The Hi-Tec Range of UHF yagis and folded dipoles spans a Commercial and Professional series.
UHF FOLDED DIPOLES & YAGIS – COMMERCIAL SERIES
The Hi-Tec Commercial Range of UHF yagis and folded dipoles are designed for urban or rural site installations. Being lightweight with small projected surface areas, they can be installed on low cost supports. The coding âFDâ indicates Folded Dipole and âYâ indicates Yagi.
Commercial series antennas are constructed from Grade 6000 series aluminium. Corrosion resistance is increased by silver finished anodising. Elements are 12 x 1.4mm extruded sections, which provide a robust antenna. The boom section is 25 x 25 x 1.7mm square tube, to which the driven element is clamped. The parasitic elements are fitted through the boom and fixed with aluminium rivets.
The nominal feed impedance is 50 Ohms with the matching section sealed within the driven element, eliminating the need for an external balun. A 1m tail of RG58 coax is fitted as standard. See table below for typical bandwidth. All elements are D.C. grounded.
Models CFDU & CY2U to CY12U
Mounting for vertical polarisation is standard with the clamp located at the rear of the boom. Three mounting options are available for clamping to 25mm, 38mm or 48mm outside diameters, with the 25mm clamp supplied as standard. As an alternative the Universal Clamp (CLUV) may be used, providing flexibility in mounting to either vertical or horizontal polarisation.
| Model | Frequency (MHz) | Model | Frequency (MHz) |
| CFDU-T | 400-450 | CY6U-F | 470-495 |
| CFDU-CDF | 450-500 | CY8U-T | 400-430 |
| CY2U-T | 400-430 | CY8U-JL | 430-450 |
| CY2U-JL | 430-450 | CY8U-CD | 450-470 |
| CY2U-CDF | 450-495 | CY8U-F | 470-495 |
| CY3U-T | 400-430 | CY10U-T | 400-430 |
| CY3U-JL | 430-450 | CY10U-JL | 430-450 |
| CY3U-CDF | 450-495 | CY10U-CD | 450-470 |
| CY4U-T | 400-430 | CY10U-F | 470-495 |
| CY4U-JL | 430-450 | CY12U-T | 400-430 |
| CY4U-CDF | 450-495 | CY12U-JL | 430-450 |
| CY6U-T | 400-430 | CY12U-CD | 450-470 |
| CY6U-JL | 430-450 | CY12U-F | 470-495 |
| CY6U-CD | 450-470 | ||
Model specifications of CFDU, CY2U to CY12U
Detailed specifications of all eight models.
Model specifications
CFDU
CY2U
CY3U
CY4U
Number of elements
1
2
3
4
Frequency Range (MHz)
400 – 500 (see bandwidth)
Bandwidth (MHz)
100
50
20
50
Gain (dBd)
0
3
4.5
6.5
Half Power Beamwidth E plan (deg)
N/A
75
67
60
Half Power Beamwidth H plan (deg)
N/A
145
114
85
Front to Back Ratio (dB)
0
10
15
Input Impedance (Ohms)
50
Return loss (dB & VSWR)
<-14dB 1.5:1
Maximum power (W)
100
Cable Type & Length
RF58, 1 Metre
Connector type
None
Boom Diameter (mm)
25 square
Max Element Length (mm)
320
400
400
400
Boom length (mm)
375
300
400
600
Project area (M2)
0.020
0.023
0.030
0.040
Weight (kg)
0.6
0.7
0.8
Mounting Location
Rear
Model specifications
CY6U
CY8U
CY10U
CY12U
Number of elements
6
8
10
12
Frequency range (MHz)
400 – 500 (see bandwidth)
Bandwidth (MHz)
30
30
20
20
Gain (dBd)
8
9
10
11
Half Power Beamwidth E plan (deg)
50
40
35
33
Half Power Beamwidth H plan (deg)
42
43
37
36
Front to back ratio (dB)
20
Input Impedance (Ohms)
50
Return loss (dB & VSWR)
<-14dB 1.5:1
Maximum power (W)
100
Cable Type & Length
RF58, 1 Metre
Connector type
None
Max Element Length (mm)
400
Boom diameter
25mm square
Boom length (mm)
980
1350
1700
1900
Projected area (M2)
0.058
0.076
0.094
0.108
Weight (kg)
1.0
1.2
1.4
1.55
Mounting location
Rear
UHF YAGIS â PROFESSIONAL SERIES
This comprehensive range of Professional Series Yagi antennas are designed for directional point-to-point applications in the UHF bands. They are designed to be used in the most rugged environments and to withstand harsh weather conditions.
All Professional UHF Series Yagis are end mounted and are designed to be used for either vertical or horizontal polarisation. Please specify polarisation when ordering.
Models Y4U, Y6U, Y8U, Y10U & Y12U.
The yagis are constructed from extruded Series 6000 anodised aluminium with the clamps being cast aluminium and fitted with stainless steel hardware. Nominal feed impedance is 50 Ohms with the matching circuit within the sealed driven element. A 1m tail of low loss coaxial cable is fitted with an N plug connector.
The bandwidth is typically 10MHz with a return loss of less than -14dB. All elements are DC grounded. These antennas can be stacked for increased gain.
Optional extras
- Mounting clamps Cross clamp (CLCR) to mount to rigging pipe or the Pole Mount Clamp (CLPM) to mount on a wooden pole.
- Longer coax tail of either RG213, RG58, or low loss RG58 cable.
- Power Divider Use Model PD-2 or PD-4.
Model specifications of Y4U to Y12U
Detailed specifications of all five models.
Model specifications
Y4U
Y6U
Number of elements
4
6
Frequency range (MHz)
400 – 500 (see bandwidth)
Bandwidth (MHz)
10
Gain (dBd)
7.5
8.5
Half power beamwidth E plan (deg)
55
48
Half power beamwidth H plan (deg)
75
60
Front to back ratio (dB)
15
20
Input impedance (Ohms)
50
Return loss (dB & VSWR)
<-14dB 1.5:1
Maximum power (W)
100
Cable type & length
RG58 low loss, 1 metre
Connector type
N plus
Max element length (mm)
380
Boom diameter (mm)
38
Boom length (mm)
0.85
1.2
Projected area (m2)
0.055
0.078
Wind loading, 150 km/h (N)
60
85
Weight (kg)
1.2
1.8
Mounting location
Rear
Model specifications
Y8U
Y10U
Y12U
Number of elements
8
10
12
Frequency range (MHz)
400 – 500 (see bandwidth)
Bandwidth (MHz)
10
30
Gain (dBd)
9.5
11
11.5
Half power beamwidth E plane (deg)
40
36
32
Half power beamwidth H plane (deg)
50
40
36
Front to back ratio (dB)
18
16
Input impedance (Ohms)
50
Return loss (dB & VSWR)
<-14dB 1.5:1
Maximum power (W)
100
Cable type & length
RG58 low loss, 1 metre
Connective type
N plug
Max element length (mm)
380
Boom diameter (mm)
38
Boom length (mm)
1.6
1.9
2.25
Projected aera (m2)
0.103
0.122
0.145
Wind loading, 150km/h (N)
115
135
160
Weight (kg)
2.5
3.0
3.6
Mounting location
Rear