Articles published in:
A Reprint by Permission of antenneX Online Magazine http://www.antennex.com
antenneX No.151, November 2009.
Coaxial Cable Feeder Influence on Four Stacked Yagi Antennas Array NEW!
Cable_inf_on_ant_array.pdf (2.1 MB)
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antenneX No.150, October 2009.
Coaxial Cable Feeder Influence on Yagi Antenna - Part 2
Coax_Infl_yagi_2.pdf
(1.7 MB)
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antenneX No.149, September 2009.
Coaxial Cable Feeder Influence on Yagi Antenna
coax_Infl_yagi.pdf (1.6
MB)
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antenneX No.148, August 2009.
Boom Distance Influence on Yagi Antenna
boomdistyagi.pdf (1.7
MB)
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antenneX No.147, July 2009.
Triple Folded Dipole Feed for Yagi Antenna
3fdf_yagi_feed.pdf
(413 kB)
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antenneX No.146, June 2009.
Boom Radius Influence on Yagi Antenna
boomradyag.pdf
(1718 kB)
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antenneX No.145, May 2009.
Boom Influence on Yagi Antenna
boom_yagi.pdf (687
kB)
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antenneX No.140, Dec 2008.
Array of Inverted Amos Antennas
InvAmosArray.pdf
(318 kB)
Built by: Napoleón J. Rodríguez La Torre - Perú
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antenneX No.139, Nov 2008.
Yagi Antenna Design Sensitivity in Practice
yagi_sens_pract.pdf
(385 kB)
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antenneX No.138, Oct 2008.
Yagi Antenna Design Sensitivity
yagi_design_sens.pdf
(473 kB)
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antenneX No.137, Sep 2008.
Yagi Antenna Improvement Thirty-Year Old Dead End?
yagi_old.pdf (292 kB)
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antenneX No.136, Aug 2008.
Performances of Wet Yagi Antennas
wetantenas.pdf (450 kB)
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antenneX No.135, Jul 2008.
Yagi Antenna Q factor
yagi_q_factor.pdf (285 kB)
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antenneX No.134, Jun 2008.
Wet Antennas
wet_ant.pdf
(220 kB)
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antenneX No.133, May 2008.
Inverted Amos Antenna as Linear Feed for Cylindrical Parabolic Reflector
linefeed.pdf (970 kB)
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antenneX No.132, Apr 2008.
VHF Antenna Noise Temperature
vhfnoisetemp.pdf (750 kB)
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antenneX No.131, Mar 2008.
Quados Antenna
quados.pdf (960kB)
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antenneX No.130, Feb 2008.
Inverted Amos Antenna
invertamos.pdf
(636kB)
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antenneX No.129, Jan 2008.
Obelisk Antenna
Obelisk.pdf
( 990 kB)
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antenneX No.128, Dec 2007.
Two el. Bi-quad Antenna Feed for 2.4 GHz
Feed for 2.4 GHz (2 MB)
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antenneX No.127, Nov 2007.
Amos Antenna
Amos.pdf (1.3 MB)
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antenneX No.126, Oct 2007.
3D Corner Reflector Antenna Feed for 5.8 GHz
3D_Corn_Refl_Feed.pdf
(1.2 MB)
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antenneX No.125, Sep 2007.
Shortened 3D Corner Reflector Antenna
S3DCRA.pdf (850 kB)
© Copyright 2001 - 2007. All rights reserved by Dragoslav Dobricic, YU1AW.
NEW!
Atmospheric static discharge protection for Amos and Quados antennas
Quados antennas
Compare gain and coverage angles of different Quados antennas:
Quados 4 sector Antenna for 2.4 GHz (2007)
New horizontal polarization antenna with 4 Quads and coverage angle of 70 deg. for -3 dB and 90 deg. for -6 dB for 2.4 GHz Wireless LAN Access Points.
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Built by Trivke
Quados 6 sector Antenna for 2.4 GHz (2007)
New horizontal polarization antenna with 6 Quads and coverage angle of 70 deg. for -3 dB and 90 deg. for -6 dB for 2.4 GHz Wireless LAN Access Points.
quados.pdf (960kB)
Quados 8 sector Antenna for 2.4 GHz (2007)
New horizontal polarization antenna with 8 Quads and coverage angle of 70 deg. for -3 dB and 90 deg. for -6 dB for 2.4 GHz Wireless LAN Access Points.
Built by Trivke
NEW!
OBELISK sector antenna for 2.4 GHz WiFi (2007)
Very easy to build, very good antenna for Wireless LAN Access Points,
with vertical polarization and horizontal covering angle of 75-100 deg.
Obelisk.pdf ( 990 kB)
Built by Istvan YU7EW
Built by Velimir, 9A2VJ
Built by Meda i Neđa - Velika Drenova
NEW!
OBELISK sector antenna for 5.8 GHz WiFi (2007)
Very easy to build, very good antenna for Wireless LAN Access Points,
with vertical polarization and horizontal covering angle of 75-100 deg.
Built by Roman
Sagradio: Stojke
Amos antennas
Compare coverage angles of different Amos antennas:
Compare coverage angles of different Inverted Amos antennas:
Inverted Amos antenna is NOT Amos antenna with just rotated active dipole elements! Dimensions are different!
Omnidirectional antenna built from two Amos antennas
With two Amos antennas and 1:2 spliter it is possible to build omnidirectional antenna if they are mounted "back to back". It is very important that distance between reflectors is less then 1/10 wavelength or 12 mm at 2450 MHz. Pictures show directivity paterns of two Amos 5 antennas at distance of 10 mm.
Two Amos 7 antennas at distance of half wavelength (60 mm) produce horizontal radiation patern, as given on picture.
2 x Amos-9 Omni antenna
Built by: Djordje and Ćira, Trstenik
NEW!
AMOS 5 antenna for 2.4 GHz WiFi (2005)
Easy to build very good antenna for 13 cm amateur band and
Wireless LAN Access Points, covering 180 deg.
TXT in English:
Amos.pdf (1.3 MB)
Built by: Nebojša Rosić -rolex
Built by: http://www.brest-wireless.net/wiki/materiel:amos ,
http://www.brest-wireless.net/forum/viewtopic.php?id=75&p=2
( in English: http://www.larsen-b.com/Article/209.html )
Built by: Erwin, PE2ER (comments)
http://forum.wirelessnederland.nl/viewtopic.php?t=7428&highlight
http://home.wanadoo.nl/erwin.gijzen/wifisector/
Built by: Adam, 9A4QV
Built by: Vasko Ackovski
Built by:
Velimir 9A2VJ
Built by: Sokrati Hasanu
NEW!
Inverted Amos 3 - sector antenna for 2.4 GHz WiFi (2006)
New version of Inverted Amos antenna with 3 dipoles, broader vertical angle and coverage angle of 85 deg. for -3 dB and 120 deg. for -6 dB.
NEW!
Inverted Amos 5 - sector antenna for 2.4 GHz WiFi (2006)
New version of Amos antenna with 5 dipoles and coverage angle of 75 deg. for -3 dB and 110 deg. for -6 dB.
Built by Trivke
NEW!
Amos 3 - wide angle antenna for 2.4 GHz WiFi (2006)
New version of Amos antenna with 3 dipoles, broader vertical angle and coverage angle of 110 deg. for -3 dB and 160 deg. for -6 dB.
Dimension error corrected.
NEW!
Inverted Amos 7 - sector antenna for 2.4 GHz WiFi (2006)
New version of Amos antenna with 7 dipoles and coverage angle of 75 deg. for -3 dB and 105 deg. for -6 dB.
Text in English: invertamos.pdf (636kB)
Built by NYC and Pota
Built by Trivke
NEW!
Amos 7 - wide angle antenna for 2.4 GHz WiFi (2009)
New version of Amos antenna with 7 dipoles and coverage angle of 140 deg. for -3 dB and 185 deg. for -6 dB.
NEW!
Amos 9 - wide angle antenna for 2.4 GHz WiFi (2006)
New version of Amos antenna with 9 dipoles and coverage angle of 130 deg. for -3 dB and 175 deg. for -6 dB.
Bilt by Cyrix
Built by Stojke
NEW!
Inverted Amos 9 - sector antenna for 2.4 GHz WiFi (2006)
New version of Amos antenna with 9 dipoles and coverage angle of 70 deg. for -3 dB and 100 deg. for -6 dB.
Built by: Vasko Ackovski
Built by: Zlatko Čikvar
Built by: Stojke
NEW!
Simple 2.4 GHz splitter for two antennas
Built by: Djura Stevanović
Built by: Jecksons Jecks
NEW!
Truncated 3D Corner Reflector Feed for Offset Dish at 5.8 GHz WiFi (2005)
Modified 3D Corner Reflector Feed for SAT TV offset parabolic dish
TXT in English:
3d_corn_refl_feed.pdf (1.2 MB)
Built by Spider and Pota
Built by Spider and Pota
5.8 GHz 50 km link:
http://gallery.bgwireless.net/BGW-NSW
5.8 GHz 20 km link
Built by Ricardo, LU8KAW
Built by: Jeckson Jecks - Indonesia
NEW!
2 el. BiQuad Feed for Offset Dish at 2.4 GHz WiFi (2005)
Optimized 2 el. Biquad Feed for SAT TV offset parabolic dish
TXT in English:
Feed for 2.4 GHz (2 MB)
Built by: Spider and Pota
Built by: hLAND and Sonyboy
NEW!
Shortened 3D Corner Reflector Antenna for 2.4 GHz WiFi (2005)
Optimized, easy to build, very good antenna for 13 cm amateur band and Wireless LAN as ideal antenna for clients
TXT in English:
S3DCRA.pdf (850 kB)
Built by: Pavel, YT7TA
Built by: Adam, 9A4QV
Built by: Pol Isidor
Built by: Pavle Špoljarić
Built by: Ivan Babić
Shortened 3D Corner Reflector Antenna for 5.6 GHz WiFi (2006)
Built by: Igor Luburic
Modified 3D Corner Reflector Antenna for 2.4 GHz WiFi (2005)
This antenna is further more optimized and then described up as "Shortened 3D Corner Reflector Antenna"
Easy to build very good antenna for 13 cm amateur band and Wireless LAN
(TXT in Serbian)
Built by: DrARKO
Built by: maxrale
Built by: MiniC
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Built by: Vlado, YU7YZ
Easy to build antenna for 13 cm amateur band and Wireless LAN
Note: Due to program limitations reflector plane is simulated as grid structure. Grid is partially RF transparent because of large holes between grid wires. Consequently, simulated gain is about 1 dB less and radiation side lobes are increased.
