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661-4
174-230MHz TV Quadrant Antenna
661 Series

Quadrant antennas provide a cost effective top or side mount TV antenna for omnidirectional coverage in Band III.
Quadrant antennas are ideal for low and medium power single channel Band III TV applications. Coverage is basically omnidirectional and may be altered somewhat by adjustment of the positions of the radiators on the RFS antenna test range.
Each bay comprises two radiating elements to give approximately 3.5dBd gain. Up to six bays are available to meet higher gain needs.
The antenna system may be operated with pressurized or unpressurized feeders.

FEATURES / BENEFITS

  • Designed for high corrosion resistance and long life in harsh environments
  • Includes top mounted hot dip galvanized support pole
  • All solid outer, jacketed cables for high reliability
  • Stainless steel radiators
  • Omnidirectional coverage
  • Horizontal polarization
  • Available in low power (unpressurized) and medium power (pressurized) versions.


661-4

Technical features

Structure

Product LineAntenna TV
Product TypeBand III (High VHF) TV 661-4 Antenna

Electrical Specifications

Frequency Range MHz174 - 230
PolarizationHorizontal
Nominal Gain (Mid-band) dBd9.5
Return Loss dB26 Vision, 23 across channel
Power Rating kW0.25/bay unpressurized
2.5/bay pressurized
Impedance (unbalanced) Ω50

Mechanical Specifications

Number of ChannelsSingle
Input Connector7/8" EIA Flange
Base Diameter mm (in)336 (13-1/4)
Mounting (Standard) mm (in)8 x 20mm (3/4) bolts on 297mm (11-3/4) PCD
Effective Area Front (full antenna) No Ice m² (ft²)2.848 (30.60)
Effective Area Front (full antenna) with 12.5mm(0.5") Radial Ice m² (ft²)2.848 (30.60)
Effective Area Side (full antenna) No Ice m² (ft²)2.693 (29.00)
Effective Area Side (full antenna) 12.5mm (0.5") Radial Ice m² (ft²)2.693 (29.00)
Base Moment kNm (lb-ft)1909
Base Shear kN (lb)606
Design Wind Speed (max) km/h (mph)240 (150)
Pressurization Operational kPa (psi)10 - 25 (1.5 - 3.6)
Pressurization Test kPa (psi)100 (15)
Weight kg (lb)275 (606)

Packaging Information

Shipping Weight, Kg (lb)kg (lb)275 ()

Material

Material - InsulatorsPTFE
Material - Support Pole / MountingGalvanised Steel
Material - RadiatorsStainless Steel


Azimuth Radiation Pattern


Top View

External Document Links

Notes