Dual-frequency antenna with improved structure

Abstract

The utility model discloses a dual-frequency antenna with an improved structure. The dual-frequency antenna comprises a circuit board, a second antenna and at least one matching element, the circuit board is provided with a front surface and a back surface. The front surface comprises a first antenna, a first grounding metal layer, a signal feed-in metal layer and a metal extension section. The back surface comprises a second grounding metal layer and a clearance area. By means of the structural design, the frequency is adjusted, the radiation efficiency is increased, the efficiency is improved, the size is reduced, and the size of a clearance area can be greatly reduced through the overall design. A matching element is electrically connected between the first antenna and the second antenna to be used for matching adjustment, and the two frequency bands can be separated from each other so that the antennas can adapt to various types and environment designs. The first antenna uses the polygonal pattern design of the large-area planar metal layer to increase the antenna bandwidth, so that the cost can also be reduced.

Description

Technical Field

[0001] The utility model relates to an antenna, in particular to a single-feed dual-frequency antenna structure. Background Art

[0002] As is known, existing mobile electronic devices are all equipped with at least one communication system, so that the mobile electronic device can communicate or transfer data with one electronic device or another mobile electronic device over a short distance or a long distance.

[0003] With the continuous advancement of technology, many mobile electronic devices are being designed to be thinner and smaller. To connect with short-range, long-range, or navigation devices or systems, multiple antennas must be installed within the mobile electronic devices. Furthermore, when the internal space of the mobile electronic devices is limited, the size of the circuit boards or other components within the mobile electronic devices must be reduced. Alternatively, when the size of the circuit boards or other components within the mobile electronic devices cannot be reduced any further, the overall size of the antennas must be reduced.

[0004] Since the overall size of the antenna is reduced, it can indeed be integrated with the circuit board and other components of the mobile electronic device. However, the reduction in the overall size of the antenna will lead to a decrease in the antenna's reception and transmission performance, resulting in the mobile electronic device being unable or unable to effectively communicate or transmit data with nearby or remote electronic devices or mobile electronic devices.

[0005] Therefore, how to reduce the overall size of the antenna without reducing the overall performance of the antenna is a problem to be solved by the present invention. Utility Model Content

[0006] Therefore, the primary purpose of this invention is to address the aforementioned issues. This invention redesigns the dual-band antenna, integrating a first antenna made of a planar metal layer and a second antenna made of a cube (chip antenna) to generate 5 GHz and 2.4 GHz frequencies. This improves efficiency, reduces size, and significantly reduces the overall clearance size. A matching element is electrically connected between the first and second antennas for matching adjustments, separating the two frequency bands to facilitate antenna design adaptation to various layouts and environments. The first antenna utilizes a large, planar metal layer with a polygonal pattern to increase antenna bandwidth and reduce costs. Furthermore, a metal extension is electrically connected to the end of the second antenna to adjust the frequency and increase radiation efficiency.

[0007] To achieve the above-mentioned objectives, the present invention provides a dual-band antenna with an improved structure, comprising: a circuit board, a second antenna, and at least one matching element. The circuit board has a front and a back surface, the front surface comprising: a first antenna, a first grounding metal layer, a signal feed metal layer, and a second electrode portion. The back surface comprises: a second grounding metal layer and a clearance area. The second grounding metal layer corresponds to the first grounding metal layer on the front surface, and the clearance area corresponds to the first antenna, the first electrode portion, and the second electrode portion on the front surface. The first antenna is a planar metal layer disposed on the front surface. The first grounding metal layer is disposed on the front surface and is located on one side of the first antenna. The first grounding metal layer has a groove. The signal feed metal layer is disposed on the front surface and is located in the groove, forming a coupling gap with the groove, and has a first electrode portion thereon. The metal extension section is disposed on the front surface and has a second electrode portion corresponding to the first electrode portion. The second antenna has a cubic chip antenna, and the chip antenna is electrically connected to the first electrode portion and the second electrode portion. The matching element is electrically connected to the first antenna and the second antenna.

[0008] In one embodiment of the present invention, the first antenna is a copper foil layer with a planar polygonal pattern, which is used to generate an antenna with a frequency of 5 GHz.

[0009] In one embodiment of the present invention, a first electrical connection point is extended from one side of the first antenna.

[0010] In one embodiment of the present invention, the signal feeding metal layer is composed of a first signal feeding segment and a second signal feeding segment, and a coupling gap is defined between the first signal feeding segment and the second signal feeding segment.

[0011] In one embodiment of the present invention, the first signal feeding section has the first electrode portion, and a second electrical connection point corresponding to the first electrical connection point extends from one side of the first electrode portion, and the first electrical connection point and the second electrical connection point are electrically connected to the matching element.

[0012] In one embodiment of the present invention, the second signal feeding section has an exposed welding point, and the welding point is electrically connected to the signal feeding wire to perform signal reception and transmission transmission.

[0013] In one embodiment of the present invention, the matching element can be electrically connected between the first signal feeding section and the second signal feeding section of the circuit board, and the matching element can be electrically connected between the first signal feeding section and the second signal feeding section and the first ground metal layer.

[0014] In one embodiment of the present invention, the matching element is electrically connected to the first electrical connection point and the second electrical connection point, and is electrically connected to the first antenna and the second antenna.

[0015] In one embodiment of the present invention, the matching element is an inductor or a capacitor.

[0016] In one embodiment of the present invention, the chip antenna has a radiation layer, and the radiation layer is electrically connected to the first electrode portion and the second electrode portion to generate a frequency of 2.4 GHz. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 , is a schematic diagram of the decomposition of the dual-band antenna of the present utility model;

[0018] Figure 2 , is a schematic diagram of the three-dimensional combination of the dual-band antenna of the present utility model;

[0019] Figure 3 ,Tie Figure 2 Schematic diagram of the other side of the circuit board;

[0020] Figure 4 , is a schematic diagram of a three-dimensional combination of the appearance of another dual-band antenna of the present invention. DETAILED DESCRIPTION

[0021] The technical content and detailed description of the present utility model are now described as follows with reference to the accompanying drawings:

[0022] See also Figures 1 to 3 , is a schematic diagram of the decomposition of the dual-band antenna of the utility model, is a schematic diagram of the three-dimensional combination of the dual-band antenna appearance of the utility model and Figure 2 As shown in the figure: The dual-band antenna with an improved structure of the present invention is a single-feed dual-band antenna, which includes: a circuit board 1, a second antenna 2 and at least one matching element 3.

[0023] The circuit board 1 has a front surface 11 and a back surface 12. The front surface 11 includes a first antenna 13, a first ground metal layer 14, a signal feed metal layer 15, and a metal extension 16. Furthermore, the back surface 12 of the circuit board 1 includes a second ground metal layer 17 and a clearance area 18. The second ground metal layer 17 corresponds to the first ground metal layer 14 on the front surface 11 of the circuit board 1, and the clearance area 18 corresponds to the first antenna 13, the first electrode portion 1511, the second electrode portion 161, and the metal extension 16 on the front surface 11 of the circuit board 1.

[0024] The first antenna 13 is a planar metal layer disposed on the front surface 11 of the circuit board 1. A first electrical connection point 131 extends from one side of the first antenna 13. In the figure, the first antenna 13 is a planar polygonal copper foil layer used to generate a 5 GHz frequency antenna.

[0025] The first grounding metal layer 14 is disposed on the front surface 11 of the circuit board 1 and is located on one side of the first antenna 13. The first grounding metal layer 14 has a groove 141. The first antenna 13 branches utilize a large, planar, polygonal (irregular) copper foil layer to increase antenna bandwidth and reduce manufacturing costs.

[0026] The signal feed metal layer 15 is disposed on the front surface 11 of the circuit board 1 and is located within the recess 141, with a coupling gap 142 formed between the recess 141. The signal feed metal layer 15 comprises a first signal feed section 151 and a second signal feed section 152. A coupling gap 153 is defined between the first and second signal feed sections 151, 152. The first signal feed section 151 has a first electrode portion 1511. Extending from one side of the first electrode portion 1511 is a second electrical connection point 1512 corresponding to the first electrical connection point 131. The first and second electrical connection points 131, 1512 are electrically connected to the matching element 3 to facilitate matching and adjustment between the first antenna 13 and the second antenna 2. This also allows for separation of the two frequency bands of the first and second antennas 13 and 2, enabling the first and second antennas 13 and 2 to adapt to various board layouts (circuit board 1) and environmental designs. In addition, the second signal feeding section 152 has an exposed welding point 1521 , and the welding point 1521 is electrically connected to the signal feeding wire (not shown) for signal reception and transmission.

[0027] The metal extension 16 is disposed on the front surface 11 of the circuit board 1, corresponding to the first electrode portion 1511. The metal extension 16 has a second electrode portion 161 corresponding to the first electrode portion 1511. The first electrode portion 1511 and the second electrode portion 161 are used to electrically connect to the second antenna 2. Once the metal extension 16 is electrically connected to the second antenna 2, it is used to adjust the frequency of the second antenna 2 and increase radiation efficiency.

[0028] The second antenna 2 is a cubic chip antenna 21 made of ceramic material. The chip antenna 21 has a radiating layer (not shown) electrically connected to the first electrode portion 1511 and the second electrode portion 161 to generate a 2.4 GHz frequency. The second antenna 2 is electrically connected to the metal extension 16 to adjust the frequency of the second antenna 2 and increase radiation efficiency.

[0029] The matching element 3 is electrically connected to the first electrical connection point 131 and the second electrical connection point 1512, electrically linking the first antenna 13 and the second antenna 2. This serves to adjust the matching between the first antenna 13 and the second antenna 2. It also separates the two frequency bands of the first antenna 13 and the second antenna 2, facilitating the adaptation of the first antenna 13 or the second antenna 2 to various board layouts (circuit board 1) and environmental designs. In this diagram, the matching element 3 is an inductor or a capacitor.

[0030] After the soldering point 1521 on the second signal feeding section 152 of the present invention is electrically connected to a signal feeding wire (not shown), the first antenna 13 and the second antenna 2 can be used to receive and transmit 5 GHz and 2.4 GHz frequency signals, allowing the single-feed dual-band antenna to be used in products such as mobile devices or wireless base stations (Wireless Access Points).

[0031] The improved dual-band antenna of the present invention produces the following benefits through the above-mentioned antenna structure design:

[0032] 1. A dual-band 5 GHz and 2.4 GHz antenna design is created by using the first antenna 13 and the second antenna 2.

[0033] 2. The second antenna 2 is a cubic chip antenna (Chip ANT) 21 designed to improve efficiency and reduce size.

[0034] 3. A matching element 3 is used to electrically connect the first antenna 13 and the second antenna 2 for matching adjustment. The two frequency bands can also be separated from each other, so that the first antenna 13 or the second antenna 2 can adapt to various layouts and environmental designs.

[0035] 4. The first antenna 13 uses a large-area copper foil layer with a planar polygonal (irregular) pattern to increase the antenna bandwidth and reduce the manufacturing cost.

[0036] 5. The second antenna 2 is electrically connected to the metal extension section 16 to adjust the frequency and increase the radiation efficiency.

[0037] 6. The structural design of the integrally fed dual-band antenna can significantly reduce the size of the clearance area.

[0038] See also Figure 4, is a schematic diagram of the three-dimensional appearance of another single-feed dual-band antenna of the present invention. As shown, a matching element 3a can be electrically connected between the first signal feed section 151 and the second signal feed section 152 of the circuit board 1 of the present invention. Furthermore, a matching element 3a can be electrically connected between the first and second signal feed sections 151, 152 and the first ground metal layer 14. In this diagram, the matching element 3a is an inductor or a capacitor.

[0039] By adjusting the first antenna 13 and the second antenna 2 through the matching element 3 a , the frequency band can be controlled to achieve a predetermined target impedance, resonant frequency, bandwidth and radiation efficiency, and the antenna efficiency can be effectively increased.

[0040] However, the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of patent protection of the present invention. Therefore, all equivalent changes made by using the contents of the description or drawings of the present invention are also included in the scope of protection of the present invention and are hereby stated.

[0041] Description of Reference Numerals

[0042] 1: Circuit board

[0043] 11: Positive

[0044] 12: Back

[0045] 13: First Antenna

[0046] 131: First electrical connection point

[0047] 14: First ground metal layer

[0048] 141: Groove

[0049] 142: Coupling spacing

[0050] 15: Signal feed into metal layer

[0051] 151: First signal feeding section

[0052] 1511: First electrode portion

[0053] 1512: Second electrical connection point

[0054] 152: Second signal feeding section

[0055] 1521: Welding point

[0056] 153: Coupling gap

[0057] 16: Metal extension

[0058] 161: Second electrode portion

[0059] 17: Second ground metal layer

[0060] 18: Clearance Zone

[0061] 2: Second Antenna

[0062] 21: Chip antenna

[0063] 3.3a: Matching components

Claims

1. A dual-band antenna with an improved structure, characterized in that: include: A circuit board having a front surface and a back surface, wherein the front surface includes: a first antenna, which is a planar metal layer and is disposed on the front surface; a first grounding metal layer disposed on the front surface and located on one side of the first antenna, the first grounding metal layer having a groove; a signal feeding metal layer, which is disposed on the front surface and located in the groove, with a coupling gap formed between the metal layer and the groove, and has a first electrode portion thereon; a metal extension section disposed on the front surface and having a second electrode portion corresponding to the first electrode portion; as well as The back surface includes: a second ground metal layer and a clearance area; the second ground metal layer corresponds to the first ground metal layer on the front surface, and the clearance area corresponds to the first antenna, the first electrode portion, and the second electrode portion on the front surface; as well as a second antenna having a cubic chip antenna electrically connected to the first electrode portion and the second electrode portion; At least one matching element is electrically connected to the first antenna and the second antenna.

2. The dual-band antenna with an improved structure according to claim 1, wherein: The first antenna is a copper foil layer with a planar polygonal pattern, and is used to generate an antenna with a frequency of 5 GHz.

3. The dual-band antenna with an improved structure according to claim 1, wherein: A first electrical connection point is extended from one side of the first antenna.

4. The dual-band antenna with an improved structure according to claim 3, wherein: The signal feeding metal layer consists of a first signal feeding segment and a second signal feeding segment. A coupling gap is formed between the first signal feeding segment and the second signal feeding segment.

5. The dual-band antenna with an improved structure according to claim 4, wherein: The first signal feeding section has the first electrode portion. A second electrical connection point corresponding to the first electrical connection point is extended from one side of the first electrode portion. The first electrical connection point and the second electrical connection point are used to electrically connect the matching element.

6. The dual-band antenna with an improved structure according to claim 5, wherein: The second signal feeding section has an exposed welding point, and the welding point is electrically connected to the signal feeding wire to perform signal receiving and transmitting transmission.

7. The dual-band antenna with an improved structure according to claim 6, wherein: The matching element is electrically connected between the first signal feeding section and the second signal feeding section of the circuit board. Meanwhile, the matching element is electrically connected between the first signal feeding section, the second signal feeding section and the first ground metal layer.

8. The dual-band antenna with an improved structure according to claim 7, wherein: The matching element is electrically connected to the first electrical connection point and the second electrical connection point, and is electrically connected to the first antenna and the second antenna.

9. The dual-band antenna with an improved structure according to claim 8, wherein: The matching element is an inductor or a capacitor.

10. The dual-band antenna with an improved structure according to claim 1, wherein: The chip antenna has a radiation layer which is electrically connected to the first electrode portion and the second electrode portion to generate a frequency of 2.4 GHz.

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