Terry and Guy,
Thanks for the replies.
I am using EZNEC+. The gain difference is as Terry commented; I hadn't set
the Az angle to 45 degrees for the El plot. It makes sense now.
73
Andrew
----- Original Message -----
From: "Terry Conboy" <n6ry@arrl.net>
To: "Andy Ikin" <andrew.ikin@btopenworld.com>
Cc: <antennaware@contesting.com>
Sent: Thursday, July 09, 2009 3:43 AM
Subject: Re: [Antennaware] 4 sq. AZ and EL gain
> Is it possible you are looking at the elevation pattern at 45 degrees off
> of boresight? Say at 0 or 90 degrees azimuth? The models that come with
> EZNEC at oriented with line of the elements parallel to the X and Y axes,
> so the main lobe is at 45 degrees and the gain at 0 or 90 is down about
> 2.5 dB.
>
> 73, Terry N6RY
>
> On 2009-07-08 3:35 PM, Andy Ikin wrote:
>> Hello Folks,
>>
>> I am trying to make some meaningful RDF comparisons with Vertical arrays,
>> K9AY arrays and 4 sq. Vertical arrays.
>>
>> I appear to have an anomaly with the 4 sq. i.e. If I look at the max. EL
>> gain (TOA ) at say 20 degrees. I have say 4.0dBi. I then look at the AZ
>> gain at 20 degrees the gain is approx. twice the EL gain.
>> Looking at examples of Vertical and K9AY arrays the max. EL gain (TOA )
>> is equal to the AZ gain at the same TOA; This would appear to be correct.
>>
>> So what am I doing wrong with the 4 Sq.??
>>
>> 73
>>
>> Andrew
>>
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>>
>>
>
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