Admin

,,,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

5.8 GHz 17dB High Gain AAT Automatic Antenna Tracker for HD FPV RC Racing Drone Product Description: Model: 5.8 GHz 17dB AAT Automatic Antenna Tracker Frequency Range: 5150-5950mhz Input impedance: 50Ω VSWR at surface level: <1.5 Antenna Gain: 17dBi HPBW (3dB): 16 ° H-plane 38 ° E-plane F/B:> 20 (dB) Max Power: 50W Polarization: Vertical polarization Connector Type: RP-SMA Static protection: DC ground Antenna Length (AAT): 30 cm Size: 136*68*10 mm Weight: 57g (Manual)/47g (AAT) Package included 1x5. 8 GHz 17 dB high gain

,,,yes...!!1

Irradiator series BOF-2xxx is designed for use with standard metal, satellite parabolic offset mirror. The utilization of mirror surface is more than 0.7. The radiator is optimized for mirror with f/d=0.5÷0.7 and the angle of irradiation 75÷90 degrees. (The vast majority of satellite dishes on the market.) The plane of polarization of the antenna is changed by changing the position of the radiator to the mounting site. (Rotation, followed by fixing in position.) Polarization direction is indicated by an arrow (the arrow) on the casing of the irradiator. The direction of polarization of the radiator and antenna are the same, because after reflection from the reflector, the vector of linear polarization is not changed. With circular polarization, upon reflection from the mirror direction of rotation is reversed! ,,, this is a MiMo simulation irradiator, the antenna can be on different frequency range

,,,a first simulation attempt, optimization follows...

Here are some quick notes about the parabolic type dish antennas you might find. The actual antenna is a normal half wave dipole with an integrated balun and is located inside the sealed plastic cover. The mesh screen is the reflector which concentrates the RF energy onto the antenna. That is how dish antennas increase the received or transmitted power level. Also, wireless cable service providers frown upon giving away their used dishes as they think you're going to steal cable service.

Single band IEEE 802.11 a/n standard High gain patch antenna Frequency (MHz) : 5150-5825 Peak Gain (dBi) : 10.0 VSWR : 2.0 : 1 Dimension (mm) : 76 x 72 x 3.8 Connector : IPEX MHF I Cable Length (mm) : 50 (customized) It seems to work well on the 5.6 GHz frequency.

A new attempt at impedance equalization... ,,,and some other dimensions...

Sealed box for 3G / 4G modem with built-in wide-band MIMO antenna and integrated 10-meter USB cable. The device is completely ready for self-installation: inside the case you will find two CRC9 pigtails for connecting the antenna part to the modem, and the complete mount will allow you to easily install the PETRA-12 MIMO 2x2 BOX on a facade bracket, pole or remote mast. Nothing prevents the device from being used indoors as well! Communication standardsGSM-1800, UMTS-2100, LTE1800, LTE2600 Frequency range 1700-2700 MHz Gain factor 10-13 dBi Bottom width in the H-plane 30–48° Bottom width in the E-plane 46–63° Input impedance 50 ohms SWR in the operating frequency range≤ 1,6 Polarisation vertical + horizontal Permissible power 10 W Forward / backward ratio 14-15 dB Side lobe level≤ -10 dB Decoupling between ports in the operating range≥ 32 d RF connectors 2 x CRC9 USB Cable Length 10 m Antenna Material FR-4, galvanized steel Material of the protective box polycarbonate+ABS Mounting material galvanized steel Shell Protection IP54 Permissible wind speed 25 m / sec Operating temperature range-40°C to +80°C Size 260 x 135 x 90 mm Weight 1 kg Equipment PETRA-12 MIMO BOX antenna with CRC9 connectors, 10 m USB extension cable, pipe or mast mounting kit, user manual

Clanon,could you give some dimensions?

Bottom of a circular metal box can build a simple antenna with an elliptical radiator...

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

This project is dedicated to Doyt R. Hoverman (b.1913), the man who created and did the early work on the Hoverman antenna at a time when antenna modeling programs did not exist. His work would have been entirely created and improved by field testing, trial and error, and with a great amount of calculation without the benefit of electronic devices. Without his efforts, our work would not have been. Doyt Hoverman passed away in December, 1989 at Van Wert, Ohio, USA. Technical data Simulation With insulating spacers

,,, another version of Bester Antenna by Alexander Bars.... and positioning this antenna in the focus of an offset parabolic dish

Is a Russian patch-antenna for its positioning in the focus of a parabola offset... Antenna is broadband (2.3-2.7GHz) Bester Antenna on the offset dish It has a elliptical polarization antenna.

Another combination...

The helical antenna is a hybrid of two simple radiating elements, the dipole and loop antennas. A helix becomes a linear antenna when its diameter approaches zero or pitch angle goes to 90º. On the other hand, a helix of fixed diameter can be seen as a loop antenna when the spacing between the turns vanishes (α = 0º ) . Helical antennas have been widely used as simple and practical radiators over the last five decades due to their remarkable and unique properties. The rigorous analysis of a helix is extremely complicated for Circularly Polarized Patch-Helix Hybrid Antenna with Small Ground. Helical antenna calculator...http://jcoppens.com/ant/helix/calc.en.php