An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H...
Transcript of An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H...
![Page 1: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/1.jpg)
An Analysis of LRS
VHF/UHF Contest Antenna
SystemsBrian Howie
GM4DIJ
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Current Antennas
• 50 MHz
– Homebrew 9 element Wide Spaced 15m boom
• 70 MHz
– Homebrew 11 element Wide Spaced 15m boom
• 144 MHz
– 4 x M2 19 element
• 432 MHz
– 2 x M2 38 element
• 23cm
– 4x 55element Tonna
![Page 3: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/3.jpg)
50MHz
![Page 4: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/4.jpg)
70MHz
![Page 5: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/5.jpg)
144MHz
![Page 6: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/6.jpg)
144MHz
later that night
![Page 7: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/7.jpg)
70cm
![Page 8: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/8.jpg)
23cm
![Page 9: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/9.jpg)
How do they perform ?
• Antenna beam pattern
– Horizontal – to determine footpint
– Vertical –including ground effects
• Map pattern to show area coverage
• Show Stations worked form Gatehouse
– Shadows and preferred beam direction
![Page 10: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/10.jpg)
50MHz
![Page 11: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/11.jpg)
50MHz
15m agl
![Page 12: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/12.jpg)
Ground Slope
![Page 13: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/13.jpg)
View from Gatehouse
![Page 14: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/14.jpg)
View from Mull of Galloway
![Page 15: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/15.jpg)
50MHz
![Page 16: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/16.jpg)
50MHz
![Page 17: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/17.jpg)
70MHz
![Page 18: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/18.jpg)
70MHz
![Page 19: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/19.jpg)
70MHz
![Page 20: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/20.jpg)
70MHz
![Page 21: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/21.jpg)
144MHz
![Page 22: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/22.jpg)
144MHz
![Page 23: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/23.jpg)
144MHz
![Page 24: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/24.jpg)
144MHz
![Page 25: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/25.jpg)
70cm
![Page 26: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/26.jpg)
70cm
![Page 27: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/27.jpg)
70cm
![Page 28: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/28.jpg)
70cm
![Page 29: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/29.jpg)
23cm
![Page 30: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/30.jpg)
23cm
![Page 31: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/31.jpg)
23cm
![Page 32: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/32.jpg)
Summary
Band Antenna gain dBi BW H deg BW V deg F/B dB
50MHz 9 element Yagi 15.22 32 34 13.98
70MHz 11 element Yagi 15.98 24.5 30 9.2
144MHz 4 x 17 element Yagi 22.37 13.6 13.6 18.45
432MHz 2 x 38 element Yagi 23.7 17 9 26.6
1296MHz 4 x 55 element Yagi 27.83 6 6 31.78
Band Antenna gain dBi Lobe deg
50MHz 9 element Yagi 20.56 5.4
70MHz 11 element Yagi 21.52 3.8
144MHz 4 x 17 element Yagi 28.24 1.2
432MHz 2 x 38 element Yagi 28.98 2
1296MHz 4 x 55 element Yagi 33.38 1.1
Free space
Real ground ( experimenting with tilt might improve performance)
![Page 33: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/33.jpg)
Summary
• 6m beam
– Can be parked at 145 deg +/- 10 most of time
for UK
– Has to be turned if Es encountered
• 4m beam
– Can be parked at 145 +/- 10 deg most of time
for UK
– Has to be turned if Es encountered (rare)
![Page 34: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/34.jpg)
Summary
• 2m beam
– Has to be frequently turned in between 120deg
and 190 deg for UK in ~ 5 deg steps ,80 deg –
120deg for Mainland Europe
• 70cm beam
– Has to be frequently turned in between 120deg
and 190 deg for UK in ~ 8 deg steps ,80 deg –
120deg for Mainland Europe
![Page 35: An Analysis of GM3HAM - Lothians Radio Society · 2016-09-12 · Summary Band Antenna gain dBi BW H deg BW V deg F/B dB 50MHz 9 element Yagi 15.22 32 34 13.98 70MHz 11 element Yagi](https://reader033.fdocuments.in/reader033/viewer/2022041607/5e34d02a43e5bc33885748e7/html5/thumbnails/35.jpg)
Summary
• 23cm
– Has to be frequently turned in between 120deg
and 190 deg for UK in ~ 3 deg steps ,80 deg –
120deg for Mainland Europe
– THIS ANTENNA IS SHARP