Hi,

I am looking for an explanation of how an antenna receives a signal due
to the E-field of an electromagnetic wave.

I have looked in some books, and can understand transmission, but the
books I have looked in don't explain reception.

I have found an explanation of how the H-field induces a signal in a loop
antenna: a changing magnetic flux will induce a current.

But what about the E-field and a dipole antenna? I guess that the E-field
causes electrons to move in the antenna wire, because in a solid
conductor, electrons will move until the E-field inside the solid is
cancelled out?

I have googled but having difficulty finding a good explanation. Any
pointers?

Thanks & regards,

Paul.

--
Remove _rem_ before replying by email.

"Paul Taylor" wrote in message
news
Hi,

I am looking for an explanation of how an antenna receives a signal
due
to the E-field of an electromagnetic wave.

I have looked in some books, and can understand transmission, but
the
books I have looked in don't explain reception.

I have found an explanation of how the H-field induces a signal in a
loop
antenna: a changing magnetic flux will induce a current.

But what about the E-field and a dipole antenna? I guess that the
E-field
causes electrons to move in the antenna wire, because in a solid
conductor, electrons will move until the E-field inside the solid is
cancelled out?

I have googled but having difficulty finding a good explanation.

===================================

It is impossible for an E-field to exist without an H-field.

Therefore, antennas of all sorts receive signals in the same way as a
simple loop. Calculations can begin using either the E-field or the
H-field but they both give the same answer.
----
Reg.

Reg Edwards wrote:

It is impossible for an E-field to exist without an H-field.

Must have been before electrostatics was invented. :-)

ac6xg

Jim Kelley wrote:
Reg Edwards wrote:

It is impossible for an E-field to exist without an H-field.


Must have been before electrostatics was invented. :-)

ac6xg



How do you make an electrostatic radio wave?
73,
Tom Donaly, KA6RUH

Tom Donaly wrote:
Jim Kelley wrote:

Reg Edwards wrote:

It is impossible for an E-field to exist without an H-field.



Must have been before electrostatics was invented. :-)

ac6xg



How do you make an electrostatic radio wave?
73,
Tom Donaly, KA6RUH

Certainly you're aware that radio waves don't have a monopoly on E
fields, Tom.

73, jk

Jim Kelley wrote:
Certainly you're aware that radio waves don't have a monopoly on E
fields, Tom.

But they should have a monopoly on threads in this newsgroup. :-)
--
73, Cecil http://www.qsl.net/w5dxp

Tom Donaly wrote:
Jim Kelley wrote:

Reg Edwards wrote:

It is impossible for an E-field to exist without an H-field.



Must have been before electrostatics was invented. :-)

ac6xg



How do you make an electrostatic radio wave?


Wave to it first?

- 73 de Mike KB3EIA -

"Jim Kelley" bravely wrote to "All" (28 Nov 05 11:52:53)
--- on the heady topic of " Antenna reception theory"

JK From: Jim Kelley
JK Xref: core-easynews rec.radio.amateur.antenna:220506

JK Reg Edwards wrote:

It is impossible for an E-field to exist without an H-field.

JK Must have been before electrostatics was invented. :-)


Yes, but you are changing the topic into static fields. We were
discussing changing electric fields, not statics but dynamics!

A*s*i*m*o*v

.... "Hey, I'm just this guy, see?" --Zaphod Beeblebrox

Asimov wrote:
Yes, but you are changing the topic into static fields. We were
discussing changing electric fields, not statics but dynamics!

When is someone going to come up with a context-free language?
--
73, Cecil http://www.qsl.net/w5dxp

Asimov wrote:

"Jim Kelley" bravely wrote to "All" (28 Nov 05 11:52:53)
--- on the heady topic of " Antenna reception theory"

JK From: Jim Kelley
JK Xref: core-easynews rec.radio.amateur.antenna:220506

JK Reg Edwards wrote:

It is impossible for an E-field to exist without an H-field.

JK Must have been before electrostatics was invented. :-)


Yes, but you are changing the topic into static fields. We were
discussing changing electric fields, not statics but dynamics!

But do you agree that it's not impossible for an E field to exist
without an H field?

ac6xg