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Everything posted by Admin

  1. ,,,, and what you want for me...???
  2. ,,, and why are you telling me this ... ?? ,,, because this antenna is a fake ... ???
  3. ,,,no, the isolation is a measure of how well the two ports are separated from each other in terms of unwanted signal coupling. 30dB isolation is in most cases considered 'high isolation'(s21. s12 =aprox.30dB) The port-to-port isolation is defined as the ratio between the power fed into one port of the antenna and received at the other port. Ideally one would like the two ports to be completely independent (infinite isolation) because the signal transmitted from one port will not interfere with the signal transmitted from the other port. The lower the isolation, the more interference there will be between the two transmitted signals. ,,,for satellite dish, I think the best is the Batwing antenna(it"s broadband)...!!!
  4. Is a Russian patch-antenna for its positioning in the focus of a parabola offset... Antenna is broadband (2.3-2.7GHz) It has a circular polarization antenna.
  5. AUREL, you're right buddy....!!! I will post a simulation of this fake antenna a little later ... !!!
  6. ,,, it's a bullshit ,,,!!! I simulated something like that many years ago...!!!
  7. ,,, maybe only so, for circular polarization... ,,,but with other dimensions...!!!!
  8. That would be the geometry of the antenna....
  9. 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
  10. 4G antenna BDM-2 is a wave channel with crack initiation, and the delay line is made of sequentially installed disk elements. Compared to the classical antenna BDM , new directional antenna BDM-2 is: More gain; Improved radiation pattern; More stable operating parameters; Greater reliability; Superior mechanical characteristics. Due to the small weight, a small sail and streamlined shapes, the antenna BDM-2 can be used in almost any climatic conditions. And corrosion-resistant materials of the antenna will ensure a long maintenance-free operation even in the marine climate. Specifications 4G/LTE antenna BDM-2: Antenna type Directed Beam width H/V ° 20/20 Frequency range, MHz 2600 MHz Polarization Linear orthogonal Gain, dBi 15-17 DBi depending on frequency of execution The CWS in RAB. the frequency range, not more 1.5 Max. input power,W 50 The weight of the antenna package, gr. 910 Input impedance, Ohm 50 Overall dimensions, mm Ф90 x 500 The operating temperature range, °C -40 .. +60 Performance All-weather, all - Connector (on the case) N-female x2
  11. ... I can't ,,,, with 4 gb of ram your pc has to work...!!!
  12. Clanon, try to install cst2020(or 2019)...!!!
  13. ... wouldn't one be better than this ... ??? ,,,a good antenna for parabolic(offset) dish....!!!
  14. gain in dBi = gain in dBd + 2.15 dB
  15. yagi

    ,,, this drawing is made by me according to the author's instructions... http://give-all.biz/articles/samdel/samodelnaya-antenna-analog-obluchatelya-bester https://www.lan23.ru/forum/node/71?t=42.......#7 post ,,,You"re from Mumbai...???
  16. ,,,the truth is that for this type of antenna also called 'gun', the insulation between the ports is not good , so the antenna is not good for MiMo....!!!
  17. ,,, okay, something like that you can build ... ??? ,,,, after the simulation I will send you the execution dimensions...!!!
  18. How does that new Bester Antenna behave ,,,???
  19. This is an article edited by the user "com666", for which, I would like to thank them....!!! The range of mobile communications covers a wide frequency band. The bands LTE800, LTE900, LTE1800, LTE2600 are already used to transmit LTE signals in Russia. 3G signals are transmitted in the ranges wcdma900, wcdma2100. To receive mobile signals in these ranges you need broadband antennas. Among industrial designs, it is difficult to find simple and repetitive designs. Most often, antenna manufacturers use separate antennas for the low-frequency and high-frequency parts of the range to cover the entire range and combine them with a frequency-dependent combiner. This approach has many disadvantages, such as: The design of the antenna is much more complicated. The hardest thing to do is a filter adder. The area occupied by the antenna is increasing. Losses from summing ranges are growing. Examples of such antennas in the photo below. SHYAM Antenna for 900 + 1800 Dual Band Repeater: However, full coverage of all ranges of mobile communications is not provided. There is a need for a simple broadband design with the overlap of the entire range of mobile communications 800-1700 MHz. Here is an example of such an antenna: The antenna is a modernized broadband Batwing, 1945 patent. "Batwing Super-Turnstile Antenna US Patent Number: 2480153 Year: 1945 Inventor: Robert W. Masters Original Document: US Patent Number 2480153 " There is a mention of this antenna at Rothamel in the book "Antennas" The antenna sheet can be cut from a flat galvanized sheet, 0.7 mm in one pass with a laser cutter. Additionally, you need to solder or rivet the cables from the same material with a size of 34x14mm. The antenna uses two flat square screens: Lower 220x220, above 95x95. Specifications:
  20. I tried to do a simulation with these dimensions of antenna and the result was not very good...!!!
  21. Chipset Atheros AR9271 The interesting device is "full N 300 Mbps" how it is full I Hate, 2R2T . But the fact that he uses on the reception of both antennas it is a fact, try to put on the first antenna panel 18Dbi result is worse than with two pins. Very good sensitivity , compared with a whistle at the base of Ralink - no worse. Fully compatible with Commview. In BackTrack5 and WifiSlax driver are - app. From slightly altered device: standard broke off the antenna ,put the connectors and soldered the cable to the antennas. TP-link WN822N TP-link WN822ND TP-link WN822N
  22. COMPARISON BETWEEN CIRCULAR AND RECTANGULAR DESIGN OF YAGI PATCH ANTENNA Following table2 gives comparison of results of Rectangular and Circular patch antenna: From simulation result of circular and rectangular yagi patch antenna it is clear that the performance parameter changes as change in geometry. COMPARISON OF SIMULATION ON DIFFERENT SOFTWARE Following table gives comparison of result on different software: From above table it is clear that performance of antenna parameter vary with simulation software .HFSS gives the improved results. CONCLUSION In previous work same antenna was designed in CST MICROWAVE studio software but the result were not satisfactory. Same design in HFSS gives improved result. With this design we get improved result of return loss ,F/B ratio, but gain result is not satisfactory. Gain can be improved by changing some dimension. For wifi antenna is the best solution previous work has done with CST software , but some antenna is proposed with HFSS software which has given the improved result and lower F/B ratio. Dielectric constant used for this antenna is FR4 epoxy which is easily available in market. By changing the shape, dimension the simulation will be performed and the result will be taken and with best result antenna will be fabricated.
  23. Magnetoelectric dipole antennas (MEDAs) with broad-band and symmetrical, stable unidirectional radiation pat-terns have been widely investigated and some designs for circular polarization have been reported recently. A MEDA formed by two bowtie patch antennas and two electric dipoles achieved an impedance bandwidth of 41% and a 3-dB AR bandwidth of 33% . A crossed dipole loaded with a magnetoelectric dipole can exhibit an impedance bandwidth of 60% and a 3-dB AR bandwidth of 27% . An antenna composed of two cross-placed magnetoelectric dipoles and a feeding network comprising a wideband 90degrees Schiffman phase shifter achieved a 10-dB return loss bandwidth of 85.7% and a 3-dB AR bandwidth of 61.5% . A MEDA fed by a single Γ-shaped probe attained an impedance bandwidth of 73.3% and a 3-dB AR bandwidth of 47.7% . A dual linearly polarized (LP) MEDA, excited by a power divider and a broadband 90∘ phase shifter, obtained an impedance bandwidth of 90% and a 3-dB AR bandwidth of 82% . A 60 GHz aperture coupled MEDA fed by a transverse slot etched on the broad wall of a section of shorted-end substrate integrated waveguide (SIW) showed an impedance bandwidth of 28.8% and a 3-dB AR bandwidth of 25.9% . However, these MEDA designs mentioned above are all based on single circular polarization.