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Recent content by hamid_iran

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    question on Green's functions

    Dear Demonis, Well, it is due to the B.C.'s on the interface. As you know, anχ[H1-H2]=Js on the interface, where, Js is the surface current on x-direction, an is the unit vector normal to the interface in z-direction, and χ means cross product. Therefore, the discontinuity would be on the...
  2. H

    question on field measurment!

    To my understanding, you guys implying that, there is no way of setting up our own measurement system, and have to stick to some commercial equipment! Come on, we should be able to do better than that! Still, waiting for help.
  3. H

    question on field measurment!

    I need to measure the mobile antennas field strength both indoor and outdoor.
  4. H

    question on field measurment!

    hamid_iran How could we measure the electromagnetic field strength indoor and outdoor?
  5. H

    Help requsted for secret code of LG 28" TV

    All these experts and nobody can help me! Maybe my request wasn't clear enouph. All I need is the secret code or service manual for this TV. Thanks for your help in advance.
  6. H

    help !!! increase the bandwith of mirostrip antenna

    Unfortunately, due to my very slow connection and download/upload speed of about 5kb/s, and also frequent disconnection problem, I am not able to send the copy of the book to an email address. Sorry, I hope in the future situation will get better, and I'll be able to answer the requests of my...
  7. H

    Help requsted for secret code of LG 28" TV

    secret code for lg tv Hi everybody. The picture of my 28" LG TV (CT29Q90IP) has got wider so that I can not see parts of picture on sides. I have already tried the zoom function on remote controle but the picture is too wide and I can not zoom it enough. Sombody told me that I have to use the...
  8. H

    help !!! increase the bandwith of mirostrip antenna

    I have already sent the file to your email account. you need winrar 3.3 to unrar the file. Let me know if still there is a problem .
  9. H

    question on Green's functions

    Dear Demonis, As I have already mentioned, you can derive the Green's functions yourself! The Green's Function derivation is not dependent on the radiating object but on the structure consisting of ground planes and dielectric layers. Therefore, the Green's Function for dipole antenna or any...
  10. H

    help !!! increase the bandwith of mirostrip antenna

    The file is ok. Would you please tell me what kind of error. Anyway, today I am online till noon. If the problem is still there let me know. I will mail it to your email account.
  11. H

    help !!! increase the bandwith of mirostrip antenna

    Here is the book "Broadband Microstrip Antennas" by Girish Kumar Kumar and K. P. Ray, 2003 ARTECH HOUSE, INC. I hope it would help.
  12. H

    help !!! increase the bandwith of mirostrip antenna

    I agree with secondalinea the "Broadband Microstrip Antennas by Kumar, ray " would be very usefull for you. If you havn't got it yet, let me know to upload it for you.
  13. H

    question on Green's functions

    Derive the Green's functions yourself! Just consider a current elemet on the surface where your printed antenna will resied, write the general form of the fields in substrate layer and upper and lower half spaces. And, finally applay the appropiate boundary conditions on the interfaces as well...
  14. H

    feed method for antenna

    This is a very general question and requires several pages of answers! Please, answer the following questios so that I may be of a little help. • What kind of antennas you are working with? Is it plannar? • What kind of application do you have in mind? Maybe it would help if you first consult...
  15. H

    What is ment by the magnetic current

    As you know the term δB/δt in Ampere's law is named as the electric displacement current. In view of the symmetry of the Maxwell's equations the term δB/δt is named magnetic displacement current. Also, the impressed magnetic and electric currents are viewd as the sources of magnetic and...

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