Size of ground plane disk for vertical antennas?

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I’m looking for information about the diameter of a ground plane disk that I can use with a regular car radio and car type antennas in my home. DIY would be best, or any other ideas for a antenna that will work.



I have tried Google, but have found nothing useful for what I’m trying to accomplish.






antenna-construction vertical-antenna







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    Hi Greg, and welcome to ham.stackexchange.com! :-) Are you interested in AM or FM radio?
    – Mike Waters♦
    45 mins ago














up vote
2
down vote

favorite












I’m looking for information about the diameter of a ground plane disk that I can use with a regular car radio and car type antennas in my home. DIY would be best, or any other ideas for a antenna that will work.



I have tried Google, but have found nothing useful for what I’m trying to accomplish.






antenna-construction vertical-antenna







share|improve this question









New contributor




Gregory DeHart is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.















  • 1




    Hi Greg, and welcome to ham.stackexchange.com! :-) Are you interested in AM or FM radio?
    – Mike Waters♦
    45 mins ago












up vote
2
down vote

favorite









up vote
2
down vote

favorite











I’m looking for information about the diameter of a ground plane disk that I can use with a regular car radio and car type antennas in my home. DIY would be best, or any other ideas for a antenna that will work.



I have tried Google, but have found nothing useful for what I’m trying to accomplish.






antenna-construction vertical-antenna







share|improve this question









New contributor




Gregory DeHart is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











I’m looking for information about the diameter of a ground plane disk that I can use with a regular car radio and car type antennas in my home. DIY would be best, or any other ideas for a antenna that will work.



I have tried Google, but have found nothing useful for what I’m trying to accomplish.






antenna-construction vertical-antenna




antenna-construction vertical-antenna






share|improve this question









New contributor




Gregory DeHart is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









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Gregory DeHart is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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edited 48 mins ago









Mike Waters♦

2,6202531




2,6202531






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asked 4 hours ago









Gregory DeHart

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Gregory DeHart is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Gregory DeHart is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







  • 1




    Hi Greg, and welcome to ham.stackexchange.com! :-) Are you interested in AM or FM radio?
    – Mike Waters♦
    45 mins ago












  • 1




    Hi Greg, and welcome to ham.stackexchange.com! :-) Are you interested in AM or FM radio?
    – Mike Waters♦
    45 mins ago







1




1




Hi Greg, and welcome to ham.stackexchange.com! :-) Are you interested in AM or FM radio?
– Mike Waters♦
45 mins ago




Hi Greg, and welcome to ham.stackexchange.com! :-) Are you interested in AM or FM radio?
– Mike Waters♦
45 mins ago










2 Answers
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Rule of thumb: the ground plane radius should be at least a quarter wavelength.






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    up vote
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    down vote













    If I understand correctly, you have an antenna intended for a car body, but you'd like to use it loose in your house.



    A solid ground plane will work, and it should be a quarter wave radius. For FM Radio, wavelength is about 3 m, so the ground plane should be 1.5 metres in diameter.



    Instead of a solid ground plane, you could use four radial wires, 0.75 m long, extending at right angles to the whip antenna. They should all be connected to the ground bolt or metal base of the whip. You could use coat hangers or any other stiff wire - diameter and type is not important so select something that is mechanically strong enough. This will be a lot lighter and cheaper than the solid metal ground. It is what's done when mounting a whip on a fibreglass vehicle, or through a tile roof.






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      2 Answers
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      Rule of thumb: the ground plane radius should be at least a quarter wavelength.






      share|improve this answer
























        up vote
        2
        down vote













        Rule of thumb: the ground plane radius should be at least a quarter wavelength.






        share|improve this answer






















          up vote
          2
          down vote










          up vote
          2
          down vote









          Rule of thumb: the ground plane radius should be at least a quarter wavelength.






          share|improve this answer












          Rule of thumb: the ground plane radius should be at least a quarter wavelength.







          share|improve this answer












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          share|improve this answer










          answered 1 hour ago









          Phil Frost - W8II

          26k142113




          26k142113




















              up vote
              1
              down vote













              If I understand correctly, you have an antenna intended for a car body, but you'd like to use it loose in your house.



              A solid ground plane will work, and it should be a quarter wave radius. For FM Radio, wavelength is about 3 m, so the ground plane should be 1.5 metres in diameter.



              Instead of a solid ground plane, you could use four radial wires, 0.75 m long, extending at right angles to the whip antenna. They should all be connected to the ground bolt or metal base of the whip. You could use coat hangers or any other stiff wire - diameter and type is not important so select something that is mechanically strong enough. This will be a lot lighter and cheaper than the solid metal ground. It is what's done when mounting a whip on a fibreglass vehicle, or through a tile roof.






              share|improve this answer
























                up vote
                1
                down vote













                If I understand correctly, you have an antenna intended for a car body, but you'd like to use it loose in your house.



                A solid ground plane will work, and it should be a quarter wave radius. For FM Radio, wavelength is about 3 m, so the ground plane should be 1.5 metres in diameter.



                Instead of a solid ground plane, you could use four radial wires, 0.75 m long, extending at right angles to the whip antenna. They should all be connected to the ground bolt or metal base of the whip. You could use coat hangers or any other stiff wire - diameter and type is not important so select something that is mechanically strong enough. This will be a lot lighter and cheaper than the solid metal ground. It is what's done when mounting a whip on a fibreglass vehicle, or through a tile roof.






                share|improve this answer






















                  up vote
                  1
                  down vote










                  up vote
                  1
                  down vote









                  If I understand correctly, you have an antenna intended for a car body, but you'd like to use it loose in your house.



                  A solid ground plane will work, and it should be a quarter wave radius. For FM Radio, wavelength is about 3 m, so the ground plane should be 1.5 metres in diameter.



                  Instead of a solid ground plane, you could use four radial wires, 0.75 m long, extending at right angles to the whip antenna. They should all be connected to the ground bolt or metal base of the whip. You could use coat hangers or any other stiff wire - diameter and type is not important so select something that is mechanically strong enough. This will be a lot lighter and cheaper than the solid metal ground. It is what's done when mounting a whip on a fibreglass vehicle, or through a tile roof.






                  share|improve this answer












                  If I understand correctly, you have an antenna intended for a car body, but you'd like to use it loose in your house.



                  A solid ground plane will work, and it should be a quarter wave radius. For FM Radio, wavelength is about 3 m, so the ground plane should be 1.5 metres in diameter.



                  Instead of a solid ground plane, you could use four radial wires, 0.75 m long, extending at right angles to the whip antenna. They should all be connected to the ground bolt or metal base of the whip. You could use coat hangers or any other stiff wire - diameter and type is not important so select something that is mechanically strong enough. This will be a lot lighter and cheaper than the solid metal ground. It is what's done when mounting a whip on a fibreglass vehicle, or through a tile roof.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered 44 mins ago









                  tomnexus

                  2,042413




                  2,042413




















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