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70 Threads found on Cos Cos Theta
Hi, This is not correct because cos(cos(90-x) is not equal to cos^(90-x) whis is equal to cos(90-x)*cos(90-x). It can only be integrated numerically unless it has limits of 0 to pi where it's Bessel function.. Regards,
hi, how to write a program forcalculating cos angle(cos theta) in 8051 assembly language thank you
Are you using design compiler? If so check out... If you're not using design compiler. You can use a look up table. This is the ea
In reflector antenna, usually we use horn as the feed. It has been checked that the radiation patterns of the horn can be simulated as a function: \cos^q (\theta) . The power q has been chosen at each frequency to fit the horn patterns. I already have the radiation gain pattern of one horn, I am wondering how to approx i
If you see at the unit circle: 1. rotating by 90 degrees means swapping x and y axis (that is sin and cos), then sin(90+θ)=cos(θ) 2. rotating 180 degrees the waveform repeats with reversed sign, that means sin(180-θ)=-sin(-θ)=sin(θ) then the ratio sin(90+θ)/sin(180-θ) = (...)
Hi, I think you may have a problem with that, since Matlab hasn't 3D polar plot instruction. However I use a spherical triangular grid (either imported as ASCII from any 3D graphing tool, or generated manually) then use PATCH3 instruction to plot the triangles with the color being proportional to the radiation intensity (or gain in that dire
Well I didnt get what you meant by 3 angles The systems I know are either cylindrical co-ordinate systems and is defined by(ρ,φ,z). OR Spherical systems (r,θ,Φ). I suppose you need the Spherical cor-ordinate system conversions x= r * sinθ * cosφ y= r * sinθ * sinφ z= r * (...)
Sush, The techniques mentioned by amrstaha will work, with the following caution: ~ The output of the precision rectifier/filter combination will be equal to the average value if an active precision rectifier circuit is used. You then multiply the average value by PI /(Sqrt(2) X 2) (approximately 1.11) to get the RMS value. ~ If the wavefo
Dear all I need the result of this formula ∑(p-i)cos(iθ) , p is a constant, i is the index run from 1 to (p-1)
epilot, Adding to comments by Mansour_M: Measure the phase shift between the voltage and the current. Let Za = the value as obtained by Mansour_Ms method. Let theta = the phase shift. Then Z = Za cos(theta) + jZa Sin(theta). Regards, Kral
jitesh lulla, For a purely capacitive or purely inductive load, the power factor is zero. For a purely resistive load, the power factor is 1. For complex loads, and sinusoidal source voltage, calculate the phase shift using theta = |Tan-1(X/R)| where X is the reactance (capacitive or inductive) and R is the resistance, Tan-1 is the arctangent fu
because the when demdulator, for example the syn demodulator, the phase noise shall turn to the Amplitude, this is called the PM/AM of the demodulator, y can from the formuation cos(wt+theta)*cos(wt+phase_noise) to see this effect
AlexBaraba, I'm assuming that 1. the accelerometers are mounted to the robot, and not a stabilized platform. . 2 You want to calculate the robot position with respect to the earth. If this is the case, then you must calculate the direction of the robot after each iteration. Assume that the robot is initially pointed East, and we assume the in
Can anyone tell me jamming technology about PBNJ(partial band noise jamming) and BMTJ(band multi-tone jamming)?principle or simulation methods under slow frequency hopping system, plz...... Added after 2 hours 44 minutes: the following is some of my program about PBNJ, but how to simulatio BM
pasting from wikipedia ... (I have not done the coding ) function gb=gabor_fn(sigma_x,sigma_y,theta,lambda,psi,gamma) sz_x=fix(6*sigma_x); if mod(sz_x,2)==0, sz_x=sz_x+1;end sz_y=fix(6*sigma_y); if mod(sz_y,2)==0, sz_y=sz_y+1;end =meshgrid(-fix(sz_x/2):fix(sz_x/2),fix(-sz_y/2):fix(sz_y/2)); % Rotation (...)
The excerpt from Pressman was too small for me to read, but I believe its says that the power factor is equal to cos(theta) where theta is the phase shift between the voltage and current. This is indeed true for sinusoidal waveforms. In a power supply, the uncorrected current waveform is seldom a sinusoid, so the purpose (...)
Hi This code Phi=0:pi/10:2*pi; theta=-pi/2:pi/10:pi; =meshgrid(Phi,theta); r0=0.5; R=sin(PHI).*cos(theta)+r0; % for example =sph2cart(theta,PHI,R); %get cartesian values mesh(X,Y,Z); %display Or surf(X,Y,Z) % colored faces produces this plot images.e
jmreina, Yes, increasing the PF of an individual load will increase the PF of the whole system. You can demonstrate this by adding up the in-phase current components (I cos theta) and then adding up the 90 deg components (I sin theta). Then draw a vector diagram of the 2 components. You will see that the phase shift of (...)
This will make final equation shorter cos(180-x) = - cos x
I need help with some matlab code. I have a five hertzian z-directed dipole which is aligned along the z-axis with their centers spaced a distance d apart. I need to plot of a normalized E-field pattern as a function of theta for a distance of lambda/2. I am confused on how to approach this. the e-field equation is as follows: e=i*omega*mu
Yes Matlab is the best tool for simulating antenna arrays; Below i have typed some MATLAB code to simulate liner antenna array. change the different variable and see the results. %******************************** clc clear all f=2000; c=340; d=.08; N=10; theta= 45 * (pi/180); si=0:pi/100:pi; for k=1:101 (...)
Janelda, You cn get the input impedance of the meter from the manufacturer's specification. Use the impedance rating at the full scale range at which the meter will be used. If this information is not available, you can apply the mains voltage to the meter through an external ammeter. Then the input impedance is given by R = V/I. I'm asuming t
Hi All, i have a project for finding the amplitude and distances of an 7-elements array with a 20 dB side lobe level. i have the basic code in matlab and i need to determine the assignment of antenna. i choose 3GHz as the work frequency and i use the momentem method. function ff1=patterns(lambda) % Mr: number of MBFs per antenna a=0.0
Here's one of my posts from this thread: Are you using design compiler? If so check out...
Hello everyone, I would like to know if there's a software/matlab code I could use in order to convert the pattern of an antenna element to a formula that can be plotted in Matlab. For example : % element pattern of dipole antenna g(theta) = (...)
when u multiply rms values it is actually the apparent power which is the vector-sum of real and reactive powers. real power=Vrms*Irms*cos(theta) reactive power=Vrms*Irms*sin(theta)
Hello, I am having a major issue with the far field excitation source file formatting. I cannot seem to generate a simple cos^q(theta) pattern file and need to get support from CST for this to see if they can supply someone with a cos^q(theta) pattern file. So, does anyone have (...)
Hello, I am simulating a reflectarray antenna in CST. I am feeding the reflectarray with a cos^q(theta) model feed pattern far field source using the I-solver. Problem is when i get the results for the far field, i get an error at the end of the solver run that says the radiated power is greater than the excitation power (accepted power), (...)
dear acrislg thanks for your reply I try this code but unfortunately obtain this plot: Phi=(0:1:180)*2*pi/180; theta=(0:1:180)*2*pi/180; =meshgrid(theta,Phi); R=sqrt(1-(sin(theta)^2.*sin(PHI)^2)).*(sin(pi.*cos(theta))); (...)
Hi everyone, I am new to this forum, and to image processing as well. I am working on the Gabor filter, and have read previous threads on the same from this forum as well. My problem is a bit unique though, while I tried implementing my 2D Gabor according to sources on the internet, the results are not exactly the same for the filtered image, and
Hello, I want to input two orthogonal polarization division multiplexed channels for optical communication. The desired modulation format of the channels is QPSK. I have generated that with pskmod command. Then I took a random value for theta and multiplied the two channels with the unitary matrix once. Something like this: = [cos(th
1/120*pi^2 integration 0 to pie [(sin(1.2420*10^7)*costheta)/cos^2 J0(k0L sin θ)sin3 dthetaI can't get the above at all. Write correctly with using (), and *. What is "k0L" ?
hello, i want to design the movement of ac motor using forward park transform. i must design it using the verilog code. the problem now, i dont know how to start design the ac motor using that equation of park transform and do it in verilog code. i must create the input and output for 16 bits. this is the equation forward park transformati
how i can plot an azimuth and elevation planes for E= sin(theta).*cos(phi) or E= cos(theta).*cos(phi) or E= sin(theta).*sin(phi) etc {matlab code } ??
I'm trying to simulate a folded dipole using MMANA-GAL, which is a method of moments package based on NEC2. The diameter of the dipole is 12 mm, the radius of curvature 35 mm, so the two arms of the dipole are spaced by 70 mm. How should I represent the ends? Clearly the method can't use a curve, so I wrote a C program which worked out the coord
Hello I have a project to simulate radiation pattern of circular loop antenna. I have D=fn(theta,phi), and I do transform from theta,phi to x,y,z by these equations: x=D.*sin(theta).*cos(phi) y=D.*sin(theta).*sin(phi) z=D.*cos(theta) (...)
I using Raymond Thai's Thesis to do Image orientation but some how i m not getting the desired output. Can someone tell me if there is an error in the following code I=double(N); %loading the normalised image dx = blockproc(I,,@sample2); %sobel x-gradient dy = blockproc(I,,@sample3); %sobel y-gradient imview(I,); imview(
simple imaginary to polar co ordinates a+jb=(sqrt(a^2+b^2))phase(b/a) tan(theta)=b/a, a=r*cos(theta), b= r*sin(theta) Hope that helps Regards Elchiquito
The power factor (cos(theta) where theta is the angle between the voltage and the load current)
cn we able 2 find out the directivity in 2d plot of half wave dipole,....i got 8 shaped radiation pattern hw 2 obseve its directivity?? i hve given theta range from 0:pi*0.01:2*pi,.and electric field formula e=(cos((pi/2)*cos(theta)))/sin(theta) ,.i am doing in matlab
Hi, I'm trying to generate waves of the form, p = a*cos(theta)*exp(i*w*t), where t is the time, w is the frequency and theta is just an angle. In my VI (attached), I used exp(i*w*t) = cos(w*t)+i*sin(w*t) and formed this using the Re/Im to Complex Function. And I used four different (...)
You havnt calculated your power facctor? cos(theta)
........ Is it possible to separate this function in a+ib form. Either through MATLAB or manually. M = sqrt(sqrt((16+2.23*sin(x)^2)^2 + 0.6^2)) ; theta = atan2( 0.6 , -(16+2.23*sin(x)^2))/2 ; a = M*cos(theta) b = M*sin(theta)
I changed the progressive phase excitation angle (beta) to 45 degrees on my dipole array, and I got huge gain (better than the endfire 32-degree phase at 0-degree scan angle). I am not sure what the 45-degree phase excitation angle corresponds to in scan angle (theta) as when I plug it in the equation beta = -kd cos(theta), (...)
Hello everyone, I have written a matlab code for BPSK modulation. Here in the program, I have first generated random binary bits. Modulated the bits with BPSK modulation. Added noise to the bpsk modulated signal. My matlab code is as follows: clc; close all; clear all; no_of_bits=10; no_of_samples=10; threshold = 0.5; A = rand(1,no_of_b
Hi TomJohn, Inphase and Quadrature components of a passband signal, s(t)=A*cos is I(t)+jQ(t)=A*cos(theta(t))+j*A*sin(theta(t)) as s(t)=I(t)cos(2*pi*fc*t)-Q(t)sin(2*pi*fc*t).
I am needing a 14 mil spacer to be placed under a thru-hole part. As this is a low volume product I was thinking of trying to create a spacer using a SMT pad and solder paste with no part on it during heating. Once the paste melts it should create a dome. My question is how to calculate the size of pad needed to create a 14 mil spacer? Is it ev
Dear friends, I am trying to draw three ellipsis separated by 120 degree as in the below picture by matlab in the same graph but i stuck how to complete my code, i started with one ellipse as below please help 87184 xCenter = 12.5; yCenter = 10; xRadius = 2.5; yRadius = 8; theta = 0 : 0.01 : 2*pi; x
88856 Hello,every one I am trying to plot radiation intensity of antenna using the following code but it is giving me an error. please, help me PI = 4.0*atan(1.0); E = 120.0*PI; L=1; Io = 1; r=2; k=2*pi; theta=0:1:359; (...)
I have seen different books claimed J_0(x)=\frac{1}{2\pi}\int_0^{2\pi}e^{jx\sin\theta}d\theta=\frac{1}{\pi}\int_0^{\pi} e^{jx\sin\theta}d\theta=\frac{2}{\pi}\int_0^{\frac{\pi}{2}}e^{jx\sin\theta}d\theta. I have issue with this. Here is my reasoning: \int \ sin^{m}(\theta) (...)