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Recent content by chaitu_b99

  1. C

    [SOLVED] frequency bandwith is 10%?

    A return loss of 10 dB is considered acceptable for many applications. Specifying bandwidth where the return loss was 3 dB would generally not be a good idea, as such a return loss is unacceptable for most applications. Conversely, specifying bandwidth as the 30 dB return loss value would...
  2. C

    wave propagation in wave guide

    Hi, Yes it is correct, but he waves should be with the different phase in order to avoid interference....
  3. C

    resonant frequency and bandwith

    Hi, Why we calculate the bandwidth and resonant frequency below the -10dB range in the S11 parameter chart.
  4. C

    comparison of material sizes

    Hi, Why all the material dimensions are measured with respect to wavelength. Wat is the need of measuring with wavelength.
  5. C

    wave propagation in wave guide

    Hi, Is it necessary tat to excite all the waves at the same time, the waves can be out of phase rite. Is there will be any interference in the waves if they are excited at different times.Please explain.
  6. C

    wave propagation in wave guide

    Hi, I know tat infinite number if modes can be traveled in a wave guide . Wat abt the number of waves, is it tat only one wave can travel in a wave guide with different modes ???
  7. C

    wave propagation in wave guide

    Hi, Can anyone please tell me, how many waves can be propagated in a wave guide.
  8. C

    Ground effect in an antenna

    Hi, If the antenna is placed above the actual ground(earth). How the actual ground can act, as the antenna is grounded already to ground under its substrate in microstrip antennas.
  9. C

    wav guide modes of propagation

    Hi, Can more than one mode can be traveled in a wave guide ???
  10. C

    Unable to generate MESH in CST MWS

    you can try by increasing number of cells...just try this......!!!
  11. C

    ph.d topic suggestion

    Hi, Can anyone please help me suggesting a Ph.d topic in RF & Microwave antennas. ---------- Post added at 07:14 ---------- Previous post was at 07:11 ---------- Please suggest me in simulation type topics, I worked with CST tool in the past.
  12. C

    Difference between "radio frequency alternating current" and " radio waves "

    Re: Difference between "radio frequency alternating current" and " radio waves " Then what about a wave that propagates in wave guide.....is the alternating current is taken as a reference to the wave....or they both are same ???????
  13. C

    Microwave antenna comparison

    Actually CPW is efficient type of feed ,since the fabrication difficult is less than the microstip feed and also if you want to integrate the active componets to your antenna it is difficult with the microstrip. So the CPW is efficient.
  14. C

    Microstrip patch antenna. Need help

    You can increase the height to some extent...beyond one point the standing wave will appear, which will result in the decrease in the efficiency.
  15. C

    Microstrip patch antenna. Need help

    Hello, Go through the book "Antenna Theory by Balanis", you can good idea of the radiation efficiency wrt height of substrate.
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