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  1. M

    patch antenna design using hfss

    Hi manojram6789, Please find the HFSS v11 tutorial as requested, compare to the v10 it doesn't have too much difference though. Regarding the formula to calculate the patch dimension (rectangular, triangular or circular), you could find the mathematical formula almost in every antenna book...
  2. M

    Vector/scalar modes in IE3D simulation software

    Need Help in IE3D Hi All, OK, just to the point, based on reference the circular polarization is occurs due to combination of two mode of current with difference phase of 90 degree and equal amplitude. The question is can I see vividly in IE3D simulation software this two distinct mode of...
  3. M

    current phase different in IE3D

    Hi all, I'm designing a CP slot antenna, so it's important to get know the excitation current phase on the slot. I'm simulating it using IE3D, so can I get information about it (in graph) for example the phase different between the two slot. I hope someone could give me full explanation on it...
  4. M

    Question about slot antenna

    hi Lupin, thanks for the reply... I really appreciate if you could provide me the paper you mentioned... yes I use the ground plane the same layer as the slot... so as brief, the antenna has 3 layer: - top layer : ground plane and the slot - dielectric layer - bottom layer: microstrip line did...
  5. M

    Question about slot antenna

    explanation of slot antenna Hi jian, thanks you for your explanation, I'm glad you mention it. btw, I've simulated in IE3D for the slot antenna using finite ground plane, when I want to see the current distribution on it, why I can't see the magnetic one (only electric) contrary when I...
  6. M

    Question about slot antenna

    slot antenna finite ground plane Hi all, I'm sorry to ask... but I hope there's someone in this forum who have experience in designing slot antenna. OK, as mentioned, I'm trying to design the slot antenna which feed by microstrip line. The question are: - First for the feed line, from the...
  7. M

    truncated-corner square patch for CP

    Hi mwband, Thanks, I've downloaded it... after I read it, I get impression that first I have to figure out the Qo (quality factor) of the un-truncated patch. Is there anyway to figure it out (because in that book, to find out Q factor have to deal with magnetic calculation). Thanks
  8. M

    truncated-corner square patch for CP

    Hi, Is there anyone here that have dealed with truncated-corner square patch for circular polarization? If yes, I hope he/she would kindly help me: My question is (from known material parameters and original patch size and its resonant freq) how you can define the truncated size that will...
  9. M

    Help me with showing Axial Ratio vs. Frequency plot in IE3D

    Re: Axial Ratio in IE3D Hi shadow_khan, It's possible to optimize the Axial Ratio as the goal. What you have to do is: - first you enable the Radiation pattern calculation, then it will show you option for the Axial Ratio. Then you choose the Parameter Type to be Axial Ratio. - and set the...
  10. M

    [ask] Slot Antenna with CP

    Hi, Based on this paper, I think it's possible: Printed ring slot antenna for circular polarization Kin-Lu Wong Chien-Chin Huang Wen-Shan Chen Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung; Regards,
  11. M

    patch antenna calculation ?

    patch antenna theoretical calculation Hi kocha, I don't know much about suspended patch antenna exactly. But for basic patch antenna (rectangular, circular patch, even array and aperture also exist) you can use PCAAD5 to calculate the dimension of antenna for the wanted frequency, you just...
  12. M

    [req] Microwave Journal paper

    mwjournal circular polarized patch antenna design Hi, Can anyone help me to get this article: A Design Procedure for a Circular Polarized, Nearly Square Patch Antenna S.K. Lee, A. Sambell, E. Korolkiewicz, S.F. Loh, S.F. Ooi and Y. Qin Microwave Journal...
  13. M

    multiband vs wideband

    Hi jian, Yes you're right, we can tune the antenna to get VSWR < 2, for example by moving the probe feed postion. But, what I want to make sure is, it is normal for a simple microstrip patch antenna (without any additional methods) having more than one resonant frequencies? Please give me...
  14. M

    multiband vs wideband

    Hi jian, Thanks again for your time helping me... so in other word, it is common that a simple patch antenna could have more than one resonant frequencies (with RL < -10dB), because basically microstrip antenna has high Q factor. Is this correct? About good antenna criteria, thanks for your...
  15. M

    multiband vs wideband

    Hi jian, Thank you soo much for the explanation... so the red line that distinguish is the Q factor... we can use the same method (e.g. adding slot to basic patch), and it could generate multi-band or widen the bandwidth, depends how the slot change the energy (or can I say the current)...
  16. M

    multiband vs wideband

    Hi, Need your help about this matter... For microstrip antenna there is some techniques/methods to generate multi-frequency or enhance the bandwidth of the antenna... I see some of those techniques are relatively the same, for instance slot could be used to generate multifreq and also widen...
  17. M

    How to do optimization in IE3D?

    Re: Optimization in IE3D Thanks again Jian, but sorry one more question if you don't mind... If I want to optimize the frequencies... I mean by optimizing the variables and in the range of freq that I set before, I want to know the best frequencies that I can got which have the best antenna...
  18. M

    How to do optimization in IE3D?

    Re: Optimization in IE3D Hi Jian, Thanx for responding... Yes I know we must figure out the variable first, it already settled... the problem is, in the "Optimization Goal" what kind of parameter I should set? because there are more than one resonant freq. that I want to optimize? for...
  19. M

    How to do optimization in IE3D?

    Hi, Can anyone give me a hint for this matters... currently, I'm designing a multi-frequency patch antenna using IE3D... I've already got the frequencies, but not good enough... so I want to improve it using the "optimizations" tools in the IE3D... what parameters I should set for this...
  20. M

    How to add shorting pin in IE3D

    Hi balaguru thavamani, Thanks for your reply... Before, I done the shorting of patch antenna by using the "Conical via"... Is it the same (I mean in the results)? And for the diameter of shorting pin actually how much it is (which also used in practical)? Regards

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