F, MHz

21.0

21.175

21.35

G, dBd

6.88

7.03

7.16

F/B, dB

20.83

21.36

20.83

Z, Ohm

26.7-j3.8

23.3+j1.4

18.3+j8.6

SWR

1:1.4

1:1.09

1:1.4

OD 25-mm

Reflector

Driver

Director 1

Director 2

Length, cm

722

684

658

614

Spacing to Reflector, cm

0

160

340

676

F, MHz

21.0

21.175

21.35

G, dBd

7.74

8.0

8.26

F/B, dB

19.65

32.1

20.49

Z, Ohm

29-j58

24.2+j0.9

17.5+j10.6

SWR

1:1.53

1:1.15

1:1.54

OD 25-mm

Reflector

Driver

Director 1

Director 2

Length, cm

716

674

650

634

Spacing to Reflector, cm

0

210

516

880

F, MHz

21.0

21.175

21.35

G, dBd

8.19

8.39

8.54

F/B, dB

22.99

29.06

21.34

Z, Ohm

29.3-j8.8

29.3+j0.3

31.2+j11

SWR

1:1.39

1:1.02

1:1.4

OD 25-mm

Reflector

Driver

Director 1

Director 2

Director 3

Length, cm

700

675

645

643

622

Spacing to Reflector, cm

0

234

388

657

1022