Loop antenna for mobile handset and other applications
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01Q-007/00
H01Q-005/378
H01Q-001/38
H01Q-005/321
H01Q-005/364
H01Q-001/24
H01Q-009/26
H01Q-005/392
출원번호
US-0789817
(2015-07-01)
등록번호
US-9543650
(2017-01-10)
우선권정보
GB-1017472.0 (2010-10-15)
발명자
/ 주소
Harper, Marc
Iellici, Devis
Tomlin, Christopher
출원인 / 주소
Microsoft Technology Licensing, LLC
대리인 / 주소
Roper, Brandon
인용정보
피인용 횟수 :
0인용 특허 :
17
초록▼
There is disclosed an antenna system for mobile handsets and other devices. The antenna system comprises a dielectric substrate having first and second opposed surfaces, a conductive track on the substrate, and a separate, directly driven antenna to drive the parasitic loop antenna formed by the con
There is disclosed an antenna system for mobile handsets and other devices. The antenna system comprises a dielectric substrate having first and second opposed surfaces, a conductive track on the substrate, and a separate, directly driven antenna to drive the parasitic loop antenna formed by the conductive track. Two grounding points are provided adjacent to each other on the first surface of the substrate, with the arms of the conductive track extending in generally opposite directions from the grounding points. The conductive tracks then extend towards an edge of the dielectric substrate, before passing to the second surface of the dielectric substrate and then passing across the second surface of the dielectric substrate following a path generally following the path taken on the first surface of the dielectric substrate. The conductive tracks then connect to respective sides of a conductive arrangement formed on the second surface of the dielectric substrate that extends into a central part of a loop formed by the conductive track on the second surface of the dielectric substrate.
대표청구항▼
1. An antenna system comprising: a parasitic loop antenna formed as a conductive track on a dielectric substrate having first and second opposed surfaces, the dielectric substrate having a first ground point and a second ground point adjacent to each other on the first surface of the dielectric subs
1. An antenna system comprising: a parasitic loop antenna formed as a conductive track on a dielectric substrate having first and second opposed surfaces, the dielectric substrate having a first ground point and a second ground point adjacent to each other on the first surface of the dielectric substrate, the conductive track being formed on the dielectric substrate and having a first arm and a second arm,the first arm being formed on the dielectric substrate and following a first path starting at the first ground point, extending toward a first edge of the dielectric substrate, extending to the second surface of the dielectric substrate, extending across the second surface of the dielectric substrate along a second path, and connecting to a conductive loading plate, anda second arm formed on the dielectric substrate and following a third path starting at the second ground point, extending toward a second edge of the dielectric substrate, extending to the second surface of the dielectric substrate, extending across the second surface of the dielectric substrate along a fourth path, and connecting to the conductive loading plate, the conductive loading plate being formed on the second surface of the dielectric substrate and extending into a central part of a loop formed by the conductive track on the second surface of the dielectric substrate; anda separate, directly driven antenna configured to excite the parasitic loop antenna. 2. The antenna system of claim 1, wherein the separate, directly driven antenna takes the form of a smaller loop antenna located adjacent to a portion of the conductive track, the smaller loop antenna having a feed point and a ground point and being configured to drive the parasitic loop antenna by inductively coupling with the conductive track. 3. The antenna system of claim 1, wherein the separate, directly driven antenna takes the form of a monopole antenna located and configured to drive the parasitic loop antenna by capacitively coupling with the conductive track. 4. The antenna system of claim 1, wherein the parasitic loop antenna is grounded though a complex load, the complex load selected from the list comprising: at least one inductor, at least one capacitor; at least one length of transmission line; and any combination of these in series or in parallel. 5. The antenna system of claim 4, wherein the grounding point of the parasitic loop antenna is switchable between different complex loads so as to enable the parasitic loop antenna to cover different frequency bands. 6. The antenna system of claim 1, wherein a central notch is formed in the dielectric substrate. 7. The antenna system of claim 1, wherein a cut-out is formed in the second surface of the dielectric substrate on either side of a center line thereon. 8. The antenna system of claim 1, further comprising at least one capacitive or inductive stub mounted on the dielectric substrate. 9. The antenna system of claim 1, wherein the parasitic loop antenna is mounted on one side of a main dielectric substrate, in combination with a third antenna mounted in opposition on the other side of the main dielectric substrate. 10. An antenna system comprising: a parasitic loop antenna formed as a conductive track on a dielectric substrate having first and second opposed surfaces, the dielectric substrate having a first ground point and a second ground point adjacent to each other on the first surface of the dielectric substrate, the conductive track being formed on the dielectric substrate and having a first arm and a second arm,the first arm being formed on the dielectric substrate and following a first path starting at the first ground point, extending toward a first edge of the dielectric substrate, extending to the second surface of the dielectric substrate, extending across the second surface of the dielectric substrate along a second path, and connecting to a conductive arrangement, anda second arm formed on the dielectric substrate and following a third path starting at the second ground point, extending toward a second edge of the dielectric substrate, extending to the second surface of the dielectric substrate, extending across the second surface of the dielectric substrate along a fourth path, and connecting to the conductive arrangement, the conductive arrangement comprising both inductive and capacitive elements and being formed on the second surface of the dielectric substrate and extending into a central part of a loop formed by the conductive track on the second surface of the dielectric substrate; anda separate, directly driven antenna configured to excite the parasitic loop antenna. 11. The antenna system of claim 10, wherein the separate, directly driven antenna forms of a smaller loop antenna located adjacent to a portion of the conductive track, the smaller loop antenna having a feed point and a ground point and being configured to drive the parasitic loop antenna by inductively coupling with the conductive track. 12. The antenna system of claim 10, wherein the separate, directly driven antenna takes the form of a monopole antenna located and configured to drive the parasitic loop antenna by capacitively coupling with the conductive track. 13. The antenna system of claim 10, wherein the parasitic loop antenna is grounded through a complex load selected from the list comprising: at least one inductor, at least one capacitor; at least one length of transmission line; and any combination of these in series or in parallel. 14. The antenna system of claim 10, wherein the grounding point of the parasitic loop antenna is switchable between different complex loads so as to enable the antenna to cover different frequency bands. 15. The antenna system of claim 10, wherein a central notch is formed in the dielectric substrate. 16. The antenna system of claim 10, wherein a cut-out is formed in the second surface of the dielectric substrate on either side of a center line thereon. 17. The antenna system of claim 10, wherein a volume cut-out is formed through the dielectric substrate so as to create a volume in which a connector may be located. 18. The antenna system of claim 10, further comprising at least one capacitive or inductive stub mounted on the dielectric substrate. 19. The antenna system of claim 10, wherein the parasitic loop antenna is mounted on one side of a main dielectric substrate, in combination with a third antenna mounted in opposition on the other side of the main dielectric substrate. 20. An antenna system comprising: a parasitic loop antenna formed as a conductive track on a dielectric substrate having first and second opposed surfaces, the dielectric substrate having a first ground point and a second ground point adjacent to each other on the first surface of the dielectric substrate, the conductive track being formed on the dielectric substrate and having a first arm and a second arm,the first arm being formed on the dielectric substrate and following a first path starting at the first ground point, extending toward a first edge of the dielectric substrate, extending to the second surface of the dielectric substrate, extending across the second surface of the dielectric substrate along a second path, anda second arm formed on the dielectric substrate and following a third path starting at the second ground point, extending toward a second edge of the dielectric substrate, extending to the second surface of the dielectric substrate, extending across the second surface of the dielectric substrate along a fourth path, and electrically connecting to first arm; anda separate, directly driven antenna configured to excite the parasitic loop antenna. 21. The antenna system of claim 20 wherein the the second arm electrically connects to the first arm on the second surface of the dielectric substrate.
연구과제 타임라인
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