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Recent content by sibbi77

  1. S

    8051 & C++ in Linux

    pay especially attention to: concerning SFR usage. Sebastian
  2. S

    8051 & C++ in Linux

    Hi, the stock gcc is not able to generate code for 8051 cores. You can use the SDCC for this. An MCU does not need to be compatible to c++, it must be the compiler that must be able to generate code for the target. Because of the small memory of MCUs one normally does not use C++ features...
  3. S

    Low cost digitizer -- sound card? 2 channel possible?

    Refer to **broken link removed** Thomas Baier DG8SAQ uses the sound card for the same purpose.
  4. S

    Byte definition and bit definition in MATLAB

    use uint8()
  5. S

    radiation pattern with dB scale

    I said it (and numerous others...). If you do a radiation pattern plot in dB, you will get negative (dB-)values and polar() cannot plot negative values. Rescaling is only a solution in rare cases. By the way: the scaling has nothing to do with the argument of the log-function and the argument...
  6. S

    radiation pattern with dB scale

    you cannot use the polar function with dB-values. Check matlabcentral for a replacement.
  7. S

    Slot antenna Ground Plane problem in HFSS

    Your ground plane dimensions are comparable to wave length, thus the simulation result is expected.
  8. S

    Antenna Design softwares

    NEC and derivatives
  9. S

    omni-directional waveguide horn

    A complete construction guide is given here: **broken link removed** the reference is available in german only: **broken link removed**
  10. S

    HFSS and open wire lines?

    If the feeding needs to be inside of the computational area, use a lumped port for excitation.
  11. S

    exporting S-parameters from HFSS to ADS?

    Dear sv1437, the method is only (approximately) correct, if the characteristic line impedance of all the ports is (approximately) 50 Ohms (e.g. microstrip QTEM lines). Refer to renormalized S-parameters in the HFSS help or the book "Microwave Engineering" from D. Pozar Sebastian
  12. S

    a problem:can't run hfss v12

    Log into your Ansoft HFSS support account and ask them. www1.ansys.com/customer/default.asp Sebastian
  13. S

    exporting S-parameters from HFSS to ADS?

    Sorry sv1437, but both methods are entirely wrong. Use HFSS/Results/Solution Data/Matrix Data/Export Matrix Data and let HFSS renormalize the data. This is important, because the touchstone format has a fixed normalization impedance whereas the simulation correctly predicts a changing reference...

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