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Admin
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Everything posted by Admin
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FR4 #1,5mm...??
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A broadband antenna is a must for 2350-2550MHz. The main problem of most antennas (as well as the matching system) for this band is the ability to achieve a low VSWR over a wide bandwidth while maintaining a high gain. This limits most antennas to a bandwidth of 100 or 200 MHz. By using quagi dimensions for directors and all spacings, the bandwidth of the driven element can be widened to 200 MHz by changing the driven element and the reflector to the double quad design, then bending them at a 11 degree angle. When this is done, all three radiating elements on the driven element reinforce each other at the first director for added gain on both receive and transmit. In an antenna system with two quad loops driven at the center, there is an impedance of approximately 75 ohms. When used in an array , this can drop to around 50 ohms , which can be driven with 50 ohm coax directly without any matching device. This helps with the simplicity of the easy-to-build broadband design.
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what type of PCB, thickness .. ??
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Yes, but on PCB needs other dimensions ... !!!
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,,,so...!!!
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The screw is not visible ...???
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And what is it ...?
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okay,but this is reality....
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Let's see, it might be...!!!!
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you have to make an adaptation line with PCB...
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connection with 50ohm coaxial cable...??
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,,,so...??? 60mm outer diameter ,,,or so...
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I will simulate such an antenna,,,!!!
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"no, no, I want to see how you typed spirals between them ///
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,,, and how do you make the connection between the spirals .. ??
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16,,,,19dBi it can only be obtained with at least 8 patches....!!!!!
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On this forum seems to be the sizes of these antennas ,,, I do not know for sure !!!
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...these calculations do not correspond to reality....!!!!
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The schematic diagram of the antenna is shown in Figure 1. Two or one sectoral slots are made on the patch surface. The presence of the sectoral slots on the patch causes the antenna to resonate at two adjacent frequencies, which results in the enhancement of the impedance bandwidth
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,,,please translate it...!!!!
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...this one....
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Thank you, but tell me what it"s the distance between the patches...??!!! ,,,and the length of the impedance adjustment lines?
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More details, please....!!!
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I'll try to do a simulation on 2442MHZ of this ...
