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628 Series
174-240MHz Sidemount DAB/TV Dipole Arrays

PRODUCT DESCRIPTION

These vertically polarized antennas for TV and DAB broadcasting applications are intended for use where low wind loadings are required. They are designed to be side mounted to a pole or tower leg and optional mounting brackets are available for this purpose.
The 628 series are fabricated from stainless steel and will handle up to 2.5kW input power per bay for standard models. Higher power ratings are available on request.
Feed-point radomes are standard for the 628 series.
Multiple element arrays are supplied as a complete package including power dividers and distribution cables. An optional input tuner ensures optimum VSWR performance after the installation as it enables the effects of tower steelwork to be eliminated.
The 628 series can be supplied with up to 6 or more bays as required.

FEATURES / BENEFITS

  • Rugged construction for maximum corrosion protection
  • Broadband operation
  • Multi-channel use
  • Optional pressurization of the power divider and cable network
  • Low wind load to minimize tower or mast costs
  • Vertical polarization
  • Temperature range -40 to +60°C available

TECHNICAL FEATURES

Details 

Product Type   Band III (High VHF) TV/DAB Panel Array 628

Electrical Specifications 

Antenna Type   Broadband VHF Dipole Antenna
Operating Frequency Range MHz 174-240
Polarization   Vertical
Azimuth Radiation Pattern   Omnioid
Impedance Ohms  50 

Mechanical Specifications 

Material   Stainless Steel
Pressurization  

Non-pressurized as standard.
Option to pressurize feed network

Model Number Specifications 

Antenna Model   628-1 628-2 628-4 628-6
Number of Bays   1 2 4 6
Nominal Gain (Mid-band) dBd 1.9 5.1 8.2 10.0
Azimuth Radiation Pattern [note 1] Omnioid - refer plot
Return Loss dB 17 20
Power Rating kW [note 2] 2.5 5 10 15
Input Connector   7-16 DIN 7/8" EIA Flange
or 1-5/8" EIA Flange
Dimensions (Height or Length) cm (in) 69.5 (27.4) typical 210 (82.6) 460 (181) 769.5 (303) typical
Dimensions (Width) cm (in) 6 (2.4)
Dimensions (Depth) cm (in) 100.8 (39.7)
Mounting (Standard) mm (in) Clamping Dia. 43 - 76 (1.7 - 3)
Mounting Type   Side
Effective Area Front (Full Antenna) No Ice

m2 (ft2)
[note 3,4,5]

0.11 (1.18) 0.22 (2.37) 0.44 (4.74) 0.66 (7.10)
Wind Load@ 50 m/s Front kN (lb)
[note 3,4,5]
0.13 (30) 0.26 (60) 0.52 (120) 0.78 (180)
Weight kg (lb) 8 (18) 30 (66) 65 (143) 105 (231)


Azimuth Pattern


628 pole mounted array typical spacing

External Document Links

Notes

Note 1 When antenna is mounted on a mast/tower with a face width of less than 150mm.
Note 2 Input power is limited to 5 kW maximum if a 7/8" connector is used.
Note 3 Connecting cables are considered shielded by the tower and are not included in calculations. Allow 0.03 metre squared per metre length if not shielded. Does not apply to the 628-1 model.
Note 4 Power divider is considered shielded by the tower and not included. Allow 0.13 metre squared if not shielded. Does not apply to the 628-1 model.
Note 5 Calculated in accordance with AS1170-1989, Part 2: "SAA Loading Code - Wind Forces".