Wireless UWB Connection for Rotating RF Antenna Array

• US 20090189820A1
• Filed: 01/25/2008
• Published: 07/30/2009
• Est. Priority Date: 01/25/2008
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Research Laboratories, Inc. (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Electric Research Laboratories, Inc. (Mitsubishi Electric Corporation)
• Inventors: Zhang, Jinyun, Molisch, Andreas F., Saito, Masashi
• Granted Patent: US 7,623,081 B2
• Time in Patent Office: Days
• US Class Current: 343/757
• CPC Class Codes: H01Q 3/04 for varying one co-ordinate of the orientation

Abstract

A movable portion of an array of antenna elements receives RF signals. A movable ultra-wideband (UWB) transmitter is connected to each antenna element, via a RF to UWB converter. A fixed portion of the antenna array is separated from the movable portion by an air gap. The fixed portion includes one fixed UWB receiver for each movable UWB transmitter. An application system is connected to the fixed UWB receivers. The UWB signals from the movable transmitter are sent across the air gap to the fixed UWB receivers to be processed by the application system as the movable portion rotates.

Claims

1. An apparatus, comprising:

a movable portion comprising;

an array of RF antenna elements configured to receive RF signals; and

a movable ultra-wideband (UWB) transmitter connected to each RF antenna element via means for converting between the RF signals to UWB signals, each movable UWB transmitter including one UWB antenna;

a fixed portion, separated from the movable portion by an air gap, and further comprising;

one fixed UWB receiver for each movable UWB transmitter, each fixed UWB receiver including one UWB antenna; and

an application system connected to the fixed UWB receiver, and in which tile movable UWB transmitters are configured to communicate the converted RF signals as the UWB signals across the air gap to be processed by the application system while the movable portion moves.

2. The apparatus of claim 1, in which a pattern of placement of the UWB antennas corresponds to a motion of the movable portion.

3. The apparatus of claim 1, in which the UWB antennas are arranged in a circular pattern and the movable portion rotates.

4. The apparatus of claim 1, in which the UWB antennas are arranged in an arc and the movable portion oscillates.

5. The apparatus of claim 3, in which an additional UWB antenna is arranged at a center of the circular patterns.

6. The apparatus of claim 1, in which the UWB antennas are configure to use MIMO techniques.

7. The apparatus of claim 1, in which the UWB transmitters and receivers share a single UWB frequency band, and in which the single UWB frequency band is partitioned into three subband, and any group of three spatially adjacent UWB antennas uses different subbands.

8. The apparatus of claim 7, in which a data rate of the UWB signals is inversely proportional to a size of the air gap.

9. The apparatus of claim 7, in the subbands used by the fixed UWB transceivers are adjusted to correspond to the subbands of the movable transceivers as the movable transceivers move.

10. The apparatus of claim 7, in which the UWB signals of adjacent UWB antennas are combined.

11. The apparatus of claim 5, in which the central antenna is used for control signals.

12. A method for operating a RF antenna array, comprising:

receiving RF signals by a movable array of antenna elements;

converting the RF signals received by each antenna element to an ultra-wideband (UWB) signal;

transmitting the UWB signals to fixed UWB receivers as the antenna elements move; and

receiving the UWB signals by the fixed transceivers to be processed by an application system.