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Recent content by monterra

  1. M

    How to simulate a power combiner???? URGENT

    Hi, please see the enclosed. you may find in the results section that S31 and S21 are -3Db each. together the power is combined.
  2. M

    need help with hfss optimetrics

    Hi, yes you can. first,you should define within your design parameters like length, position etc.. then in the optimetric you should define the range of these parameters, and analyze. there are too many steps to write it down, please rfere the tutorial examples for oprimetics, and i am sure you...
  3. M

    Netwoek analyzer: Isolation

    Hi, when doing on chip measurements, the two ports may be very close to each other. the isolation is to eliminate the coupling between the two port. just place the two ports with the distance the device under test should be measured, and preform the isolation test.
  4. M

    Where to work in: RF MEMS or RF IC?

    Re: RF MEMS vs RF IC Hi, about advantage and disadvantage between them: they are two different area, so you can't compare between them. most of the RF MEMS subjects refers to passive devices, while most of RFIC is active devices. about future vision, in my opinion any radio device should...
  5. M

    Which HFSS boundary is closer to reality?

    Re: HFSS Boundry? Hi, it is depends in the purpose of the boundry. for an example, if you are looking for radiation pattern of antenna, use the radiation boundry. They are two different boundaries.
  6. M

    Why does the inductance decrease in lower frequencies ?

    Re: inductance question Hi, i saw this phenomena many times before, it is not a mistake. my guess was that the inductance is decreasing as a result of the skin effect. and after it increases because of the parallel capacitance of the net inductor model.
  7. M

    Question about planar inductor design

    design planar inductor Hi, i don,t think it is difficult doing it with HFSS. alternatives are: ADS momentum. Ansoft designer.
  8. M

    a question about HFSS!

    Hi, you may use a PML as a power absorber for matching, while radiation will produce reflaction as mentioned.
  9. M

    about HFSS simulation result!!

    Hi, When the number of passes increase it doesnt meen that the solution is going to be converged, sometimes it goes to the opposite way. you may adapt hamidmoghaddas suggest,increase the number of passes. dont warry about the convergence process, look just for the converged (last adaptive)...
  10. M

    HFSS MS sims with thin traces/ground on lossy substrates?

    Re: HFSS MS sims with thin traces/ground on lossy substrates Hi, could you please attach the hfss file so i can see what the problem is?
  11. M

    Symmetric Spiral Inductor in HFSS problem

    Hi, It's depending on the configuration you want to use the spiral (single ended or differential). By connecting it with differential excitation you may use only one port between the spiral terminals. by connecting it with a single ended excitation you need to define the ground reference...
  12. M

    the best book in antenna

    what is the best book on antennas Hi my favorite is "Antenna theory analysis and design" third edition of CONSTANTINE A. BALANIS. Eli

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