#HOME MADE DOUBLE BIQUAD WIFI ANTENNA BLUETOOTH#

Gain In antenna design, gain is the logarithm of the ratio of the antenna's radiation pattern to that of some ideal antenna, typically the theoretical isotropic antenna.ДB a measure of the ratio between two quantities, and commonly used to measure signal-to-noise ratios. The frequency of 802.11b ranges from 2.412 GHz (channel 1) to 2.477 GHz (channel 14). Because microwave energy is absorbed by solid obstructions, LOS is required for a good wireless signal between two locations.Д«eamwidth The beamwidth of an antenna is the angle between the half-power (3 dB) points of the main lobe, when referenced to the peak effective radiated power of the main lobe, usually expressed in degrees (and usually given in the horizontal plane).Д«andwidth the amount of data that can be transferred in a given time period, normally measured in kbps (kilobits per second) or Mbps (megabits per second).ДЇrequency The number of cycles per second. Wireless Concepts LOS Line-of-sight if two locations have a clear, unobstructed view of each other, they are said to have good LOS. There is also 20 km line of sight, but there is a hill between the points.Wireless Standards 802.11b provides speeds upto 11Mbps at 2.4GHzДЁ02.11g provides speeds upto 54Mbps at 2.4GHzДЁ02.11a provides speeds upto 54Mbps at 5.8 GHzДЁ02.11n an unratified standard that should provide speeds of upto 100Mbps (WWiSE and MIMO are two competing proposals for 802.11n) Unfortunately, this is the maximum distance in my area where I may have more or less clear Fresnel zone. And then with the satellite dishes (hope to achieve +25 dBi per node) to reach 10 km. I hope to break this 2 km barrier with directional antennas first (supposed to be +10 dBi each) which hopefully results in 5+ km range. The link budget with monopole omnidirectional antennas (I assume 0dBi) and +8dBm PA on transmitter side is 104 dB which results in about 1600 m of theoretical range. I don't expect the mirrors will be of high quality, but I believe they're big enough to compensate some errors. Looks like most of them were designed with F/D в‰€ 0.5, hence the feed antenna should fit vast majority of its radiation into 90 degrees beam. I'm going to use a pair of cheap offset satellite mirrors of about 80 cm diameter.

#HOME MADE DOUBLE BIQUAD WIFI ANTENNA BLUETOOTH#

You may wanna study feeds efficiency (spillover ,etc)В for you desired Dishes.anything close to 70%or more would be GREAT for your project.(over 20dbi gain should be enough, if there are NO LOSSES (dielectrics, cables, connector, mismatch ,etc) and if it is only BLUETOOTH ,you may use high Q factor centered on your band, NO need for wide Bandwidth.there However, I've noticed that the DXF / Gerber files (cited above) are not fully correspond to the dimensions on the CST screenshots listed for a very similar 2.44 GHz design - DXF / Gerber is bigger.Д¬ould you point me to the most decent model for 2.442 GHz, please?ДЄlso, may be there a better option to take the feed horn role? Also, I'm going to further tune the antenna with matching network to better match my source. I ilke that they can be manufactured on FR4 which means high reproducibility and hence low error margin. Both do promise about +10dBi gain, with the biquad a little bit narrower and hence with better directivity. I have noticed your biquad and batwing antenna designs. To break 2 km range, I'm thinking about a couple of offset dishes 1m diameter (expect to reach +25dBi), and looking for a suitable feed horn. I'm working with Bluetooth 5 enabled microcontrollers, and for an experiment want to build a long range symmetrical setup using vanilla nRF52840 MCU (+8dBm max).

First of all, please let me thank you for sharing the designs! This is absolutely stunning what you guys are doing here.

Home made double biquad wifi antenna