Patent ID: 11955723
Assignee: ASSA ABLOY AB
Field: Telecommunications (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A reader comprising:
a mounting plane configured for mounting the reader to a surface;
a first antenna configured for receiving an ultra-wide band (UWB) signal;
a second antenna configured for receiving the UWB signal, the first antenna and second antenna being arranged along an axis that is generally perpendicular to the mounting plane; and
a material disposed between the first and second antennas;
wherein a distance between the first and second antennas along the axis is less than a half wavelength of the UWB signal through air (λA/2); and
wherein the material is configured to slow down electromagnetic waves passing therethrough such that an effective separation distance of the first and second antennas along the axis is at least a half wavelength of the UWB signal through air (λA/2).