VHF/UHF LFA-Yagis

2m/144MHz LFA Yagis


2m Directional Antennas

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
Elementi 5 7 8 9 11 13 16
Guadagno [dBi] 11,12 12,81 13,29 14,16 15,29 16,04 17,45
Rapporto anteriore/indietro [db] 19,76 22,44 25,69 24,13 28,59 26,4 33,7
ROS ≤ 1,4
Impedanza 50Ω
Potenza mass. 5000 W
Lunghezza boom 1,82 2,95 3,77 4,50 6,15 7,90 10,92 m
Mass. Velocità di vento ≤200 ≤160 km/h
Peso 1,8 2,1 3,1 4,5 6,2 7,2 9,2 kg
Montaggio prima l'albero No
Connettore Morsetto vite
Ordine No. 17740.V-05 17740.V-07 17740.V-08 17740.V-09 17740.V-11 17740.V-13 17740.V-16
  99.00 € Ordina 137.00 € Ordina 143.00 € Ordina 182.00 € Ordina 226.50 € Ordina 269.00 € Ordina 311.00 € Ordina

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
Elementi 16+16 11+11
Gamma di frequenze 144.0 - 144.5 MHz
Guadagno 17.54 dBi 15.24 dBi
Rapporto anteriore/indietro 34.42 dB 38.78 dB
ROS 1,2:1 - 1,3:1 1,1:1 - 1,2:1
Impedanza 50 Ω
Potenza mass. 10 kW*
Lunghezza boom 11.17m 6.44m
Raggio mass. di rotatzione 5.60m 3.31m
Mass. Velocità di vento ≥ 160 km/h
Peso 20 Kg 21 Kg
Montaggio prima l'albero No
Connettore Morsetto vite
Grandezza packaging 17 x 11 x 255 17 x 11 x 255 cm
Ordine No. 17740.VX-32 17740.VX-22
396.00 € Ordina 330.00 € Ordina

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
Elementi 15 18 23 30
Guadagno 15,69 18,01 19,15 20,45 dBi
Rapporto anteriore/indietro 32,87 42,32 37,48 44,32 dB
ROS ≤2
Impedanza 50Ω
Potenza mass. 5000 W
Lunghezza boom 3,22 4,30 5,90 8,25 m
Mass. Velocità di vento ≤200 ≤160 km/h
Peso 3,8 4,1 4,9 6,9 kg
Montaggio prima l'albero No
Connettore Morsetto vite
Ordine No. 17740.U-15 17740.U-18 17740.U-23 17740.U-30
  146.00 € Ordina 176.00 € Ordina 246.00 € Ordina 275.00 € Ordina

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.

Ordine No.
ZG-432-14 Eantenna 432LFA14 Yagi 70cm 14ele 105.00 € Ordina
Info sui costi di spedizione

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
Gamma di frequenze [MHz] 144-146 432-440 144-146 432-440
Elementi 4 5 5 8
Guadagno 9,35 10,7 10,8 11,0 dBi
Rapporto anteriore/indietro 11,7 9,7 18,7 15,4 dB
ROS ≤1,5
Impedanza 50 Ω
Potenza mass. 500 W
Lunghezza boom 1,20 1,51 m
Montaggio prima l'albero No
Connettore Morsetto vite
Peso 1,25 1,37 kg
Ordine No. 17740.D4-5 17740.D5-8
  69.00 € Ordina 83.00 € Ordina

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
Gamma di frequenze 50-51 70-70,5 144-146 MHz
Elementi 2 2 3
Guadagno 6,7 6,5 7,7 dBi
Rapporto anteriore/indietro 8,6 11 10,8 dB
ROS ≤1,3
Impedanza 50 Ω
Potenza mass. 500 W
Lunghezza boom 1,25 m
Montaggio prima l'albero No
Connettore Morsetto vite
Peso 1,82 kg
Ordine No. 17740.T2-2-3
  121.00 € Ordina

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
Elementi 3 4 5 5 6 7 8
Guadagno 8,63 9,36 10,78 10,61 12,33 12,89 14,10 dBi
Rapporto anteriore/indietro 20,79 23,46 26,49 24,83 22,6 32,89 28,95 dB
ROS ≤ 1,04
Impedanza 50 Ω
Potenza mass. 5000 W
Lunghezza boom 1,95 3,00 3,95 4,48 7,30 9,40 12,58 m
Raggio mass. di rotatzione 1,40 1,55 2,49 2,30 3,70 4,75 6,95 m
Mass. Velocità di vento ≤200 ≤160 130 km/h
Peso 3,0 4,0 4,9 5,4 9,0 9,5 17,0 kg
Montaggio prima l'albero No
Connettore Morsetto vite
Ordine No. 17740.6-3 17740.6-4 17740.6-5S 17740.6-5 17740.6-6XL 17740.6-7 17740.6-8
  139.00 € Ordina 176.00 € Ordina 209.00 € Ordina 209.00 € Ordina 352.00 € Ordina 418.00 € Ordina 555.00 € Ordina