OWA Yagis

G0KSC SC0609L 9el OWA Yagi for 50Mhz

Gain: 13.93 dBi
F/B: 28.12 dB
Elements: 9

Specifications

Performance

Gain: 13.93 dBi
Front-to-back: 28.12 dB
Elements: 9
Impedance: 50 Ω

Dimensions

Element dimensions

Element dimensions (parsed from legacy body — check before publishing)

Element	Position	Note
Ref	0 mm	parsed from legacy body — confirm position vs length
D1	1012 mm	parsed from legacy body — confirm position vs length
D2	1946 mm	parsed from legacy body — confirm position vs length
D3	3588 mm	parsed from legacy body — confirm position vs length
D4	5562 mm	parsed from legacy body — confirm position vs length
D5	7750 mm	parsed from legacy body — confirm position vs length
D6	10154 mm	parsed from legacy body — confirm position vs length
D7	12234 mm	parsed from legacy body — confirm position vs length
Ref	1477 mm	parsed from legacy body — confirm position vs length
Driven	1461 mm	parsed from legacy body — confirm position vs length
D1	1391.5 mm	parsed from legacy body — confirm position vs length
D2	1379 mm	parsed from legacy body — confirm position vs length
D3	1346 mm	parsed from legacy body — confirm position vs length
D4	1322 mm	parsed from legacy body — confirm position vs length
D5	1302 mm	parsed from legacy body — confirm position vs length
D6	1278 mm	parsed from legacy body — confirm position vs length
D7	1272 mm	parsed from legacy body — confirm position vs length
Ref	0 mm	parsed from legacy body — confirm position vs length
D1	1012 mm	parsed from legacy body — confirm position vs length
D2	1946 mm	parsed from legacy body — confirm position vs length
D3	3588 mm	parsed from legacy body — confirm position vs length
D4	5562 mm	parsed from legacy body — confirm position vs length
D5	7750 mm	parsed from legacy body — confirm position vs length
D6	10154 mm	parsed from legacy body — confirm position vs length
D7	12234 mm	parsed from legacy body — confirm position vs length
Ref	1477.5 mm	parsed from legacy body — confirm position vs length
Driven	1461.5 mm	parsed from legacy body — confirm position vs length
D1	1392 mm	parsed from legacy body — confirm position vs length
D2	1379.5 mm	parsed from legacy body — confirm position vs length
D3	1346.5 mm	parsed from legacy body — confirm position vs length
D4	1322.5 mm	parsed from legacy body — confirm position vs length
D5	1302.5 mm	parsed from legacy body — confirm position vs length
D6	1278.5 mm	parsed from legacy body — confirm position vs length
D7	1272.5 mm	parsed from legacy body — confirm position vs length

Modelled performance

Plots

About this design

G0KSC SC0609L 9el 50Mhz Yagi Antenna with a 12.2 Metre Length Boom

This antenna has been redesigned and represents what i believe to the the 'ideal boom length' for an OWA direct feed 50Ohm Yagi. This can be seen in the model in the super flat SWR, the high levels of F/B ratio along with the excellent gain and pattern.

The model below is designed with 12.7mm / 1/2 inch elements and also a 12mm version below . If you require a version of this antenna with another diameter wire, Email me and I will remodel. It is NOT POSSIBLE to simply resize the elements when using a VERY different diameter wire and get the best performance possible. Element positions also need to change for the ideal antenna to be achieved again. Please read all the way down this page, there are other versions of this antenna using tapered elements too. As I have more requests, I will remodel in other element diameters and tapers and publish those too.

Enjoy the antenna and if you build, Please Send me photos!