초록 ▼

A time of arrival measurement apparatus is used to measure the time of arrival of a radio signal transmitted by a mobile communication station operating in a wireless mobile communication network. The apparatus is provided with information indicative of a predetermined point in time at which the rad

A time of arrival measurement apparatus is used to measure the time of arrival of a radio signal transmitted by a mobile communication station operating in a wireless mobile communication network. The apparatus is provided with information indicative of a predetermined point in time at which the radio signal is to be transmitted. The time of arrival measurement apparatus monitors for arrival of the radio signal only during a period of time after the predetermined point in time.

대표청구항 ▼

A time of arrival measurement apparatus is used to measure the time of arrival of a radio signal transmitted by a mobile communication station operating in a wireless mobile communication network. The apparatus is provided with information indicative of a predetermined point in time at which the rad

A time of arrival measurement apparatus is used to measure the time of arrival of a radio signal transmitted by a mobile communication station operating in a wireless mobile communication network. The apparatus is provided with information indicative of a predetermined point in time at which the radio signal is to be transmitted. The time of arrival measurement apparatus monitors for arrival of the radio signal only during a period of time after the predetermined point in time. source of input signals and said amplifier; each one of said plurality of matching networks exclusively providing said AGC arrangement with a respective group of RF signals which includes a plurality of receivable broadcast channels, wherein: the gain of said amplifier is controlled in response to the level of said group of RF signals. 2. In an antenna system for providing VHF/UHF signals for a receiver, said receiver having a remote control transmitter for generating control signals for selecting individual ones of said VHF/UHF signals corresponding to respective broadcast channels, apparatus comprising: a plurality of matching networks coupled between an input to which an antenna may be coupled and an output circuit for providing impedance matching between said antenna and said output circuit; each one of said plurality of matching networks exclusively providing said output circuit with a respective group of RF signals which includes a plurality of receivable broadcast channels; and control means coupled to said plurality of matching networks and responsive to said control signals generated by said remote control transmitter for selecting said individual ones of said VHF/UHF signals corresponding to respective channels for selecting ones of said plurality of matching networks. sins, polyolefin resins and polyurethane resins. which defines a plurality of spaced-apart ribs for frictionally engaging and holding said sheath over said conduit. 13. The lasing device of claim 11 wherein said sheath includes an inner surface end and said conduit includes an outer surface and a plurality of spaced-apart ribs extending outwardly therefrom and abutting said inner surface of said sheath for holding said sheath over said conduit. 14. A lasing device comprising a laser energy conduit adapted for connection to a laser energy source and including a proximal end for coupling to the laser energy source and a distal end covered by a removable sheath with a distal end portion which is substantially transparent to the wave length of the laser energy emitted through said distal end of said conduit, wherein one of said sheath or said conduit includes at least one rib formed thereon for frictionally engaging and holding said sheath over said conduit, and wherein said sheath includes a proximal end and an inner surface having a plurality of grooves formed therein, said conduit including an outer surface having a plurality of ribs extending outwardly therefrom and received in said grooves respectively for removably securing said sheath over said conduit. 15. A laser device comprising a fiber optic conduit adapted for coupling to a source of laser energy and a hollow sheath covering the distal end of said conduit and removably retained thereon, said sheath including a distal end portion substantially transparent to the laser energy emitted from said conduit. 16. The laser device of claim 15 wherein said distal end portion of said sheath defines a pocket; and a lens for diverging the laser energy emitted from said conduit is situated in said pocket. 17. The laser device of claim 16 wherein a ceramic sleeve surrounds the lens situated in said pocket. 18. The laser device of claim 16 wherein an exterior portion of the lens is sandblasted. 19. The laser device of claim 16 wherein a distal end portion of the lens is provided with a carbon coating. 20. The laser device of claim 16 wherein said pocket is adapted to receive a generally spherically shaped lens. 21. The laser device of claim 15 wherein said distal end portion of said sheath includes a cap substantially transparent to the laser energy emitted from said conduit. 22. The laser device of claim 15 wherein said sheath includes an inner surface defining an opening in said distal end portion thereof and a film cap covering said opening and comprising a material transparent to the laser energy emitted from said conduit. 23. The laser device of claim 15 wherein said conduit includes an outer surface and said sheath includes an inner surface, both having a plurality of coacting ribs for removably securing said sheath over said conduit. 24. The laser device of claim 15 wherein said sheath includes an inner surface and said conduit includes an outer surface having a plurality of ribs extending outwardly therefrom and abutting said inner surface of said sheath for removably securing said sheath over said conduit. 25. The laser device of claim 15 wherein the inner surface of the sheath has at least one circumferential rib for frictionally engaging and removably securing said sheath over said conduit. 26. The laser device of claim 15 wherein said sheath is a capillary tube with a closed distal end. 27. The laser device of claim 15 wherein said sheath is removably retained by friction fit. 28. A laser device comprising a fiber optic conduit adapted for coupling to a source of laser energy and a hollow removable sheath covering the distal end of said conduit and removably retained thereon, said sheath including a distal end portion defining a pocket, and wherein a segment of a cylindrical rod material transparent to the wave length of laser energy is situated in the pocket. 29. The laser device of claim 28 wherein the distal end face of the rod material is sandblasted. 30. The laser device of claim 28 wherein the distal end face of th e rod is provided with a carbon coating. 31. The laser device of claim 28 wherein the distal end face of the rod is convex and is provided with a carbon coating. 32. The laser device of claim 28 wherein the distal end face of the rod is rounded. 33. The laser device of claim 28 wherein said rod is composed of a material selected from quartz, fused silica, or synthetic sapphire. 34. The laser device of claim 28 wherein said material is fused silica. 35. The laser device of claim 28 wherein a ceramic sleeve surrounds the exterior of the cylindrical rod. 36. A method of performing a myringotomy which comprises the steps of removably mounting a sheath transparent to laser energy onto a fiber optic; passing a laser energy beam through said fiber optic and said sheath and projecting said beam onto an ear drum to be perforated; and maintaining incidence of the projected beam onto the ear drum for a time period sufficient to perforate the ear drum. 37. The myringotomy method in accordance with claim 36 wherein the laser energy beam has power output in the range of about 1 to about 20 watts. 38. The myringotomy method in accordance with claim 36 wherein the laser energy beam has power output in the range of about 2 to about 10 watts. 39. The myringotomy method in accordance with claim 36 wherein a relatively lower power aiming beam is projected onto the ear drum coaxially with the laser energy beam. 40. The myringotomy method in accordance with claim 39 wherein the aiming beam is a red helium-neon laser beam. 41. A lasing device comprising a source of laser energy, a laser energy conduit including a proximal end adapted for connection to the laser energy source, a distal end covered by a removable sheath defining a pocket, and a lens transparent to the wave length of laser energy for directing the beam of laser energy emitted from said conduit held in said pocket. 42. The lasing device of claim 41 wherein a ceramic sleeve surrounds the lens held in said pocket. 43. The lasing device of claim 41 wherein an exterior portion of the lens is sandblasted. 44. The lasing device of claim 41 wherein a distal end portion of the lens is provided with a carbon coating. 45. The lasing device of claim 41 wherein said pocket is adapted to receive a generally spherically shaped lens. 46. The lasing device of claim 45 wherein said sheath includes an inner surface defining an opening in said distal end portion and a rib extending outwardly from said inner surface adjacent to and spaced from said opening, said lens being received in said pocket between said rib and said opening. 47. The lasing device of claim 41 wherein the lens is composed of a material selected from quartz, fused silica and synthetic sapphire. 48. A lasing device comprising a laser energy conduit adapted for connection to a laser energy source and including a proximal end for coupling to the laser energy source and a distal end covered by a removable sheath with a distal end portion which is substantially transparent to the wave length of the laser energy emitted through said distal end of said conduit, wherein one of said removable sheath or said conduit includes at least one rib formed thereon for frictionally engaging and holding said sheath over said conduit. 49. The lasing device of claim 48 wherein said removable sheath includes a proximal end and an inner surface having a plurality of grooves formed therein, said conduit including an outer surface having a plurality of ribs extending outwardly therefrom and received in said grooves respectively for removably securing said sheath over said conduit. 50. A laser device comprising a fiber optic conduit adapted for coupling to a source of laser energy and a hollow removable sheath covering the distal end of said conduit and removably retained thereon, said sheath including a distal end portion defining an pocket and wherein a segment of a cylindrical rod material transparent to the wave length of laser energy is situated in the