IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0588640
(2005-02-28)
|
등록번호 |
US-7456792
(2008-11-25)
|
국제출원번호 |
PCT/EP05/002075
(2005-02-28)
|
§371/§102 date |
20060908
(20060908)
|
국제공개번호 |
WO05/083833
(2005-09-09)
|
발명자
/ 주소 |
- Baliarda,Carles Puente
- Pros,Jaume Anguera
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
18 |
초록
▼
The present invention relates to a handset and generally of any handheld device, which includes an antenna for receiving and transmitting electromagnetic wave signals. More in particular, the invention is related to handsets of the clamshell or flip-phone type. An electromagnetic bra structure is in
The present invention relates to a handset and generally of any handheld device, which includes an antenna for receiving and transmitting electromagnetic wave signals. More in particular, the invention is related to handsets of the clamshell or flip-phone type. An electromagnetic bra structure is introduced to correct the position of the lobes of the handheld radiation pattern, so that the radiation and sensitivity of the hand held device is increased in the horizontal plane or generally to the other desired directions. The electromagnetic bra structure comprises at least one conducting surface arranged over at least one side of a ground plane of the handset, so that a resonance circuit having a high impedance at an operating frequency of the antenna is establish, to block currents and electromagnetic fields from entering a region of the ground plane.
대표청구항
▼
The invention claimed is: 1. A handset for radio communication, the handset comprising: an antenna; a ground plane associated with the antenna the antenna being situated in correspondence with an antenna end of the ground plane; at least one conducting surface situated over a part of the ground pla
The invention claimed is: 1. A handset for radio communication, the handset comprising: an antenna; a ground plane associated with the antenna the antenna being situated in correspondence with an antenna end of the ground plane; at least one conducting surface situated over a part of the ground plane and separated from the part of the ground plane by a distance of 0.8-20 mm; the at least one conducting surface being arranged so that the part of the ground plane and the at least one conducting surface, in combination, establish a resonance circuit having a high impedance at an operating frequency of the antenna, towards the antenna end of the ground plane. 2. The handset according to claim 1, wherein the at least one conducting surface is short-circuited to the ground plane at a position situated at a distance from an end of the conducting surface facing the antenna end of the ground plane, the distance being such that it corresponds to an electric path length of substantially one quarter of the wavelength at the operating frequency, or an odd multiple of a quarter of the wavelength. 3. The handset according to claim 2, wherein the at least one conducting surface is short-circuited to the ground plane via at least one of: a metallic connection; a capacitive component having low impedance at RF frequencies; conductive paint; conductive paste; and conductive ink. 4. The handset according to claim 1, wherein the at least one conducting surface is not short-circuited to the ground plane, the at least one conducting surface being arranged such that the resonance circuit has a first open end facing the antenna end of the ground plane and a second open end separated from the first open end by a distance corresponding to an electrical path length substantially equal to half of the wavelength or a multiple of the half of the wavelength, at the operating frequency. 5. The handset according to claim 1, wherein the ground plane defines an outer perimeter and wherein the at least one conducting surface is short-circuited to the perimeter of the ground plane or to an inner part of the ground plane. 6. The handset according to claim 1, comprising at least one conducting surface over each side of the ground plane. 7. The handset according to claim 6, wherein at least one conducting surface over one side of the ground plane is a mirror image of another conducting surface placed over the other side of the ground plane. 8. The handset according to claim 1, wherein the at least one conducting surface is defined by a conducting plate or by a layer of conducting material comprising at least one of: conducting paint, conducting ink, and conducting paste. 9. The handset according to claim 8, wherein the handset comprises a cover made of non-conducting material and the conducting paint, paste or ink is coated on a face of the cover. 10. The handset according to claim 1, wherein at least one edge of one conducting surface and at least one edge of the ground plane are lying on a plane substantially perpendicular to the ground plane. 11. The handset according to claim 1, wherein at least one part of the at least one conducting surface is substantially parallel to the ground plane. 12. The handset according to claim 1, wherein the ground plane comprises a first conducting part and a second conducting part, the first and second conducting parts being electrically connected by at least a conducting strip, the at least a conducting strip being narrower than the width of any of the first and second conducting parts. 13. The handset according to claim 12, wherein the first and the second part of the ground plane are substantially rectangular. 14. The handset according to claim 13, wherein the at least one conducting surface has the same width as the first or the second part of the ground plane. 15. The handset according to claim 13, wherein the at least one conducting surface is narrower than the ground plane. 16. The handset according to claim 12, wherein the at least one conducting surface comprises a first end short-circuited to the ground plane and a second end which is an open circuit and is facing the conducting strip. 17. The handset according to claim 1, wherein the at least one conducting surface is substantially rectangular. 18. The handset according to claim 17, wherein the at least one conducting surface is aligned with the conducting strip. 19. The handset according to claim 1, comprising an array of two or more conducting surfaces narrower than the ground plane, the two or more conducting surfaces arranged parallel or perpendicular with respect to a ground plane longitudinal axis. 20. The handset according to claim 19, wherein the conducting surfaces have at least one of a different length and different width. 21. The handset according to claim 19, wherein the array of conducting surfaces is a periodic structure. 22. The handset according to claim 1, wherein: the at least one conducting surface is U-shaped and has two side arms; each side arm features an electrical length of substantially a quarter wavelength at the operating frequency; the side arms are short-circuited at their ends to the ground plane, and the at least one conducting surface comprises an extension facing the conducting strip. 23. The handset according to claim 1, wherein: the at least one conducting surface comprises two side arms having each arm an end in open circuit; each arm features an electrical length of substantially half of wavelength at the operating frequency; and the at least one conducting surface comprises an extension facing the conducting strip. 24. The handset according to claim 1, wherein: at least one of the conducting surfaces and the ground plane is a conducting layer of a multilayer printed circuit board; and the ground plane layer is located in between the conducting surfaces. 25. The handset according to claim 24 wherein the at least one conducting surface is short-circuited to the ground plane via a metallized via hole in the printed circuit board. 26. The handset according to claim 1, wherein the handset is a clamshell or flip-phone handset. 27. The handset according to claim 1, wherein a part of at least one of at least one conducting surface and a part of the ground plane is a multilevel structure or a space-filling curve. 28. A clamshell handset comprising: an electromagnetic bra structure at least at one half of the handset phone wherein the electromagnetic bra structure comprises two conducting plates; the plates being placed at both sides of a ground plane of the clamshell handset; both of the plates being connected at least at one point of the handset; the plates being a quarter wavelength in length or an odd multiple of a quarter wavelength; wherein the clamshell handset has formed therein an opening nearby a hinge of the clamshell phone. 29. A method of producing a handset comprising: arranging at least one conducting surface over a part of a ground plane and separated from the part of the ground plane by 0.8-20 mm; and wherein the part of the ground plane and the at least one conducting surface, in combination, establish a resonance circuit having a high impedance at an operating frequency of the antenna, towards an antenna end of the ground plane.
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