Search Engine **www.edaboard.com**

70 Threads found on edaboard.com: **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,

Mathematics and Physics :: 28.12.2005 10:25 :: tantoun2004 :: Replies: **7** :: Views: **17259**

hi,
how to write a program forcalculating **cos** angle(**cos** **theta**) in 8051
assembly language
thank you

Miscellaneous Engineering :: 03.04.2008 07:08 :: achuthkumar :: Replies: **0** :: Views: **630**

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

PLD, SPLD, GAL, CPLD, FPGA Design :: 18.02.2010 10:54 :: RBB :: Replies: **10** :: Views: **4546**

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

RF, Microwave, Antennas and Optics :: 19.10.2011 16:59 :: panou :: Replies: **0** :: Views: **643**

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) = (...)

Mathematics and Physics :: 18.06.2013 06:53 :: albbg :: Replies: **13** :: Views: **729**

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

RF, Microwave, Antennas and Optics :: 08.04.2005 06:14 :: adel_48 :: Replies: **3** :: Views: **7487**

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 * **cos**φ
y= r * sinθ * sinφ
z= r * (...)

Mathematics and Physics :: 08.04.2005 09:44 :: Ahmed Ragab :: Replies: **3** :: Views: **853**

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

Analog Circuit Design :: 29.08.2005 18:22 :: Kral :: Replies: **3** :: Views: **674**

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)

Mathematics and Physics :: 16.05.2006 19:07 :: Roshdy :: Replies: **2** :: Views: **541**

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

Electronic Elementary Questions :: 23.01.2007 10:19 :: Kral :: Replies: **2** :: Views: **879**

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

Analog Circuit Design :: 12.09.2007 17:04 :: Kral :: Replies: **1** :: Views: **2282**

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

RF, Microwave, Antennas and Optics :: 16.11.2007 23:36 :: springf2000 :: Replies: **5** :: Views: **915**

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

Mathematics and Physics :: 06.04.2008 14:53 :: Kral :: Replies: **9** :: Views: **1950**

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

Digital communication :: 03.09.2008 07:21 :: mydear2007 :: Replies: **0** :: Views: **506**

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 (...)

Digital Signal Processing :: 07.11.2008 04:45 :: mathuranathan :: Replies: **1** :: Views: **13978**

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 (...)

Analog Circuit Design :: 08.11.2008 13:58 :: Kral :: Replies: **9** :: Views: **982**

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

Software Problems, Hints and Reviews :: 02.02.2009 12:44 :: ksksreelak :: Replies: **6** :: Views: **2123**

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 (...)

Electronic Elementary Questions :: 03.02.2009 10:23 :: Kral :: Replies: **8** :: Views: **5228**

This will make final equation shorter
**cos**(180-x) = - **cos** x

Mathematics and Physics :: 05.04.2009 19:30 :: elektryk :: Replies: **3** :: Views: **2991**

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

EDA Jobs :: 28.04.2009 19:50 :: asmtk4 :: Replies: **0** :: Views: **1815**

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 (...)

Electromagnetic Design and Simulation :: 26.07.2009 00:26 :: engr_najam :: Replies: **6** :: Views: **1887**

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

Electronic Elementary Questions :: 19.07.2009 14:14 :: Kral :: Replies: **10** :: Views: **1615**

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

RF, Microwave, Antennas and Optics :: 24.11.2009 14:17 :: khaldoon99 :: Replies: **0** :: Views: **692**

Here's one of my posts from this thread:
Are you using design compiler? If so check out...

Digital Signal Processing :: 03.03.2010 21:28 :: RBB :: Replies: **6** :: Views: **1403**

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**) = (...)

Electromagnetic Design and Simulation :: 07.03.2010 11:03 :: narfcois :: Replies: **0** :: Views: **1415**

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**)

Microcontrollers :: 23.06.2011 01:54 :: enamshah :: Replies: **2** :: Views: **992**

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 (...)

Electromagnetic Design and Simulation :: 26.03.2010 17:02 :: hookups1534 :: Replies: **0** :: Views: **744**

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), (...)

Electromagnetic Design and Simulation :: 31.03.2010 21:46 :: hookups1534 :: Replies: **2** :: Views: **1602**

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**))); (...)

Electromagnetic Design and Simulation :: 04.06.2010 14:30 :: project.email :: Replies: **2** :: Views: **2005**

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

Digital Signal Processing :: 28.05.2010 04:43 :: darelet :: Replies: **0** :: Views: **564**

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

Digital communication :: 25.07.2010 14:09 :: S_O_A :: Replies: **0** :: Views: **509**

1/120*pi^2 integration 0 to pie [(sin(1.2420*10^7)***cos****theta**)/**cos**^2
J0(k0L sin θ)sin3 d**theta**I can't get the above at all.
Write correctly with using (), and *.
What is "k0L" ?

RF, Microwave, Antennas and Optics :: 02.10.2010 13:07 :: pancho_hideboo :: Replies: **6** :: Views: **2200**

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

Microcontrollers :: 07.03.2011 21:36 :: petunjuk :: Replies: **0** :: Views: **396**

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 } ??

RF, Microwave, Antennas and Optics :: 27.10.2011 17:18 :: barcawi23 :: Replies: **0** :: Views: **285**

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

Electromagnetic Design and Simulation :: 10.11.2011 18:58 :: drkirkby :: Replies: **0** :: Views: **483**

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**) (...)

Electromagnetic Design and Simulation :: 27.11.2011 14:24 :: engcu90 :: Replies: **1** :: Views: **2690**

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(

Digital Signal Processing :: 01.02.2012 10:54 :: Nikhilpanicker :: Replies: **0** :: Views: **322**

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

RF, Microwave, Antennas and Optics :: 24.02.2012 09:43 :: elchiquito :: Replies: **15** :: Views: **1197**

The power factor (**cos**(**theta**) where **theta** is the angle between the voltage and the load current)

Electromagnetic Design and Simulation :: 27.02.2012 07:01 :: klystron :: Replies: **3** :: Views: **644**

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

Electromagnetic Design and Simulation :: 06.03.2012 12:25 :: rosey :: Replies: **1** :: Views: **965**

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 (...)

Microcontrollers :: 19.06.2012 16:01 :: abr_pr90 :: Replies: **0** :: Views: **220**

You havnt calculated your power facctor? **cos**(**theta**)

Electronic Elementary Questions :: 03.07.2012 22:14 :: james05 :: Replies: **1** :: Views: **409**

........
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**)

Mathematics and Physics :: 12.07.2012 17:06 :: _Eduardo_ :: Replies: **4** :: Views: **790**

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**), (...)

RF, Microwave, Antennas and Optics :: 18.07.2012 13:42 :: kae_jolie :: Replies: **0** :: Views: **277**

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

Digital communication :: 23.08.2012 01:03 :: Shruti01 :: Replies: **1** :: Views: **368**

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).

Digital Signal Processing :: 10.11.2012 07:01 :: MHanif :: Replies: **1** :: Views: **251**

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

Other Design :: 07.02.2013 10:45 :: phaas :: Replies: **3** :: Views: **553**

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

Digital Signal Processing :: 21.02.2013 09:08 :: ayham87 :: Replies: **8** :: Views: **401**

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; (...)

RF, Microwave, Antennas and Optics :: 04.04.2013 17:23 :: kakar133 :: Replies: **10** :: Views: **371**

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**) (...)

Mathematics and Physics :: 17.07.2013 21:22 :: Alan0354 :: Replies: **1** :: Views: **367**

Last searching phrases:

orcad library files | tft controller | power layer stackup | sta materials | at89c2051 clock | qpsk cdma | servo motor circuit | triangle sierpinski | serial 16f84a | solar battery charger

orcad library files | tft controller | power layer stackup | sta materials | at89c2051 clock | qpsk cdma | servo motor circuit | triangle sierpinski | serial 16f84a | solar battery charger