Antenna length efficiency technical question

[N_Jay]

I wonder if UDF got the amswer.

1) Yes there will be field strength differences

2) No, they are NOT related to teh antennas

3) They are related to teh propagation losses (which were not asked about)

4) N_Jay says that they will be relitivly small (using UDF's second question where he mentions 20 feet)

5) VXA continues to say they will be large

P.S. In 20 feet they will be small
P.P.S. For most line of sight paths they wil be small :twisted:

 

[crayon]

Oh Crayon, go take a hike, will ya?

If you are referring to our discussion over the quote syntax .. I am guessing you did not *really* read my post. How you choose to post in the future is of no concern to me.

If you are referring to antenna disscussion at hand .. not a chance. (at least to a point, the phrase "wrestling with a pig" comes to mind as I compose this .. ) Mis-information has a habit of mutating into facts if not promptly rebutted.

ummm ... since you are unwilling to abandon your incorrect application of electronic theory, you do not need to concern yourself with the following.

Cheers!

 

[crayon]

For those that are keenly interested in electronic communication theory, and the question at hand, Robert L. Shrader wrote what some consider to be the bible. Titled appropriately enough: "Electronic Communication". I personally have the sixth edition on my bookshelf and refer to it all the time.

I belive that N_Jay and I have articulated the correct answer, and relevent exceptions, to the question:

do vertical 1/4 wave antennas become somehow less efficient as they greatly decrease in size?

but sometimes it is nice to have a third party, considered to be authoritive, to quote from.

On page 441, section 20-11, titled TUNING ANTENNA WIRES:

To produce optimum operation, an antenna shoud be tuned to resonance. Such tuning is accomplished, basically, by adjusting it to a 1/2 [wavelength] (or 1/4 [wavelength] if ground).

CONCLUSION: As long as a 1/4 antenna is resonating on the desired frequency, either 28MHz or 2.8GHz, it is considered to be at "optimum operation".