Constant Wire Comparisons


Constant Fractal Comparisons


Constant Height Comparisons


Constant Band Comparisons


Wide Band Comparisons

Constant Height Comparisons

The purpose of this survey was to examine the correlation between fractal form and radiation patterns. Where there was a very definite pattern shown for drivepoint Z, finding correlations to radiation characteristics is limited. Even so, the fractal exhibits higher gains and more frequent tunable opportunities than the referenece monopole of the same height.

All of the readings below link to the full page elevation display. The numbers below are the best figure obtained from any particular perspective. This value viewed in isolation below, at best, represents a figure of merit. The degree of merit is found in the application's fit to the gains and lobes offered. As such, DX antennas and Cloud Warmers compete equally by the numbers listed in the table below. So, with the second table, the same views are restricted to launch angles of 15 degrees or less. The second table reveals that these tall fractals have very good characteristics as DX antennas.

I use a coloring system to denote how much power is lost to radiation outside of the DX angles. The light red denotes the least loss, and the dark red the most. Or in dB:

0 to 3

3 to 6

6 to 9

9 to 12
Even with losses deep in the red, the fractals still present useful radiatiors.

Best lobe value over the elevation range of 0 to 90 degrees:

 Second Order

160M
1-2

80M
2-4

40M
4-8

30M
8-12

20M
12-16

17M
16-20

15M
20-24

12M
24-28

10M
28-32

32-36

36-40

40-44

44-50

16 meter Standard

 

 

 5.03

 

4.20

 

7.34

 

 

7.58

 

7.56

 

Sierpinski

 

 

6.91

 

 

8.00

8.73

8.52

6.89

7.33

 

8.77

10.60

3-2 Curve

 

 

6.40

7.10

5.90

6.50

7.82

 

6.96

8.86

11.12

11.68

10.17

Koch Triadic

 

 4.70

 

5.32

6.58

5.82

 

6.91

6.13

 

10.11

9.41

9.69

MB Curve

 

4.38

5.57

7.98

6.41
7.11

5.72

7.90

9.33

6.96

7.56

6.97
8.90

8.14

7.76

ZFold

 

 4.46

 

 

5.36

6.50

7.22

7.84

8.01

9.40

8.79

7.98

9.83
10.05

Koch Quadratic

3.24

1.31

4.46

5.49

5.09
7.45

7.96
5.37

8.54

7.24
10.14

11.05
8.55

7.47
8.47

 

10.4

 

Best lobe value over the elevation range of 0 to 15 degrees:

 Second Order

160M
1-2

80M
2-4

40M
4-8

30M
8-12

20M
12-16

17M
16-20

15M
20-24

12M
24-28

10M
28-32

32-36

36-40

40-44

44-50

16 meter Standard

 

 

 5.03

 

4.20

 

2.57

 

 

4.5

 

5.1

 

Sierpinski

 

 

6.91

 

 

6.66

6.92

8.52

-2

3.8

 

3

0.80

3-2 Curve

 

 

6.40

7.10

5.90

5.5

1.5

 

4.1

3.93

11.12

11.68

2

Koch Triadic

 

 4.70

 

-0.80

6.58

5.82

 

6.75

6.13

 

0.5

6.0

7.0

MB Curve

 

4.38

0

7.98

2.0
7.11

5.72

1.1

9.33

6.96

7.56

6.97
8.90

7.24

7.76

ZFold

 

 4.46

 

 

5.36

3.3

5.0

5.0

8.01

9.40

1.0

1.0

1.5
5.5

Koch Quadratic

3.24

1.31

2.14

3.5

3.8
7.45

7.96
5.37

1.0

2.9
10.14

11.05
8.55

2.0
8.47

 

10.4