Welcome to WIFI Antennas
Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.
Admin
Administrators-
Content count
4757 -
Joined
-
Last visited
Everything posted by Admin
-
,,,122 mm diameter.../// I don"t think so...!!! ///maybe 40,5mm iameter...!!!
-
,,,what is the diameter of the rings and plate...!!!
-
,,,take this... parabola0,6.cst
-
,,,this is the simulation with your parabola(f/D=0,6)... and Efficiencies... And this is the antenna...
-
0.01 dB
-
No, this is not a general rule....what do you mean by efficiency coefficient...!!!...???
-
,,,but f/D=0.,448 ,it must to be 0,6...!!!
-
I think it must be f/D=0,6 Did you get the antenna from this forum...???? What is the diameter of the parabola...???
-
,,,yes, it seems so, the antenna is narrow band...!!!
-
Radiation patterns and gain measurements on 1.0, 1.5, and 2.0 lambda backfire Yagi antennas are given. The backfire antenna was tested for two dipole feed locations, and variations in the diameters of the two planar reflectors forming the backfire cavity. The optimum dimensions of the three test antennas are tabulated. The frequency bandwidth of the backfire antenna is limited to several percent due to impedance matching. The backfire antenna should find application in broadside arrays where conventional endfire antennas are presently used. 19680012807.pdf
-
,,,yes...!!1
-
-
,,,a first simulation attempt, optimization follows...
-
A new attempt at impedance equalization,with a single port... ,,,and some other dimensions...
-
Clanon,could you give some dimensions?
-
AX-OFFSET D60 offset mesh reflector with high wind resistance, robust all-welded construction. Designed for use in a complete set with irradiators at frequencies up to 7000 MHz. Recommended for use in LTE800/GSM900/LTE1800/LTE2100/UMTS2100/LTE2600/WIFI networks. The irradiator is not included in the kit and is supplied separately. Electrical characteristics Gain factor F=800 MHz at KIP=0.55 11,5 dBi Gain factor F=1700 MHz at KIP=0.55 18 dBi Gain factor F=3000 Mhz at KIP=0.55 22.5 dBi Gain factor F=7000 Mhz at KIP=0.55 29 dBi Mechanical characteristics of the antenna Weight with mounting, g 1900 Overall dimensions, mm 660 x 6 00 x 465 Overall dimensions in the package, mm680 x 610 x 150 Diameter of the irradiator seat, mm 40 Mirror dimensions, mm 700 x 600 Offset angle 31° F/D 0.53 Aperture opening angle 100° Mast diameter, mm 35…52 Antenna Material Galvanized steel, Steel Protective coatings Powder paint Operating temperature range -60.... +100°C
-
,,, another version of Bester Antenna by Alexander Bars.... and positioning this antenna in the focus of an offset parabolic dish
-
Another combination...
-
Loop yagis are basically a hybrid design of a tuned loop in a yagi type array. The best material to use for the construction of a loop yagi is brass, or copper. Brass is the better choice since it is easier to solder and corrodes less than copper. An example of a loopyagi in use. The antenna is on it's side so that the polarisation is vertical.
-
,,and yet where are the dimensions...?
-
,,,and this loop is for 145 MHz...
-
,,,and they are really interesting....
-
This size of wire is not suitable for this frequency.
-
I think it would be best to build the loops from 3x25 mm flat strip."
-
,,,like this../
