CN201072804Y - antenna structure - Google Patents

Abstract

The utility model discloses an antenna structure, including connecting portion, feed-in portion, inductance part, capacitance part and irradiator. The feed-in part is connected with the connecting part and is provided with a feed-in point. The inductor part is formed by extending outwards from the connecting part, and the free end of the inductor part is grounded. The capacitor part extends outwards from the connecting part to form a strip shape and is adjacent to and parallel to the ground plane. The radiator is connected with the connecting part. The utility model discloses an antenna structure's inductance portion, electric capacity portion simulation inductance and electric capacity component make this antenna structure reach adjustment resonant frequency and impedance match's effect to the degree of difficulty of design and preparation has been reduced and the cost has been saved.

Description

antenna structure

Technical field

The utility model relates to an antenna structure, in particular to a multi-frequency antenna structure used in mobile communication products.

Background technique

Antennas are widely used in mobile communication products. In order to meet the performance requirements of mobile communication products for antennas, capacitive and inductive components are often used to adjust resonance frequency and impedance matching when designing antennas.

Please refer to Fig. 1, which is a structural schematic diagram of an existing antenna structure 1'. The antenna structure 1' has a bent antenna body 10', and a feed point 11' is arranged on the antenna body 10', and the feed point 11' divides the antenna body 10' into a bent first The radiation part 12' and the second radiation part 13'. A protrusion 121' extends from the end of the first radiating portion 12' corresponding to the second radiating portion 13'. An LC parallel circuit composed of a first capacitive element 20' and an inductive element 30' is connected between the feeding point 11' of the antenna structure 1' and the ground, and the LC parallel circuit is used to connect the antenna body 10' to the high frequency The circuit achieves impedance matching. A second capacitive element 40' is connected in series between the end of the second radiating portion 13' and the protruding portion 121' of the first radiating portion 12', and the second capacitive element 40' is used to adjust the second radiating portion 13' electrical length.

When making the antenna structure 1' of the handheld device, the first capacitive element 20', the inductive element 30' and the second capacitive element 40' of the antenna structure 1' can be directly arranged on the printed circuit board of the handheld device . However, for notebook computers, since the antenna structure 1' is generally arranged on the top of the display screen of the notebook computer, the first capacitive element 20', the inductive element 30' and the second capacitive element 40' cannot be directly arranged on the printed circuit board. Above, it needs to be arranged on the antenna structure 1 ′, which makes the design and manufacturing process of the antenna structure 1 ′ more complicated. Moreover, the antenna structure 1' uses the first and second capacitive elements 20', 40' and the inductive element 30', so that even if the antenna structure 1' can be directly arranged on the printed circuit board, its cost is relatively high.

Utility model content

One of the purposes of the present utility model is to provide an antenna structure capable of simulating capacitance and inductance elements so as to reduce the difficulty of design and manufacture and save costs for the defects of the above-mentioned prior art.

To achieve the above purpose, the antenna structure of the present invention includes a connection part, a feed-in part, an inductance part, a capacitor part and a radiator. The feeding part is connected with the connecting part, and a feeding point is arranged on the feeding part. The inductance part is formed by extending outward from the connection part, and the free end of the inductance part is grounded. The capacitor portion extends outward from the connection portion in a strip shape and is adjacent to and parallel to the ground plane. The radiator is connected with the connection part.

The second purpose of the present utility model is to provide an antenna structure capable of simulating capacitance to reduce the difficulty of design and manufacture and save costs for the defects of the above-mentioned prior art.

In order to achieve the second above-mentioned purpose, the antenna structure of the present utility model includes a connection part, a feed-in part, a capacitor part and a radiator; the feed-in part is connected to the connection part, and a feed-in point is arranged on the feed-in part; The connection part extends outward in a strip shape and is adjacent to and parallel to the ground plane; the radiator is connected to the connection part.

As mentioned above, the antenna structure of the utility model simulates the inductance element and the capacitance element through the inductance part and the capacitance part or simulates the capacitance element through the capacitance part, so that the antenna structure can achieve the effect of adjusting the resonance frequency and impedance matching without using the capacitance or inductance element , thereby reducing the difficulty of designing and manufacturing the antenna structure and saving costs.

Description of drawings

In the accompanying drawings of the manual:

FIG. 1 is a schematic structural diagram of an existing antenna structure.

Fig. 2 is a structural schematic diagram of the antenna structure of the present invention.

The reference numerals of each element in the figure are explained as follows:

Antenna structure 1, 1’ connection part 10

Feed-in part 20 Feed-in point 21, 11’

Inductance part 30 Inductance bar 31

Inductance longitudinal strip 32 grounding point 40

The first radiating part 50, 12’ the first radiating bar 51

Radiating longitudinal bar 52 Radiating end 53

First Capacitor Part 54 Capacitor Part 60

The second radiating part 70, 13' the second radiating bar 71

Extension 72 Groove 73

Second capacitor part 74 Protruding part 121'

First capacitive element 20' Inductive element 30'

Second capacitive element 40'

Detailed ways

In order to illustrate the technical content, structural features, purpose and effect of the present utility model in detail, the following will describe in detail in conjunction with the embodiments and accompanying drawings.

Please refer to FIG. 2 , the antenna structure 1 of the present invention can be formed by stamping a rectangular metal plate extending laterally or etching copper foil on a flexible circuit board. The antenna structure 1 has a rectangular plate-shaped connecting portion 10 . A strip-shaped feed-in portion 20 with a width smaller than that of the connection portion 10 extends downward from approximately the middle of the lower edge of the connection portion 10 , and a feed-in point 21 is disposed on the feed-in portion 20 . The left side of the connecting part 10 extends to the left along the lower part of the middle part, and there is an "L"-shaped inductance part 30. The inductor horizontal bar 31 and the inductor vertical bar 32 vertically extending downward from the end of the inductor horizontal bar 31 perpendicular to the inductor horizontal bar 31 . The lower end of the inductor vertical strip 32 is connected to a ground point 40 .

A first radiation portion 50 extends along the right side of the connecting portion 10 . The first radiating portion 50 has a long strip-shaped first radiating horizontal bar 51 vertically extending outward from the right side of the connecting portion 10 along the lower part of the middle. The end of the first radiating horizontal bar 51 is perpendicular to the first radiating horizontal bar and extends upward to form a radiating vertical bar 52 . A rectangular radiating end portion 53 parallel to the first radiating horizontal bar 51 extends rightward and upward from the top of the radiating vertical bar 52 . A strip-shaped first capacitive portion 54 parallel to the first radiating horizontal bar 51 extends leftward from the left top of the radiating vertical bar 52 , and the width of the first capacitive portion 54 is smaller than the width of the radiating end portion 53 . The electrical length of the first radiating portion 50 is a quarter wavelength of an electromagnetic wave with a frequency of 900 MHz.

The lower end of the right side of the connecting portion 10 and the right end of the lower edge extend downward and rightward with a strip-shaped capacitor portion 60 parallel to the first radiating horizontal bar 51 of the first radiating portion 50 , and the capacitor Section 60 is parallel to a ground plane (not shown).

A second radiating portion 70 vertically extends rightward from the top of the connecting portion 10 . The second radiating part 70 has a second radiating horizontal bar 71 extending outward from the top of the connecting part 10. The lower side of the second radiating horizontal bar 71 extends downward along the right end to form an extending part 72, so that the connecting part 72 and the connecting part Grooves 73 are formed between the portions 10 . The right edge of the second radiating horizontal bar 71 is adjacent to the left edge of the first capacitor portion 54 , and the right side of the second radiating horizontal bar 71 extends rightward along the upper end with a strip-shaped second capacitor portion 74 . The second capacitor part 74 is located above the first capacitor part 54 of the first radiation part 50 , and the lower edge of the second capacitor part 74 is adjacent to the upper edge of the first capacitor part 54 . The electrical length of the second radiating portion 70 is a quarter wavelength of an electromagnetic wave with a frequency of 1800 MHz.

When the antenna structure 1 of the present invention is used for communication, the ground point 40 of the antenna structure 1 is directly connected to the ground plane, and the inductance part 30 is connected to the ground plane through the ground point 40. Since the inductance part 30 is a long strip Therefore, the inductance part 30 is in the shape of a line, so the inductance part 30 is connected to the ground plane to achieve the effect of simulating a parallel inductance element. The capacitance part 60 is close to the ground plane, and the capacitance part 60 is elongated, so the capacitance part 60 and the ground plane are in the shape of two metal sheets of capacitance, so it can produce a capacitive effect with the ground plane, so the capacitance of the antenna structure 1 Section 60 can achieve the effect of simulating a parallel capacitive element. Therefore, the inductance part 30 and the capacitance part 60 can achieve impedance matching between the antenna structure 1 and the high frequency circuit.

When the first radiating part 50 sends and receives electromagnetic waves, a main resonance mode is excited, so that the first radiating part 50 sends and receives electromagnetic waves in the GSM850-960 frequency band. The second capacitive part 74 of the second radiating part 70 is located above the first capacitive part 54 of the first radiating part 50, and the lower edge of the second capacitive part 74 is adjacent to the upper edge of the first capacitive part 54, so that The effect of the series capacitance element can be simulated, so that when the second radiation part 70 receives and receives high-frequency electromagnetic waves, a capacitive effect occurs between the first capacitor part 54 and the second capacitor part 74, so as to increase the electrical length of the second radiation part 70, so that The second radiation unit 70 transmits and receives electromagnetic waves in the DCS1800-WCDMA2100 frequency band.

In summary, the antenna structure 1 of the present utility model simulates a parallel inductive element through the inductance part 30, simulates a parallel capacitor element through the capacitor part 60, and simulates a series capacitor element through the first capacitor part 54 and the second capacitor part 74, so that the antenna structure 1 The effect of adjusting the resonant frequency and impedance matching can be achieved without using capacitance and inductance elements, thereby reducing the difficulty of designing and manufacturing the antenna structure 1 and saving costs.

The utility model can be used as a variety of changes, such as only simulating inductance through the inductance part or only simulating capacitance through the capacitor part. Therefore, the protection scope of the utility model is not limited to the above-mentioned embodiments. Equivalent modifications or changes made by the spirit of the new model should be included in the scope of protection of rights.

Claims (16)

1. antenna structure, it is characterized in that: described antenna structure comprises connecting portion, feeding portion, inductance department, capacitance part and radiant body; Described feeding portion is connected with connecting portion, and this feeding portion is provided with a load point; Described inductance department stretches out from connecting portion and forms, the free ending grounding of this inductance department; Described capacitance part stretches out from connecting portion and is strip and vicinity and parallel ground plane; Described radiant body is connected with connecting portion.

2. antenna structure according to claim 1 is characterized in that: described inductance department is L-shaped.

3. antenna structure according to claim 2, it is characterized in that: described inductance department has the inductance taeniae of locating the elongated inductance horizontal stripe that outwards vertically extends from the left side of connecting portion along the middle part on the lower side and being extended downward vertically perpendicular to this inductance horizontal stripe by the end of inductance horizontal stripe, the lower end ground connection of this inductance taeniae.

4. antenna structure according to claim 1 is characterized in that: described feeding portion extends out downwards from the approximate mid-section position on connecting portion downside edge.

5. antenna structure according to claim 1, it is characterized in that: described radiant body has first Department of Radiation and second Department of Radiation, this first Department of Radiation has from the connecting portion right side along the outside vertically extending first elongated radiation horizontal stripe, this first radiation horizontal stripe end is formed with a radiation taeniae perpendicular to this first radiation horizontal stripe vertical extent that makes progress, the top of this radiation taeniae to the right and extend upward a rectangular radiation end that is parallel to the first radiation horizontal stripe, the top left hand of radiation taeniae is extended first capacitance part of the strip of the parallel first radiation horizontal stripe left; This second Department of Radiation has the second radiation horizontal stripe that stretches out and form from connecting portion, the free-ended end of the second radiation horizontal stripe is along adjoining with the free-ended end of first capacitance part edge, the free-ended end of this second radiation horizontal stripe is along extending outward second an elongated capacitance part, and second capacitance part is positioned at a side of first capacitance part and adjoins with first capacitance part.

6. antenna structure according to claim 5 is characterized in that: the width of described first capacitance part is less than the width of radiation end.

7. antenna structure according to claim 5, it is characterized in that: the second radiation horizontal stripe of described second Department of Radiation extends out to the right from the connecting portion top, this second radiation horizontal stripe downside extends to form extension downwards along right-hand member, is formed with a groove between extension and connecting portion.

8. antenna structure according to claim 7 is characterized in that: described second capacitance part extends out to the right along the upper end from the right side of the second radiation horizontal stripe.

9. antenna structure according to claim 1 is characterized in that: described capacitance part also extends out to the right along the right-hand member on lower end and downside edge is downward from the right side of connecting portion.

10. antenna structure, it is characterized in that: described antenna structure comprises connecting portion, feeding portion, capacitance part and radiant body; Described feeding portion is connected with connecting portion, and this feeding portion is provided with a load point; Described capacitance part stretches out from connecting portion and is strip and vicinity and parallel ground plane; Described radiant body is connected with connecting portion.

11. antenna structure according to claim 10 is characterized in that: described feeding portion extends out downwards from the approximate mid-section position on connecting portion downside edge.

12. antenna structure according to claim 10, it is characterized in that: described radiant body has first Department of Radiation and second Department of Radiation, this first Department of Radiation has from the connecting portion right side along the outside vertically extending first elongated radiation horizontal stripe, this first radiation horizontal stripe end is formed with a radiation taeniae perpendicular to this first radiation horizontal stripe vertical extent that makes progress, the top of this radiation taeniae to the right and extend upward a rectangular radiation end that is parallel to the first radiation horizontal stripe, the top left hand of radiation taeniae is extended first capacitance part of the strip of the parallel first radiation horizontal stripe left; This second Department of Radiation has the second radiation horizontal stripe that stretches out and form from connecting portion, the free-ended end of the second radiation horizontal stripe is along adjoining with the free-ended end of first capacitance part edge, the free-ended end of this second radiation horizontal stripe is along extending outward second an elongated capacitance part, and second capacitance part is positioned at a side of first capacitance part and adjoins with first capacitance part.

13. antenna structure according to claim 12 is characterized in that: the width of described first capacitance part is less than the width of radiation end.

14. antenna structure according to claim 12, it is characterized in that: the second radiation horizontal stripe of described second Department of Radiation extends out to the right from the connecting portion top, this second radiation horizontal stripe downside has extended to form extension downwards along right-hand member, is formed with a groove between extension and connecting portion.

15. antenna structure according to claim 14 is characterized in that: described second capacitance part extends out to the right along the upper end from the right side of the second radiation horizontal stripe.

16. antenna structure according to claim 10 is characterized in that: described capacitance part also extends out to the right along the right-hand member on lower end and downside edge is downward from the right side of connecting portion.

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