Topband: Antenna Impedance vs efficiency

[Sinisa Hristov]

Ford Peterson wrote:

> Lately I've been pondering the notion of the impedance of free space.  I'm told that the characteristic impedance of free space is 377 ohms.  I have no idea where that comes from, or how it is measured.

It is the ratio of electric intensity to magnetic intensity,
in the "far" or "radiation" field.


> Is there any intrinsic loss attributable to coupling a relatively low impedance system to
> the high impedance of free space?  

No, there isn't.


> is there any benefit to using a higher impedance system?

No.


73,

Sinisa  YT1NT, VE3EA