CN201018480Y - Dual-frequency single-board symmetrical antenna and wireless network device with same - Google Patents

Abstract

An antenna suitable for use on a wireless network device, comprising: a base and two antenna parts. Each antenna part comprises a grounding body, a radiation part and a signal body. The grounding bodies of the two antenna parts are combined on the same base. And the radiation portion with the grounding body is connected, and with the base parallels, the radiation portion has first irradiator and second irradiator, the outer arm body of first irradiator extends to the outer fringe of second irradiator, and with second irradiator phase separation. The signal body is connected with the radiation part, so that the first radiation body and the second radiation body are respectively arranged at two sides, and the free end of the signal body is separated from the base. The antenna is a single component formed by integrally punching and molding a conductive metal sheet, is convenient and quick to manufacture, is convenient to combine on a substrate of the wireless network device, and can improve the gain of the wireless network device in the vertical direction at high frequency and low frequency.

Description

Dual-frequency single-board symmetrical antenna and wireless network device with the same

technical field

The utility model relates to an antenna, in particular to an integrally formed and bilaterally symmetrical dual-frequency shrapnel-type inverted F antenna (Plated Inverted-F Antenna; PIFA for short) suitable for a wireless network device, and a PIFA with the antenna Wireless network device.

Background technique

Please refer to FIG. 1 , which is a perspective view of a typical wireless network device 10 . The wireless network device 10 generally includes: a main body 11, an internal circuit device 12 located inside the main body 11, and a connector part 13 located at one end of the main body 11, which is used to connect to an external host (not shown in the figure) , and an antenna signal transceiving portion 14 located on the body 11 and opposite to the connector portion 13 at the other end. Generally speaking, the outer casing of the antenna signal transceiving part 14 is made of non-metallic material, and when the wireless network device 10 is connected to an external host, the antenna signal transceiving part 14 needs to be exposed to the outside of the external host so as to be able to Effectively send and receive wireless signals.

As shown in FIG. 2 , it is a schematic diagram of a conventional internal circuit device 20 of a wireless network device. The existing internal circuit device 20 of the wireless network device includes: a substrate 21, a control circuit 22 located on the substrate 21, a grounding portion 23 covering a predetermined area on the substrate 21, and an antenna unit 24 It is electrically connected to the control circuit 22 . In the conventional antenna unit 24 shown in FIG. 2, it includes a first antenna 241 and a second antenna 242 respectively located on both sides of the substrate 21. Because the antenna design of the existing internal circuit device 20 is all designed on the substrate 21 in the form of a printed monopole antenna (Printed Monopole Antenna). However, this type of printed antenna is limited by the height difference in the vertical direction, so it can only be achieved by designing different shapes of the first antenna 241 and the second antenna 242 to achieve the desired height on the X-Y plane (in the horizontal direction). A better radiation pattern and higher gain can be obtained, but there is almost no room for improvement in the gain in the vertical Z direction. However, the current design trend of wireless network devices is toward "verticle stand" design to reduce space occupation and at the same time improve the modern and technological sense of appearance of wireless network device products. Obviously, the poor gain of the existing printed antenna in the vertical Z direction cannot meet the requirements of the vertical wireless network device.

For example, as shown in FIG. 3 , it is a radiation pattern diagram obtained by testing the first antenna of the conventional printed antenna unit 24 shown in FIG. 2 on the X-Y plane. It can be seen from the radiation pattern diagram in FIG. 3 that the maximum gain value of the first antenna 241 in the vertical direction (Vertical) is only -15.89dBi, which is obviously lower than the bottom limit that consumers can tolerate ( Generally, the required gain value should be at least higher than -10dBi), which is the general market's requirement for high-efficiency antenna design, and there is obviously room for further improvement.

Contents of the invention

The first purpose of the present utility model is to provide a dual-frequency single-board symmetrical shrapnel antenna, which simultaneously forms the structural design of the antenna parts on both sides through integral stamping to facilitate production and reduce costs.

The second purpose of the present utility model is to provide an antenna suitable for wireless network devices, which is designed with an embedded antenna, can be quickly assembled and combined with wireless network devices, and has a relatively high frequency range in both low-frequency and high-frequency applications. Optimal antenna radiation pattern to increase vertical gain and reduce dead angle.

To achieve the above purpose, a preferred embodiment of the dual-frequency single-board symmetrical shrapnel antenna of the present invention includes: a base and two antenna parts. Each antenna part also includes a radiation part, a signal body and a ground body. The grounding body is combined on the base and is substantially perpendicular to the base; and the radiation part is connected to the grounding body and is generally parallel to the base, The radiating part has a first radiating body and a second radiating body, and an outer arm of the first radiating body extends to the outer edge of the second radiating body, and is in contact with the second radiating body. separate. The signal body is connected to the radiating part, the first radiating body and the second radiating body are respectively arranged on two sides, and a free end of the signal body is separated from the base .

Therefore, when the antenna of the present invention is used in a wireless network device, the wireless network device includes: a substrate, a control circuit, a grounding part, and at least one feed-in line. The substrate is made of dielectric material and has two openings on the substrate. The control circuit is arranged on the substrate and can provide wireless network transmission function. The ground portion is electrically grounded and at least covers a part of the substrate. The feed-in line passes through the ground part and is connected to the control circuit. When the antenna is assembled on the wireless network device, the free end of the signal body is aligned and connected to the opening, and the base is attached to the upper surface of the substrate, while the grounding The body is connected to the ground part, and the signal body is connected to the feed-in line through the free end. Therefore, the wireless network device can obtain a better radiation pattern and a higher gain in the vertical direction, thereby greatly improving the performance of the antenna.

The utility model has the advantages: the antenna of the utility model can not only provide better wireless signal communication quality and transmission efficiency than the prior art in the vertical direction, but also form the structural design of the two-side antenna part at the same time through integral stamping and forming , and can be produced and reduce costs.

Description of drawings

FIG. 1 is a perspective view of a typical wireless network device;

2 is a schematic diagram of a conventional internal circuit device of a wireless network device;

Fig. 3 is the radiation pattern diagram obtained by testing the first antenna of the existing antenna unit shown in Fig. 2 on the X-Y plane;

FIG. 4A is a schematic diagram of a three-dimensional structure of a preferred embodiment of the dual-frequency single-board symmetrical antenna of the present invention;

Fig. 4B is a schematic structural diagram of a top view of a preferred embodiment of the dual-frequency single-board symmetrical antenna of the present invention;

FIG. 5 is a schematic structural diagram of a preferred embodiment of a wireless network device with an antenna of the present invention;

FIG. 6A is a radiation pattern diagram obtained by testing the antenna part in the antenna of the present invention as shown in FIG. 5 on the X-Y plane of the low-frequency application frequency range (2.45 GHz);

Fig. 6B is a radiation field pattern diagram obtained by testing the antenna part in the antenna of the present invention as shown in Fig. 5 on the X-Y plane of the high-frequency application frequency range (5.75 GHz);

FIG. 7 is a graph obtained by testing the return loss of the antenna part in the antenna of the present invention as shown in FIG. 5 .

Explanation of reference signs: 10-wireless network device; 11-body; 12-internal circuit device; 13-connector part; 14-antenna signal transceiver part; 20-existing internal circuit device; 21-substrate; 22-control circuit ; 23 ~ grounding part; 24 ~ antenna unit; 241 ~ first antenna; 242 ~ second antenna; 5 ~ antenna; 51 ~ base; 52, 53 ~ antenna part; 521 ~ grounding body; 522 ~ signal body; 523 ～radiating part; 524～first radiating body; 525～second radiating body; 526～outer arm body; 527～free end; 6～wireless network device; 61～substrate; 611～opening hole; 62～control circuit; 63 ~ grounding part; 64 ~ feed line; h ~ height; s ~ spacing; t ~ thickness; d ~ distance.

Detailed ways

The main principle of the single-board symmetrical antenna of the present invention and the wireless network device with said antenna is mainly to form the structural design of the dual-frequency shrapnel-type inverted F-type antenna (PIFA) by integral stamping and forming at the same time to form the antenna part on both sides. And the antenna can be quickly assembled and combined on the substrate of the wireless network device. Not only can higher vertical gain be obtained, but also it is more convenient to manufacture and use, and saves cost.

Please refer to FIG. 4A and FIG. 4B , which are schematic diagrams of the three-dimensional structure and top view structure of a preferred embodiment of the dual-frequency single-board symmetrical antenna of the present invention, respectively. The dual-frequency single-board symmetrical antenna 5 of the present invention is a single component formed by bending a conductive metal sheet (such as copper, iron, aluminum, etc.) through a stamping integral molding process. Therefore, almost all of them have the same thickness t except for the bend. The single component antenna 5 includes: a base 51 and two antenna parts 52 , 53 . In this preferred embodiment, since the two antenna parts 52 and 53 are substantially symmetrically arranged on both sides of the base 51 respectively, and the shapes of the two antenna parts 52 and 53 substantially correspond to each other. Therefore, only the structure of the single antenna portion 52 will be described below, and the structure of the other antenna portion 53 will not be repeated.

The antenna part 52 further includes a ground body 521 , a signal body 522 and a radiation part 523 . The grounding body 521 is combined with the base 51 and formed by bending the base 51 , and is substantially perpendicular to the base 51 . The radiating portion 523 is connected to the grounding body 521, parallel to the base 51, and has a height h between the radiating portion 523 and the base 51; in this embodiment, the The above-mentioned height h is preferably between 3-4.5 mm.

The radiation part 523 has a first radiator 524 and a second radiator 525 respectively arranged on two sides of the signal body 522. In this preferred embodiment, the length of the first radiator 524 is greater than the dimension length of the second radiator 525, and the first radiator 524 has an outer arm 526 extending to the outer edge of the second radiator 525, and the outer arm 526 is substantially in line with the The second radiator 525 is parallel to the second radiator 525, so that it is separated from the second radiator 525 by a distance d. Through the coupling method between the first radiator 524 and the second radiator 525, dual-frequency use In addition, the predetermined shape and size of the first radiator 524 and the second radiator 525 can be used to change the bandwidth or frequency band of the applied frequency band. The signal body 522 is connected to the radiator 523 . The signal body 522 is combined with the radiation part 523 , is substantially perpendicular to the base 51 , and is separated from the ground body 521 by a distance s. The signal body 522 further has a free end 527 , and the free end 527 is separated from the base 51 .

Please refer to FIG. 5 , which is a schematic diagram of a preferred embodiment of the internal circuit device of the wireless network device with the antenna of the present invention. The wireless network device 6 of the present invention includes: a substrate 61 , a control circuit 62 , a grounding portion 63 , at least one feed-in line 64 and the antenna 5 of the present invention. The substrate 61 is made of dielectric material and is substantially flat and rectangular substrate 61 . The substrate 61 has two openings 611 . The control circuit 62 is disposed on the substrate 61 and includes a circuit layout, several integrated circuit components and several electronic components, and can provide wireless network transmission function. Since the control circuit 62 described here can be used in the prior art and is not the main technical feature of the present invention, its detailed structure will not be described in detail below.

The ground portion 63 is electrically grounded (GND) and covers at least a part of the substrate 61 . In this preferred embodiment, since most of the components of the antenna 5 are the same or similar to the previous embodiments, the same components will be directly given the same names and numbers. Because in the antenna 5, the free ends 527 of each signal body 522 are set corresponding to the openings 611 one by one and connected to each other, so that the base 51 is attached to the upper surface of the substrate 61 , and the grounding body 521 of each antenna part 52, 53 is attached to the grounding part 63 to provide the function of electrical grounding, and the free end 527 of the signal body 522 is connected to the feeding line 64 Connected to provide the function of signal transmission.

Please refer to FIG. 6A and FIG. 6B , which are obtained by testing the antenna part in the antenna of the present invention as shown in FIG. 5 on the X-Y plane of the low-frequency application frequency range (2.45GHz) and the high-frequency application frequency range (5.75GHz). radiation pattern diagram. It can be seen from the radiation pattern diagram of FIG. 6A that when the left antenna part 53 of the present invention is applied in the low frequency band range (2.45GHz), the gain value in the vertical direction (Vatical) can be as high as -4.24dBi; and It can be seen from the radiation field pattern in Fig. 6B that when the antenna part 52 of the present invention is applied in the high-frequency band range (5.75GHz), the gain value in the vertical direction (Vatical) can be as high as -0.36dBi, and the gain effect is obvious. For example, -15.89dBi of the prior art shown in Fig. 2 and Fig. 3 is much higher.

Referring to FIG. 7 again, it is a graph obtained by testing the foldback loss of the antenna part in the antenna of the present invention as shown in FIG. 5 . It can be seen from the graph in Fig. 7 that the foldback loss of the antenna of the present invention is less than -10dB in the frequency bands of 2.4GHz, 2.5GHz, 5.15GHz and 5.85GHz, which is sufficient for the general market's requirements for high-efficiency antenna design. It is conceivable that the antenna 5 of the present invention can not only provide better wireless signal communication quality and transmission efficiency than the prior art in the vertical direction, but also form the structural design of the two-side antenna part at the same time through integral stamping and forming, And can be produced and reduce costs.

The embodiments described above should not be used to limit the applicable scope of the present utility model. The scope of protection of the utility model should be based on the technical spirit defined by the claims of the utility model and the range covered by equal changes. That is, all equal changes and modifications made according to the claims of the utility model will still not lose the gist of the utility model, nor depart from the spirit and scope of the utility model, so all should be regarded as further implementation status of the utility model .

Claims (10)

1. A dual-frequency single-board symmetrical antenna is characterized in that, comprising: a base; and Two antenna parts, each antenna part also includes: a grounding body, which is combined on the base; A radiating part, which is connected to the ground body and parallel to the base, the radiating part has a first radiating body and a second radiating body, and an outer part of the first radiating body the arm extends to the outer edge of the second radiator and is separated from the second radiator; and A signal body, which is connected to the radiation part, the first radiation body and the second radiation body are respectively arranged on two sides, and a free end of the signal body is separated from the base . 2 . The dual-frequency single-board symmetrical antenna according to claim 1 , wherein the antenna is a single component formed by integral stamping and forming of a conductive metal sheet. 3 . 3. The dual-frequency single-board symmetrical antenna as claimed in claim 1, wherein the dimension length of the first radiator is greater than the dimension length of the second radiator; and, the signal body and the The grounding bodies are respectively perpendicular to the base, and the two are separated. 4. The dual-frequency single-board symmetrical antenna according to claim 1, wherein the antenna is embedded on a substrate, and the substrate is further provided with: At least one opening, the position of the opening is corresponding to the free end of the signal body, when the free end of the signal body is inserted and connected to the opening, the base of the antenna is attached to the upper surface of the substrate, and the signal body is electrically connected to the control circuit; A control circuit, providing wireless network transmission function; at least one feed-in line connecting the control circuit and the opening; and, A ground part is electrically grounded and electrically connected to the base. 5. A wireless network device with a dual-frequency single-board symmetrical antenna, characterized in that it includes: A substrate is made of dielectric material, and the substrate has two openings; A control circuit, arranged on the substrate, provides wireless network transmission function; a ground portion, which is electrically grounded and covers at least a part of the substrate; at least one feed-in line passing through the ground and connected to the control circuit; and An antenna, the antenna further includes: a base; and Two antenna parts, each antenna part has a radiation part, a grounding body and a signal body, the grounding body is combined on the base, the radiation part is connected to the grounding body, and the The base is parallel, and the signal body is connected to the radiation part, the first radiator and the second radiator are respectively arranged on two sides, and an outer arm of the first radiator extends to the second radiator. The outer edge of the second radiator is separated from the second radiator, and the signal body has a free end connected to the opening. 6 . The wireless network device with a dual-band single-board symmetrical antenna as claimed in claim 5 , wherein the antenna is formed by integral stamping of a conductive metal sheet. 6 . 7. The wireless network device with a dual-band single-board symmetrical antenna as claimed in claim 5, wherein the dimension length of the first radiator is greater than the dimension length of the second radiator; and, the The signal body and the ground body are respectively perpendicular to the base and separated from each other. 8. The wireless network device with a dual-band single-board symmetrical antenna as claimed in claim 5, wherein the free end of the signal body is separated from the base. 9 . The wireless network device with a dual-band single-board symmetrical antenna as claimed in claim 5 , wherein the grounding body abuts against the grounding portion. 10 . 10. The wireless network device with dual-frequency single-board symmetrical antenna as claimed in claim 5, wherein the feed-in line is connected to the opening, and connects the signal body to the control The circuit is electrically connected.

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