One last thing: the BEAMWIDTH will also be broader with the driven array.
Quoting Rick Karlquist <email@example.com>:
> firstname.lastname@example.org wrote:
>> It would be easier to just feed one vertical with a random length of 50
>> ohm coax and make the other vertical a parasitic reflector.
>> John KK9A
> There are 2 disadvantages to that.
> 1. The front to back will be 10 dB at best, whereas with a driven
> array you can easily get 20 or 30 dB. For receiving purposes, a
> driven 2 element array is as good as a parasitic 3 element array.
> 2. The bandwidth of a parasitic array is considerably less than
> a driven array.
> Rick N6RK
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