1. An antenna comprising:
a center antenna located at a central feed point;
conducting sections of equal length disposed around the central feed point, each conducting section coupled to a respective antenna;
switching elements disposed between the conducting sections; and
a controller in communication with the switching elements to serially connect the conducting sections in spatial configurations having different terminal antennas, the controller in communication with the central feed point to determine a signal communication throughput for each spatial configuration.
2. The antenna of claim 1 wherein the switching elements comprise diodes.
3. The antenna of claim 2 wherein the diodes comprise PIN diodes.
4. The antenna of claim 1 wherein the conducting sections comprise:
a connecting section in communication with the central feed point; and
a peripheral section in communication with the connecting section.
5. The antenna of claim 4 wherein the connecting section defines a spoke and the peripheral section defines a part of a wheel.
6. The antenna of claim 4 wherein the peripheral section defines a part of a polygon.
7. The antenna of claim 4 wherein the peripheral section has a non-linear shape.
8. The antenna of claim 1 wherein the conducting sections comprise strips on a printed circuit board (PCB).
9. The antenna of claim 1 wherein the controller is configured to determine the signal communication throughput as a Packet Error Rate (PER).
10. The antenna of claim 1 wherein the controller is configured to determine the signal communication throughput as a Received Signal Strength Indicator (RSSI).
11. A method comprising:
controlling switching elements to define serially connected conducting sections of equal length and associated coupled antennas, in a first spatial configuration between a central feed point and a first terminal antenna;
determining a first signal communication throughput of the first spatial configuration;
controlling the switching elements to define serially connected conducting sections and associated coupled antennas, in a second spatial configuration between the central feed point and a second terminal antenna; and
determining a second signal communication throughput of the second spatial configuration.
12. The method of claim 10 wherein controlling the switching elements comprises applying voltage to a diode.
13. The method of claim 10 further comprising:
controlling the switching elements to iteratively define serially connected conducting sections and associated coupled antennas in remaining spatial configurations;
determining respective signal communication throughputs of the remaining spatial configurations; and
controlling the switching elements to define serially connected conducting sections and associated coupled antennas of a spatial configuration having a highest signal communication throughput.
14. The method of claim 10 wherein determining the first signal communication throughput comprises determining a Packet Error Rate (PER).
15. The method of claim 10 wherein determining the first signal communication throughput comprises determining a Received Signal Strength Indicator (RSSI).
16. The method of claim 10 wherein controlling the switching elements links a peripheral section with a connecting section in communication with the central feed point.
17. The method of claim 16 wherein peripheral section comprises part of a wheel and the connecting section comprises a spoke.
18. A method of optimizing gain of a series-fed array antenna, the method comprising:
controlling switching elements to serially connect conducting sections of equal length and associated coupled antennas, in different spatial configurations about a central feed point; and
determining a spatial configuration having a highest signal communication throughput.
19. The method of claim 18 wherein controlling the switching elements comprises applying voltage to a diode.
20. The method of claim 18 wherein the conducting sections comprise a wheel and spokes.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A dome-shaped diaphragm of a speaker comprising:
a dome part which is formed in a dome-like shape and is convex forward in an oscillating direction that is a forward direction of sound travel when emitted from the speaker;
a neck part connected to an outer periphery of the dome part for fixing a voice coil bobbin thereto; and
an edge including a roll part which is formed in a curved shape, convex forward in the oscillating direction, and continued to the neck part at an inner peripheral edge thereof, and a flange part which is provided at an outer peripheral edge of the roll part to be fixed to a speaker frame;
wherein the neck part is provided with a curved portion which is convex backward in the oscillating direction, and an outer periphery of the curved portion is continued to an inner periphery of the roll part, and
wherein an inner periphery of the curved portion is connected to an outer face of the voice coil bobbin.
2. The dome-shaped diaphragm according to claim 1, wherein the curved portion of the neck part has a curved face a radius of curvature of which is smaller than that of a curved face of the roll part.
3. The dome-shaped diaphragm according to claim 1, wherein a curvature of the roll part is set so that an apex of the roll part is lower in height than an apex of the dome part.
4. The dome-shaped diaphragm according to claim 1, wherein the curved portion is smoothly connected to the inner periphery of the roll part without forming a corner.
5. A speaker comprising:
a magnetic circuit;
a speaker frame;
a voice coil bobbin having a voice coil wound around the voice coil bobbin, the voice coil bobbin being oscillated by the magnetic circuit; and
a diaphragm attached to the voice coil bobbin and the speaker frame, the diaphragm including:
a dome part which is formed in a dome-like shape and is convex forward in an oscillating direction that is a forward direction of sound travel when emitted from the speaker;
a neck part connected to an outer periphery of the dome part for fixing the voice coil bobbin thereto; and
an edge including a roll part which is formed in a curved shape, convex forward in the oscillating direction, and continued to the neck part at an inner peripheral edge thereof, and a flange part which is provided at an outer peripheral edge of the roll part to be fixed to the speaker frame;
wherein the neck part is provided with a curved portion which is convex backward in the oscillating direction, and an outer periphery of the curved portion is continued to an inner periphery of the roll, and
wherein an inner periphery of the curved portion is connected to an outer face of the voice coil bobbin.
6. A dome-shaped diaphragm comprising:
a dome part which is formed in a dome-like shape and is convex in a first direction;
a neck part connected to an outer periphery of the dome part for fixing a voice coil bobbin thereto; and
an edge including a roll part which is formed in a curved shape, is convex in the first direction, and continued to the neck part at an inner peripheral edge thereof, and a flange part which is provided at an outer peripheral edge of the roll part to be fixed to a speaker frame;
wherein the neck part is provided with a curved portion which is convex in a second direction that is opposite to the first direction, and an outer periphery of the curved portion is continued to an inner periphery of the roll part.