Disclosed are apparatus and methodology subject matters relating to an antenna configured for mounting under the glass in a utility meter. The antenna is configured as a patch antenna where a radiating element is mounted on one side of a plastic substrate while a conductive ground plane element is m
Disclosed are apparatus and methodology subject matters relating to an antenna configured for mounting under the glass in a utility meter. The antenna is configured as a patch antenna where a radiating element is mounted on one side of a plastic substrate while a conductive ground plane element is mounted on the other side of the substrate. The ground plane element faces the meter electronics and thereby provides protection to the electronics from the electromagnetic field of the antenna. Both the radiating element and ground plane element may be provided by hot stamping conductive material directly on to the front and rear surfaces of the substrate. The antenna may be feed by a microstrip feedline mounted on the printed circuit board supporting other meter components.
대표청구항▼
1. An improved-antenna for mounting under the housing of utility meters for coupling thereof by radio frequency signals to other system components, said antenna comprising: an insulating substrate having major front and rear surfaces, and respective lateral ends;a first conductive layer secured on s
1. An improved-antenna for mounting under the housing of utility meters for coupling thereof by radio frequency signals to other system components, said antenna comprising: an insulating substrate having major front and rear surfaces, and respective lateral ends;a first conductive layer secured on said rear surface of said substrate, and defining a slot shaped opening therein, said slot shaped opening starting from a first edge of said substrate and extending toward but not reaching a second edge of said substrate, said first conductive layer except for said slot shaped opening thereof covering substantially the entire rear surface of said substrate; anda second conductive layer secured on said front surface of said substrate, and covering substantially equally portions of said substrate from said slot shaped opening of said first conductive layer toward said lateral ends of said substrate but short of said lateral ends so as to leave predetermined substantially equal area substrate portions left uncovered on said substrate front surface. 2. The antenna is in claim 1, wherein: said insulating substrate is generally arc-shaped. 3. The antenna as in claim 2, wherein the length of said second conductive layer is approximately half-wavelength of the operating frequency of said antenna. 4. The antenna as in claim 1, further including mechanical devices for respectively securing said first and second conductive layers directly on said substrate. 5. The antenna as in claim 1, wherein said first and second conductive layers respectively comprise hot stamped material supported directly on said substrate. 6. The antenna as in claim 1, wherein said substrate comprises a plastic material, and said first and second conductive layers respectively comprise one of aluminum, copper, and brass. 7. A meter with an under the housing antenna for use employing a radio frequency local area network, comprising: a metrology printed circuit board including components relating to the collection and display of metrology information;radio transmission components received on said circuit board;a microstrip feedline connected with said radio transmission components and received on said circuit board; andan antenna secured to said printed circuit board for support thereof, and electrically grounded thereto, said antenna including an insulating substrate, with respective first and second conductive layers on opposite surfaces of said substrate;wherein said first conductive layer comprises a ground plane of said antenna, and said second conductive layer comprises a radiating element of said antenna, said first conductive layer being positioned between said second conductive layer and the metrology printed circuit board to isolate said metrology printed circuit board from an electromagnetic field generated by said second conductive layer. 8. The meter as in claim 7, wherein: said substrate has major rear and front surfaces, on which said first and second conductive layers are respectively supported, and said substrate has respective lateral ends;said first conductive layer secured on said rear surface of said substrate defines a slot shaped opening therein, said first conductive layer except for said slot shaped opening thereof covering substantially the entire rear surface of said substrate; andsaid second conductive layer secured on said front surface of said substrate covers substantially equally portions of said substrate from said slot shaped opening of said first conductive layer toward said lateral ends of said substrate but short of said lateral ends so as to leave predetermined substantially equal area substrate portions left uncovered on said substrate front surface. 9. The meter as in claim 8, wherein: said insulating substrate is generally arc-shaped. 10. The meter as in claim 8, wherein the length of said second conductive layer is approximately half-wavelength of the operating frequency of said antenna. 11. The meter as in claim 7, wherein said insulating substrate comprises a plastic material, and said first and second conductive layers respectively comprise one of aluminum, copper, and brass. 12. Methodology for providing a patch antenna for mounting under the housing of utility meters for coupling thereof by radio frequency signals to other system components, comprising: providing an insulating substrate having major front and rear surfaces, and respective lateral ends;securing a first conductive layer on such rear surface of the substrate, covering substantially the entire rear surface of such substrate except for a slot shaped opening defined in such first conductive layer, said slot shaped opening starting from a first edge of said substrate and extending toward but not reaching a second edge of said substrate; andsecuring a second conductive layer on such front surface of the substrate, such that substantially equal portions of such substrate are covered from the slot shaped opening of such first conductive layer toward the lateral ends of such substrate but short of such lateral ends so as to leave predetermined substantially equal area substrate portions left uncovered on the substrate front surface. 13. The methodology as in claim 12, wherein: the insulating substrate is generally arc-shaped. 14. The methodology as in claim 13, wherein the length of the second conductive layer is approximately half-wavelength of the operating frequency of the antenna. 15. The methodology as in claim 12, further including respectively securing the first and second conductive layers directly on the substrate through the use of mechanical devices. 16. The methodology as in claim 12, further comprising providing the first and second conductive layers respectively as hot stamped material supported directly on the substrate. 17. The methodology as in claim 12, wherein the substrate comprises a plastic material, and the first and second conductive layers respectively comprise one of aluminum, copper, and brass. 18. Methodology for providing a meter with an under the housing antenna for use with framework employing a radio frequency local area network, comprising: providing a metrology printed circuit board having thereon components relating to the collection and display of metrology information;providing radio transmission components;supporting on such circuit board a microstrip feedline connected with such radio transmission components;providing an antenna including an insulating substrate, and respective first and second conductive layers on opposite surfaces of such substrate; andsecuring the antenna to the printed circuit board for support thereof, and electrically grounded thereto,wherein said first conductive layer comprises a ground plane of said antenna, and said second conductive layer comprises a radiating element of said antenna, said first conductive layer being disposed between said second conductive layer and said metrology printed circuit board of said utility meter to isolate such metrology printed circuit board from an electromagnetic field generated by said second conductive layer. 19. The methodology as in claim 18, further comprising: providing such substrate with major rear and front surfaces, and with such first and second conductive layers respectively supported thereon, and providing the substrate with respective lateral ends;providing such first conductive layer secured on the rear surface of such substrate so as to define a slot shaped opening therein, with the first conductive layer except for the slot shaped opening thereof covering substantially the entire rear surface of such substrate; andproviding such second conductive layer secured on the front surface of such substrate so as to cover substantially equally portions of such substrate from the slot shaped opening of such first conductive layer toward the lateral ends of the substrate but short of such lateral ends so as to leave predetermined substantially equal area substrate portions left uncovered on such substrate front surface. 20. The methodology as in claim 19, wherein: the insulating substrate is generally arc-shaped. 21. The methodology as in claim 19, wherein: the length of the second conductive layer is approximately half-wavelength of the operating frequency of such antenna; andthe insulating substrate comprises a plastic material, and the first and second conductive layers respectively comprise one of aluminum, copper, and brass.
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