HF Antennas R&S®HL451 Log-Periodic HF Antenna

40 Rohde & Schwarz HF – VHF/UHF – SHF Antennas | Catalog 2017/2018

R&S®HL451 Log-Periodic HF Antenna2 MHz to 30 MHz

Transmission and reception of horizontally polarized waves over medium and long distances

The compact, rotatable R&S®HL451 log-periodic HF  antenna can be used for transmission and reception of horizontally polarized waves.

The antenna’s transmission frequency range from 5 MHz to 30 MHz makes it particularly suitable for communications over medium and long distances. Reception is possible from 2 MHz so that all distances can be covered.

The antenna has been optimized for small size, low weight and minimum maintenance.

Key facts ❙ Reception from 2 MHz ❙ Transmission from 5 MHz ❙ Unshortened half-wave elements for high gain despite extremely small size

❙ Easy and quick assembly ❙ Low maintenance ❙ Suitable for roof mounting

Antennas2017_2018_cat_en_0758-0368-42_v0800.indb 40 24.07.2017 13:19:09

0 2 4 6 8

Azimuth (typical)

90°60°

30°

0°–4 0 2 4 6 8 10 12 14

25 MHz90°

60°

30°

0°–4 0 2 4 6 8 10 12 14

20 MHz90°

60°

30°

0°–4 0 2 4 6 8 10 12 14

30 MHz

90°60°

30°

0°–4 0 2 4 6 8 10 12 14

15 MHz90°

60°

30°

0°–4 0 2 4 6 8 10 12 14

10 MHz90°

60°

30°

0°–4 0 2 4 6 8 10 12 14

7.5 MHz

0°–4 10 12 14

30°

–30°

Gain in dBi

Gain

in d

Bi

Frequency in MHz

16

12

8

4

0

–4

–8

2 3 4 5 6 7 8 10 20 30

15 m mast30 m mast

1

2

3

4

5

6

7

8

9

10

11

12

13

10 kHz 1.5 10 100 MHz 1 1.3 GHz 10 18 26.5 40

HF Antennas R&S®HL451 Log-Periodic HF Antenna

Rohde & Schwarz HF – VHF/UHF – SHF Antennas | Catalog 2017/2018 41

Ordering information Type Order No.Log-Periodic HF Antenna R&S®HL451 0733.8507.02

Recommended extras

Lattice Mast, length: 15 m (standard) R&S®KM451B2 4028.3400.02

Lattice Mast, length: 10 m (for roof mounting) R&S®KM451B1 4028.3351.02

Hazard Light R&S®KM451F1 4028.3500.02

Antenna Rotator R&S®RD130 4059.8503.02

Rotary Joint/Adaption Set R&S®RD008Z1 0720.6400.02

Control Unit R&S®GB130 4059.8755.02

Set of Cables (connecting R&S®GB130 to R&S®RD130, lengths: 50/80/120/200 m) R&S®GK130 4059.8855.0x(x = 2/3/4/5)

Other configurations on request.

Max. wind speed 180 km/h (without ice deposit)

Connector N female

MTBF > 100 000 h

Operating temperature range –30 °C to +50 °C

Dimensions of antenna array (W × L)

approx. 16 m × 15 m (53 ft × 49 ft)

Weight of antenna array approx. 260 kg (573 lb)

SpecificationsFrequency range

Reception 2 MHz to 30 MHz

Transmission 5 MHz to 30 MHz

Polarization linear/horizontal

Input impedance 50 Ω

VSWR ≤ 2 (5 MHz to 30 MHz)

Max. input power 1 kW CW/2 kW PEP

Gain (on 15 m mast)

5 MHz to 30 MHz 6 dBi to 12.5 dBi

Typical gain

Typical radiation patterns on a 15 m mast

Antennas2017_2018_cat_en_0758-0368-42_v0800.indb 41 24.07.2017 13:19:10