CN101728639B - Multi-frequency antenna and electronic device with multi-frequency antenna - Google Patents

Abstract

The invention relates to a multi-frequency antenna and an electronic device with the same. Specifically, the invention relates to a multi-frequency antenna which is used for an electronic device to transmit wireless signals. The multi-frequency antenna comprises a substrate, a radiation component, a grounding component, a short circuit component and a feed-in point. The radiation component, the grounding component and the short circuit component are arranged on the substrate. The short circuit component comprises a first end and a second end, the first end is connected with the radiation component, the second end is connected with the grounding component, and a first slot hole is formed between the radiation component and the short circuit component. The feed-in point is used for feeding in an electrical signal, wherein the feed-in point is substantially positioned between the side edge of the substrate and the short-circuit component. The invention can achieve the effect of broadband transmission.

Description

Multi-frequency antenna and electronic device with multi-frequency antenna

technical field

The invention relates to a multi-frequency antenna, in particular to a multi-frequency antenna which can utilize the adjustment slot to achieve broadband transmission.

Background technique

With the advancement of science and technology, the transmission of electronic products on the market using wireless communication systems has become more and more popular. For multimedia data that requires a large amount of data, a transmission antenna with a larger bandwidth is more needed. As a result, traditional antennas cannot meet the requirements.

One type of antenna has been disclosed in the prior art. Please refer to FIG. 1A for a schematic diagram of an antenna in the prior art. A prior art antenna 90 is disclosed in US Patent Publication No. 6,812,892B2. The prior art antenna 90 has a radiation element 91 , a connection element 92 , a ground element 93 and a feed point F. As shown in FIG. The connection element 92 has a first end 921 and a second end 922 ; and the first end 921 of the connection element 92 is connected to the radiation element 91 , and the second end 922 is connected to the ground element 93 . And the antenna 90 directly feeds the signal through the feeding point F to transmit an electrical signal.

Next, please refer to FIG. 1B , which is the VSWR of the antenna 90 at different frequencies according to FIG. 1A . It can be known from FIG. 1B that the antenna 90 can only transmit in the range of frequencies around 2.5 GHz and 5.5 GHz. Taking the frequency around 2.5GHz as an example, the bandwidth of the antenna 90 in this frequency band is about 250MHz, and the center frequency is about 2450MHz, so the percentage is about (250MHz/2450MHz)=10.2%. It can be seen that the frequency band that the antenna 90 in the prior art can transmit is very limited, which does not meet the bandwidth requirement of the current multi-frequency antenna.

Therefore, it is necessary to invent a multi-frequency antenna to solve the deficiencies in the prior art.

Contents of the invention

The main purpose of the present invention is to provide a multi-frequency antenna, which can utilize the adjustment slot to achieve broadband transmission effect.

Another main objective of the present invention is to provide an electronic device having a multi-band antenna.

To achieve the above objectives, the electronic device of the present invention includes a wireless signal module and a multi-frequency antenna. The multi-frequency antenna is electrically connected with the wireless signal module. The multi-frequency antenna includes a substrate, a radiation component, a ground component, a short circuit component and a feed point. The radiation component is disposed on the substrate. The grounding component is arranged on the substrate and is used for grounding the multi-frequency antenna. The short circuit component is arranged on the substrate. The short-circuit component includes a first end and a second end, the first end is connected to the radiation component, and the second end is connected to the ground component, wherein there is a first slot between the radiation component and the short-circuit component. The feed-in point is used for feeding in electrical signals, wherein the feed-in point is substantially located between the side of the substrate and the short-circuit component.

The multi-frequency antenna and its electronic device of the present invention can achieve the effect of broadband transmission.

Description of drawings

FIG. 1A is a schematic diagram of an antenna in the prior art.

Figure 1B shows its VSWR at different frequencies based on Figure 1A.

FIG. 2A is a schematic diagram of the first embodiment of the multi-frequency antenna of the present invention.

Figure 2B shows its VSWR at different frequencies based on Figure 2A.

Figure 2C shows its performance at different frequencies based on Figure 2A.

FIG. 2D shows its radiation field diagram in the horizontal direction according to FIG. 2A .

FIG. 3A is a schematic diagram of a second embodiment of the multi-frequency antenna of the present invention.

Figure 3B shows its VSWR values at different frequencies based on Figure 3A.

FIG. 4A is a schematic diagram of a third embodiment of the multi-frequency antenna of the present invention.

Figure 4B shows its VSWR values at different frequencies based on Figure 4A.

FIG. 5A is a schematic diagram of a fourth embodiment of the multi-frequency antenna of the present invention.

Figure 5B shows its VSWR values at different frequencies according to Figure 5A.

FIG. 6A is a schematic diagram of a fifth embodiment of the multi-frequency antenna of the present invention.

Figure 6B shows its VSWR values at different frequencies based on Figure 6A.

FIG. 7A is a schematic diagram of a sixth embodiment of the multi-frequency antenna of the present invention.

Fig. 7B shows its VSWR values at different frequencies according to Fig. 7A.

FIG. 8A is a schematic diagram of a seventh embodiment of the multi-frequency antenna of the present invention.

Figure 8B shows its VSWR values at different frequencies based on Figure 8A.

FIG. 9 is a system block diagram of the electronic device of the present invention.

Description of main component symbols:

Existing technology: Matching component 32

Antenna 90 The first matching area 321

Radiation component 91 Second matching area 322

Connecting component 92 Grounding component 40

First end 921 Short circuit component 50

The second end 922 The first end 51

Grounding component 93 Second terminal 52

Feed point F Electronic device 60

Wireless signal module 61

The present invention: Feed point F

Multi-frequency antenna 10a, 10b, 10c, 10d, 10e, 10f, 10g The first slot S1

Substrate 20 Second slot S2, S2’

Radiation components 30, 30a, 30b Third slots S3, S3'

Second radiation area 312

Detailed ways

In order to make the above and other objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention are listed below and described in detail in conjunction with the accompanying drawings.

Please refer to FIG. 2A , which is a schematic diagram of a first embodiment of the multi-frequency antenna of the present invention.

In the first embodiment of the present invention, the multi-frequency antenna 10a is a planar structure. The multi-frequency antenna 10 a includes a substrate 20 , a radiating element (Radiating Element) 30 , a grounding element (Grounding Element) 40 , a shorting element 50 and a feeding point (feeding point) F. The substrate 20 is a printed circuit board, a plastic board or a glass fiber board, but the invention is not limited thereto. The radiation component 30 , the ground component 40 and the short circuit component 50 can be printed on the substrate 20 , or made of metal parts (iron parts) and then attached to the substrate 20 . The radiating element 30 can pass electric current to excite radiant energy. The radiation component 30 includes a first radiation area 311 , a second radiation area 312 and a matching component 32 . The matching component 32 includes a first matching area 321 and a second matching area 322 . The grounding component 40 is used for grounding the multi-band antenna 10a. The short circuit element 50 includes a first end 51 and a second end 52 , the first end 51 is connected to the radiation element 30 , and the second end 52 is connected to the ground element 40 .

There is a first slot S1 between the radiation component 30 and the short circuit component 50, a second slot S2 between the first radiation area 311 and the second radiation area 312, and a gap between the first matching area 321 and the second matching area 322. It has a third slot S3. Moreover, the above-mentioned second slot S2 and third slot S3 are substantially parallel to the first radiation area 311 . The radiation component 30 uses the lengths of the first slot S1 , the second slot S2 and the third slot S3 to adjust the impedance matching to resonate different frequency bands. In order to achieve a better resonance effect, the length L2 of the first slot S1 and the second radiation area 312 should be greater than half of the length L1 of the first radiation area 311, and the length of the third slot S3 should be greater than that of the first matching area 321. half of the length L3. And the height of the second radiation area 312 should be greater than the height of the first slot S1 , and the height of the second matching area 322 should be greater than the height of the third slot S3 .

A feed point F is also included on the multi-frequency antenna 10a. The feeding point F is substantially located between the side of the substrate 20 and the short circuit component 50 . In the first embodiment of the present invention, the feeding point F is located on the radiating element 30 , and is substantially at the center between the edge of the matching element 32 on the radiating element 30 and the first end 51 of the shorting element 50 . The feeding point F is electrically connected to a feeding line (not shown in the figure) for feeding an electrical signal. The feeding line can be a cable such as a radio frequency cable (RFCable), but the present invention is not limited thereto.

With the structure of the above-mentioned multi-frequency antenna 10a and the functions of each slot, the first radiation area 311 can resonate a frequency band of about 2 GHz, the second radiation area 312 can resonate a frequency band of about 3 GHz, and the second matching area 322 Then the frequency band around 5GHz can be resonated.

Then please refer to FIG. 2B to FIG. 2D at the same time. Wherein Fig. 2B shows its VSWR at different frequencies according to Fig. 2A, Fig. 2C shows the effectiveness of the first embodiment of the broadband antenna of the present invention at different frequencies according to Fig. 2A, and Fig. 2D shows its VSWR in the horizontal direction according to Fig. 2A Radiation field diagram.

As can be seen from FIG. 2B , the multi-frequency antenna 10 a can transmit frequency bands around 2.3 GHz to 2.7 GHz, 3.3 GHz to 3.8 GHz, and 5.15 GHz to 5.85 GHz through the above structure and the function of each slot. And it can be clearly seen from FIG. 2C that the efficiencies at frequencies around 2.3 GHz to 2.7 GHz, 3.3 GHz to 3.8 GHz and 5.15 GHz to 5.85 GHz are all over 40%, making the multi-frequency antenna 10 a have good transmission performance. Finally, it can be known from FIG. 2D that the multi-frequency antenna 10a is an omnidirectional antenna. Therefore, compared with the antenna 90 in the prior art, the multi-frequency antenna 10a of the present invention has a better transmission effect.

The present invention is not limited to the structure of the multi-frequency antenna 10a in the first embodiment. Next, please refer to FIGS. 3A-3B for related schematic diagrams of a second embodiment of the multi-frequency antenna of the present invention. 3A is a schematic diagram of the second embodiment of the multi-frequency antenna of the present invention, and FIG. 3B shows its VSWR values at different frequencies according to FIG. 3A.

In the second embodiment of the present invention, the radiation element 30a of the multi-frequency antenna 10b is a complete metal plate. The radiation element 30a does not have the second slot S2 and the third slot S3 shown in FIG. 2A . Under this configuration, the VSWR exhibited by the multi-frequency antenna 10 b is as shown in FIG. 3B . The multi-frequency antenna 10b may have an operating frequency band of 2.8GHz to 6GHz. Compared with the antenna 90 in the prior art, the multi-frequency antenna 10b obviously has a wider operating frequency band.

Next, please refer to FIGS. 4A-4B , which are related schematic diagrams of a third embodiment of the multi-frequency antenna of the present invention. 4A is a schematic diagram of a third embodiment of the multi-frequency antenna of the present invention, and FIG. 4B shows its VSWR values at different frequencies according to FIG. 4A.

In the third embodiment of the present invention, the radiating element 30b of the multi-frequency antenna 10c only includes the first radiating area 311 and the second radiating area 312 , without extending the matching element 32 shown in FIG. 2A . Under this configuration, the VSWR exhibited by the multi-frequency antenna 10c is as shown in FIG. 4B . The multi-frequency antenna 10c can also resonate operating frequency bands around 2.7GHz, 3.5GHz to 3.8GHz, and 5GHz.

Next, please refer to FIGS. 5A-5B for related schematic diagrams of a fourth embodiment of the multi-frequency antenna of the present invention. FIG. 5A is a schematic diagram of a fourth embodiment of the multi-frequency antenna of the present invention, and FIG. 5B shows its VSWR values at different frequencies according to FIG. 5A .

In the fourth embodiment of the present invention, the feeding point F of the multi-frequency antenna 10 d and the radiation element 30 are disposed on different planes of the substrate 20 . The position of the feeding point F is also substantially located between the side of the substrate 20 and the position mapped by the short circuit component 50 . And the ground component 40 also extends to another plane of the substrate 20 . Under this configuration, the VSWR exhibited by the multi-frequency antenna 10d is as shown in FIG. 5B . The multi-frequency antenna 10d can resonate to operate frequency bands around 2.8 GHz and above 3.8 GHz.

On the other hand, the shapes and positions of the slots of the present invention are not limited to the above-mentioned embodiments. Next, please refer to FIGS. 6A-6B for related schematic diagrams of a fifth embodiment of the multi-frequency antenna of the present invention. FIG. 6A is a schematic diagram of a fifth embodiment of the multi-frequency antenna of the present invention, and FIG. 6B shows its VSWR values at different frequencies according to FIG. 6A .

In the fifth embodiment of the present invention, the shape of the second slot S2' of the multi-frequency antenna 10e is different from that of the second slot S2 in the above-mentioned embodiment. The shape of the second slot S2' is similar to an L shape, and its opening is substantially perpendicular to the first radiation area 311. In this way, the first radiation area 311 can resonate a frequency band of about 3 GHz, and the second radiation area 312 can resonate a frequency band of about 2 GHz. Under this configuration, the VSWR exhibited by the multi-frequency antenna 10e is as shown in FIG. 6B. The multi-frequency antenna 10e can also resonate into operable frequency bands around 2GHz, 3GHz and 5GHz.

Next, please refer to FIGS. 7A-7B for related schematic diagrams of a sixth embodiment of the multi-frequency antenna of the present invention. FIG. 7A is a schematic diagram of a sixth embodiment of the multi-frequency antenna of the present invention, and FIG. 7B shows its VSWR values at different frequencies according to FIG. 7A .

In the sixth embodiment of the present invention, the third slot S3' of the multi-frequency antenna 10f is also similar to an L-shape, so that it is substantially perpendicular to the first radiation area 311. Under this configuration, the VSWR exhibited by the multi-frequency antenna 10f is as shown in FIG. 7B. The multi-frequency antenna 10f can resonate into operable frequency bands around 2GHz, 3GHz and 5GHz.

Next, please refer to FIGS. 8A-8B for related schematic diagrams of a seventh embodiment of the multi-frequency antenna of the present invention. FIG. 8A is a schematic diagram of a seventh embodiment of the multi-frequency antenna of the present invention, and FIG. 8B shows its VSWR values at different frequencies according to FIG. 8A .

The connection position of the short circuit component 50 and the ground component 40 can also be adjusted. In the seventh embodiment of the present invention, the position where the second end 52 of the multi-frequency antenna 10g is connected to the ground component 40 is close to the bottom end of the ground component 40 . Under this configuration, the VSWR exhibited by the multi-frequency antenna 10g is as shown in FIG. 8B. The multi-frequency antenna 10g can resonate into operable frequency bands around 2GHz, 3GHz and 5GHz.

Finally, please refer to FIG. 9 for a system block diagram of the electronic device of the present invention.

In an embodiment of the present invention, the electronic device 60 may be a mobile device such as a notebook computer, but the present invention is not limited thereto. As shown in FIG. 9 , the electronic device 60 of the present invention includes a multi-frequency antenna 10 a and a wireless signal module 61 . The electronic device 60 can use RF Cable (not shown) to feed into the multi-frequency antenna 10a and be electrically connected with the wireless signal module 61, so as to process the signal of the multi-frequency antenna 10a through the wireless signal module 61, such as transmitting or receiving signals . In this way, the electronic device 60 can receive or transmit wireless signals to other devices (not shown) through the multi-frequency antenna 10a, so as to achieve the purpose of wireless communication.

It should be noted here that the electronic device 60 is not limited to having the multi-frequency antenna 10a. According to requirements, the present invention can replace the multi-frequency antenna 10a with any one of the multi-frequency antenna 10b to the multi-frequency antenna 10g of the present invention to receive or transmit wireless signals of different frequency bands.

To sum up, the present invention, regardless of its purpose, means, and efficacy, shows its characteristics that are completely different from the known technology. I urge the examiner to be aware of it and grant a patent as soon as possible to benefit the society. I really appreciate it. However, it should be noted that the above-mentioned embodiments are only examples for the convenience of description, and the scope of rights claimed in the present invention should naturally be based on the scope of the claims, rather than limited to the above-mentioned embodiments.

Claims (20)

1. multifrequency antenna comprises:

One substrate;

One radiation assembly is arranged on the described substrate, and described radiation assembly comprises one first radiation areas and one second radiation areas;

One grounding assembly is arranged on the described substrate, in order to the usefulness as described multifrequency antenna ground connection;

One short-circuit component, be arranged on the described substrate, described short-circuit component comprises one first end and one second end, described first end connects described radiation assembly, described second end connects described grounding assembly, have one first slotted eye between wherein said radiation assembly and the described short-circuit component, described first slotted eye is in order to adjust the operation frequency range of described multifrequency antenna; And

One load point, in order to feed-in one electrical signals, wherein said load point is between a side and described short-circuit component of described substrate;

Wherein, the distance between the last boundary of described second radiation areas of described radiation assembly and the following boundary is greater than the last boundary of described first slotted eye and the distance between the following boundary.

2. multifrequency antenna as claimed in claim 1 has one second slotted eye between wherein said first radiation areas and described second radiation areas, and described second slotted eye is in order to adjust the operation frequency range of described multifrequency antenna.

3. multifrequency antenna as claimed in claim 2, the length of wherein said second slotted eye is greater than 1/2nd of the length of described first radiation areas.

4. multifrequency antenna as claimed in claim 2, wherein said second slotted eye has an opening part, and described opening part is perpendicular or parallel in described first radiation areas.

5. multifrequency antenna as claimed in claim 2, wherein said radiation assembly also comprises an extended matching component, described matching component comprises one first matching area and one second matching area, has one the 3rd slotted eye between described first matching area and described second matching area, described the 3rd slotted eye is in order to adjust the operation frequency range of described multifrequency antenna, and the distance between the last boundary of wherein said second matching area and the following boundary is greater than the last boundary of described the 3rd slotted eye and the distance between the following boundary.

6. multifrequency antenna as claimed in claim 5, the length of wherein said the 3rd slotted eye is greater than 1/2nd of the length of described first matching area.

7. multifrequency antenna as claimed in claim 5, wherein said the 3rd slotted eye is perpendicular or parallel in described first radiation areas.

8. multifrequency antenna as claimed in claim 1, wherein said load point and described radiation assembly are arranged at same plane or the Different Plane on the described substrate.

9. multifrequency antenna as claimed in claim 1, described second end of wherein said short-circuit component is connected in a bottom of described grounding assembly.

10. multifrequency antenna as claimed in claim 1, wherein said radiation assembly, described grounding assembly and described short-circuit component are printed on the described substrate or by a metalwork to be made and is affixed on the described substrate.

11. the electronic installation with multifrequency antenna has the function of a wireless transmission, described electronic installation with multifrequency antenna comprises:

One wireless signal module; And

One multifrequency antenna comprises:

One substrate;

One radiation assembly is arranged on the described substrate, and described radiation assembly comprises one first radiation areas and one second radiation areas;

One grounding assembly is arranged on the described substrate, in order to the usefulness as described multifrequency antenna ground connection;

One short-circuit component, be arranged on the described substrate, described short-circuit component comprises one first end and one second end, described first end connects described radiation assembly, described second end connects described grounding assembly, have one first slotted eye between wherein said radiation assembly and the described short-circuit component, described first slotted eye is in order to adjust the operation frequency range of described multifrequency antenna; And

One load point, in order to feed-in one electrical signals, wherein said load point is between a side and described short-circuit component of described substrate;

Wherein, the distance between the last boundary of described second radiation areas of described radiation assembly and the following boundary is greater than the last boundary of described first slotted eye and the distance between the following boundary.

12. the electronic installation with multifrequency antenna as claimed in claim 11 has one second slotted eye between wherein said first radiation areas and described second radiation areas, described second slotted eye is in order to adjust the operation frequency range of described multifrequency antenna.

13. the electronic installation with multifrequency antenna as claimed in claim 12, the length of wherein said second slotted eye is greater than 1/2nd of the length of described first radiation areas.

14. the electronic installation with multifrequency antenna as claimed in claim 12, wherein said second slotted eye has an opening part, and described opening part is perpendicular or parallel in described first radiation areas.

15. the electronic installation with multifrequency antenna as claimed in claim 12, wherein said radiation assembly also comprises an extended matching component, described matching component comprises one first matching area and one second matching area, has one the 3rd slotted eye between described first matching area and described second matching area, described the 3rd slotted eye is in order to adjust the operation frequency range of described multifrequency antenna, and the distance between the last boundary of wherein said second matching area and the following boundary is greater than the last boundary of described the 3rd slotted eye and the distance between the following boundary.

16. the electronic installation with multifrequency antenna as claimed in claim 15, the length of wherein said the 3rd slotted eye is greater than 1/2nd of the length of described first matching area.

17. the electronic installation with multifrequency antenna as claimed in claim 15, wherein said the 3rd slotted eye is perpendicular or parallel in described first radiation areas.

18. the electronic installation with multifrequency antenna as claimed in claim 11, wherein said load point and described radiation assembly are arranged at same plane or the Different Plane on the described substrate.

19. the electronic installation with multifrequency antenna as claimed in claim 11, described second end of wherein said short-circuit component is connected in a bottom of described grounding assembly.

20. the electronic installation with multifrequency antenna as claimed in claim 11, wherein said radiation assembly, described grounding assembly and described short-circuit component are printed on the described substrate or by a metalwork to be made and is affixed on the described substrate.

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