JI1FGX/DU9 Mindanao, Philippines Amateur Radio Diary IOTA OC-130
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Access until yesterday
Introduction. 【【Lily Diary]
Diary of Life in Mindanao

11/12/16 Flooding in Mindanao
11/12/10 examination hall
11/11/22 DW8BXU to appear in CQ magazine
11/11/18 Auto repair shop opened
11/10/16 WJST JT65A mode
11/10/15 CQ de DW8BXU
Car Repair
11/10/14 Aligned measuring instruments
11/09/23 DW8BXU at 21MHz in Europe
11/09/20 Car repair and rice paddies
11/09/01 Europe at 14MHz for a long time.
11/08/30 Delivered radio equipment
11/08/21 Prepared for opening of auto repair shop
11/08/20 WSJT9 Receiving Edition
11/08/13 Automobile repair shop
11/08/06 EME 17-elec. antenna fabrication
11/08/06 New light vehicle repair
11/08/04 New light car
11/07/29 EME 17-elec. antenna fabrication
11/07/28 private automobile mechanic
11/07/23 Gigi's CQ
11/07/19 EME Antenna Considerations
11/07/12 Optira's Dynamo
11/07/10 EME Antenna Considerations
11/07/06 Passenger car breaks down
11/06/20 Radio Repair
11/06/17 rear monitor
11/06/11 Light truck breakdown
11/06/11 29MHz FM repeater failure
11/06/08 7MHz full size RDP production
11/06/07 21MHz antenna production for EU
11/06/06 I enjoyed DX again today!
11/06/06 Purchased 50 KVA generator
11/06/05 DX
11/06/04 Wireless Shop
11/06/03 parts box
11/06/02 Phonepatch using a cell phone, part 2
11/05/30 Phonepatch with cell phone
11/05/29 Our breaker room
11/05/26 Samway DXV500Z arrives
11/05/22 ONAIR for DW8BXU
11/05/21 7MHz full-size dipole
11/05/14 Buy Hyundai Starex
11/05/13 Buy Linear DXV500Z
11/05/13 Backyard construction
11/05/12 Fawn Patch Consideration
11/05/09 About DX8FAR
11/05/07 DX8FAR restart
11/05/07 X520H repair
11/05/06 Radio Shop
11/05/01 Pole tower collapses
11/04/30 DX8FAR repeater begins operation
11/04/29 DX8FAR uplink construction
11/04/28 DX8FAR uplink construction
11/04/25 29MHz DX8FAR beacon
11/04/23 29MHz DX8FAR Repeater
11/04/22 Backyard construction
11/04/21 Antenna installation for 29MHz repeater
11/04/19 Location of 29MHz Repeater
11/04/18 Hamvention in Bohol
11/04/09 Light truck repair
11/04/02 DW8BXU debuted at 21MHz
11/04/01 29MHz Repeater Modification
11/03/31 Call Gigi DW8BXU
11/03/28 Car Repair
11/03/23 29MHz repeater antenna fabrication
11/03/19 Tools
11/03/15 Arrival of 29MHz repeater equipment
11/03/14 FM Broadcast Commercials
11/03/13 Now a KIA truck breaks down.
11/03/13 Repair of light vehicles
11/03/07 Denyo Generator
11/03/06 DX8FAR Mindanao 29MHz Repeater and Advance Notice
11/03/04 NTC in Cebu Island
11/03/01 Life Membership in PARA
11/02/21 Failure of STANDARD C150
11/02/20 Oscilloscope blew smoke.
11/02/11 SWR at 7MHz is wrong.
11/02/04 Truck Repair
11/01/27 TV antenna sequel
11/01/18 Notice, 29MHz Repetitories
11/01/17 Light truck brake repair
11/01/15 Light truck repair
11/01/08 Business is still going on today
11/01/06 Buy a truck
JI1FGX/DU9Antenna study for EME（2011/07/10)
I heard about EME on twitter, and then JM1WBB Seki told me about specific antennas and I decided to consider it!

The following is a list of
http://www.qsl.net/dk7zb/start1.htm　
Antennas featured in
(Both the data and the photo of the antenna are from the website)

Element-lengths (Rad 12mm), updated data 04/2010

The given length of the radiator The given length of the radiator element is from tip to tip, including 10mm spacing for the insulated part. The given length of the radiator element is from tip to tip, including 10mm spacing for the insulated part.

Gain 13,2 dBd F/B 24 dB

Element-positions

Diam. Ref Rad D 1 D 2 D 3 D 4 D 5 D 6 D 7 D 8
10 mm 1011 mm 964 mm 946 mm 911 mm 898 mm 884 mm 877 mm 871 mm 881 mm 866 mm
3/8" 1012 mm 965 mm 948 mm 913 mm 900 mm 886 mm 879 mm 873 mm 883 mm 868 mm
8 mm 1014 mm 965 mm 956 mm 918 mm 905 mm 892 mm 885 mm 879 mm 889 mm 874 mm
6 mm 1016 mm 966 mm 955 mm 925 mm 913 mm 900 mm 894 mm 888 mm 897 mm 883 mm
5 mm 1018 mm 967 mm 961 mm 931 mm 919 mm 906 mm 900 mm 894 mm 903 mm 889 mm

Ref Rad D 1 D 2 D 3 D 4 D 5 D 6 D 7 D 8
0 mm 415 mm 670 mm 1225 mm 1915 mm 2725 mm 3575 mm 4440 mm 5300 mm 5980 mm
Redesign the antenna with the usual 50 ohm feed based on the data.
144.10MHz 10-element yagi antenna

The result was an antenna stand-alone gain of 18.8dB and F/B of 24.2dB!

Is this practical?
 The reason it's vertically polarized is because it's still the 5EL Yagi I designed back in the day.
SWR
element data
This is the antenna with horizontal polarization
Beam pattern with horizontal polarization
I put the designed antenna up vertically.
Why is the gain going down?
Influence of the earth?
Beam pattern when standing vertically
Data at the time of horizontal beam and horizontal direction

10ele YAGI 144MHz EME
*
141.10
*** wire ***
10
0.0, -0.498, 0.0, 0.0, 0.498, 0.0, 0.004531, 0
-0.464, -0.5145, 0.0, -0.464, 0.5145, 0.0, 0.004531, 0
0.202, -0.4705, 0.0, 0.202, 0.4705, 0.0, 0.004531, 0
0.721, -0.462, 0.0, 0.721, 0.462, 0.0, 0.004531, 0
1.418, -0.4525, 0.0, 1.418, 0.4525, 0.0, 0.004531, 0
2.256, -0.448, 0.0, 2.256, 0.448, 0.0, 0.004531, 0
3.101, -0.4395, 0.0, 3.101, 0.4395, 0.0, 0.004531, 0
3.966, -0.438, 0.0, 3.966, 0.438, 0.0, 0.004531, 0
4.816, -0.442, 0.0, 4.816, 0.442, 0.0, 0.004531, 0
5.516, -0.436, 0.0, 5.516, 0.436, 0.0, 0.004531, 0
*** Power supply point ***
1, 1
w1c, 0.0, 1.0
*** concentration constant ***
0, 1
*** auto split ***
400, 40, 2.0, 1
*** Computational Environment ***
2, 5.0, 4, 50.0, 120, 60, 0
July 06, 2011   July 12, 2011