Professor John Gregg

Abstract:

Apparatus comprising: a radio frequency (RF) Robinson oscillator comprising: a resonator comprising a sensor rhumbatron, the sensor rhumbatron comprising a cavity member, the cavity member having a re-entrant boss member, the re-entrant boss member being arranged to project into a cavity portion …

Abstract:

A rotor blade sensor for detecting a rotor blade (430) comprising an electrical oscillator arranged to generate an oscillating signal. An antenna (300) includes a coil (100) having one or two winding layers coupled to the electrical oscillator. The antenna (300) may instead or as well include a …

Abstract:

Scanning tunnelling microscope (STM) comprising a first tip (10) for receiving a spin-polarised tunnelling current from a sample (50). Spin injector (20) is provided for injecting a spin-polarised current into the sample (50) and placeable in proximity with the sample (50).