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 Ø1.5 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	21.4	+4.82	6.0	1275	1317
2	QY232401XL2D19	24	19	1.5	1915	60	18.97	21.2	+5.70	6.6	1282	1318
3	QY232801XL2D23	28	23	1.5	2315	60	19.66	21.4	+6.36	6.8	1275	1318
4	QY233201XL3D27	32	27	1.5	2715	60	20.27	21.5	+6.96	7.1	1260	1315
5	QY233601XL3D31	36	31	1.5	3115	60	20.77	21.3	+7.50	7.1	1275	1316
6	QY234201XL3D37	42	37	1.5	3715	60	21.47	21.3	+8.19	7.2	1271	1312
7	QY234601XL3D41	46	41	1.5	4115	60	21.88	21.7	+8.52	6.7	1275	1312
8	QY235001XL3D45	50	45	1.5	4515	60	22.66	21.6	+8.92	7.4	1275	1313
9	QY235501XL3D50	55	50	1.5	5015	60	22.67	21.6	+9.33	7.7	1275	1312
10	QY236001XL3D55	60	55	1.5	5515	60	23.04	21.6	+9.70	7.7	1275	1312.5
11	QY236501XL3D60	65	60	1.5	6015	60	23.35	20.8	+10.16	7.7	1275	1312

Notes:

• Results given with KF2YN correction applied  

• Earth and Sky temperatures taken as agreed in the VE7BQH G/T Table: Tearth=290K and Tsky=10K

• 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