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Results tagged with rf
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user 213617
Short for Radio Frequency, i.e. frequencies at which radiation (intentional or not) plays a role. Typically associated with wireless communications, but also relevant for high-speed PCB design.
1
vote
FR-4 RF attenuation (when used as an enclosure)
The FR-4 causes a discontinuity in the RF link, since its characteristics differ from characteristics of free space (air or vacuum). … Unfortunately I couldn't find any research from which you could directly interpret the effects of FR-4 to the RF link. Many antennas have a polymer cover, which is also a lossy material. …
- 51
0
votes
Looking to make a large surface area 13.56MHz antenna with short range
5'x2' is now 5 feet x 2 feet? That would be 0.92 m2 area, which is quite large. I have made a round near-field coil for HF RFID with a radius of 0.15 m (area of 0.071 m2) and two loops, which was stil …
- 51
1
vote
RFID antenna multiplexer
You said the tags are 6 cm apart and I see you are using 13.56 MHz reader. Your antennas are conductive loops and they must be quite near each other. This introduces the possibility of mutual inductan …
- 51