TEST RESULTS DATA: ANT-1-B0

A SIMPLE DIPOLE, NO BALUN, NO CHOKE

(Tested Here:  Inverted-V  configuration)

GENERAL TEST CONFIGURATIONS:

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ANTENNA               ANTENNA ROTATED     WORST CASE  (WC)         WC ROTATED

SPECIFIC TEST CONFIGURATIONS:

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BASIC ANT             COAX λ/2 (el.)            COAX λ/2 (cmc)       COAX λ/2 (cmc)WC

NOTE:

BASIC CHARACTERISTICS:

SWR Curves measured with a RigExpert AA-54:

ANALYZER DATA:

Here are the original data files, as measured on a RigExpert AA-54.

Viewing Analyzer Data on YOUR computer:

You can view ALL of the data measured by the analyzer on your own computer.

For instructions on how to do this, see:  Viewing Analyzer Data

TEST CONFIGURATIONS:

(click on picture)

ANTENNA              ANTENNA ROTATED     WORST CASE  (WC)         WC ROTATED

The measured CMC results while running 100w into this antenna are shown in the file below.

NOTE:  When I ran the initial set of tests on ANT-1-B0, I took each measurement on two different settings of the RF Ammeter:

The 100 mA is an "amplified" reading, meaning the signal is amplified.

The 300 mA scale is not amplified.  It reads directly to the meter.

As you see in the results, the measured values were always different.

My gut feeling is, the non-amplified scale is more accurate than the amplified scale.

REALITY:  IT DOES NOT MATTER.

REASON:  At very low values where you need the amplified scale, the amount of CMC is so low that it causes no impact to the antenna.  

THE POINT OF MINIMUM SWR.= RESONANCE ...WRONG!

This is a common misconception!

Of course it is generally pretty close to the point of resonance

but it is never exactly the same point,

ESPECIALLY IN THE PRESENCE OF COMMON MODE CURRENT!

The file below shows the measured resonance of the antenna when measured:

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