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An embedded antenna for a mobile terminal, comprising a conductor unit ( 101 ), including a PCB, and having a metal-layer-stripped region on its top; an antenna unit ( 102 ), including a PCB, being vertically connected to the metal-layer-stripped region on top of said conductor unit, and having a gr

An embedded antenna for a mobile terminal, comprising a conductor unit ( 101 ), including a PCB, and having a metal-layer-stripped region on its top; an antenna unit ( 102 ), including a PCB, being vertically connected to the metal-layer-stripped region on top of said conductor unit, and having a ground pin ( 204 ) and a feed pin ( 205 ) to be connected to circuits within said mobile terminal; a parasitic unit ( 103 ), with one end being attached to said antenna unit, and another end being apart from and in parallel to said antenna unit. The antenna has very small size, is efficiently operative on the frequency bands of GSM900 and DCS1800, and has a moderate gain and a lower SAR.

대표청구항 ▼

1. An embedded antenna for a mobile terminal, comprisinga conductor unit ( 101 ) including a PCB and having a metal-layer-stripped region ( 111 ) on its top;an antenna unit ( 102 ) including a PCB, being vertically connected to the metal-layer-stripped region on top of said conductor unit, and havin

1. An embedded antenna for a mobile terminal, comprisinga conductor unit ( 101 ) including a PCB and having a metal-layer-stripped region ( 111 ) on its top;an antenna unit ( 102 ) including a PCB, being vertically connected to the metal-layer-stripped region on top of said conductor unit, and having a ground pin ( 204 ) and a feed pin ( 205 ) to be connected to circuits within said mobile terminal;a parasitic unit ( 103 ), with one end being attached to said antenna unit and another end being apart from and in parallel to said antenna unit. 2. An embedded antenna for a mobile terminal according to claim 1, wherein said antenna unit is a grounding board of said mobile terminal. 3. An embedded antenna for a mobile terminal according to claim 1, wherein said antenna unit is a PCB with copper coated on its both surfaces. 4. An embedded antenna for a mobile terminal according to claim 3, whereinsaid antenna unit has three conductive strips printed on a first surface, respectively connected to one of said ground pin, feed pin and an end of parasitic unit;said antenna unit has on a second surface: a feeding point ( 202 ), connected to a conductive strip of the feed pin, via a metalized hole penetrating both surfaces of the antenna unit; a grounding point ( 201 ), connected to a conductive strip of the ground pin, via a metalized hole penetrating both surfaces of the antenna unit. 5. An embedded antenna for a mobile terminal according to claim 4, whereinthe second surface of said antenna unit is etched to form two parallel electromagnetic resonator with the feeding point as a join point. 6. An embedded antenna for a mobile terminal according to claim 5, whereinconductive strip lengths of said two electromagnetic resonators formed on the second surface of said antenna are respectively La and Lb, and La and Lb meet:where λ 1 , ε re1 are respectively a first working wave length and the effective dielectric capacity of the dielectric below the conductive strip of length La; λ 2 , ε re2 are respectively a second working wave length and the effective dielectric capacity of the dielectric below the conductive strip of length Lb. 7. An embedded antenna for a mobile terminal according to claim 6, wherein said first working wave length is that of GSM900 frequency band, and said second working wave length is that of DCS1800 frequency band. 8. An embedded antenna for a mobile terminal according to claim 7, whereinsaid antenna unit is substantially rectangular, having a first long edge connected to the conductor unit, a second long edge opposite to the first one, which is apart from the conductor unit, and a first and a second short edge opposite to each other;said antenna unit has a C-shaped etched region in middle of the second surface, where an opening of the C shape is directed to the second short edge, the etched region begins from the middle of the second long edge of said antenna unit, extends towards the first long edge and then towards the first short edge, extends once again towards the first long edge and then towards the second short edge, and finally protrudes towards the second long edge at its rear end. 9. An embedded antenna for a mobile terminal according to claim 8, whereina distance between the feeding point and the first short edge of the antenna unit L 7 is 3.8 mm;a distance between the grounding point and the first short edge of the antenna unit L 8 is 1.5 mm;a distance between the conductive strip connected to the parasitic unit and the second short edge of the antenna unit L 11 is 2.0 mm;a distance between the feeding point and the first long edge of the antenna unit w 1 is 2.1 mm;a distance between the grounding point and the first long edge of the antenna unit w 2 is 5.9 mm. 10. An embedded antenna for a mobile terminal according to claim 9, wherein the etched pattern on the second surface of the antenna unit is so formed such thaton the second long edge of the antenna unit, the distance between the edge of the opening of the etched region close to the first short edge of the antenna unit and the first short edge of the antenna unit L 1 is 20.0 mm;a distance between the edge of the opening of said etched region close to the second short edge of the antenna unit and the second short edge of the antenna unit L 2 is 14.0 mm;a distance between the edge of said etched region closest to the first short edge of the antenna unit and the first short edge of the antenna unit L 3 is 5.5 mm;a distance between the edge of said etched region most recessed towards the first short edge of the antenna unit and the first short edge of the antenna unit L 4 is 6.5 mm;on the second long edge of the antenna unit, a distance between the edge of the opening of the etched region close to the second short edge of the antenna unit and the second short edge of the antenna unit L 5 is 21.0 mm;a distance between the root of the protuberance at the rear end of the etched region and the first short edge of the antenna unit L 6 is 22.2 mm;the distance between the edge of said etched region closest to the second short edge of the antenna unit and the second short edge of the antenna unit L 9 is 6.5 mm;a distance between the top of the protuberance at the rear end of the etched region and the first long edge of the antenna unit w 5 is 5.0 mm;a distance between the outer edge of the etched region most apart from the first long edge of the antenna unit and the first long edge of the antenna unit w 6 is 5.0 mm;the distance between the inner edge of the etched region most apart from the first long edge of the antenna unit and the first long edge of the antenna unit w 7 is 4.7 mm;a distance between the inner edge of the etched region closest to the first long edge of the antenna unit and the first long edge of the antenna unit w 8 is 2.6 mm;a distance between the outer edge of the etched region closest to the first long edge of the antenna unit and the first long edge of the antenna unit w 9 is 2.2 mm. 11. An embedded antenna for a mobile terminal according to claim 4, wherein said parasitic unit is a metal sheet. 12. An embedded antenna for a mobile terminal according to claim 11, wherein said parasitic unit is connected with said antenna unit on the first surface of the antenna unit, and extends in parallel to and apart from the second surface of the antenna unit after two right-angle bends. 13. An embedded antenna for a mobile terminal according to claim 12, whereina distance between the end edge of the parasitic unit extending along the second surface of the antenna unit and the second short edge of the antenna unit L 10 is 14.5 mm;a distance between the edge of the parasitic unit in parallel to and apart from the antenna unit and the first surface of the antenna unit wj is 3.0 mm 14. An embedded antenna for a mobile terminal according to claim 13, whereina distance between the edge on the side of the parasitic unit towards the conductor unit and the first long edge of the antenna unit w 3 is 0 mm;a distance between the edge on the side of the parasitic unit apart from the conductor unit and the first long edge of the antenna unit w 4 is 6.0 mm. 15. A mobile terminal comprising an embedded antenna according to any one of the preceding claims, wherein the mobile terminal includes a grounding board used as the conductor unit ( 101 ).