Hambrew Links

Close VLF Projects

Close 136 kHz Projects

Close 472 kHz Projects

Close 500 kHz Projects

Close Multiband HF Projects

Close 160m Projects

Close 80m Projects

Close 60m Projects

Close 40m Projects

Close 30m Projects

Close 20m Projects

Close 17m Projects

Close 15m Projects

Close 12m Projects

Close 10m Projects

Close 6m Projects

Close 4m Projects

Close VHF Airband

Close 2m Projects

Close 70cm Projects

Close 23cm Projects

Close 13cm Projects

Close 9cm Projects

Close 6cm Projects

Close 3cm Projects

Close 1,25cm Projects

Close EHF Projects

Close Antenna Matches

Close Shack Accessories

Close Power Supplies

Close Test Equipment

Close µController Arduino

Junk Box Circuits

Close Tubes

Close Transistors 2N-Serie

Close Transistors BC-Serie

Close Transistors BD-Serie

Close Transistors BF-Serie

Close IC 74XX-Serie

Close IC 74LSXX-Serie

Close IC 74SXX-Serie

Close IC LM-Serie

Close IC TDA-Serie

HF Propagation


   visitors online


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.

Click to enlargeA 23 elements 23cm yagi antenna by PA4DAN
I have been looking around for antennas for a while for 23cm ATV reception. The design of the antenna is very straight forward. It's a boom made of aluminium with the elements 'floating' above it on plastic isolators.

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 ...

Click to enlargeA quad stacked double-quad by PA4DAN
A while ago I tried to receive ATV-signals with a single double-quad antenna. The antenna performed very good compared to a simple groundplane antenna. But signals were still too weak to really make a picture out of it, so I started experimenting with stacking more than one double-quad to get a higher gain.

Click to enlargeAlford slot antenne voor 23 en 13 cm band door PA3CRX
Deze antenne is een horizontaal gepolariseerde rondstraler. De gain is niet erg groot (de 13 cm versie is gemeten in 2010 door de afdeling Meppel van de Veron met 2,35 dBi). Het stralingsdiagram is bijna rond, met een voorkeurdrichting aan de kant van de sleuf. Of de antenne naast de mast is geplaatst of er boven uit steekt bleek niet uit te maken.

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.

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.

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.

Click to enlargeDoppelquad antennes voor de 24 cm. band door PI6ATC
Als eenvoudige beginnersantenne of voor iemand die voldoende sterke signalen kan ontvangen is de dubbelquad (in het Duits 'Doppelquad') geschikt. De openingshoek is royaal genoeg om 'globaal' uit te richten.

Click to enlargeDubbel acht antenne voor 23 cm. door PI6ATC
Bij een dubbel acht antenne (in het Duits 'Doppel Acht') wordt het concept van de doppelquad verder doorgevoerd: in plaats van de quad elementen tegenover het voedingspunt te sluiten worden ook hier quad elementen (in tegenfase) aangesloten.

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.

Click to enlargeHB9CV-in-a-box antenna for 23cm by PA3HCM
The HB9CV has been a popular antenna for decades, especially on the 2m band where it is commonly used for direction finding (foxhunt). Others create arrays of HB9CV antennas for DXing. Since I needed a simple antenna for 23cm (to uplink to the local ATV repeater PI6ATV) I thought it would be nice to use this HB9CV design.

Click to enlargeJednoduchá anténa OK2KKW pro pásmo 1296 MHz napsáno OK1VPZ
Tuto anténu jsme vyvinuli za přispění OK1ANQ již v roce 1996. Účelem bylo vyvinout anténu, která by se dala používat na pracovišti 23 cm během závodů v případě, že by byla upevněna na stejném stožáru jako 70 cm.

Click to enlargeLog periodic Antenna voor 23, 13 en 9 cm. door PI6ATC
De LPA is gebouwd overeenkomstig een ontwerp van DC8CE. Als materiaal voor de open lijn (de 'dubbele boom') is 6 mm rond buismateriaal gebruikt.

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.

Quick and Cheap Omni Antenna for 1296 MHz by W1GHZ
The sketch in the article has dimensions for 1.7 GHz and uses 0.086 inch semi-rigid coax. I scaled the dimensions to 1296 MHz and found a piece of 0.141 inch semi-rigid coax with an SMA connector on one end.

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.

Click to enlargeTri-Band Ring-straaler door PE1RKM
Ik heb in 2005 een nieuwe mast geplaatst. Ik wou hierin een antenne plaatsen, waarmee ik zoveel mogelijk SHF banden mee kan bestrijken, en niet onbelangrijk met ook nog een goede versterking.

Creation date : 05/09/2007 @ 21:14
Last update : 06/12/2020 @ 13:26
Category : 23cm Projects
Page read 39501 times

Print the article Print the article

Google Ads

^ Top ^