The following is excerpted from Chapter 3: Radio Basics for UHF RFID from the Book, The RF in RFID: Passive UHF RFID in Practice by Daniel M. Dobkin. Order a copy of The RF in RFID: Passive UHF RFID ...
Radio frequency (RF) refers to the part of the electromagnetic spectrum where electromagnetic waves can be generated by alternating current fed to an antenna. It spans from around 3 kHz to 300 GHz. RF ...
Have you ever heard terms like modulation scheme, orthoganal frequency division multiplexing (OFDM), or symbol rate and scratched your head? As new wireless standards emerge, we get excited about the ...
Announcing a new publication from Opto-Electronic Advances; DOI 10.29026/oea.2026.250229. Programmable metasurface (PM), also termed as reconfigurable intelligent surface (RIS), have emerged as a ...
FIG. 1 (a) Functional diagram and (b) Structure diagram of the device. Vortex beams with helical phase wavefronts can carry orbital angular momentum (OAM) and have promising applications in ...
Delivery of television to private homes requires the transmission of video and audio signals. This requires some form of multiplexing of the two messages for transmission down a common communications ...
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