Admin

,,, of course, I will try to design a batwing antenna around this frequency...!!!

,,, this happens at cross polarization...!!! ,,, but by changing the dimensions a wide band of frequencies can be obtained...!!!

Picture series shows the teardown of this antenna. This particular version has separate 7/16 connectors for connection to the horizontally and vertically polarised antenna. Construction is very solid Deutsche GrÜndlichkeit: stainless steel bolts, silvered connectors, tons of pop rivets to obtain a very rigid construction etc. The Kathrein catalog promises 15 years of maintenance free operation. As can be seen extensive lengths of semi-rigid, or more exact Huber & Suhner Sucoform 141. The cables are connected via soldered-on 'junction boxes'. The white blocks are plastic spacers.

,,, maybe so ... ,,,or so...

,,, feed2 at 120 degrees...

,,, yes, on this forum you can find enough ways to connect 4 antennas..!!!

Юрий 26,,,, say in English please ... !!!

,,,yes,1800MHz(1750-1950)...!!!

Юрий 26,,, the dimensions in red are for you...

,,,say it in English..!! ,,, is interested in the dimensions of the dipole in detail...!!! ,,, for construction see this,,,https://www.lan23.ru/forum/node/10024/page13

,,, okay, but I need some dimensions...!!!

,,, maybe this would be another method...

,,, thanks Antonius, no, the performance of the antenna is not influenced by this method of soldering .. !!! ,,, please ,attach a few words for explanation to each image above...!!!

,,, adenden, these are the dimensions...

,,,wrong...!!!

,,,,this is the 2442 MHz antenna... gnutika60.cst

,,, give up the nuts and put spacers from the 10mm diameter pipe and M8 screw inside...!!!

,,,,adeden,speak in English please...!!!

,,, this is the real Petra-9 2x2 Box antenna...

Offset irradiator in the range of 1670-1720 MHz. Ra=50 Ohms. GAIN=10 dBi. It is intended for use as part of equipment (mirror antennas) for receiving L-band RCPH signals from geostationary satellites. Electrical characteristics Operating frequency range, MHz 1670 - 1720 Native gain, dBi 10 The resulting CU and radiation pattern width in terms of level is 3 dB for different diameters of an offset parabolic antenna (at a frequency of 1695 MHz) with an F/D ratio of 0.5 0.55 m 17,5dBi 21 gr. 0,6 m 18,6dBi 19,5 gr. 0.9 m 21,7dBi 14 gr. 1.3 m 25dBi 9 gr. 1.5 m 26,4dBi 8 gr. Width of the bottom of the irradiator in the H-plane by level-10dB, deg 100÷115 Width of the bottom of the irradiator in the E-plane by level-10dB, deg 100÷115 Input impedance, Ohms 50 SWR in the operating frequency range, max. 1,3 Permissible power, W 10 Polarization of the irradiator\offset mirror antenna left\right circular map Mechanical characteristics Weight, g 300 Overall dimensions, m 0, 145x0,145x0, 154 Connector SMA-male on flexible cable Irradiator material galvanized steel Protective coating powdered polymer paint Material of the protective box ABS+Polycarbonate

GSM refers to the networks of the second generation (2 Generation) (1G — analog cellular, 2G — digital cellular, 3G — wideband digital cellular, dial-up multi-purpose computer networks including the Internet). Mobile phones come with support 4 frequencies: 850 MHz, 900 MHz, 1800 MHz, 1900 MHz. Below is a 2x2 MIMO antenna panel on 1800 MHz

,,, these are the dimensions(in Red) for 2.3 GHz...

In the 1926, Dr. Shintaro Uda and Dr. Hidetsugu Yagi of the Tohoku Imperial University invented a directional antenna system consisting of an array of coupled parallel dipoles. The second dipole in the Yagi-Uda array is the only driven element with applied input/output source feed, all the others interact by mutual coupling since receive and reradiate electromagnetic energy; they act as parasitic elements by induced current. It is assumed that an antenna is a passive reciprocal device, then may used either for transmission or for reception of the electromagnetic energy: this well applies to Yagi-Uda also. The simplest or minimal Yagi-Uda antenna has at least two parasitic elements behind the Driven Element (DE); the antenna with only one parasitic element as Reflector element (Ref) is generally called Yagi antenna. This happens when the electrical length of the parasitic element is greater than the driven element.