Porous‐Element Endfire Receivers for Sound Reception in Rapid Motion

Investigation of Non-linear Parametric Sound Reception

Understanding the receivers and the reception of science's uncertain messages.

Although much work has been done by scientists in developing communications to non-scientist audiences, much less attention has been given by them to the ways in which those messages are interpreted. Here, I look at the published work that examines the issue. I focus on three contexts in particular: debates over the triple vaccine for measles, mumps and rubella, the impacts of the Soufrière Hil...

Rapid prototyping for RF-transmitters and receivers

This paper describes a concept of an RFDP (Radio Frequency Development Platform) for RF-transmitters and RF-receivers. With this platform the time effort for the development process can be reduced and prototypes for different communications standards which are defined at different frequencies can be built faster. Also modifications, e.g. if new analog components are available, can be implemente...

Sound Reception in the Bush Cricket Metrioptera Brachyptera (l.)

The phenomenon of acoustic communication in insects has been tackled broadly on two fronts; the mechanism of sound production with its associated behaviour; and the neurophysiological, anatomical and behavioural features of sound reception. The production of sound with a wide frequency band by bush crickets (Tettigonidae) and grasshoppers (Acrididae) is well known, and the mechanisms for its pr...

Electrically Small Supergain Endfire Arrays

The theory, computer simulations, and experimental measurements are presented for electrically small two-element supergain arrays with near optimal endfire gains of 7 dB. We show how the difficulties of narrow tolerances, large mismatches, low radiation efficiencies, and reduced scattering of electrically small parasitic elements are overcome by using electrically small resonant antennas as the...