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  1. C

    Effect of metal resistivity on the characteristic impedance of microstrip line

    Hi We know that the characteristic impedance of a microstrip line is given as follows: In general the metal resistivity is so small that Z0 can be taken as sqrt(L/C). But if the metal resisitivity is not that small? Then according to the equation, this resistivity should affect the Z0. Is it...
  2. C

    2D graphene simulation problems

    Hi, Frequency1, I think the formula you used is wrong. It will give a complex permittivity, where did you find this equation? Did you enter complex permittivity in CST?
  3. C

    How to enter complex conductivity vs. frequency into CST

    Thanks for fast reply. I don't know how to convert to complex permittivity. Could you please help on this?
  4. C

    How to enter complex conductivity vs. frequency into CST

    Hi, Following the discussion here: https://www.edaboard.com/threads/223918/ I obtained complex conductivity vs. frequency data of graphene material. I'm using CST and I don't know how to enter complex conductivity values in CST. I searched a lot for several days and what I concluded that I can...
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    CST ports problem-please help

    Hi, I just designed a simple microstrip transmission line and modelled it in CST. I attached the CST project. According to the microstrip design, epsilon of the substrate is 4.6, substrate thickness is 1.6mm, and line width is 3mm. I verified these calculations in 2 different plugins. The...
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    Forming SAR radar image from measured data-urgent

    Hi all, I built the cantenna radar system of MIT (http://www.glcharvat.com/Dr._Gregory_L._Charvat_Projects/Cantenna_Radar.html). I also designed a simple data acquisition circuit to transfer the measured waveform to MATLAB environment. Finally, I could acquire SAR data by putting a metal bin in...
  7. C

    An applied RF system

    Thanks a lot.
  8. C

    An applied RF system

    Hi all, Please look at the attached block diagram first. I'm generating a sinusoidal RF wave using ZX95-2536C-S+ with a ramp function applied to tuning input. Hence a sinusoidal wave having a sweeping frequency is supposed to be generated. Then I split the generated wave using ZX10-2-42-S+...
  9. C

    Wireless USB data transfer

    Hi, I have a simple project where I read a sensor and send the data to the PC via USB using 18F2550. However, I'm planning to transfer the USB data wirelessly. Ideally I'll connect the "USB data transmitter module" to USB output of 18F2550 and then connect the "USB data receiver module" to my...
  10. C

    18F2550 programming error

    Thanks wp100, I'll try the desktop and will note here.
  11. C

    18F2550 programming error

    Thanks for your helpful answers. @wp100: I attached the screenshots of the configuration settings and the message I get after I erase and blank check the 2550. I didn't write the code, I just used the USB data reading example of Mikroelektronika. The configuration settings are written into the...
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    18F2550 programming error

    Thanks but the specific problem I reported in this post was about this K150 programmer and 18F2550. Of course there are dozens of programmers in the market including those you said. Do you have any suggestion about PICPRO software such as the fuse settings etc...?
  13. C

    18F2550 programming error

    Hi, I'm using a PIC programmer that I bought on ebay. It was advertised as K150 programmer but I realized that it's a clone. Listed as here: **broken link removed** Anyway, I'm using PICPRO software and I can successfully program 12F675 and 16F84A. However, when I try to program or erase...
  14. C

    flash data corruption

    Hi, Thanks. Yes, Windows CE and FFS is used. Regards,
  15. C

    flash data corruption

    Hi, I am working on an embedded hardware which has a pxa255 processor with AMD's AM29LV256M flash chip. The system acquires analog input, passes thru the ADC, after processing, stores the data in flash memory. However, sometimes the data is corrupted when writing to the memory. I checked the...
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    Candence Allegro 16.3

    I am newbie to Allegro and have a similar question: How can I connect two lines? I mean how can I add T junctions??? Thanks in advance. carbon9
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    Check my LED blinking program for PIC16F6888 MCU in Isis

    Hi, I am trying to simulate a PIC16F6888 MCU in Isis and it behaves strange. Just a LED blinking program but LEDs do not blink. MikroC and Isis files are attached. I need help please. Regards, carbon
  18. C

    Verilog-A genvar expression

    Hello, I'm trying to implement a voltage controlled capacitor in Verilog-A. I tried to use the following script: `include "disciplines.vams" `include "constants.vams" module capacitor(p,n); inout p,n; electrical p,n; analog begin if(V(p,n)>=0 && V(p,n)<2.5) I(p,n) <+...

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