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About Harry36

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  1. Real 1/4 petra 9 4x4
  2. version? 22 or 23?
  3. https://www.3ds.com/products-services/simulia/products/cst-studio-suite/latest-release/
  5. https://ieeexplore.ieee.org/document/1282144
  6. Figure 2 in the quote shows the dimensions of the antenna for LTE800 band (min swr~ 850 MHz), it is made in the form of two antenna sheets on different sides of FR4. the dimensions match the simulation quite well. In order to make a similar antenna for a frequency of 1296 MHz, you need to reduce the dimensions by a factor of 1.52 dimensions. The antenna has a fairly low gain of ~7.2 dBi. This is due to the minimum size of the reflector. By increasing the reflector to 250x250 mm, you can increase the antenna gain to 9.5 dBi at the same time, if you do not change other dimensions, the SWR also increases to a value of 1.1. tFR4=1mm, tCopper=0.018, H=28.4. Antenna connection is shown in fig. 1 quota is performed without balancing, this is a wrong connection. The cable must be soldered from the side of the web of one of the antennas (upper or lower) and brought along the arc of a circle to the middle of the frame (circle), then lowered onto the reflector, where to install the connector. Cable use RG-316. FR4 is a rather unstable material and antennas made from it very often fall outside the calculated range. for home production without appliances, it is not entirely suitable. it may be easier to make an antenna out of metal. For example, by type BDM. reflector and two disks. this will give a fairly wide bandwidth at a very low SWR and will forgive manufacturing errors even with a hand tool. or stack 2x2 or dipole from metal can dia=66.3 mm
  7. It's not dipole, this is biguad + balun )
  8. Try to draw a balancing device in the model.
  9. This is 50 Ohm version.
  10. edge feed - 2mm height 2.4 mm nut m3 (h =2.4) nylon 2 pcs screw m3 (l =10 mm) nylon from edge 4 mm vvibrator_1.1.cst
  11. Sputnik_V1727.cst