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amar
Antenna-Theory.com Newbie
Joined: 06 Jan 2013
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 Posted: Sun Jan 06, 2013 8:40 pm Post subject: bending of antenna |
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may i know why the bending of antenna is important? why we just cant use two parallel wire?
thanks in advanced |
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Schubert
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amar
Antenna-Theory.com Newbie
Joined: 06 Jan 2013
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| Posted: Mon Jan 07, 2013 7:40 am Post subject: Re: dipole antennas |
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for example two wire antenna.. |
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Schubert
Antenna Wizard
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| Posted: Mon Jan 07, 2013 6:16 pm Post subject: |
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I understand your question now.
A dipole antenna radiates because the currents on each arm are flowing in the same direction. If the arms are not bent, then the current will flow in the transmission line mode. This means the current flows in one direction on the top arm and the opposite direction on the bottom arm. Hence the currents cancel each other out as far as radiation is concerned. This is also why transmission lines don't radiate. |
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amar
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Joined: 06 Jan 2013
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| Posted: Thu Jan 10, 2013 7:44 pm Post subject: |
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| Schubert wrote: | I understand your question now.
A dipole antenna radiates because the currents on each arm are flowing in the same direction. If the arms are not bent, then the current will flow in the transmission line mode. This means the current flows in one direction on the top arm and the opposite direction on the bottom arm. Hence the currents cancel each other out as far as radiation is concerned. This is also why transmission lines don't radiate. |
but how the current will flow in antenna as one of its end are at open space ,
i think circuit is not complete so how current can be there? |
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Schubert
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