VHF/UHF LFA-Yagis

2m/144MHz LFA Yagis


2m Richtantennen

LFA Yagis differs a lot from the traditional Yagi design.

The LFA ("Loop Fed Array") has a rectangular dipole with 1λ length. The dipole lies flat on the boom at the same level as the parasitic elements. The outer sides of the dipole run parallel to the boom and are designed to be exactly inversely phased (±180°).

This way signals eliminate each other on those sides resulting in much reduced side lobes, lower G/T values and a better front to back ratio.
This concept can be applied at almost any boom length. LFA Yagis have 50Ω impedance and get by without lossy transformation.

  144LFA5 144LFA7 144LFA8 144LFA9 144LFA11 144LFA13 144LFA16
Elements 5 7 8 9 11 13 16
Gain [dBi] 11,12 12,81 13,29 14,16 15,29 16,04 17,45
Front/Back ratio [db] 19,76 22,44 25,69 24,13 28,59 26,4 33,7
SWR ≤ 1,4
Impedance 50Ω
Max. Power 5000 W
Boom length 1,82 2,95 3,77 4,50 6,15 7,90 10,92 m
Max. Wind Velocity ≤200 ≤160 km/h
Weight 1,8 2,1 3,1 4,5 6,2 7,2 9,2 kg
Foremast No
Connector Screw terminals
Order No. 17740.V-05 17740.V-07 17740.V-08 17740.V-09 17740.V-11 17740.V-13 17740.V-16
  99.00 € Buy now 137.00 € Buy now 143.00 € Buy now 182.00 € Buy now 226.50 € Buy now 269.00 € Buy now 311.00 € Buy now

New! Cross Yagi (LFA) for 2m

16+16 LFA

Our 2m, 2x16ele LFA crossed yagi attached to a 13m dish at the EME 2014 conference in Pleumeur-Bodou (France). After the QSOs it was a gift and the first prize of a lotery among all attendants of the conference.

16+16 LFA 11+11 LFA
Elements 16+16 11+11
Frequency Range 144.0 - 144.5 MHz
Gain 17.54 dBi 15.24 dBi
Front/Back ratio 34.42 dB 38.78 dB
SWR 1,2:1 - 1,3:1 1,1:1 - 1,2:1
Impedance 50 Ω
Max. Power 10 kW*
Boom length 11.17m 6.44m
Max. rotating radius 5.60m 3.31m
Max. Wind Velocity ≥ 160 km/h
Weight 20 Kg 21 Kg
Foremast No
Connector Screw terminals
Packing size 17 x 11 x 255 17 x 11 x 255 cm
Order No. 17740.VX-32 17740.VX-22
396.00 € Buy now 330.00 € Buy now

70cm/430MHz LFA-Yagis


70cm directional antenna

As with the 2m antennas, 430MHz directional antennas are manufactured according to the LFA concept.

  432LFA15 432LFA18 432LFA23 432LFA30
Elements 15 18 23 30
Gain 15,69 18,01 19,15 20,45 dBi
Front/Back ratio 32,87 42,32 37,48 44,32 dB
SWR ≤2
Impedance 50Ω
Max. Power 5000 W
Boom length 3,22 4,30 5,90 8,25 m
Max. Wind Velocity ≤200 ≤160 km/h
Weight 3,8 4,1 4,9 6,9 kg
Foremast No
Connector Screw terminals
Order No. 17740.U-15 17740.U-18 17740.U-23 17740.U-30
  146.00 € Buy now 176.00 € Buy now 246.00 € Buy now 275.00 € Buy now

Trade Show Exhibit 70cm LFA!

Demo antenna from HamRadio show. Slight 'signs of usage' from the spring washers. Complete with manual and guarantee, of course.

Order No.
ZG-432-14 Eantenna 432LFA14 Yagi 70cm 14ele 105.00 € Buy now
Info freight charges

144MHz/430MHz Duoband directional antennas DK7ZB Design


Duoband directiona antennas

Duoband antennas consist of two monoband antennas that are nested in each other on a single boom. Therefore only one coax cable is required for feeding.

  EA270ZB9 EA270ZB13
Frequency Range [MHz] 144-146 432-440 144-146 432-440
Elements 4 5 5 8
Gain 9,35 10,7 10,8 11,0 dBi
Front/Back ratio 11,7 9,7 18,7 15,4 dB
SWR ≤1,5
Impedance 50 Ω
Max. Power 500 W
Boom length 1,20 1,51 m
Foremast No
Connector Screw terminals
Weight 1,25 1,37 kg
Order No. 17740.D4-5 17740.D5-8
  69.00 € Buy now 83.00 € Buy now

50MHz/70MHz/144MHz directional antenna


50MHz/70MHz/144MHz directional antenna

Cover 3 VHF-bands with only one antenna. All elements are at same level on a common boom. The gaps between elements are design to produce high gain as well as very good F/B ratio. The antenna, built in DK7ZB-design, has a light weighted so that even low-priced TV antenna rotors can turn it without any problems.

  EA642ZB7
Frequency Range 50-51 70-70,5 144-146 MHz
Elements 2 2 3
Gain 6,7 6,5 7,7 dBi
Front/Back ratio 8,6 11 10,8 dB
SWR ≤1,3
Impedance 50 Ω
Max. Power 500 W
Boom length 1,25 m
Foremast No
Connector Screw terminals
Weight 1,82 kg
Order No. 17740.T2-2-3
  121.00 € Buy now

6m/50MHz LFA directional antenna


6m directional antenna

As with the 2m antennas, 50MHz directional antennas are manufactured according to the LFA concept.

  50LFA3 50LFA4 50LFA5S 50LFA5 50LFA6XL 50LFA7 50LFA8
Elements 3 4 5 5 6 7 8
Gain 8,63 9,36 10,78 10,61 12,33 12,89 14,10 dBi
Front/Back ratio 20,79 23,46 26,49 24,83 22,6 32,89 28,95 dB
SWR ≤ 1,04
Impedance 50 Ω
Max. Power 5000 W
Boom length 1,95 3,00 3,95 4,48 7,30 9,40 12,58 m
Max. rotating radius 1,40 1,55 2,49 2,30 3,70 4,75 6,95 m
Max. Wind Velocity ≤200 ≤160 130 km/h
Weight 3,0 4,0 4,9 5,4 9,0 9,5 17,0 kg
Foremast No
Connector Screw terminals
Order No. 17740.6-3 17740.6-4 17740.6-5S 17740.6-5 17740.6-6XL 17740.6-7 17740.6-8
  139.00 € Buy now 176.00 € Buy now 209.00 € Buy now 209.00 € Buy now 352.00 € Buy now 418.00 € Buy now 555.00 € Buy now