7arrays / Engineering
  Last Update Nov. 14th 2022


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Custom Designs and Engineering

with more than 20 publications in Dubus Magazine and other print media on antenna related topics like Boom Correction, stacking and plotting I have shown my capacities on this field. For this I make extensive use of EZNEC and 4nec2 simulation tools, a self programmed Yagi Element Configuration Tool and more. Using adequate Analysers like TR 1300 by Planar - OZBOR or Agilent 8594 E in house and sharpening my skills in regular exchange with others professionals at TGN Technology Ltd. or WiMo I am well trained to meet your demands for Research and Development for top range gear on VHF/UHF bands.

What I can do for you is producing full antenna simulation analysis, antenna designs to your specification, assisting in setting up your pilot antenna design with boom correction factors and CAD drawings for production.




References please?


DIN 7/16 cable bushing bracket for 40 x 40 mm boom & confectioning:

LCF 12-50J, Spinner BN bushing, adhesive lined heat shrink tube

Trimmed 2 wavelength patch line for 28 MHz - 3 kW, LCF 12-50J, DIN 7/16


Antennas: My NEC Model

and the real factory build

Photo: H. Klüver

Photo: H. Klüver: T.G.N LTD - Octenna 7; G/T optimised, 470-690 MHz, LTE Cut Off


My NEC Model

and the real factory build

Photo: T.G.N LTD - DIGYA43MK2; G/T optimised, 470-690 MHz, LTE Cut Off


Photo: DL1TGN @ T.G.N LTD - 6 x 8 elem. FM DX Yagi; F/R optimised, 88-108 MHz, 4.38 m boom

Freq.   Gain F/B
88 MHz   10.0 dBi 26 dB
94 MHz   10.9 dBi 36 dB
102 MHz   12.2 dBi 36 dB
108 MHz   11.1 dBi 29 dB



6 x 18 elem. FM DX Yagi; F/R optimised, 88-108 MHz, boom 4.2 m

6 x 18 elem. FM DX Yagi; F/R optimised, 88-108 MHz, boom 4.2 m

3D CAD Drawing for production (DG7YBN)

3D CAD Drawing for production (DG7YBN)

Freq.   Gain F/B
88 MHz   11.1 dBi 26 dB
90 MHz   11.4 dBi 28 dB
94 MHz   11.9 dBi > 40 dB
98 MHz   12.4 dBi 32 dB
102 MHz   12.7 dBi 27 dB
108 MHz   11.9 dBi 27 dB



Short version: 6 x 11 elem. FM DX Yagi, boom 2.8 m

Freq.   Gain F/B
88 MHz   10.0 dBi 26 dB
90 MHz   10.3 dBi 31 dB
94 MHz   10.7 dBi 37 dB
98 MHz   11.1 dBi 28 dB
102 MHz   11.3 dBi 26 dB
108 MHz   10.0 dBi 25 dB




Compact VHF TV Band 1 and OIRT Yagi with bent Dipole (K6STI-style)
Boom 2.08 m, Gain ~ 4 ... 8 dBi (45 ... 82 MHz)



Interlaced 28 MHz Quad / 50 MHz Yagi, Boom 9.50 m
Simulation of antennas and adaption to interlaced combination.

Freq.   Gain F/B
28.2 MHz   11.3 dBi 23.8 dB
28.5 MHz   11.4 dBi 23.8 dB
50.2 MHz   13.0 dBi >35 dB





• TGN Technology - DVB-T Yagi Range Design, Boom Correction and RF Compliant Realisation of Mechanical Design

• WiMo - VHF/UHF Yagis by YU7EF: Boom Correction, Balun Design and Building Details (production ran out)

• Various Publications in Dubus, Practical Wireless and other magazines on Antenna G/T, designs and correction factors for building