM solver, and extracted the distributed circuit parameters in a matlab script. With these parameters, I can build a circuit in ADS to which has comparable S-parameters with the EM solver simulation. This gives my linear circuit parameters. Further, I introduced some dielectric materials onto the microstrip

## MATLAB code of Bit Error Rate of UWB transceiver

Hi I would like to display the BER of Ultra wideband transceiver. Taking account that i designed this transceiver in ADS then i extract its output signal with the extension .csv. I put this output file.csv in the same location of file.m then i would like to calculate its BER. I'm so gratefull if you can give me a clear tutorial to display BER;

## Solution of Linear Equation using MATLAB

A = b = .' size(A)=5x5 rank(A)=3 det(A)=0 So A*x = b does not have unique solution. Solution x is x = d + t1*c1 + t2*c2. Here d = .' c1 = .' c2 = [

## 1~1.5 GHz Waveguide bandpass filter design tool

Hi, i try to make a waveguide bandpass filter for 1~1.5 GHz I am searching waveguide filter design tools. but some tools support above 10 GHz. Is there any waveguide design guide or tool for 1~1.5 GHz band pass filter. Also, it should be easy to implement the filter. Thank you.

## HFSS Transient Solution

Help me Please!!! How i can use hfss transient solution for waveguide?

## Implementation of sine cosine using LUT

CORDIC is an algorithm for performing calculations. A LUT is simply that, a look-up table: phase in, amplitude out. The CORDIC implementation takes several cycles to produce an output; a LUT produces an output in a single cycle. I suspect matlab recommends a LUT based approach because it’s faster.

## Spectre RF Envelope Simulation for Wireless Transmitter with Switched-Cap Baseband

Hi, I'm designing a wireless transmitter that consists of a DAC, a switched-cap baseband filter and a passive upconverter. I'm trying to simulate the spectral performance (ACLR and EVM) and produce constellation plots using QAM signals. The signals have been generated in matlab with RRC pulse shaping or come straight from th

## Help Debugging Turbo Decoder Implementation in Matlab

For my research, i need to implement a Turbo Decoder to test a few things. I was able to write the BCJR algorithm code in matlab and for the most part, it works fine. By working fine, i mean that after a number of iterations, the number of errors reduces to zero or flatttens out. Where i am having a problem is that there are times where the number

## How to perform FFT on random data signal correctly in MATLAB?

Hello, I am a student doing research in high-speed electrical link. I have came up with a new signaling scheme, and want to see spectrum plot of it but not sure how to correctly perform fft on the signal in matlab. My signaling scheme, uses phase modulation to have same spectral efficiency as PAM-4 signal (which is 2bits/UI) but has one-UI tha

## How to perform FFT on random data signal in MATLAB?

Hello, I am a student doing research in high-speed electrical link. I have came up with a new signaling scheme, and want to see spectrum plot of it but not sure how to correctly perform fft on the signal in matlab. My signaling scheme, uses phase modulation to have same spectral efficiency as PAM-4 signal (which is 2bits/UI) but has one-UI tha

## Basic question on cassegrain antenna

What is the best reflecting coating for a cassegrain reflector antennas? Was looking at this site to buy some but wondering if there are better coatings out there that make a difference?

## "Waveguide ports must be aligned with Cartesian coordinate planes" error

I designed i yagi patch antenna with balun(ms-to-cps transition). When i try to simulate, i get this error. I guess it might be because of the sma connector placement but still couldn't figure out why."waveguide ports must be aligned with Cartesian coordinate planes for the transient solver"

## Arduino-Pc interface

Hello, im trying to interface my arduino uno with matlab. however, when i try to load my code in IDE software it shows the error "avrdue:ser_open():cant open device '\\.\COM4":the system cannod find the file specified." this in turn results in the connection error in matlab "Failed to open the serial port COM4 to communicate wih the board u

## How to find cutoff frequency of the circuits

Simply calculate voltage transfer function. Then evaluate cutoff frequency by symbolic math tool such as Mathematica, Maple, Maxima, Symbolic Math Toolbox in matlab, etc. Or use SapWin.

## How audio signal can be modulated using qammod ????

i read a audio signal from my laptop using audioread matlab function, audio signal contains some decimel positive and negative value. is there any way to convert these decimel value into binary bitstream. if it is not possible, then how can i modulate the audio signal like 256-QAM using qammod funtion. please help. if the question is not clear you