TW201433001A - Dual-band antenna structure and a method of manufacturing the same - Google Patents

Abstract

A dual-band antenna structure includes a first substrate unit, a second substrate unit and an adhesive unit. The first substrate unit includes a first insulative substrate, a first electrode layer and a first ground layer. The second substrate unit includes a second insulative substrate, a second electrode layer and a second ground layer. The second insulative substrate has a second dielectric constant is larger than a first dielectric constant of the first insulative substrate. The pin unit includes a feeding pin sequentially passing through the second substrate unit and the first substrate unit. The feeding pin is separated from the first electrode layer and the second electrode layer and is separated from the first ground layer and the second ground layer. The first substrate unit and the pin unit can be mated with each other to form a first antenna having a first predetermined working frequency band, the second substrate unit and the pin unit can be mated with each other to form a second antenna having a second predetermined working frequency band, and the first predetermined working frequency band is larger than the second predetermined working frequency band.

Description

Dual-band antenna structure and manufacturing method thereof

The invention relates to an antenna structure and a manufacturing method thereof, in particular to a dual-band antenna structure and a manufacturing method thereof.

With the development of communication technologies, various electronic products using wireless communication technologies have been born, such as mobile phones, wireless Internet devices, personal digital assistants, and the like. Consumers' requirements for the performance, design and size of these wireless communication devices are also increasing. Taking mobile phones as an example, the receiving frequency is from single frequency and dual frequency to tri-band and quad-band, and consumers. The appearance of the mobile phone is required to be novel, and has the characteristics of small size, light weight and portability. Furthermore, due to the advancement of communication technology, an antenna with dual-frequency and dual-circular polarization functions is generated, wherein "dual-frequency" means that the antenna can be used in two frequency bands, and such an antenna is used. In those two bands, peaks in the gain are produced and the impedances are matched. However, in the conventional dual-band design, the dual-band circular polarization effect is mostly achieved by the respective feeding modes, or the multiple-pin feeding is used, and the dual-frequency circular polarization is achieved through the Wilkinson circuit or the coupler circuit integration. Antenna characteristics, but in a single-input single-output dual-frequency circuit system that is integrated into a single input, a single feed point or a multiple Pin feed is combined to form a single feed point, which causes distortion of the original antenna characteristics.

The embodiment of the invention provides a dual-band antenna structure and a manufacturing method thereof, so as to effectively solve the problem that the antenna characteristics of the conventional dual-band antenna are distorted.

A dual-band antenna structure provided by one embodiment of the present invention The method includes a first substrate unit, a second substrate unit, and an adhesive unit. The first substrate unit includes a first insulating substrate and a first electrode layer disposed on a top end of the first insulating substrate. The second substrate unit includes a second insulating substrate disposed on the first electrode layer and a second electrode layer disposed on a top end of the second insulating substrate. The pin unit includes at least one feed pin extending through the second electrode layer, the second insulating substrate, the first electrode layer, and the first insulating substrate. The first substrate unit and the pin unit cooperate to form a first antenna having a first predetermined operating frequency band, and the second substrate unit and the pin unit cooperate to form a a second antenna of a second predetermined operating frequency band, and the first predetermined operating frequency band of the first antenna is greater than the second predetermined operating frequency band of the second antenna.

A method for fabricating a dual-band antenna structure according to another embodiment of the present invention includes the following steps: first, providing a first insulating substrate, and disposing a first electrode layer on a top end of the first insulating substrate Then, a second insulating substrate is provided, and a second electrode layer is disposed on the top end of the second insulating substrate; then, the second insulating substrate is disposed on the first electrode layer; finally, Inserting at least one feed pin through the second electrode layer, the second insulating substrate, the first electrode layer and the first insulating substrate, wherein the first substrate unit and the pin The units cooperate to form a first antenna having a first predetermined operating frequency band, and the second substrate unit and the pin unit cooperate to form a second antenna having a second predetermined operating frequency band.

The beneficial effects of the present invention may be that the dual-band antenna structure provided by the embodiment of the present invention is permeable to "the first predetermined working frequency band of the first antenna is greater than the second of the second antenna. Scheduled working frequency band Designed to produce antenna characteristics with high gain, low axial ratio, and impedance matching.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings.

[First Embodiment]

Referring to FIG. 1 , a first embodiment of the present invention provides a dual-band antenna structure Z including a first substrate unit 1 , a second substrate unit 2 , and a pin unit 3 . In the first embodiment, at least one feed pin 30 passes through the first electrode via 110 and is insulated from the first electrode layer 11, and the feed pin 30 passes through the second electrode via 210 and contacts the second electrode layer 21. And the first predetermined working frequency band of the first antenna A1 is greater than the second predetermined working frequency band of the second antenna A2. Further, when the first predetermined working frequency band of the first antenna A1 is greater than the second predetermined working frequency band of the second antenna A2, the feeding pin 30 passes through the first electrode through hole 110 and is opposite to the first electrode layer 11 They are insulated from each other, and the feed pin 30 passes through the second electrode via 210 and contacts the second electrode layer 21, so the feed pin 30 can electrically contact the second electrode layer 21.

[Second embodiment]

As shown in FIG. 2 to FIG. 5 , a second embodiment of the present invention provides a dual-band antenna structure Z including a first substrate unit 1 , a second substrate unit 2 , and a pin unit 3 .

First, the first substrate unit 1 includes a first insulating substrate 10 and a first electrode layer 11 disposed on the top end of the first insulating substrate 10. The bottom end of the first insulating substrate 10 has a first ground layer 12, First insulation The substrate 10 has a first substrate via 100, and the first electrode layer 11 has a first electrode via 110 corresponding to the first substrate via 100 and larger than the first substrate via 100. In addition, the first insulating substrate 10 has a first dielectric constant. For example, the first insulating substrate 10 may be a ceramic substrate, and the first electrode layer 11 may be a conductive layer made of any conductive material.

Furthermore, the second substrate unit 2 includes a second insulating substrate 20 disposed on the first electrode layer 11 and a second electrode layer 21 disposed on the top end of the second insulating substrate 20, wherein the second insulating substrate 20 The bottom end has a second ground layer 22, the second insulating substrate 20 has a second substrate via 200, and the second electrode layer 21 has a second electrode via 210 corresponding to the second substrate via 200 and larger than the second substrate via 200. . In addition, the second insulating substrate 20 has a second dielectric constant. For example, the second insulating substrate 20 may be a ceramic substrate, and the second electrode layer 21 may be a conductive layer made of any conductive material.

In addition, the pin unit 3 includes at least one feeding pin 30 that sequentially penetrates the second electrode layer 21, the second insulating substrate 20, the first electrode layer 11, and the first insulating substrate 10, wherein the feeding pin 30 and the Both the electrode layer 11 and the second electrode layer 21 are insulated from each other, and the feed pin 30 and the first ground layer 12 and the second ground layer 22 are insulated from each other. In addition, the feeding pin 30 sequentially passes through the second electrode through hole 210, the second substrate through hole 200, the first electrode through hole 110 and the first substrate through hole 100 from top to bottom, wherein the feeding pin 30 passes through the second electrode The through holes 210 are separated from the second electrode layer 21 by a predetermined distance, the feed pins 30 pass through the second substrate through holes 200 and contact the second insulating substrate 20, and the feed pins 30 pass through the first electrode through holes 110 and The electrode layers 11 are separated from each other by a predetermined distance, and the feed pins 30 pass through the first substrate vias 100 and contact the first insulating substrate 10. Further, such as As shown in FIG. 5, the feed pin 30 has an exposed portion 30A disposed on the top end of the second insulating substrate 20, a downward extending portion from the protruding portion 30A, and simultaneously embedded in the second insulating substrate 20 and the first The inner fitting portion 30B in the substrate unit 1 and a pin portion 30C extending downward from the inner fitting portion 30B and exposed from the bottom end of the first insulating substrate 10

Thereby, the first substrate unit 1 and the pin unit 3 can cooperate to form a first antenna A1 having a first predetermined operating frequency band (for example, for receiving a SDARS (Satellite Digital Audio Radio Service) signal), and a second The substrate unit 2 and the pin unit 3 can cooperate to form a second antenna A2 having a second predetermined operating frequency band (for example, for receiving a GPS (Global Positioning System) signal), and the first antenna A1 is first. The predetermined working frequency band is greater than the second predetermined operating frequency band of the second antenna A2. For example, the first antenna A1 and the second antenna A2 may be linear, left-handed, or right-handed antennas.

Furthermore, as shown in FIG. 4, the first electrode layer 11 has two first trims 111 formed on one of the first diagonals D10 of the first electrode layer 11 (for example, a cut of about 45 degrees). And a first corner 112 formed on the other first diagonal D11 of the first electrode layer 11 (for example, a corner of about 90 degrees). The second electrode layer 21 has two second trimming edges 211 formed on one of the second diagonal lines D20 of the second electrode layer 21 and adjacent to the two first corners 112, respectively (for example, a truncated angle of about 45 degrees) And two second corners 212 formed on the other second diagonal D21 of the second electrode layer 21 and adjacent to the two first trims 111, respectively (for example, a corner of about 90 degrees), so that the first day Both the line A1 and the second antenna A2 form a circularly polarized antenna.

In addition, referring to FIG. 5 and FIG. 6, the dual-band antenna structure Z of the present invention further includes: an adhesive unit 4, which includes a first A first adhesive sheet 41 on the bottom end of the ground layer 12 and a second adhesive sheet 42 disposed between the second ground layer 22 and the first electrode layer 11. Therefore, the second substrate unit 2 can be attached and stacked on the first substrate unit 1 through the second adhesive sheet 42, and the first substrate unit 1 can be attached to a motherboard 5 through the first adhesive sheet 41.

As shown in FIG. 2 and FIG. 7 , the present invention further provides a method for fabricating a dual-band antenna structure Z, which includes the following steps: First, a first insulating substrate 10 is provided, and a first electrode layer 11 is disposed on the first On the top end of an insulating substrate 10, the bottom end of the first insulating substrate 10 has a first ground layer 12, the first insulating substrate 10 has a first dielectric constant (S100); and then, a second insulating substrate 20 is provided. And a second electrode layer 21 is disposed on the top end of the second insulating substrate 20, wherein the bottom end of the second insulating substrate 20 has a second ground layer 22, and the second insulating substrate 20 has a second dielectric constant. The second dielectric substrate 20 has a second dielectric constant greater than the first dielectric constant of the first insulating substrate 10 (S102); then, the second insulating substrate 20 is disposed on the first electrode layer 11 (S104); The at least one feed pin 30 sequentially penetrates the second electrode layer 21, the second insulating substrate 20, the first electrode layer 11, and the first insulating substrate 10, wherein the first substrate unit 1 and the pin unit 3 cooperate with each other. Forming a first antenna A1 having a first predetermined operating frequency band, The second substrate unit 2 and the pin unit 3 cooperate to form a second antenna A2 having a second predetermined operating frequency band (S106), wherein the first predetermined working frequency band of the first antenna A1 is greater than the next day. In the second predetermined working frequency band of the line A2, since the first electrode through hole 110 is larger than the first substrate through hole 100, and the second electrode through hole 210 is larger than the second substrate through hole 200, when the feeding pin 30 passes through the first electrode through hole 110 When the second electrode via 210 is used, the feed pin 30 and the first electrode layer 11 and The second electrode layers 21 are separated from each other by a predetermined distance to produce an effect of insulating each other.

〔In summary〕

The invention adopts a high dielectric constant substrate or a low dielectric constant substrate to generate a low frequency band and a high frequency band, is designed and manufactured by stacking method, and then uses the pin to excite energy, so that the two antennas simultaneously receive or transmit signals to different frequency bands, and in design, A dual-band modality can be produced after the groove design (ie, the insulation design with the electrode layer) is required at the feed point. This technology can make the high-band antennas have the same characteristics as the single antennas, but the low-band antennas can also have better characteristics, the gain value will not be reduced too much, and the antenna can be made to the impedance value. Adjustments can be made to maintain an axial ratio of less than 3 dB in the dual-band ratio. Because of the single feed design, in the single feed and single output dual frequency circuit system, the problem of antenna characteristic variation does not occur. Of course, the antenna can also be designed to generate dual-frequency characteristics (ie, the second embodiment) without using a groove design on the second antenna feed point. Of course, the characteristics of the low frequency characteristic are low, and the high frequency characteristic can be It is close to the single antenna characteristic and can maintain an axial ratio of less than 3 dB in the dual-band axial ratio.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalents of the invention are included in the scope of the invention.

Z‧‧‧Antenna structure

A1‧‧‧first antenna

A2‧‧‧second antenna

1‧‧‧First substrate unit

10‧‧‧First insulating substrate

100‧‧‧First substrate perforation

11‧‧‧First electrode layer

110‧‧‧First electrode perforation

111‧‧‧First trimming

112‧‧‧First corner

D10, D11‧‧‧ first diagonal

12‧‧‧First ground plane

2‧‧‧Second substrate unit

20‧‧‧Second insulating substrate

200‧‧‧Second substrate perforation

21‧‧‧Second electrode layer

210‧‧‧Second electrode perforation

211‧‧‧Second trimming

212‧‧‧second corner

D20, D21‧‧‧ second diagonal

22‧‧‧Second ground plane

3‧‧‧ pin unit

30‧‧‧Feeding pins

30A‧‧‧Protruding

30B‧‧‧Inline Department

30C‧‧‧foot

4‧‧‧Adhesive unit

41‧‧‧First Adhesive

42‧‧‧Second Adhesive Patch

5‧‧‧ motherboard

Figure 1 is a side elevational view of a first embodiment of the present invention.

2 is a perspective exploded view of a second embodiment of the present invention.

3 is a schematic perspective view of a second embodiment of the present invention.

Figure 4 is a top plan view of a second embodiment of the present invention.

Figure 5 is a side elevational view of a second embodiment of the present invention.

Figure 6 is a side elevational view showing the second embodiment of the present invention using an adhesive unit.

Figure 7 is a flow chart of a method of fabricating a second embodiment of the present invention.

Z‧‧‧Antenna structure

A1‧‧‧first antenna

A2‧‧‧second antenna

1‧‧‧First substrate unit

10‧‧‧First insulating substrate

100‧‧‧First substrate perforation

11‧‧‧First electrode layer

110‧‧‧First electrode perforation

12‧‧‧First ground plane

2‧‧‧Second substrate unit

20‧‧‧Second insulating substrate

200‧‧‧Second substrate perforation

21‧‧‧Second electrode layer

210‧‧‧Second electrode perforation

22‧‧‧Second ground plane

3‧‧‧ pin unit

30‧‧‧Feeding pins

30A‧‧‧Protruding

30B‧‧‧Inline Department

30C‧‧‧foot

4‧‧‧Adhesive unit

41‧‧‧First Adhesive

42‧‧‧Second Adhesive Patch

Claims (16)

A dual-band antenna structure includes: a first substrate unit including a first insulating substrate and a first electrode layer disposed on a top end of the first insulating substrate; and a second substrate unit including a a second insulating substrate disposed on the first electrode layer and a second electrode layer disposed on a top end of the second insulating substrate; and a pin unit including at least one through the second a feeding pin of the electrode layer, the second insulating substrate, the first electrode layer and the first insulating substrate, wherein at least one of the feeding pins electrically contacts the second electrode layer; The first substrate unit and the pin unit cooperate to form a first antenna having a first predetermined operating frequency band, and the second substrate unit and the pin unit cooperate to form a first And a second antenna of the predetermined working frequency band, and the first predetermined working frequency band of the first antenna is greater than the second predetermined working frequency band of the second antenna. The dual-band antenna structure according to claim 1, wherein the first electrode layer has two first trimming edges and two formed on one of the first diagonal lines of the first electrode layer. a first corner on the other first diagonal of the first electrode layer, and the second electrode layer has two formed on a second diagonal of the second electrode layer and adjacent to each of the two a second trimming edge of the first corner and two second corners formed on the other second diagonal of the second electrode layer and adjacent to the two first trimming edges respectively, so that the Both the first antenna and the second antenna form a circularly polarized antenna. The dual-band antenna structure of claim 1, wherein at least one of the feed pins has an exposed portion disposed on a top end of the second electrode layer, and a protrusion from the protrusion a portion extending downwardly and simultaneously embedded in the first substrate unit and the second substrate unit, and a downward extending from the embedded portion and exposed from a bottom end of the first insulating substrate Out the pin. The dual-band antenna structure of claim 1, wherein the first insulating substrate has a first substrate through-hole, and the first electrode layer has a first electrode perforation corresponding to the first substrate through-hole. The second insulating substrate has a second substrate through hole, the second electrode layer has a second electrode through hole corresponding to the second substrate through hole, and at least one of the feeding pins sequentially passes through the a second electrode perforation, the second substrate perforation, the first electrode perforation and the first substrate perforation, at least one of the feeding pins passing through the first electrode perforation and the first electrode layer Insulating each other, and at least one of the feed pins is perforated through the second electrode and contacts the second electrode layer. The dual-band antenna structure of claim 1, further comprising: an adhesive unit, wherein a bottom end of the first insulating substrate has a first ground layer, and a bottom end of the second insulating substrate has a second ground layer, at least one of the feed pins and the first ground layer and the second ground layer are insulated from each other, and the adhesive unit includes a bottom end disposed on the first ground layer The first adhesive sheet and a second adhesive sheet disposed between the second ground layer and the first electrode layer. The dual-band antenna structure of claim 1, wherein the first insulating substrate has a first dielectric constant, the second insulating substrate has a second dielectric constant, and the second insulating The first of the substrate The two dielectric constants are greater than the first dielectric constant of the first insulating substrate. A dual-band antenna structure includes: a first substrate unit including a first insulating substrate and a first electrode layer disposed on a top end of the first insulating substrate; and a second substrate unit including a a second insulating substrate disposed on the first electrode layer and a second electrode layer disposed on a top end of the second insulating substrate; and a pin unit including at least one through the second a feeding pin of the electrode layer, the second insulating substrate, the first electrode layer and the first insulating substrate, wherein at least one of the feeding pin and the first electrode layer and the second The electrode layers are insulated from each other; wherein the first substrate unit and the pin unit cooperate to form a first antenna having a first predetermined operating frequency band, the second substrate unit and the pin The units cooperate to form a second antenna having a second predetermined operating frequency band, and the first predetermined operating frequency band of the first antenna is greater than the second predetermined operating frequency band of the second antenna. The dual-band antenna structure of claim 7, wherein the first electrode layer has two first trimming edges and two formed on one of the first diagonal lines of the first electrode layer. a first corner on the other first diagonal of the first electrode layer, and the second electrode layer has two formed on a second diagonal of the second electrode layer and adjacent to each of the two a second trimming edge of the first corner and two second corners formed on the other second diagonal of the second electrode layer and adjacent to the two first trimming edges respectively, so that the First antenna and said The second antennas all form a circularly polarized antenna. The dual-band antenna structure of claim 7, wherein at least one of the feed pins has a protruding portion disposed on a top end of the second insulating substrate, and a protruding portion a portion extending downwardly and simultaneously embedded in the second insulating substrate and the first substrate unit, and a lower portion extending from the embedded portion and exposed from a bottom end of the first insulating substrate Out the pin. The dual-band antenna structure of claim 7, wherein the first insulating substrate has a first substrate via, and the first electrode layer has a corresponding one of the first substrate and is larger than the first a first electrode perforated by a substrate, the second insulating substrate has a second substrate through hole, and the second electrode layer has a second electrode corresponding to the second substrate through hole and larger than the second substrate through hole The at least one of the feed pins sequentially passes through the second electrode through hole, the second substrate through hole, the first electrode through hole, and the first substrate through hole, and at least one of the feed pins Passing through the first electrode and separating from the first electrode layer by a predetermined distance, and at least one of the feed pins is pierced through the second electrode and separated from the second electrode layer Scheduled distance. The dual-band antenna structure of claim 7, further comprising: an adhesive unit, wherein the bottom end of the first insulating substrate has a first ground layer, and the bottom end of the second insulating substrate has a second ground layer, at least one of the feed pins and the first ground layer and the second ground layer are insulated from each other, and the adhesive unit includes a bottom end disposed on the first ground layer The first adhesive sheet and a second adhesive sheet disposed between the second ground layer and the first electrode layer. The dual-band antenna structure of claim 7, wherein the first insulating substrate has a first dielectric constant, the second insulating substrate has a second dielectric constant, and the second insulating The second dielectric constant of the substrate is greater than the first dielectric constant of the first insulating substrate. A method for fabricating a dual-band antenna structure includes the steps of: providing a first insulating substrate, and disposing a first electrode layer on a top end of the first insulating substrate; providing a second insulating substrate, and placing a a second electrode layer is disposed on a top end of the second insulating substrate; the second insulating substrate is disposed on the first electrode layer; and at least one feed pin is sequentially penetrated through the second electrode layer The second insulating substrate, the first electrode layer and the first insulating substrate, wherein the first substrate unit and the pin unit cooperate to form a first one having a first predetermined operating frequency band And an antenna, and the second substrate unit and the pin unit cooperate to form a second antenna having a second predetermined operating frequency band. The method for fabricating a dual-band antenna structure according to claim 13 , wherein the first insulating substrate has a first dielectric constant, the second insulating substrate has a second dielectric constant, and The second dielectric constant of the second insulating substrate is greater than the first dielectric constant of the first insulating substrate The method for fabricating a dual-band antenna structure according to claim 13 , wherein the first predetermined working frequency band of the first antenna is greater than the second predetermined working frequency band of the second antenna, at least The feed pin and the first electrode layer and the second electrode layer are mutually exclusive edge. The method for fabricating a dual-band antenna structure according to claim 13 , wherein when the first predetermined working frequency band of the first antenna is greater than the second predetermined operating frequency band of the second antenna, At least one of the feed pins electrically contacts the second electrode layer.