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WiFi Polarization

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  • Al Pepping
    Anyone know if there is a standard protocol for what type of polarization is used for WiFi antenna systems? KV8X
    Message 1 of 8 , Sep 4, 2006
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          Anyone know  if there is a "standard" protocol for what type of polarization is used for WiFi antenna systems?
       
                                                                                                                                        KV8X                                                                                                     
    • k8mhz@k8mhz.com
      Looking at the antennas used in GH they seem to be vertical. I have also noticed that most laptop adaptors are vertically polarized. Usually anything meant
      Message 2 of 8 , Sep 4, 2006
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        Looking at the antennas used in GH they seem to be vertical.  I have also noticed that most laptop adaptors are vertically polarized.  Usually anything meant for mobile use has the best luck with vertical antennas.
         
        You may see the use of fractal design antennas in WiFi.  Although it is hard to tell by looking at them they are a form of dipole and have specific polarization.  I built a 2.4 gig waveguide directional and found most signals to be vertical with a huge loss only a few degrees from vertical.
        ----- Original Message -----
        Sent: Monday, September 04, 2006 18:27
        Subject: [WestMichiganHams] WiFi Polarization

            Anyone know  if there is a "standard" protocol for what type of polarization is used for WiFi antenna systems?
         
                                                                                                                                          KV8X                                                                                   bsp;                 


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      • Joe Veldhuis
        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
        Message 3 of 8 , Sep 4, 2006
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          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
        • Al Pepping
          Vertical it is by popular consensus.... Now to build the antenna.......KV8X ... From: Joe Veldhuis Date: 09/04/06 14:43:20 To: WestMichiganHams@yahoogroups.com
          Message 4 of 8 , Sep 4, 2006
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            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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          • 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 5 of 8 , Sep 4, 2006
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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
               
               
               
              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:
               
               
               
               
               


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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 6 of 8 , Sep 4, 2006
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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 7 of 8 , Sep 5, 2006
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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 8 of 8 , Sep 5, 2006
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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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