[ARC5] Impedance of an end-fed short aerial/antenna

[Michael A. Bittner]

Except that in the USA, the Latin plural is reserved for the natural world while the anglicized plural is used for man-made antennas.  Thus, insects and crustaceans have antennae, while radios have antennas.  Reference Dr. John Kraus' seminal work on antennas appropriately titled " Antennas".   Now about "frame aerials", aka loop antennas.....

Mike, W6MAB
  ----- Original Message ----- 
  From: Mike Everette 
  To: Leslie Smith ; Brooke Clarke 
  Cc: ARC-5 List 
  Sent: Friday, February 01, 2013 8:35 PM
  Subject: Re: [ARC5] Impedance of an end-fed short aerial/antenna


  For the record:

  ANTENNA is singular; one antenna.

  ANTENNAE is plural; not two antennas, but rather, two antennae.

  It's from Latin.  (I took Latin in high school; this is one of the few things I actually remember....)

  73

  Mike
  W4DSE

  --- On Thu, 1/31/13, Brooke Clarke <brooke at pacific.net> wrote:

  > From: Brooke Clarke <brooke at pacific.net>
  > Subject: Re: [ARC5] Impedance of an end-fed short aerial/antenna
  > To: "Leslie Smith" <vk2bcu at operamail.com>
  > Cc: "ARC-5 List" <arc5 at mailman.qth.net>
  > Date: Thursday, January 31, 2013, 10:39 PM
  > Hi Leslie:
  > 
  > This web page and those it links to may answer your
  > question.
  > http://personal.ee.surrey.ac.uk/Personal/D.Jefferies/radimp.html
  > 
  > In general a length of wire that's shorter than 1/4
  > wavelength is a small value capacitor
  > 
  > Have Fun,
  > 
  > Brooke Clarke, N6GCE
  > http://www.PRC68.com
  > http://www.end2partygovernment.com/2012Issues.html
  > 
  > Leslie Smith wrote:....
  >  Second, there are many pages on the web that will calculate
  > the proper length for a resonant aerial. (hehe - no antennae
  > here - we follow the "Brits" in how we use language). I'm
  > interested in the load impedance of "off-resonant" end fed
  > wires. So - for example if I have a 35 foot length of wire
  > trailing out the back of an aircraft, what complex "Z" will
  > that present to the 1625's in the PA at, say 3.550 MHz. What
  > it the wire is 55 feet long? Anyway, in the past I found a
  > page that made that calculation - not for an aircraft, but
  > for an end fed random wire. The calclulation allowed for a
  > good many parameters, eg the dia of the wire (1mm, 2.5mm
  > etc), height of the wire above ground and even soil type.
  > The calculation result gave the impdedance as resistive and
  > reactive components. Having searched (googled) for about and
  > hour or so - I can't find it. Any pointers, clever types? 73
  > de VK2-land Les
  > 
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