A crystal radio is basically a high Q resonator tied to an antenna and an envelope detector. These days the envelope detector is a point contact diode such as a 1N34 Germanium diode. The resonant ...

The following is excerpted from Chapter 8 from “RF Circuit Design, 2e” by Christopher Bowick. The fundamental operation of an RF front end is fairly straightforward: it detects and processes radio ...

Abstract: Radiofrequency receivers based on energy detection usually require bulky and costly antenna filters. A promising alternative comes from spin-torque diodes that inherently provide both ...

If you ever look at construction notes for building old detector type radios the type of headphones specified always have an impedance of 2 × 2000Ω. Nowadays the most commonly available headphones ...

Abstract: Signal detection at (sub-)mm-wave frequencies via a single chip size component is discussed. The monolithic integration consists of high current density InP-based Triple Barrier Resonant ...

ABSTRACT: The design of multiband microstrip rectenna for radio frequency energy harvesting applications is presented in this paper. The designed antenna has good performance in the GSM-900/1800, WiFi ...

Agilent Technologies Inc. has announced the launch of 1200 Series diode-array and multiple-wavelength detectors featuring improved noise specifications. These liquid chromatography detectors are ...

The myth is that development in early US radio was retarded as the result of the Marconi Co.’s 1916 victory in its suit for infringement against De Forest, inventor of the revolutionary ...