CN102386481B - Capacitive antenna structure - Google Patents

Abstract

A capacitive antenna structure includes: a substrate and a sheet-shaped capacitor. The substrate has a radiating metal layer and a grounding metal layer. The radiating metal layer has a first hollow portion that exposes the substrate, the first hollow portion has a signal feed hole, and a second hollow portion on the edge. The grounding metal layer has a third hollow portion on the edge that exposes the substrate and corresponds to the second hollow portion, and the third hollow portion has a first contact and a second contact on both sides to electrically connect the capacitor. The third hollow portion is connected to a fourth hollow portion that exposes the substrate, and the fourth hollow portion has a signal transmission line, and the signal transmission line includes the signal feed hole to connect the cable. The capacitor is used to couple and excite the energy of the antenna, so that the antenna has good receiving and transmitting effects.

Description

capacitive antenna structure

technical field

The present invention relates to an antenna, in particular to an antenna structure with chip capacitors.

Background technique

At present, many portable electronic devices adopt exposed antenna structures in order to have a good receiving effect. The exposed antenna structures not only fail to meet the design of tiny form-factor devices, but also fail to meet the needs of hidden antenna designs.

In order to make the antenna closer to the miniaturized design, the industry mainly makes a planar antenna pattern on a substrate, and uses the ratio of the long and short axes of the pattern of the planar antenna, as well as the non-uniform line width to achieve reception and transmission. Due to the operational characteristics of the signal, the antenna has an approximately omnidirectional radiation pattern. However, the ratio of the long and short axes of the pattern of the planar antenna on the antenna and the non-uniform line width are not easy to adjust in design, and the pattern of the antenna will be more complicated and difficult to lay out, so there are problems in the design of the tiny shaped antenna. Many troubles.

Contents of the invention

The main purpose of the present invention is to improve the existing problems of the traditional antenna. The present invention adds a sheet-shaped capacitor to the antenna, so that the energy of the antenna is coupled and excited, so that the receiving and transmitting effects of the antenna are better, and the antenna The structure is simpler and easier to manufacture.

In order to achieve the above object, the present invention provides a capacitive antenna structure, comprising:

A substrate having a front surface and a back surface, the front surface has a radiation metal layer, the radiation metal layer has a first hollow part exposing the front surface of the substrate, and the first hollow part has a signal feed-in hole, The first hollow part maintains a distance between the signal feed-in hole and the radiating metal layer to form an electrically non-electrically connected state. There is a second hollow part on the edge of the radiating metal layer; in addition, there is a second hollow part on the back surface The ground metal layer has a third hollow portion on the edge of the ground metal layer that exposes the back of the substrate, and the third hollow portion corresponds to the second hollow portion on the front side of the substrate; there are first contacts and second hollow portions on both sides of the third hollow portion Two contacts, the third hollow part is connected with a fourth hollow part exposing the substrate, the fourth hollow part has a signal transmission line, and the signal transmission line includes the signal feed-in hole;

A capacitor is electrically connected to the first contact and the second contact, and corresponds to the second hollow portion on the front surface of the substrate.

The effect of the present invention is that the present invention adds a sheet-shaped capacitor to the antenna, so that the energy of the antenna is coupled and excited, so that the receiving and transmitting effects of the antenna are better, and the structure of the antenna is simpler and easier to manufacture.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of the front appearance of the antenna of the present invention;

Figure 2 is a partial enlarged schematic view of Figure 1;

Fig. 3 is a three-dimensional schematic diagram of the appearance of the back of the antenna of the present invention;

FIG. 4 is a partial enlarged schematic diagram of FIG. 3;

FIG. 5 is a schematic diagram of the electrically connected chip capacitor in FIG. 4;

FIG. 6 is a schematic diagram of another embodiment of the antenna of the present invention;

FIG. 7 is a partially enlarged schematic diagram of FIG. 6 .

Among them, reference signs

Antenna 10

Substrate 1

Front 11

Radiation metal layer 12

The first hollow part 13

Signal feed-in hole 14

The second hollow part 15

back 16

Ground metal layer 17

first contact 171

second contact 172

Signal transmission line 173

The third hollow part 18

Fourth hollow part 19

Capacitor 2

Wire 3

core core 31

Antenna Connector 4

Detailed ways

The technical content and detailed description of the present invention are now described as follows in conjunction with the drawings:

Please refer to FIG. 1 and FIG. 2 , which are the three-dimensional front appearance of the antenna of the present invention and the partially enlarged schematic diagram of FIG. 1 . As shown in the figure: the capacitive antenna structure of the present invention has a substrate 1 on the antenna 10, and the substrate 1 is any one of glass fiber or ceramics. The substrate 1 has a front surface 11, the front surface 11 has a radiating metal layer 12, and the radiating metal layer 12 has a circular first hollow part 13 that exposes the front surface 11 of the substrate 1. The first hollow part 13 There is a signal feed-in hole 14 in the middle, and the first hollow part 13 keeps a distance between the signal feed-in hole 14 and the radiation metal layer 12 to form a non-electrically connected state, and the signal feed-in hole 14 can be connected to the general Wire (not shown in the figure). In addition, there is a square or rectangular second hollow portion 15 on the edge of the radiation metal layer 12 .

Please refer to FIG. 3 , FIG. 4 , and FIG. 5 , which are the three-dimensional appearance of the rear surface of the antenna of the present invention, the partial enlargement of FIG. 3 , and the schematic diagram of the electrically connected chip capacitor in FIG. 4 . As shown in the figure: the substrate 1 has a back surface 16 with a ground metal layer 17 on the back surface 16, and a third hollow portion 18 on the edge of the ground metal layer 17 that exposes the back surface 12 of the substrate 1. The third hollow The portion 18 corresponds to the second hollow portion 15 on the front surface 11 of the substrate 1 . The third hollow part 18 has a first contact 171 and a second contact 172 on both sides. The third hollow part 18 is connected with an S-shaped fourth hollow part 19. There is an L-shaped signal in the fourth hollow part 19. The transmission line 173, the signal transmission line 173 includes the signal feed-in hole 14, and the signal feed-in hole 14 can be electrically connected with the signal transmission line 173 when a common wire (not shown in the figure) is inserted.

The capacitor 2 is in the shape of a sheet that can be surface-adhered on the first contact 171 and the second contact 172 , and corresponds to the second hollow portion 15 on the front surface of the substrate 1 . When a current flows in, the current will flow through the first contact 171 and the capacitor 2 to the second contact 172, so that the energy of the antenna structure is coupled and excited, and the current flowing through the capacitor 2 is excited, so that The effect of the antenna structure on receiving or transmitting signals is better. At the same time, the second hollow portion 15 on the front surface 11 of the substrate 1 corresponding to the capacitor 2 mainly prevents the capacitor 2 from being covered (short-circuited) to form a high-frequency short-circuit phenomenon of the antenna. The area of the second hollow portion 15 is larger than the volume of the capacitor 2 .

Please refer to FIG. 6 and FIG. 7 , which are another embodiment of the antenna of the present invention and a partially enlarged schematic diagram of FIG. 6 . As shown in the figure: when the antenna of the present invention is used, the core core 31 inside a wire 3 passes through the signal feed-in hole 14 of the substrate 1, and after the core core 31 passes through the signal feed-in hole 14, it is connected to the substrate The signal transmission line 173 on the back 12 is electrically connected. The other end of the wire 3 is electrically connected to an antenna connector 4, and the antenna connector 4 is provided for a user to electrically connect a coaxial cable (not shown in the figure).

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should all belong to the protection scope of the appended claims of the present invention.

Claims (10)

1. a capacitive antenna structure, is characterized in that, comprising:

One substrate, it has a positive and back side, on this front, there is a radiation metal layer, in this radiation metal layer, there is first hollow-out parts that substrate front side is exposed, in this first hollow-out parts, there is a signal feed-in hole, this first hollow-out parts makes this signal feed-in hole and this radiation metal layer keep a spacing, so that this signal feed-in hole and this radiation metal layer form state of insulation, has one second hollow-out parts on the edge of this radiation metal layer; Separately, have a ground metal layer on this back side, have the 3rd hollow-out parts that substrate back is exposed on this ground metal layer edge, the 3rd hollow-out parts is to the second hollow-out parts that should substrate front side; The 3rd hollow-out parts both sides have the first contact and the second contact, and the 3rd hollow-out parts is connected with the 4th hollow-out parts that substrate is exposed, and in the 4th hollow-out parts, has a signal transmssion line, and this signal transmssion line includes this signal feed-in hole;

One capacitor, electrically connect is on this first contact and the second contact, and to the second hollow-out parts that should substrate front side.

2. capacitive antenna structure according to claim 1, is characterized in that, this substrate is any one of glass fibre or pottery.

3. capacitive antenna structure according to claim 1, is characterized in that, this first hollow-out parts is circular.

4. capacitive antenna structure according to claim 1, is characterized in that, this second hollow-out parts be square or rectangular any one.

5. capacitive antenna structure according to claim 1, is characterized in that, the 4th hollow-out parts is S-shaped.

6. capacitive antenna structure according to claim 5, is characterized in that, this signal transmssion line is L shaped.

7. capacitive antenna structure according to claim 1, is characterized in that, this capacitor is sheet.

8. capacitive antenna structure according to claim 1, is characterized in that, the area of this second hollow-out parts is greater than the volume of this capacitor.

9. capacitive antenna structure according to claim 1, is characterized in that, also includes a wire, has a core stamen in this wire, and one end of this core stamen is inserted in this signal feed-in hole, with the signal transmssion line electrically connect of substrate back.

10. capacitive antenna structure according to claim 9, is characterized in that, the core stamen of this wire one end is inserted in signal feed-in hole and signal transmssion line electrically connect, and the other end electrically connect of this wire has an antenna terminal.

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