[Antennas] Fat rugged dipole?

Wed Jul 27 19:14:58 EDT 2016

Someone here must know just how long those short, wide "blade" dipoles 
on military aircraft (operating at the range he is talking about) are. 
 From what I recall they are pretty short, just a few inches and there 
must be millions of them in use from 225-400MHz.
Dave VE3HLU
On 7/27/2016 6:21 PM, frank wrote:
> On 2016年7月27日 16:35:38 -0400
> "D.J.J. Ring, Jr." <n1ea at arrl.net> wrote:
>>> Frank,
>>>> Kirk was talking about:
>>>> Generally, for an element of 4" or 6" length, how fat would it need to be to
>>> be resonant at 312 MHz?
>>>>> That's what I meant about he's not going to change the laws of physics -
>> he's not going to make a half wave which is 1.5 feet change into 4 inches.
>>>> He's asking for a 300% to 450% percent reduction in size.
>>> I see. Yes, that is not going to happen unless there are significant losses. Of course we do not know what sort of range is desired or how much power is involved. For a range of a mile or so with 1 watt of RF, I would try a 2 watt non-inductive resistor. Dummy loads don't radiate because they are shielded. Otherwise they make decent short range antennas. How big is the antenna attached to your key fob for acess to your car?
>>> 73, Frank
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