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Recent content by aashishsharma

  1. A

    Excitaiton Signal in CST Time and fourier reprentation

    Hey I opened MWS new project without any template. Set units, background material etc. As soon as I define the freq of operation say 0.8 to 1.2 GHz a default excitation signal is generated? In its properties it says its gaussian with Fmin 0.8 Fmax 1.2 GHz. Again after running the simulations I...
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    What does 3D max value in CST mean?

    I ran some simulation and computed the E field value at 1GHz in CST MWS. I as I looked at the 3D plot it showed 3D max value 68.52 at -1 0 0 photo attached. I exported the the ASCII file for the plot data and got the value at -1 0 0 as follows ExRe EyRe EzRe...
  3. A

    CST MWS excitation source

    Hello I want to model wall and see the Electric field as EM wave travels through wall into free space. I created the model (attached). But I am unable to decide how to give an excitation source at a point marked. I tried discrete port as shown but E field doesn't appear to decay at the source...
  4. A

    CST bounding box size manipulation

    In CST I know that the simulation of the structure is performed within the bounding box of the structure. But size of the bounding box is not in my hand. For example. I created the 5x5x5 cm vaccum box in which I want to see how Gaussian excitation source will create the E field inside that...
  5. A

    3D FDTD using FDTD in CST(Computer Simulation Technology)

    Hey I am using CST for 3D FDTD simulation. I can do 2D and 1D in C or matlab code but with 3D code becomes complicated hence I want to shift to CST. I understand that CST microwave studio can do the job for me. I just want 5x5x5 m 3D space and take a gaussian source somewhere within this space...
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    Radar maths I and Q components

    Hey thanks for the replies. I understand the concept of complex no.s euler forms etc but i am stuck with this really simple thing(i know this is stupid). Refer to the Image of the page i posted. Cos part goes directly into adder while -sin part is phase shifted by 90 degrees. So -sin(2*pi*f*t +...
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    Radar maths I and Q components

    Hey I have just started work with radars. I read that incoming signal in case of Doppler radar is frequency shifted. On adding it to original signal we get doppler shift. But we dont do it directly. First we make I component ( by mixing incoming signal with LO signal) then Q signal by mixing...
  8. A

    Regarding research paper publishers

    Hey I wanted to know how to know details of paper published. I mean Name of the author are explicitly mentioned but other details? Also all I could get is IEEE is publisher right? Just like IET? Is it similar that book has an author and publisher( like wiley etc). just for example I saw a paper...
  9. A

    Proximity sensing using 3 IR LEDs

    Dont use the same thing exatctly. there is datasheet for the sensor that is mentioned in the link on the page i posted. Go the application notes for the same. You will find sensor interfaced with I2C. You may use any controller that supports the protocol
  10. A

    Proximity sensing using 3 IR LEDs

    Yes And you need to select sensor which you must be using. Vishay semiconducctor have development board for gesture recongnition you might wanna consult them. they are using VCNL4020. this will help **broken link removed**
  11. A

    Proximity sensing using 3 IR LEDs

    You need to compare the signals received from different emitters (3 in your case). Emitter IR light is reflected from object say hand then detected by proximity sensor. In order to differentiate between signals received from various emitters emitter are pulsed one after other. Read proximity...
  12. A

    how many Devices can we connect on I2c Bus

    7 bit addressing so 127 physical devices i think
  13. A

    DC Motor Exact Speed Control with 8051

    Speed of the motor is directly proportional to the voltage applied. Voltage applied is directly proportional to Pulse width. I think that might clear your doubt Thanks
  14. A

    saturn PCB calculator

    **broken link removed**
  15. A

    Real time serial data acquisition

    There may be lot of timings consideration involved as you must have seen uptil now sampling rate, uart timings etc. Its better to dump the data into the file and then read it. Even MATLAB can read com port easily and ten do whatever you have to do with the data. there are many tools like...
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