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I'm work to use my STM32L475 IoT with bluetooth module ( SPBTLE-RF/spi/BlueNRG-MS)
I need some help please
I don't know the principe, someone give me an example (STM32_IOT+LED+Bluetooth+android) :)
Hi,
I can not find the same results from the article: Wideband high gain circularly polarized UHF RFID reader microstrip antenna and array.
Can you help me please
Hi,
Hello. I've got a problem. I need to design a antenna for cicular polarization by HFSS (Axial Ratio Vs Freq.)
My question is that am I free to choose any angle to report the antenna's circular polarization? or just at Θ=φ=0 it should be achieved?
Best regards.
Hi,
have simulated patch antenna. Since it is corner truncated it should have circular polarisation. In papers circular polarisation is determined on the basis of axial ratio. They have the graph of axial ratio versus frequency. it would be of great help if you suggest how to determine the...
I've been measuring my antenna RFID impedance at UHF band recently,i used the
fixture 100mm and calculated the final differential impedance by some formula directly from S11/S22/S12/S21.
BUT, the final calculated impedance is 21+j45 Ohm. The Real part is very similar to my simulation value,the...
Hi,
I want to know how to measure the input impedance of the RFID Tag UHF (860-960 MHz) antenna.
is that it always takes lengths (n * lambda / 4)? 84mm 100mm ...
it just is what connects the masses of semi-rigid cables?
how to calibrate the VNA with semi-rigid cable?
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