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  1. #1
    durk
    Guest
    Hi, I probably make a fool of myself asking the following but I am
    really interested. In the old times it was easy to spot the antenna on
    a mobile (gsm) phone. I have now opened a Siemens C45 I no longer use
    and have no idea what the internal antenna is. Also I cannot find on
    the net diagrams of the circuitry where the antenna is shown.
    Does anyone have a link to a photography or diagram in which the
    location is clearly indicated? All help is appreciated.
    Best regards, Durk




    See More: where is internal antenna on Siemens C45




  2. #2
    Peter Parry
    Guest

    Re: where is internal antenna on Siemens C45

    On 21 Jun 2006 13:27:31 -0700, "durk" <[email protected]> wrote:

    >I have now opened a Siemens C45 I no longer use
    >and have no idea what the internal antenna is. Also I cannot find on
    >the net diagrams of the circuitry where the antenna is shown.
    >Does anyone have a link to a photography or diagram in which the
    >location is clearly indicated? All help is appreciated.


    It is always at the top of the phone (to get clear of your hand) and
    is usually a patch antenna - a metallised coating on a plastic
    moulding or, less often, a PCB antenna. They don't look much like a
    conventional antenna, for example look at
    http://www.accessoriesresources.com/...3573053302.jpg and
    http://www.accessoriesresources.com/...3592464956.jpg

    these are Nokia but the Siemens will probably be similar.


    --
    Peter Parry |Hemel Hempstead| tel +44 (0)1442 212855 |
    WPP Ltd |Herts, UK | fax +44 (0)7989 853112 |
    Antenna solutions for car, caravan, house, office, boat
    and tent.
    Allgon 1800 Signal Enhancers now GBP20.



  3. #3
    durk
    Guest

    Re: where is internal antenna on Siemens C45

    Hi Peter,

    thanks very much for your answer. I looked at the top of the phone and
    I saw two areas on the backt that might be it and one on the front. I
    made some pictures and put them at
    http://www.durkgardenier.nl/spec/gsmant/

    Would it be possible that you take a look and identify the antenna? I
    am a photographer and need a picture of one so your help is apreciated
    very much.

    Best regards,

    Durk

    Durk Gardenier
    www.durkgardenier.nl

    Peter Parry wrote:
    > On 21 Jun 2006 13:27:31 -0700, "durk" <[email protected]> wrote:
    >
    > >I have now opened a Siemens C45 I no longer use
    > >and have no idea what the internal antenna is. Also I cannot find on
    > >the net diagrams of the circuitry where the antenna is shown.
    > >Does anyone have a link to a photography or diagram in which the
    > >location is clearly indicated? All help is appreciated.

    >
    > It is always at the top of the phone (to get clear of your hand) and
    > is usually a patch antenna - a metallised coating on a plastic
    > moulding or, less often, a PCB antenna. They don't look much like a
    > conventional antenna, for example look at
    > http://www.accessoriesresources.com/...3573053302.jpg and
    > http://www.accessoriesresources.com/...3592464956.jpg
    >
    > these are Nokia but the Siemens will probably be similar.
    >
    >
    > --
    > Peter Parry |Hemel Hempstead| tel +44 (0)1442 212855 |
    > WPP Ltd |Herts, UK | fax +44 (0)7989 853112 |
    > Antenna solutions for car, caravan, house, office, boat
    > and tent.
    > Allgon 1800 Signal Enhancers now GBP20.





  4. #4
    Peter Parry
    Guest

    Re: where is internal antenna on Siemens C45

    On 21 Jun 2006 23:42:11 -0700, "durk" <[email protected]> wrote:

    >thanks very much for your answer. I looked at the top of the phone and
    >I saw two areas on the backt that might be it and one on the front. I
    >made some pictures and put them at
    >http://www.durkgardenier.nl/spec/gsmant/


    The C45 is a dual band phone so it should be something more complex
    than the simple patch shown on antenna.jpg. If you look at that
    picture the pad on the left near the external antenna socket looks
    like a contact pad - are there any faint contact marks on it?.
    Antenna-3 is showing the earth plane and speaker contacts.

    Look inside the rear case - is there a metal plate there which aligns
    with either or both of the two pads in antenna.jpg? There is an
    image of the S45 antenna at
    http://www.huahongnet.com/siemens_antenna.htm# , I'd expect the C45
    antenna to be similar.


    --
    Peter Parry.
    http://www.wpp.ltd.uk/



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