Portable Satellite Antenna
Now that I’m more portable, I wanted to do something with amateur satellites again.
I mainly want to do this with the IC-705.
Unfortunately, the IC-705 cannot work full duplex. So we depend on FM satellites.
The IC-705 can work in Split mode. that is, Receive on Band A, and Transmit on Band B.
I have programmed various memory channels in the IC-705, including the ISS Crossband repeater. SO50 and the now very popular TEVEL satellites. By using multiple memory channels for a satellite, it is possible to simulate a kind of Doppler correction.
The beauty of the 705 is the waterfall. You choose the memory channel with the downlink carrier in the middle.
I will publish the memory channels soon.
Now I have made several cross yagis in the past. This all worked fine. Only these antennas always had 2 feed points. For 70cm and for 2m. With a MicroDiplexer this can be combined to 1 connection.
Now I recently came across articles on the net where a 2m moxon is used, coupled with a 70cm yagi.
The advantage of this antenna is its mechanical simplicity, and it has only 1 feed point. Ideal for a Handheld radio, or in this case the IC-705.
STL Files can be downloaded here: MoxonArrowSetV2.stl
The design I used came from M1GEO/G8OCV, they have adapted the design so you can use any 100cm 3.2mm TIG welding rods.
I kept the construction as simple as possible. This means that 2 different parts need to be printed.
Or 3 if you want to add a phone holder mount.
6 Element holders for the reflector/directors.
and 1 dipole holder.
The boom is a standard 19mm PVC pipe.
This boom can be stored in 2 parts with a sock. Easy for transportation.
Also a piece of coax of about 3m.
And the contact parts of a terminal block.
First impression of the finished antenna.
Fixating so it stays put on the boom is done with a small screw.
This way it easy to point towards the satellite while passing by.
Several phone apps use this pinpoint method.
We are sorry that this post was not useful for you!
Let us improve this post!
Tell us how we can improve this post?