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  1. L

    LC Filters and connectors

    Hi, Just a simple question about RF filters and particularly a LC filter. How can we connect this filter (see picture) to an RF amplification chain ? Does it need a particular connector or does this filter is made for a use on a RF printed board ? Many Thanks Littlindian
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    Electrical properties of PVC at microwave frequencies

    microwave dielectric properties of pvc Hi, Does anybody knows where can be found a complete description of electrical properties of PVC (PolyVinyl Chloride) at microwave frequencies ? I need, at least, dielectric permittivty and electrical conductivity at f=1GHz, 3GHz and 5GHz. Thanks a lot...
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    Not so simple (?) : Te10 mode in Horn waveguide antenna.

    te10 magnetic field distribution You'r right, thank you for answering me :-) But the trick is to know if it is really a TE10 mode when the E-field is polarized as plotted in the following picture (simulation HFSS). It seems to be correct but what is the consequence of such a design of...
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    Not so simple (?) : Te10 mode in Horn waveguide antenna.

    microwave mode te10 I can add that I have tried to simulate it but ... CST Microwave Studio does not allow to set the direction of the excitation field... It automatically sets the E-field following the larger dimension of the guide. Littlindian...
  5. L

    Not so simple (?) : Te10 mode in Horn waveguide antenna.

    field component of te10-mode Hi, The TE10 mode in a rectangular waveguide has longitudinal components of magnetic field It means that the port excitation sets the E-field component which is perpendicular to the larger side of the guide. What happens if the guide is excited following the...
  6. L

    Zeland Fidelity : post-processing issue (.fdfield file) !

    Re: Zeland Fidelity : post-processing issue (.fdfield file) Yes ! I'm relieved. My interpretation of the fdfield was correct :-) Well, It's a good new because I had already write matlab "code" for extracting those components and made some post-treatments. The button "helped me" has never been...
  7. L

    Zeland Fidelity : post-processing issue (.fdfield file) !

    Re: Zeland Fidelity : post-processing issue (.fdfield file) I trust you if you say that this action may be quite-hard (long & bulky) to implement... If you propose this action, this is because the fdfield file is not abble to give me the needed informations... ... despite the fact that a...
  8. L

    Zeland Fidelity : post-processing issue (.fdfield file) !

    Re: Zeland Fidelity : post-processing issue (.fdfield file) I'm looking for extracting Ex, Ey and Ez fields in the frequency domain (f-domain near field). For a given frequency, I need to extract those components on a given volume facing the antenna. Does Zeland Fidelity allows this...
  9. L

    Zeland Fidelity : post-processing issue (.fdfield file) !

    Re: Zeland Fidelity : post-processing issue (.fdfield file) Those data may be useful for me… For my specific application I’d like to get, for each voxels (1x1x1 mm^3), the simulated values of each component of E and H fields on a media facing the antenna… Fidelity is pehraps not the...
  10. L

    Zeland Fidelity : post-processing issue (.fdfield file) !

    Re: Zeland Fidelity : post-processing issue (.fdfield file) I've some pb with the post-processing of Zeland Fidelity ! Does anybody know how is organized the file .fdfield ? three first columns = position (for personnal post-treatment, it is better with a uniform mesh) fourth and fifth columns...
  11. L

    What is the definition of EIRP?

    Re: What is EIRP??? The Effective Isotropic Radiated Power (EIRP) of a transmitter is the power that the transmitter appears to have if the transmitter were an isotropic radiator (if the antenna radiated equally in all directions).  By virtue of the gain of a radio antenna (or dish), a beam is...
  12. L

    Explanation and references about the RFID

    Re: What is the RFID? Let me recommend the following book : "RFID Handbook: Fundamentals and Applications in Contactless Smart Cards and Identification" by Klaus Finkenzeller. (hxxp://) Antenna topologies and frequency bands are presented. Some indutrial RFID main actors are Texas Instrument...
  13. L

    Looking for info about GRASP 9

    I'd like to get some informations about grasp9 from ticra. Does anybody use it and could give some tips about its capabilitites and drawbacks for example... Does an evaluation version (student version?) can be downloaded anywhere? Thanks !
  14. L

    Help me with designing a 3x3 cm antenna

    Re: 3cm^2 antenna? The frequency is absloutely esaantial !! Then the application aimed is also a major element in the design of an antenna. (radiation pattern omni-directional or not, bandwith expected)...
  15. L

    INSERT SLOTS ON THE GROUND PLANE USING ADS

    Just some comments: Slots in the ground plane of microstrip devices is well known as an EBG structure (Radisic EBG structure). It can be used for reducing radiating element size if well designed. Slow-wave effect in the EBG structure pass-band can be used for such applications. For slot line...
  16. L

    indoor propagation : antenna diversity

    Please, let's talk about antenna diversity. Indoor proapation = multipath propagation = fading. when one antenna faces fading, the other one recieve certainly a better signal. ok but what are the different selection criteria for feeding the first or second antenna ? Before/after demodulation ...
  17. L

    Looking for good reference about EBG filters

    Re: EBG filters EBG structures are "old news" : it's true. The attention have been focalized on it and quite new structures have been proposed but theoretical interpretation of EBG behavior are not recent. Actually, analysis tools have already and completely been proposed in the past : For...
  18. L

    Please help me -the problem of HFSS

    HFSS v9.1 REPORT ERROR I also met an issue with v9.1. The fast sweep can't work on my computer. I'll obliged to 'Interpolate' and save fields with the 'discrete' option... Moreover, as for me, the simulator is still quite instable. The function "duplicate" is especially 'windows'-able and bugs...
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    Looking for good reference about EBG filters

    Re: EBG filters just delete blank spaces in those references and www. instead of www- i. Have a look on this link about an EBG conference in France at IETR. Some oral presentations are available there. **broken link removed** ii. My vision on EBG structures As for me, we can separate EBG...
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    PIN model in HFSS? when simulation a microstrip switch

    As for me, HFSS is not the best tool for simulating such a switch made with pin diodes. As, for me, i would use Ie3d from Zeland. Actually, in the module "modua", you can cascade box of S-parameters. Method : 1. Measure S parameters of the diodes used. 2. Transform those parameters in a s2p...

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