Wireless communications device with reflective interference immunity

A tabletop wireless communications device having improved reflective interference immunity, comprising:

• a housing configured to rest on a tabletop in a resting position, said resting position further defining a vertical axis and a horizontal plane;
• electronics adapted to provide radio communications with said device and a second wireless device;
• a circuit layer aligned substantially in the horizontal plane;
• a set of antenna elements incorporated in said layer, said elements arranged in a radially symmetrical configuration;
• transmission feed lines electrically connected to said antenna elements, said transmission feed lines being further balanced with respect to impedance and propagation delay;
• a combiner electrically connected to said antenna elements through said transmission feed lines, said combiner further electrically connected to said electronics whereby said electronics may either transmit or receive radio communications with the second wireless device through said set of antenna elements;
• wherein said wireless communications device achieves immunity from reflective interfering waves without switching said antenna elements.

A tabletop wireless conferencing device having improved reflective interference immunity, comprising:

• a housing configured to rest on a tabletop in a resting position, said resting position further defining a vertical axis and a horizontal plane;
• radio electronics adapted to provide radio communications with said device and a second wireless device;
• a printed circuit board incorporating a circuit layer aligned substantially in the horizontal plane;
• a set of three micro-strip antenna elements incorporated in said layer, said elements arranged in an equilateral triangle configuration, each of said elements oriented perpendicular to a line passing through the element and the center of said set of antenna elements;
• transmission feed lines electrically connected to said antenna elements;
• a combiner electrically connected to said antenna elements through said transmission feed lines, said combiner further electrically connected to said electronics whereby said electronics may either transmit or receive radio communications with the second wireless device through said set of antenna elements;
• speaker electronics adapted to emit an audible representation of a remote audio input, the audio input being received as a signal at said radio electronics;
• audio input electronics adapted to sense sound at said device, said auto input electronics adapted to convert the sensed sound to an audio signal suitable for transmission by said radio electronics.