HF230L-B
HF basestation loop antenna, NVIS, 2.5 m diameter, 1.6-30 MHz
Tactical Antennas: Tactical and Base Station
Description
The HF230L-B is a compact HF antenna for rapid deployment to create a base
station working from 1.6 to 30 MHz. It is designed to provide superior Near
Vertical Incident Skywave (NVIS) performance at distances from 0 to 500
km and allows continuous communications in ground wave, NVIS and
skywave applications.
The communications characteristics of the antenna are similar to a
wire antenna mounted on a 10 m mast.
The HF230L-B is a direct replacement for existing mast mounted
HF base station antennas with the important advantage of
only requiring a fraction of the time and space to install. The
mounting of the system only takes a few minutes and requires
no special installation equipment.
This new generation HF antenna is difficult to detect because
of its small size and, most importantly, it reduces co-site
interference with other HF and all VHF/UHF whip antennas.
Electrical Specifications
Frequency Range 1.6 - 30 MHz
Impedance 1 to 1000 Ω
50 Ω nominal
Power Rating 400 W PEP and average
Gain - 10 dBi @ 3.5 MHz
- 4 dBi @ 10 MHz
Radiation Pattern Omnidirectional for NVIS
Power Supply 18 - 32 V DC, normally supplied from
Power Amplifier
Connector 10 mm stud for RF
MIL-C-5015, 7 pin for interface to ATU
and supply voltage
Interface The antenna has two digital inputs and
one output, and a RS485 serial port.
Software is then configured depending
on radio system
Mechanical Specifications
Design Copper braided fibreglass collapsible
radiating loop. Feed tower made from
aluminium and fibreglass.
Size Base Plate: 115 x 30 cm
Radiating Loop: 250 cm diameter
Weight approximately 17 kg (without ATU)
Wind Rating 55 m/s = 201 km/h
Finish Anodize, Black
Radiating element covered with black
heatshrink tube
Environmental Test Method: Per MIL-STD-810F
Shock and Vibration: Transportation
Water Resistance: IP67
Temperature Range: - 40°C to + 71°C
Installation see Comrod installation manual
Interface Description
The antenna interfaces directly to the coupler of many popular HF radios. Frequency information is obtained using an
internal frequency counter or received in digital format through an RS485 line. The antenna is fully compatible with Fixed
Frequency, MIL-STD-188-141A ALE and 3G ALE/data modes. The antenna works with systems up to 400 Watts.
The HF230L-B is lightweight and has a low physical
profile that helps reduce antenna placement
problems and has been designed for severe
military environmental conditions.
The antenna includes an easily assembled
fibreglass loop radiating element, a support rod
with spring which gives mechanical support, a low
profile tower unit which adapts the impedance for
high efficiency tuning by the coupler, an interface
cable, an RF cable and a ground strap.
2500
Power Amplifier
2500
RF
Data
The mounting of the antenna is described in the
user manual. The base, as shown, is made up of
the platform for the antenna and the associated
coupler. The hole pattern for the coupler fits several
of the most popular couplers, more info on request.
Other patterns on request.
There are two supports as shown to give stability to
the system. The base plate has telescopic support
arms that can be fixed to ground.
Coupler
Tower
RF
Ground Strap
Power Cable Harness
RF Connection:
M10 with fixing nut
300
Kit List
Kit List Quantity Article Number NATO Codification
Loop Elements 3
Centre Support 1
Side Supports 2
Tower on Mounting Plate
Installation Kit consisting of:
HV Protection Boot
Mounting Bolts, Ground Strap
Cable Harness 1
The information contained herein is for reference only and does not constitute a warranty of performance
1
NATO codification and exact part
number varies according to radio
system.
All specifications are subject to change without notice
Optional Parts
Bag for Radiating Elements 1
Bag for Tower 1
September 2018
Partnered Supplier
sales@eylex.com.au
www.eylex.com.au
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