IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0917291
(2001-07-26)
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발명자
/ 주소 |
- McKinzie, III, William E.
- Mendolia, Greg
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
29 인용 특허 :
10 |
초록
▼
An artificial anisotropic dielectric material can be used as a microstrip patch antenna substrate. The artificial dielectric can be easily designed for the purpose of weight reduction. Preferably, the artificial dielectric is comprised of a periodic stack of low and high permittivity layers. The lay
An artificial anisotropic dielectric material can be used as a microstrip patch antenna substrate. The artificial dielectric can be easily designed for the purpose of weight reduction. Preferably, the artificial dielectric is comprised of a periodic stack of low and high permittivity layers. The layers can be oriented vertically below the patch to support electric fields consistent with desired resonant modes. Substrates may be engineered for both linearly and circularly polarized patch antennas. Antenna weight can be reduced to 1/6th up to 1/30th of the original weight using different types of high permittivity layers. This concept has numerous applications in electrically small and lightweight antenna elements such as PIFA antennas. In accordance with one aspect of the invention, the artificial dielectric is comprised of an interlocking structure of low and high permittivity layers for ease of assembly and for overall stability. In accordance with another aspects the high permittivity layers can be comprised of FSS cards, and can include metallized tabs for further simplification of assembly.
대표청구항
▼
An artificial anisotropic dielectric material can be used as a microstrip patch antenna substrate. The artificial dielectric can be easily designed for the purpose of weight reduction. Preferably, the artificial dielectric is comprised of a periodic stack of low and high permittivity layers. The lay
An artificial anisotropic dielectric material can be used as a microstrip patch antenna substrate. The artificial dielectric can be easily designed for the purpose of weight reduction. Preferably, the artificial dielectric is comprised of a periodic stack of low and high permittivity layers. The layers can be oriented vertically below the patch to support electric fields consistent with desired resonant modes. Substrates may be engineered for both linearly and circularly polarized patch antennas. Antenna weight can be reduced to 1/6th up to 1/30th of the original weight using different types of high permittivity layers. This concept has numerous applications in electrically small and lightweight antenna elements such as PIFA antennas. In accordance with one aspect of the invention, the artificial dielectric is comprised of an interlocking structure of low and high permittivity layers for ease of assembly and for overall stability. In accordance with another aspects the high permittivity layers can be comprised of FSS cards, and can include metallized tabs for further simplification of assembly. rticulate matter, there will be a difference in the masses of the mail piece as determined by the vibrating tray scale, indicating the mail piece may contain a lose particulate matter. The mail piece can then be diverted from the normal processing path for further inspection, thereby preventing cross-contamination of other mail pieces and processing equipment. d in a first housing attached to a subject of the emergency event; the transmitter is disposed in a second housing; the transmitter is connected to the actuator by a cable; and the second housing is a buoyant cradle. 19. The apparatus of claim 18, wherein the actuator includes a water-activated switch to sense the event, wherein the event is contact of the apparatus with water. 20. The apparatus of claim 18 wherein the actuator includes a motion detector to sense the event, wherein the event is an absence of motion of the apparatus. 21. The apparatus of claim 18, wherein the actuator senses a signal corresponding to a change in a monitored physiological parameter of a person coupled to the apparatus. 22. The apparatus of claim 18, further including a global positioning system receiver. 23. The apparatus of claim 18, wherein the signal generator generates the report signal according to standard digital selective calling protocol, and the transmitter is a digital Detective calling transmitter. 24. The apparatus of claim 18, further comprising a remote receiver for receiving the report signal and for formatting the received report signal according to digital selective calling protocol. 25. A reporting unit for automatically providing a report of an emergency event to a remote location, comprising: an actuator, including a sensor for sensing the event and providing an actuation signal in response to the sensed event; a controller, including a signal generator for formatting a digital selective calling protocol signal corresponding to the event, in response to the actuation signal; and a transmitter for transmitting the digital selective calling protocol signal to the remote location; wherein the actuator is disposed in a first housing attached to a subject of the emergency event; the transmitter is disposed in a second housing; the transmitter is connected to the actuator by a cable; and the second housing is a buoyant cradle. 26. The apparatus of claim 25, wherein the actuator includes a water-activated switch to sense the event, wherein the event is contact of the apparatus with water. 27. The apparatus of claim 25, wherein the actuator includes a motion detector to sense the event, wherein the event is an absence of motion of the apparatus. 28. The apparatus of claim 25, wherein the actuator senses a signal corresponding to a change in a monitored physiological parameter of a person coupled to the apparatus. 29. The apparatus of claim 25, further including a global positioning system receiver. 30. The apparatus of claim 25, further comprising a remote receiver for receiving the report signal and for formatting the received report signal according to digital selective calling protocol. 31. A process of automatically reporting an emergency event, comprising: sensing the event at a location of a subject of the event; providing an actuation signal in response to the sensed event from a first housing disposed at the location of the subject of the event; formatting data corresponding to the event in response to the actuation signal, to form a report signal; and transmitting the report signal from a second housing that is disposed in a buoyant cradle and connected to the first housing by a cable. 32. The process of claim 31, wherein sensing the event includes sensing contact of the subject of the event with water. 33. The process of claim 32, wherein the subject of the event is a person. 34. The process of claim 32, wherein the subject of the event is a cargo container. 35. The process of claim 31, wherein sensing the event includes sensing an absence of motion of the subject of the event. 36. The process of claim 31, wherein sensing the event includes sensing a change in a monitored physiological parameter of the subject of the event. 37. The process of claim 31, wherein data corresponding to the event includes global positioning system data. 38. The process of claim 31, wherein formatting data correspondi ng to the event includes formatting the data according to standard digital selective calling protocol. 39. The process of claim 38, wherein formatting data corresponding to the event includes formatting the data automatically. 40. The process of claim 31, further comprising: remotely receiving the report signal; and formatting the received report signal according to digital selective calling protocol. 41. The process of claim 31, wherein formatting data corresponding to the event to form the report signal includes including data content related to the event in the report signal. 42. The process of claim 41, further including arranging the data content in a data field. 43. The process of claim 41, further including arranging the data content in a plurality of data fields. 44. The process of claim 31, further including providing the formatted report signal directly to the transmitter. 45. The process of claim 31, wherein providing an actuation signal in response to the sensed event includes providing a plurality of actuation signals in response to a respective plurality of sensed events. 46. The process of claim 45, wherein formatting data the corresponding to the event to form the report signal includes including data content related to the event in the report signal, wherein the data content includes an identification of the sensed event. 47. The process of claim 31, wherein the actuation signal is a binary signal. 48. The process of claim 47, wherein the binary signal indicates only the presence or absence of the event. 49. The process of claim 48, wherein the data is formatted based solely on the binary signal. 50. The process of claim 31, further comprising modulating the report signal with a carrier signal, prior to transmitting the report signal. 51. A process of automatically reporting an emergency event, comprising: sensing the event at a location of a subject of the event; providing an actuation signal in response to the sensed event from a first housing disposed at the location of the subject of the event; generating a formatted data report signal in response to the actuation signal; and transmitting the report signal from a second housing that is disposed in a buoyant cradle and connected to the first housing by a cable. 52. The process of claim 51, wherein sensing the event includes sensing contact of the subject of the event with water. 53. The process of claim 52, wherein the subject of the event is a person. 54. The process of claim 52, wherein the subject of the event is a cargo container. 55. The process of claim 52, wherein transmitting the report signal includes initiating the transmission from within the buoyant cradle, which is remote from and in communication with the source of the generation of the report signal. 56. The process of claim 51, wherein sensing the event includes sensing an absence of motion of the subject of the event. 57. The process of claim 51, wherein sensing the event includes sensing a change in a monitored physiological parameter of the subject of the event. 58. The process of claim 51, wherein the report signal includes global positioning system data. 59. The process of claim 51, wherein generating the report signal includes formatting the report signal according to standard digital selective calling protocol. 60. The process of claim 51, further comprising: remotely receiving the report signal; and formatting the received report signal according to digital selective calling protocol. 61. A process of automatically providing a report of an emergency event to a remote location, comprising: sensing the event at a location of a subject of the event and providing an actuation signal in response to the sensed event from a first housing disposed at the location of the subject of the event; formatting a digital selective calling protocol signal corresponding to the event, in response to the actuation signal; and transmitting the digital selective calling protocol si gnal to the remote location from a second housing that is disposed in a buoyant cradle and connected to the first housing by a cable. 62. The process of claim 61, wherein sensing the event includes sensing contact of the subject of the event with water. 63. The process of claim 62, wherein the subject of the event is a person. 64. The process of claim 62, wherein the subject of the event is a cargo container. 65. The process of claim 61, wherein sensing the event includes sensing an absence of motion of the subject of the event. 66. The process of claim 61, wherein sensing the event includes sensing a change in a monitored physiological parameter of the subject of the event. 67. The process of claim 61, further comprising: remotely receiving the report signal; and formatting the received report signal according to digital selective calling protocol.
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