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Rotatable Log Periodic Antenna 3.8-30MHz

Rev : 02 | Rev date : 23 Aug 2021

The HLR430 is a high-performance rotatable log periodic designed to provide reliable link establishment over short, medium and long distances.


  • Characterised by its high gain performance whilst maintaining an excellent front-to-back ratio, the HLR is capable of providing coverage in excess of 5000kms.
  • The broadband feature enables transmission from 3.8-30MHz and reception from 2-30MHz.
  • A high-performance rotary joint enables continuous rotation with a complete 360º turn achieved in two minutes.
  • The rugged design of the antenna ensures its suitability for cyclonic wind velocities.

Technical features

Electrical Specifications

Frequency Range (Transmit) MHz3.8-30
Frequency Range (Receive) MHz2-30
Gain dBi12.5 Typical (see graph)
Azimuth Radiation PatternDirectional - refer plots
VSWR1.5:1 typical, 2.0:1 maximum from 3.8 to 30MHz
AC Power Supply3 phase 115/ 230VAC, 50/60Hz
AC Power kVA2
Antenna Rotation degrees360 continuous
Maximum Power Rating kW10 (25 PEP)
Input ConnectorN-type (1kW Avg, 4kW PEP)1-5/8" EIA (10kW Avg, 25kW PEP)
Impedance (unbalanced), ohmsΩ50

Mechanical Specifications

Wind Survival Rating (no ice) km/h (mph)285 (177)
Wind Survival Rating with 10mm Radial Ice km/h (mph)160 (99.4)
Wind Load CommentSee Note 1 and 2

Temperature Specifications

Operating Temperature Range °C (°F)-30 to 60 (-22 to 140) See Note 3

Packaging Information

Antenna Packed Weight(approx) kg (lb)3900 (8598)
Mast Packed Weight(approx) kg (lb)4700 (10,362)
1kW Balun Packed Weight kg (lb)4 (8.8) included with antenna
10kW Balun Packed Weight kg (lb)10 (154) Size: 920 x 660 x 570mm (36.2 x 26.0 x 24.4)in
Shipping Commentpacked size of antenna and mast on request

External Document Links


1. Wind ratings are calculated to Australia standard AS1170.2:2011

2. Contact RFS if a higher rating is required

3. Tower top mounting plate and rotational mechanism prequalified to 0°C. Lower temperature available upon request.