Admin

Is that what you want...??

,,,do you want something like this...???

,,,f/D=0.25...you can see the difference...!!!

,,,read this..https://www.antenna-theory.com/antennas/reflectors/dish3.php#:~:text=Aperture Taper Efficiency&text=This efficiency can be improved,the spillover efficiency%2C discussed next.

,,,all sizes...!!!

I tried to optimize your antenna for 2442 MHz .....

https://downloadly.ir/software/engineering-specialized/ansys-electronics/ https://downloadly.ir/software/engineering-specialized/cst-studio-suite/

Panel antenna for amplifying mobile Internet signals of all outdoor mobile communication standards. It is used in conjunction with USB modems, LTE routers, and CPE fixed routers. Technical specifications Cable length, m=5 Voltage SWR, no more 1.4 Package weight, kg 0,8 Operating frequencies, MHz 790-860, 1700-2700 Assembled dimensions, mm 275x245x87 Antenna placement external Gain, max., dBi9 / 15 Wave resistance, Ohms 50 Connector type SMA Weight, kg 0.8

d=52,5 mm>>>for 2,35 GHz d=54,3 dr=180 mm>>>for 2,35 GHz dr=186

If we had to participate in field tests of a transceiving apparatus, part of which was various types of antennas, and as Omni-directional, they are independent from the design and the claimed gain in performance for range transmission and reception is insignificantly different from each other. A significant difference was their price. Of greater importance, as we understand it from practice, had such option antenna as it is efficiency, which directly connected with the working surface (the larger antenna size than she is better), but not with the stated gain. So simple homemade omnidirectional antenna is not what is not inferior to similar fancy designs. For beginners, we don't would advise to grasp for the production of Omni-directional antennas with a large gain such as collinear or the like. Without skills and lack measuring instruments to achieve from these structures excellent results not will. The antenna that we propose to assemble, has an important property. First of all, it is quite simple and broadband (bandwidth 200 MHz), this means that miss relative to the fundamental frequency of transmission and reception as a result of the inaccuracy construction will be difficult, which is an important factor in the case the lack of measuring devices. However, simple a homemade antenna will differ markedly from the purchase of the product may because a nested design energy of creativity yields results. The antenna is a quarter-wave vibrator with a counterweight

Pupe, try a Strella-11 omni antenna too....!!! I think we still need to work on this...

Also available for sale are the more powerful Stella-8 and Stella-11 antennas with a gain of 8 dBi and 11 dBi, respectively. Communication Standard WIFI 2400 Frequency range, MHz 2400-2480 Gain factor, dB 11 Bottom width in the horizontal plane, deg 360 Bottom width in vertical plane, deg 9 Wave resistance, Ohms 50 SWR no more than 1,5 Weight, grams 1100 Dimensions, cm 100 x 8 x 6 RF connector N-Female

,,,that's what it would be like... reflector diameter=180 mm

,,,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