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Re: [WestMichiganHams] WiFi Polarization

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  • k8mhz@k8mhz.com
    May I suggest a Cantenna? Mine works well as a waveguided directional. Parts are 1 coffee can, 1 chassis mount PL259 connector, a piece of #12 solid wire 1.21
    Message 1 of 8 , Sep 4 6:19 PM
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      May I suggest a Cantenna?  Mine works well as a waveguided directional.
       
      Parts are 1 coffee can, 1 chassis mount PL259 connector, a piece of #12 solid wire 1.21 inches long, four screws, a 1/4x20 nut and some electrical tape.  Fits nicely on my camera tripod.
       
      ----- Original Message -----
      Sent: Monday, September 04, 2006 20:12
      Subject: Re: [WestMichiganHams] WiFi Polarization

      Vertical it is by popular consensus... . Now to build the antenna..... ..KV8X 
       
      -------Original Message----- --
       
      Date: 09/04/06 14:43:20
      Subject: Re: [WestMichiganHams] WiFi Polarization
       
      Every access point/router/ unit with an external antenna I have ever seen
      has used vertical polarization, though it seems that the PCMCIA cards
      must be using horizontal antennae. Vertical is probably the preferred
      polarization.
       
      -Joe, KD8ATU
       
      Al Pepping wrote:
      >     Anyone know  if there is a "standard" protocol for what type of
      > polarization is used for WiFi antenna systems?
      >
      >                                                                                                                                   KV8X
       
       
       
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    • Al Pepping
      The cantenna is what I had in mind....with a little variation. Back in the 60 s a physicist working with the USAF developed a unique antenna called the SBA,
      Message 2 of 8 , Sep 4 8:11 PM
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        The cantenna is what I had in mind....with a little variation.  Back in the 60's  a physicist working with the USAF developed a unique antenna called the SBA, or short backfire antenna.  It works on the same principle as the cantenna, but picture a cookie tin used as the waveguide as opposed to a coffee can.  It has a larger diameter and less depth than a coffee can.  From what  I've read so far, the SBA is a big hit with the WiFi group in Europe.   I'll pass along a couple of links from the IEEE group with photos and such if you are interested. 
                What distances have you covered with the cantenna design so far??    My radio range is roughly 15 miles at 2.4 gHz,  and I have multi mode RX capability on that band .  Just need to build an antenna, hoist it up 80 feet and see what we can hear.    This could prove  very interesting !!!                                                                              
                                                            KV8X
         
        -------Original Message-------
         
        From: k8mhz@...
        Date: 09/04/06 21:23:37
        Subject: Re: [WestMichiganHams] WiFi Polarization
         
        May I suggest a Cantenna?  Mine works well as a waveguided directional.
         
        Parts are 1 coffee can, 1 chassis mount PL259 connector, a piece of #12 solid wire 1.21 inches long, four screws, a 1/4x20 nut and some electrical tape.  Fits nicely on my camera tripod.
         
        ----- Original Message -----
        Sent: Monday, September 04, 2006 20:12
        Subject: Re: [WestMichiganHams] WiFi Polarization

        Vertical it is by popular consensus... . Now to build the antenna..... ..KV8X 
         
        -------Original Message----- --
         
        Date: 09/04/06 14:43:20
        Subject: Re: [WestMichiganHams] WiFi Polarization
         
        Every access point/router/ unit with an external antenna I have ever seen
        has used vertical polarization, though it seems that the PCMCIA cards
        must be using horizontal antennae. Vertical is probably the preferred
        polarization.
         
        -Joe, KD8ATU
         
        Al Pepping wrote:
        >     Anyone know  if there is a "standard" protocol for what type of
        > polarization is used for WiFi antenna systems?
        >
        >                                                                                                                                   KV8X
         
         
         
        Yahoo! Groups Links
         
        <*> To visit your group on the web, go to:
         
        <*> To unsubscribe from this group, send an email to:
         
        <*> Your use of Yahoo! Groups is subject to:
         
         
         
         
         


        Internal Virus Database is out-of-date.
        Checked by AVG Free Edition.
        Version: 7.1.405 / Virus Database: 268.11.6/428 - Release Date: 8/25/2006
         
      • k8mhz@k8mhz.com
        Yes, Plans and info for the SBA would be interesting. I don t really know what the range of the Cantenna is. 15 miles is very doubtful. With the new MiMAX
        Message 3 of 8 , Sep 5 6:56 AM
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          Yes,
           
          Plans and info for the SBA would be interesting.
           
          I don't really know what the range of the Cantenna is.  15 miles is very doubtful.
           
          With the new MiMAX coming to other townships first I would like to try a little DXing then.
           
          ----- Original Message -----
          Sent: Tuesday, September 05, 2006 04:11
          Subject: Re: [WestMichiganHams] WiFi Polarization

          The cantenna is what I had in mind....with a little variation.  Back in the 60's  a physicist working with the USAF developed a unique antenna called the SBA, or short backfire antenna.  It works on the same principle as the cantenna, but picture a cookie tin used as the waveguide as opposed to a coffee can.  It has a larger diameter and less depth than a coffee can.  From what  I've read so far, the SBA is a big hit with the WiFi group in Europe.   I'll pass along a couple of links from the IEEE group with photos and such if you are interested. 
                  What distances have you covered with the cantenna design so far??    My radio range is roughly 15 miles at 2.4 gHz,  and I have multi mode RX capability on that band .  Just need to build an antenna, hoist it up 80 feet and see what we can hear.    This could prove  very interesting !!!                                                                              
                                                              KV8X
           
          -------Original Message----- --
           
          Date: 09/04/06 21:23:37
          Subject: Re: [WestMichiganHams] WiFi Polarization
           
          May I suggest a Cantenna?  Mine works well as a waveguided directional.
           
          Parts are 1 coffee can, 1 chassis mount PL259 connector, a piece of #12 solid wire 1.21 inches long, four screws, a 1/4x20 nut and some electrical tape.  Fits nicely on my camera tripod.
           
          ----- Original Message -----
          Sent: Monday, September 04, 2006 20:12
          Subject: Re: [WestMichiganHams] WiFi Polarization

          Vertical it is by popular consensus... . Now to build the antenna..... ..KV8X 
           
          -------Original Message----- --
           
          Date: 09/04/06 14:43:20
          Subject: Re: [WestMichiganHams] WiFi Polarization
           
          Every access point/router/ unit with an external antenna I have ever seen
          has used vertical polarization, though it seems that the PCMCIA cards
          must be using horizontal antennae. Vertical is probably the preferred
          polarization.
           
          -Joe, KD8ATU
           
          Al Pepping wrote:
          >     Anyone know  if there is a "standard" protocol for what type of
          > polarization is used for WiFi antenna systems?
          >
          >                                                                                                                                   KV8X
           
           
           
          Yahoo! Groups Links
           
          <*> To visit your group on the web, go to:
           
          <*> To unsubscribe from this group, send an email to:
           
          <*> Your use of Yahoo! Groups is subject to:
           
           
           
           
           


          Internal Virus Database is out-of-date.
          Checked by AVG Free Edition.
          Version: 7.1.405 / Virus Database: 268.11.6/428 - Release Date: 8/25/2006
           


          Internal Virus Database is out-of-date.
          Checked by AVG Free Edition.
          Version: 7.1.405 / Virus Database: 268.11.6/428 - Release Date: 8/25/2006
        • k8mhz@k8mhz.com
          Al, I found some plans for the SBA. The predicted gain is 14dBi. It does not look very hard to construct. The material is copper and may be pricey but there
          Message 4 of 8 , Sep 5 1:32 PM
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            Al,
             
            I found some plans for the SBA.  The predicted gain is 14dBi.
             
            It does not look very hard to construct.  The material is copper and may be pricey but there is a metal shop here in town that stocks it and will sell cuts.
             
            Mark K8MHZ
             
            ----- Original Message -----
            From: k8mhz@...
            Sent: Tuesday, September 05, 2006 14:56
            Subject: Re: [WestMichiganHams] WiFi Polarization

            Yes,
             
            Plans and info for the SBA would be interesting.
             
            I don't really know what the range of the Cantenna is.  15 miles is very doubtful.
             
            With the new MiMAX coming to other townships first I would like to try a little DXing then.
             
            ----- Original Message -----
            Sent: Tuesday, September 05, 2006 04:11
            Subject: Re: [WestMichiganHams] WiFi Polarization

            The cantenna is what I had in mind....with a little variation.  Back in the 60's  a physicist working with the USAF developed a unique antenna called the SBA, or short backfire antenna.  It works on the same principle as the cantenna, but picture a cookie tin used as the waveguide as opposed to a coffee can.  It has a larger diameter and less depth than a coffee can.  From what  I've read so far, the SBA is a big hit with the WiFi group in Europe.   I'll pass along a couple of links from the IEEE group with photos and such if you are interested. 
                    What distances have you covered with the cantenna design so far??    My radio range is roughly 15 miles at 2.4 gHz,  and I have multi mode RX capability on that band .  Just need to build an antenna, hoist it up 80 feet and see what we can hear.    This could prove  very interesting !!!                                                                              
                                                                KV8X
             
            -------Original Message----- --
             
            Date: 09/04/06 21:23:37
            Subject: Re: [WestMichiganHams] WiFi Polarization
             
            May I suggest a Cantenna?  Mine works well as a waveguided directional.
             
            Parts are 1 coffee can, 1 chassis mount PL259 connector, a piece of #12 solid wire 1.21 inches long, four screws, a 1/4x20 nut and some electrical tape.  Fits nicely on my camera tripod.
             
            ----- Original Message -----
            Sent: Monday, September 04, 2006 20:12
            Subject: Re: [WestMichiganHams] WiFi Polarization

            Vertical it is by popular consensus... . Now to build the antenna..... ..KV8X 
             
            -------Original Message----- --
             
            Date: 09/04/06 14:43:20
            Subject: Re: [WestMichiganHams] WiFi Polarization
             
            Every access point/router/ unit with an external antenna I have ever seen
            has used vertical polarization, though it seems that the PCMCIA cards
            must be using horizontal antennae. Vertical is probably the preferred
            polarization.
             
            -Joe, KD8ATU
             
            Al Pepping wrote:
            >     Anyone know  if there is a "standard" protocol for what type of
            > polarization is used for WiFi antenna systems?
            >
            >                                                                                                                                   KV8X
             
             
             
            Yahoo! Groups Links
             
            <*> To visit your group on the web, go to:
             
            <*> To unsubscribe from this group, send an email to:
             
            <*> Your use of Yahoo! Groups is subject to:
             
             
             
             
             


            Internal Virus Database is out-of-date.
            Checked by AVG Free Edition.
            Version: 7.1.405 / Virus Database: 268.11.6/428 - Release Date: 8/25/2006
             


            Internal Virus Database is out-of-date.
            Checked by AVG Free Edition.
            Version: 7.1.405 / Virus Database: 268.11.6/428 - Release Date: 8/25/2006


            Internal Virus Database is out-of-date.
            Checked by AVG Free Edition.
            Version: 7.1.405 / Virus Database: 268.11.6/428 - Release Date: 8/25/2006
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