Abstract: Techniques for designing radio-frequency (RF) antennas for use in micro-localization systems are described. The techniques described herein allow RF designers to estimate how accurate a micro-localization system using the designed antenna will be once manufactured. As such, the techniques described herein enable RF designers to iterate the design of an RF antenna, for example by adjusting certain antenna design parameters in an iterative fashion, until a satisfactory degree of accuracy is achieved. In particular, described herein is angular impulse delay (AID), a metric that quantifies the time delay existing between the emission of an electromagnetic wave at a certain point in space and the reception of this electromagnetic wave at the assumed phase center of the antenna. The benefit of AID is that it allows RF designers to quantify the difference in the delays between different points in space and the phase center of an antenna.

Abstract: This invention relates to small and intermediate conductance, calcium-activated potassium channel proteins. More specifically, the invention relates to compositions and methods for making and detecting calcium-activated potassium channel proteins and the nucleic acids encoding calcium-activated potassium channel proteins. The invention also provides methods and compositions for assaying compounds which increase or decrease potassium ion flux through a calcium-activated potassium channel.