Geometric configuration of device for launching tranverse magnetic waves
Disclosed are one or more preferred geometric configurations for a device communicably coupled to a power transmission line and capable of launching transverse electromagnetic waves onto the transmission line. The waves propagate data received from a data source and may include a reflector and a coupler adjacent to each other through a transverse magnetic wave that propagates longitudinally along the surface of the transmission line.
1. A method for relaying a signal propagated by a transverse magnetic wave guided along the surface of a transmission line, using a coupler and a reflector, the method comprising:
identifying a desired frequency range for the signal;
using the desired frequency range to select a length of the coupler;
using at least one property of the transmission line to select a geometric characteristic of the reflector relative to a geometric characteristic of the coupler;
positioning the coupler and the reflector proximate the transmission line, the coupler length oriented in a direction generally perpendicular to the transmission line; and
applying the signal to the coupler.
2. The method of claim 1 where the geometric characteristic is a length characteristic.
3. The method of claim 2 where the length of the coupler is between half the length of the reflector and the length of the reflector.
4. The method of claim 1 where the geometric characteristic is a width characteristic, the width oriented in a direction generally parallel to the transmission line.
5. The method of claim 4 where the width of the reflector is selected based on at least one of the width of the coupler, the length of the reflector relative to that of the coupler, and a spacing between the reflector and the coupler.
6. The method of claim 4 where the width of the coupler is less than or equal to the width of the reflector.
7. The method of claim 1 where the geometric characteristic is a magnitude of a gap between the coupler and the reflector.
8. The method of claim 7 where the magnitude is less than at least one of the width of the reflector and than the width of the coupler.
9. The method of claim 7 where the magnitude minimizes destructive interference between return currents that reflect off the back edge of the reflector and the primary transmission mode carrying the signal along the surface-wire conductor.
10. A device communicably coupled to a power transmission line and capable of launching transverse electromagnetic waves onto the power transmission line, the electromagnetic waves propagating data received from a data source connected to said device, the device comprising:
a reflector and a coupler adjacent to each other;
the reflector having a reflector length oriented in a direction generally perpendicular to the power transmission line and the coupler having a coupler length oriented in a direction generally perpendicular to the power transmission line; where
the length of the coupler is between half the length of the reflector and the length of the reflector.
11. The device of claim 10 where the length allows a signal having a frequency greater than 1 GHz and a higher than 300 GHz to be propagated in a primary transmission mode along the power transmission line.
12. The device of claim 11 where the frequency comprises at least one of the 2.4 GHz band and the 5 GHz band.
13. The device of claim 10 where the width of the coupler is less than the width of the reflector.
14. The device of claim 10 where the width of the coupler is equal to the width of the reflector.
15. The device of claim 10 where the reflector and coupler are separated by a gap that is less than the width of the reflector and less than the width of the coupler.
16. The device of claim 15 where the magnitude of the gap minimizes destructive interference between return currents that reflect off the back edge of the reflector and the primary transmission mode carrying the signal along the surface-wire conductor.
17. A device communicably coupled to a power transmission line and capable of launching transverse electromagnetic waves onto the power transmission line, the electromagnetic waves propagating data received from a data source connected to said device, the device comprising:
a reflector and a coupler adjacent to each other;
the reflector having a reflector length oriented in a direction generally perpendicular to the power transmission line and the coupler having a coupler width oriented in a direction generally parallel to the power transmission line; where
the width of the coupler is less than or equal to the width of the reflector.
18. The device of claim 17 where the width of the coupler minimizes destructive interference between return currents that reflect off the back edge of the reflector and the primary transmission mode carrying the signal along the surface-wire conductor.
19. The device of claim 17 where the length of the coupler is between half the length of the reflector and the length of the reflector.
20. The device of claim 17 where the reflector and coupler are separated by a gap that is less than the width of the reflector and less than the width of the coupler, where the magnitude of the gap minimizes destructive interference between return currents that reflect off the back edge of the reflector and the primary transmission mode carrying the signal along the surface-wire conductor.