Biquad Wifi Antenna Design
IntroductionThis is basic instructions on building a handmade Double BiQuad antenna for WiFi/WLAN 2.4 GHz with 14 dBi Gain. (13.6 dBi if antenna without lips)Note: The dBi scale is logarithmic in base 10, where +3 dBi is a doubling in gain! An increase in gain of +1 dBi is equivalent to an increase of 26% and +2 dBi is equivalent to an increase of 60%. This means that the increase in +1dBi is a big deal.On the internets you can find quite a lot guides how to make handmade BiQuad antenna for WiFi 2.4GHz but this guide is slightly different as I used computer software (antenna modeler and optimizer) version 5.8.11 to model theoretically the perfect antenna. This makes this guide more accurate than others, because others are using approximate parameters while mine measurements based on very careful analysis with computer software which results many times has been proven to be quite accurate and reliable in physical world.Description.
( Very important to choose proper cable! the longerthe cable length, the more signal loss you'll have through the cable. Long cable will defeat the purpose of the antenna. Read the guide for more info.). 60 cm length of copper wire for the element. 1.2-1.5 mm in diameter. Wider is not recommended.
Double Biquad Antenna Element
Spacers in each end of the element to hold its position and spacingcorrect height between the radiator and the reflector. Spacers must befrom any non-metallic material. Plastic will do alright.N-Type (female) connectorSingle Sided Copper Clad BoardBuilding the antennaI will not show you picture after the picture how to drill the hole in center of reflector. How to use ruler. How to do proper soldering. What kits to use and etc. Drivers asrock wolfdale1333-d667 windows 7.
There are plenty of tutorials for these steps:, or(Note: You really want to use mine calculated data and measurements for 2.4 GHz antenna.)(Note: Pictures below not to scale)Element bending. Hello Friendin which it is based to get these values?Section length - 2/√2×ratio×lamba = 30.89 mm ≈ 3.1 cmWire diamter - wire.radius.ratio×lambda×2 = 1.517 mm (Wire area A = πd2/4 ≈ 1.8 mm2)Element spacing - element.spacing.ratio×lambda = 11.099 mm ≈ 1.1 cmReflector height - ver.length.ratio×lambda×2 = 131.2 mm ≈ 13.1 cmReflector length - hor.length.ratio×lambda×2 = 281.79 mm ≈ 28.2 cmHeight of reflector 'lips' - lips.length.ratio×lambda = 28.5 mm ≈ 2.9 cmI want to know how to getwire.radius.ratio lips.length.Thank you. If that's the best antenna you can make?i love it's pattern. And i will use it on my 10 microsecond pulsed microwave over magnetron radar, if i ever build one.why do the boat radar antennas look so different?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 coursemake it 3d with multiple passive directorssolder 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.don't forget to remove the heatsink since it will only be using 1 watt with 20 watts for the filamentbetter just use a front wheel drive hub bearing.
About BiQuad Antenna calculatorThe resource is currently listed in dxzone.com in 2 categories. The main category is 2.4 GHz Wifi antennas that is about 2.4 GHz Wifi antennas.This link is listed in our web site directory since Saturday Sep 15 2012, and till today ' BiQuad Antenna calculator' has been followed for a total of 7790 times. So far received 345 votes for a total score of 5.00/10You may find other interesting sites similar to this one, under the following categories:. Antenna design calculators. 2.4 GHz Wifi antennas.