MY HYBRID ANTENNAS FOR 1296 MHZ

 

As the following data shows, four stacked hybrid antennas, six meter long each, give something closely to 30 dBi what corresponds to a parabolic reflector antenna of 3.0 metres in diameter.

Why the serious hams are always using dishes instead yagi or loop parasitic arrays? Maybe the dish is easier to install and to handle with? Or there are no yagi/quad models enough to choose from.

Anyway, I hope someone will choose one of my models to buid and to share his experience with all of us.

Every model in the Table is made of silverplated copper wire 1.5 mm. This should be the best material: easy to measure, cut and solder, good conductor, protected against weather. Unlike 144 MHz antennas, elements of 23 cm hybrid antennas looks like ridiculously small, therefore precision is a must, specially for yagi elements.

The following photo shows a CuAg oblong element, made by YU7AA, as a part of six meter long oblong antenna. YU7AA is very satisfied with this antenna.

 

The next photo shows an oblong element made for a 70 cm hybrid antenna, just to give idea how it can be built.

 

Here is the table with my hybrid antennas for 1296 MHz. You can click on hyperlink of a particular antenna if you want to see all details for this antenna.

 

ANTENNA

No of
elements

No of
oblong
elements

Ǿ
(mm)

Length
(mm)

Oblong height
(mm)

GAIN
(dB)

TA
(K)

G/T
(dB)

Tlos
(K)

Frequency for SWR=1.5

(MHz)

Lower

Upper

1

QY232001XL2D15

20

15

1.5

1515

60

18.12

217.9

-5.26

5.9

1275

1317

2

QY232401XL2D19

24

19

1.5

1915

60

18.98

216.1

-4.37

6.5

1282

1318

3

QY232801XL2D23

28

23

1.5

2315

60

19.66

216.1

-3.68

6.5

1275

1318

4

QY233201XL3D27

32

27

1.5

2715

60

20.27

215.3

-3.06

6.8

1260

1315

5

QY233601XL3D31

36

31

1.5

3115

60

20.67

215.1

-2.65

6.7

1275

1316

6

QY234201XL3D37

42

37

1.5

3715

60

21.47

215.0

-1.85

6.7

1271

1312

7

QY234601XL3D41

46

41

1.5

4115

60

21.89

214.9

-1.44

6.7

1275

1312

8

QY235501XL3D50

55

50

1.5

5015

60

22.68

213.9

-0.62

7.1

1275

1312

9

QY236001XL3D55

60

55

1.5

5515

60

23.04

214.1

-0.27

7.1

1275

1312.5

10

QY236501XL3D60

65

60

1.5

6015

60

23.39

214.0

+0.09

7.1

1275

1312

 

Note: Maybe you want to build such an antenna with a different diameter of silver plated wire. Please, just send me an e-mail and I will make the wanted design.

GL de Boban, YU7XL