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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 enlargeCircular-waveguide horn for 23cm by S53MV
Various-size coffee cans usually make useful linearly-polarized horns for 1.7GHz and 2.4GHz. A weatherproof waveguide horn for 1.3GHz (23cm) is a little bit too large for practical cans and will probably have to be purpose-built from aluminum sheet.
http://lea.hamradio.si/~s53mv/wumca/horn.html

Click to enlargeDevelopment of a 23cm patch antenna by G6GVI
Looking for a robust design for a portable antenna to use with my new DJ-G7E, I decided to try a microstrip patch. This is just a precisely-shaped conductive plate suspended above a ground-plane; but by using PCB techniques, this becomes a simple rectangular "flat-panel" antenna.
https://www.qsl.net/g6gvi/23cmpatch.html

Click to enlargeHB9CV Antenne für 23cm by DH2PA
Um einen im Aufbau befindlichen 23cm Transverter zu testen, benötigte ich eine kleine, leichte Antenne, die ohne Halterung, nur durch das Semi-Rigid am Transverter befestigt werden kann.
http://dh2pa.darc.de/hb9cv.html

Click to enlargeHB9CV-in-a-box antenna for 23cm by PA3HCMhttp://www.pa3hcm.nl/?p=450

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

Click to enlargeShort DL6WU yagi for 23cm by PA3HCM
In the previous Winter I built a HB9CV-in-a-box for 23cm for my uplink to the local ATV repeater PI6ATV. Although this antenna works nicely, its gain just isn’t enough when their 23cm preamp is broken (which, unfortunately, is the case most of the time). To achieve a more steady uplink, I decided to build an antenna with a bit more gain, at least 6 dB extra compared to the HB9CV. A short yagi should make this possible.
http://www.pa3hcm.nl/?p=650


Creation date : 05/09/2007 @ 21:14
Last update : 14/10/2018 @ 19:34
Category : 23cm Projects
Page read 19524 times


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