tag:blogger.com,1999:blog-8801696042247471625.post2584528856077106350..comments2024-03-22T20:03:40.806+02:00Comments on Build Your Own Antenna: Double BiQuad sector antenna for 2.4 GHz / WiFi / WLANMartynashttp://www.blogger.com/profile/00471091754225207342noreply@blogger.comBlogger16125tag:blogger.com,1999:blog-8801696042247471625.post-6930540026227048282023-11-13T18:44:07.784+02:002023-11-13T18:44:07.784+02:00does it work also in vertical direction? pointing ...does it work also in vertical direction? pointing up or downAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-1175252094703080432021-10-21T15:03:05.497+03:002021-10-21T15:03:05.497+03:00i want to make antenna for jio dongle what is this...i want to make antenna for jio dongle what is this Mhz and GHzgurpal punjabhttps://www.blogger.com/profile/07911124076215257576noreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-82646505514676409022019-04-06T21:26:51.764+03:002019-04-06T21:26:51.764+03:00Are the NEC files still available for download any...Are the NEC files still available for download anywhere? I'm looking for the 5ghz no-lips NEC files specifically.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-15764130592420363252019-01-25T13:34:48.577+02:002019-01-25T13:34:48.577+02:00How do you calculate the ratio values? Some websit...How do you calculate the ratio values? Some websites show (1/8 * wavelength) for element spacing and (1/4 * wavelength) for section length.Anonymoushttps://www.blogger.com/profile/16363899108017212835noreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-41677390116230697432017-10-22T00:44:04.806+03:002017-10-22T00:44:04.806+03:00this four separate biquads array doesn't work ...this four separate biquads array doesn't work better than single one. period. I build it and tested it. same with double biquad doesn't perform better than single. Reflector is 1.2 Ghz resonance freq. doesn't make sense. waste of time and materials.Anonymoushttps://www.blogger.com/profile/15806231252370908423noreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-54339959731267103072016-08-27T09:23:00.164+03:002016-08-27T09:23:00.164+03:00Thanks for a well written instruction, I understan...Thanks for a well written instruction, I understand the dual biquad, but in the bottom photograph painted/unpainted. you have 4 separate biquads all connected together, does it have a wider beam than a dual biquad and a gain? I am only planning to use it on the receiver and I need a wider horizontal coverage rather than a narrow point to point link. Is there any mathematics involved in the the separation of the 4 separate biquads Anonymoushttps://www.blogger.com/profile/10702882943564135220noreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-12426851363584516202016-07-21T12:42:25.504+03:002016-07-21T12:42:25.504+03:00if that's the best antenna you can make?
i lov...if that's the best antenna you can make?<br />i love it's pattern . and i will use it on my 10 microsecond pulsed microwave over magnetron radar, if i ever build one.<br />why do the boat radar antennas look so different?<br />i wana make a 100 element ~9.4ghz version. do you think it will have gain over the oem mobile hardened version?(with an appropriate dome enclosure of course<br /><br /><br />make it 3d with multiple passive directors<br /><br />solder the a 2450 magnetron directly to the antenna and pulse it with a car coil threw a 25kv .1nf for 100 nanoseconds .. powered threw a vcr head ferrite or maybe a coaxial dc motor driven by a dc motor with a long shaft threw a 1" id sealed for life Timken pall baring welded to a pedestal plate with a nitrile timing belt pulley etc....<br /><br />don't forget to remove the heatsink since it will only be using 1 watt with 20 watts for the filament<br /><br />better just use a front wheel drive hub bearingAnonymoushttps://www.blogger.com/profile/02234752595310537477noreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-14986191635812077662016-07-21T12:40:01.021+03:002016-07-21T12:40:01.021+03:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/02234752595310537477noreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-17833492062676057972016-07-21T12:35:52.400+03:002016-07-21T12:35:52.400+03:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/02234752595310537477noreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-15505713737885885122016-07-21T12:20:51.223+03:002016-07-21T12:20:51.223+03:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/02234752595310537477noreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-25479085795122192012016-07-21T12:14:47.847+03:002016-07-21T12:14:47.847+03:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/02234752595310537477noreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-17002725220092385642016-06-07T03:50:21.026+03:002016-06-07T03:50:21.026+03:00Hello Friend
in which it is based to get these val...Hello Friend<br />in which it is based to get these values?<br />Section length - 2/√2×ratio×lamba = 30.89 mm ≈ 3.1 cm<br />Wire diamter - wire.radius.ratio×lambda×2 = 1.517 mm (Wire area A = πd2/4 ≈ 1.8 mm2)<br />Element spacing - element.spacing.ratio×lambda = 11.099 mm ≈ 1.1 cm<br />Reflector height - ver.length.ratio×lambda×2 = 131.2 mm ≈ 13.1 cm<br />Reflector length - hor.length.ratio×lambda×2 = 281.79 mm ≈ 28.2 cm<br />Height of reflector "lips" - lips.length.ratio×lambda = 28.5 mm ≈ 2.9 cm<br /><br />I want to know how to get<br />wire.radius.ratio lips.length.<br /><br />Thank you<br />Anonymoushttps://www.blogger.com/profile/03672727901612145383noreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-12044588909339207982016-03-22T23:38:29.689+02:002016-03-22T23:38:29.689+02:00i do it. thank you so much. i got about 13 db i do it. thank you so much. i got about 13 db Anonymoushttps://www.blogger.com/profile/16872993286381292074noreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-74920849117677473682015-11-12T15:23:51.689+02:002015-11-12T15:23:51.689+02:00I have one question about constant value named ele...I have one question about constant value named element.spacing.ratio and other "ratio's" How to calculate this value? Please help me.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-83149656479642221032015-09-05T14:06:57.086+03:002015-09-05T14:06:57.086+03:00this antenna tutorial is intended for receiver sid...this antenna tutorial is intended for receiver side only, still I think there is nothing to stop using it as sender.<br />The range ? all depends on sight obstacles and AP. <br />As i said, its just one side guide. For long distances its best to use very directional antennas (<20º), this one is more like moderate directional antenna (>30º) which fits better as client side.Martynashttps://www.blogger.com/profile/08547610792781621923noreply@blogger.comtag:blogger.com,1999:blog-8801696042247471625.post-13935506898446607922015-09-05T13:18:28.715+03:002015-09-05T13:18:28.715+03:00Nice tutorial, I have a couple of questions
What i...Nice tutorial, I have a couple of questions<br />What is the range of this antenna?<br />Do I need these antennas at both ends for long distance WiFi.?<br />What if we use a similar biquad as the transmitter and a laptop or smartphone as the receiver.Anonymoushttps://www.blogger.com/profile/05981997163603727488noreply@blogger.com