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23cm Projects - Antennas

Click to enlarge23cm Antenna by OK1AYU
I have built this "junkbox" antenna for my first tests on 23cm with the packet node OK0NJ. The original article was published in the Slovak HAM radio magazine Radiozurnal 1/1998. The antenna on this drawing is horizontally polarized. If you need vertical polarization, just turn it 90 degrees.
http://www.qsl.net/ok1ayu/projects/ant23.htm

Click to enlargeA Double Quad Antenna for 1296 MHz by DL5NEG
This antenna is a medium gain directional antenna for mobile (portable) and base station use. I have built it many years ago for mobile operation to check out how good the signal of the ATV Relais DB0SCS is received ...
http://www.herbert-dingfelder.de/?page_id=353

An Inexpensive External GPS Antenna by N7KKQ
If you operate APRS or just need an external antenna for your GPS receiver, here’s one that is easy to build yet offers surprisingly good performance in a compact size. ..., it uses commonly available components and materials.
http://www.arrl.org/files/file/Technology/tis/info/pdf/0210036.pdf

Click to enlargeParabolic Dish Ring Feed by DL4MEA
For illuminating a parabolic dish with small f/D (around 0.4, not critical) a ring feed can be used. Its advantages are a wide illumination in both axis' without a large shadowing of the dish. It offers linear polarisation.
http://www.qsl.net/dl4mea/ringfeed.htm


Creation date : 05/09/2007 @ 21:14
Last update : 17/09/2015 @ 23:15
Category : 23cm Projects
Page read 18139 times


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