TWI612721B - Electronic device having antenna - Google Patents

Abstract

An electronic device having an antenna includes a first metal housing, a second metal housing, a first metal shaft, a second metal shaft, a slotted antenna structure, and a feed unit. The first metal housing, the first metal rotating shaft, the second metal housing and the second metal rotating shaft constitute a closed slot antenna structure. The slotted antenna structure is disposed on the first metal housing. The orthographic projection of the first metal shaft on the first side of the first metal housing is encompassed by the orthographic projection of the slotted antenna structure at the first side of the first metal housing. The feed unit spans the slotted antenna structure to excite the quarter-wave resonant mode of the slotted antenna structure. The slotted antenna structure couples energy to the closed slot antenna structure by the intermediate metal portion of the first metal housing to excite the full wavelength resonant mode of the closed slot antenna structure.

Description

Electronic device with antenna

The present invention relates to an electronic device, and more particularly to an electronic device having an antenna on a rotating shaft.

An electronic device with wireless communication capability or wireless networking capability is important for carrying convenience. For example, a notebook computer is a portable computer device. Referring to FIG. 1, the appearance of the notebook computer is mainly divided into three parts, namely, an upper cover 1 having a screen, a rotating shaft 2 and a lower cover 3, and the rotating shaft 2 is used for connecting the upper cover 1 and the lower cover 3. Because of the development of wireless networks, existing notebook computers have the necessary wireless network functions, and often use built-in antennas to keep the appearance simple, but most of them still consider the application of multiple communication bands, such as having operations at 2.4 at the same time. The IEEE 802.11b/g specification of the GHz band and the IEEE 802.11a/n/ac specification of the wireless local area network (WLAN) function of the 5 GHz band. Even some novel notebooks are required to support wireless wide area network (WWAN) applications, such as the wireless networking capabilities of Long Term Evolution (LTE), which enable the wireless communication band used by notebook devices. The bandwidth is getting bigger and bigger.

The hidden design antenna of a typical notebook computer is usually disposed on the portion of the upper cover 1. However, in order to emphasize the aesthetic appearance of the current notebook computer, manufacturers often reduce the screen frame of the upper cover 1 to a large extent, so that the position of the antenna is greatly limited, and even the product uses a metal casing design. Therefore, in the same wireless communication product Quality and even higher wireless transmission performance are a serious challenge for antenna design technicians for notebook computers.

Embodiments of the present invention provide an electronic device having an antenna, and the antenna structure is applicable to an electronic device having a metal casing and a rotating shaft.

Embodiments of the present invention provide an electronic device having an antenna, including a first metal housing, a second metal housing, a first metal rotating shaft, a second metal rotating shaft, a slotted antenna structure, and a feeding unit. The first metal housing has a first side. The second metal housing has a second side. The first metal shaft is coupled between the first side of the first metal housing and the second side of the second metal housing. The second metal rotating shaft is coupled between the first side of the first metal housing and the second side of the second metal housing, wherein the first metal housing, the first metal shaft, the second metal housing and the second The metal shaft constitutes a closed slot antenna structure. The slotted antenna structure is disposed on the first metal shell, and the opening of the slotted antenna structure is located on the third side of the first metal shell, and the third side and the first side are connected to each other, and the slotted antenna structure is The closed slot antenna structures are parallel to each other, and the orthographic projection of the first metal rotating shaft on the first side of the first metal housing is covered by the orthographic projection of the slotted antenna structure on the first side of the first metal housing The first metal casing has an intermediate metal portion, and the intermediate metal portion is located between the slotted antenna structure and the closed slot antenna structure. The feeding unit spans the slotted antenna structure to excite the quarter-wave resonant mode of the slotted antenna structure, wherein the feeding unit is disposed on the first side of the microwave substrate, and the microwave substrate is in contact with the second surface A metal housing, the first side and the second side of the microwave substrate being parallel to each other. The feed unit is configured to excite the current of the intermediate metal portion, and the slotted antenna structure couples energy to the closed-cell antenna structure by the intermediate metal portion to excite the full-wavelength resonant mode of the closed-cell antenna structure.

In summary, an embodiment of the present invention provides an electronic device having an antenna, wherein the antenna can realize a closed-cell antenna structure by using two metal casings and a rotating shaft of the electronic device, and is provided in a slotted manner of the first metal casing. The aperture antenna structure couples energy through the intermediate metal portion of the first metal housing to the closed slot antenna structure to excite the resonant mode of the closed slot antenna structure. Accordingly, the antenna can be integrated into the metal housing and the rotating shaft of the electronic device.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings The scope is subject to any restrictions.

1‧‧‧Upper cover

2‧‧‧ shaft

3‧‧‧Under the cover

4‧‧‧First metal shell

41‧‧‧First side

43‧‧‧ Third side

49‧‧‧ screen

401‧‧‧Intermediate Metals Department

5a‧‧‧First metal shaft

5b‧‧‧Second metal shaft

6‧‧‧Second metal casing

61‧‧‧ second side

7‧‧‧Slotted antenna structure

71‧‧‧ openings

8‧‧‧Closed slot antenna structure

9‧‧‧Feeding unit

90‧‧‧Microwave substrate

901‧‧‧ first side

902‧‧‧ second side

92‧‧‧Impedance matching unit

99‧‧‧ conductive adhesive

P1‧‧‧Feeding end

P2‧‧‧ Grounding terminal

A, B, C‧‧‧ return loss curve

M1‧‧‧ Quarter Wave Resonance Mode

M2‧‧‧Full-wavelength resonance mode

D‧‧‧Distance

Figure 1 is a schematic diagram of a conventional notebook computer.

2 is a schematic diagram of an electronic device with an antenna according to an embodiment of the present invention.

FIG. 3A is a schematic diagram of a feeding unit of an electronic device with an antenna and a microwave substrate thereof according to an embodiment of the invention.

FIG. 3B is a diagram showing the return loss of the slotted antenna structure and the closed slot antenna structure according to the embodiment of the present invention.

4 is a schematic diagram of a feeding unit of an electronic device with an antenna and a microwave substrate thereof assembled by a conductive adhesive to a first metal housing according to an embodiment of the invention.

FIG. 5 is a partially enlarged schematic view showing a slotted antenna structure and a closed slot antenna structure of an electronic device with an antenna according to an embodiment of the present invention.

FIG. 6 is a diagram showing return loss of a slotted antenna structure and a closed slot antenna structure according to an embodiment of the present invention.

FIG. 7 is a partially enlarged schematic view showing a slotted antenna structure and a closed slot antenna structure of an electronic device with an antenna according to another embodiment of the present invention.

The electronic device in the embodiment of the present invention is exemplified by a notebook computer, but the present invention is not limited thereto. The antenna design of the embodiment of the present invention is applicable to an electronic device having two housings and a rotating shaft connecting the two. Please refer to FIG. 2. FIG. 2 is a schematic diagram of an electronic device with an antenna according to an embodiment of the present invention. The electronic device with an antenna of this embodiment is a notebook computer including a first metal housing 4, a second metal housing 6, a first metal shaft 5a, a second metal shaft 5b, a slotted antenna structure 7, and a feed Enter unit 9. The upper cover and the lower cover of the notebook computer of the embodiment of the invention respectively include a first metal housing 4 and a second metal housing 6. The first metal casing 4 is a metal back cover of the screen 49, but the frame of the screen 49 may not be metal. The arrangement of the keyboard, the touchpad, and the like provided in the second metal casing 6 is omitted in FIG. 2, thereby highlighting the main components of the embodiment. The shapes of the first metal rotating shaft 5a and the second metal rotating shaft 5b in the figure are only for illustration, and the present invention does not limit the shape of the metal rotating shaft used.

Please refer to FIG. 2 and FIG. 3A simultaneously. FIG. 3A is a schematic diagram of a feeding unit of an electronic device with an antenna and a microwave substrate thereof according to an embodiment of the present invention. The first metal housing 4 has a first side 41. The second metal housing 6 has a second side 61. The first metal shaft 5a is coupled between the first side 41 of the first metal casing 4 and the second side 61 of the second metal casing 6. The second metal shaft 5b is connected between the first side 41 of the first metal casing 4 and the second side 61 of the second metal casing 6, wherein the first metal casing 4, the first metal shaft 5a, the first The two metal housings 6 and the second metal shaft 5b constitute a closed slot antenna structure 8. The slotted antenna structure 7 is disposed on the first metal housing 4, and has a slotted hole The opening 71 of the antenna structure 7 is located on the third side 43 of the first metal casing 4, and the third side 43 and the first side 41 are connected to each other, and the third side 43 is, for example, a non-metallic frame connecting the screen 49. The slotted antenna structure 7 and the closed slot antenna structure 8 are parallel to each other, and the orthographic projection of the first metal rotating shaft 5a at the first side 41 of the first metal casing 4 is covered by the slotted antenna structure 7 at the first The front projection of the first side 41 of the metal casing 4 is in the middle. The first metal housing 4 has an intermediate metal portion 401 between the slotted antenna structure 7 and the closed slot antenna structure 8. The feed unit 9 spans the slotted antenna structure 7 to excite the quarter-wave resonant mode of the slotted antenna structure 7. The feeding unit 9 is disposed on the first surface 901 of the microwave substrate 90 (the microwave substrate is, for example, a fiberglass substrate, such as an FR4 substrate), and the microwave substrate 90 is disposed on the inner side of the first metal housing 4 to be embedded in the electronic device. The first surface 902 is in contact with the first metal casing 4 in the entire casing, and the first surface 901 and the second surface 902 of the microwave substrate 90 are parallel to each other. The feeding unit 9 has a feeding end P1, and is generally soldered to the feeding end P1 by a center wire of a coaxial cable, and the outer conductor of the coaxial cable is tinned to the first metal casing 4, such as 3A is an example in which the outer conductor of the coaxial cable is connected to the ground terminal P2. The feed unit 9 is used to excite the current of the intermediate metal portion 401. The slotted antenna structure 7 couples energy to the closed-cell antenna structure 8 by the intermediate metal portion 401 to excite the full-wavelength resonant mode of the closed-cell antenna structure 8. .

Please refer to FIG. 3B. FIG. 3B is a diagram showing the return loss of the slotted antenna structure and the closed slot antenna structure according to the embodiment of the present invention. The frequency of the quarter-wave resonance mode of the slotted antenna structure 7 covers, for example, the Long Term Evolution (LTE) 710 MHz band, which is modal M1 in FIG. 3B. The quarter-wavelength resonant mode of the slotted antenna structure 7 may also be in the frequency band of GSM 850, GSM 900 (the frequency ranges are 824-960 MHz and 880-960 MHz, respectively). Full-wavelength resonant mode of closed-cell antenna structure 8 The frequency of the state covers, for example, the 960 MHz band of the Wide Area Wireless Network (WWLAN), which is modal M2 in FIG. 3B. However, the above frequencies are for illustrative purposes only and are not intended to limit the invention. The parameters of the slotted antenna structure 7, the closed slot antenna structure 8 and the feed unit 9 corresponding to the return loss curve of Fig. 3B are as follows. The length of the closed-cell antenna structure 8 is the distance between the first metal rotating shaft 5a and the second metal rotating shaft 5b, which is 290 millimeters (mm). The width of the closed-cell antenna structure 8 is the distance between the first side 41 of the first metal casing 4 and the second side 61 of the second metal casing 6, which is 8 mm. The length of the slotted antenna structure 7 (parallel to the closed slot antenna structure 8) is 60 mm, and the width of the slotted antenna structure 7 is the width of the opening 71, which is 3.2 mm. The distance D between the feed unit 9 and the opening 71 is 42.5 mm. In the present embodiment, in order to facilitate setting of the operating frequency, the length of the slotted antenna structure 7 is generally made shorter than the length of the closed slot antenna structure 8. The width of the intermediate metal portion 401 is the distance between the slotted antenna structure 7 and the closed slot antenna structure 8, which is 14 mm. In addition, the feeding unit 9 also includes an impedance matching unit 92, which is provided, for example, as shown in FIG. 3A, and the slotted antenna structure 7 is located in the front projection and middle of the impedance matching unit 92 in the first metal casing 4. Between the metal portions 401. Alternatively, as shown in FIG. 7, the orthographic projection of the impedance matching unit 92 at the first metal casing 4 is located at the intermediate metal portion 401.

Referring to FIG. 3A again, it should be noted that the first metal casing 4 is the metal back cover of the screen 49 of the casing, and the other parts of the casing upper cover to which the third side 43 of the first metal casing 4 is connected ( For example, the frame of the screen 49 can be non-metallic, at least in the vicinity of the opening 71 of the slotted antenna structure 7, the other parts of the casing are non-metallic, whereby an open slot can be realized after the integral casing is assembled. It should be noted that the size, shape, and aspect ratio of the slotted antenna structure 7, the feed unit 9 and the microwave substrate 90 are adjusted to help identify the components, and the present invention is implemented in the embodiment of the present invention. The figure in the example shows the slotted antenna structure 7, the feed unit 9 and the microwave The size, shape and aspect ratio of the substrate 90 are not intended to limit the invention. The microwave substrate 90 is locked to the inner side of the first metal casing 4 by, for example, a locking component, or the second surface 902 of the microwave substrate 90 is bonded to the first metal casing by using a conductive adhesive 99 or a metal foil. The inside of 4

5 is a partial enlarged view of a slotted antenna structure and a closed slot antenna structure of an electronic device with an antenna according to an embodiment of the present invention, and FIG. 6 is a schematic diagram of an embodiment of the present invention. Return loss map of slotted antenna structure and closed slot antenna structure. The microwave substrate 90 is omitted in FIG. The distance D between the feed unit 9 and the opening 71 of the slotted antenna structure 7 is used to adjust the frequency of the quarter-wave resonance mode of the slotted antenna structure 7, the return loss curves A, B in FIG. C corresponds to the case where the distance D is 42.5 mm (mm), 35.5 mm, and 25.5 mm, respectively. As the distance D between the feed unit 7 and the opening 71 of the slotted antenna structure 7 increases, the frequency of the quarter-wave resonance mode M1 of the slotted antenna structure 7 increases. Moreover, it can be seen from FIG. 6 that the distance D between the feed unit 9 and the opening 71 of the slotted antenna structure 7 is also used to adjust the impedance matching of the full-wavelength resonant mode M2 of the closed-cell antenna structure 8. However, the distance D does not affect the frequency of the full-wavelength resonant mode M2 of the closed-cell antenna structure 8. When the distance D between the feed unit 9 and the opening 71 of the slotted antenna structure 7 is increased, the impedance of the full-wavelength resonant mode M2 of the closed-cell antenna structure 8 is closer to 50 ohms, that is, the impedance matching is better. However, in order to adjust the frequency point of the quarter-wavelength resonance mode M1 of the slotted antenna structure 7, the distance D has an appropriate value depending on the frequency selection requirement.

Furthermore, in the embodiment of the present invention, the high-order resonant mode of the slotted antenna structure and the high-order resonant mode of the closed-cell antenna structure may be a wireless network application frequency band corresponding to 2.4 GHz. Alternatively, the frequency of the above higher-order mode may also be corresponding to the GSM 1800/1900/UMTS (1710-2170 MHz) band, for example. Or the frequency band of LTE 2300/2500 (2300-2690MHz), for example, the frequency band of the wireless network application of 5 GHz. However, the above-mentioned frequency bands are only for exemplification, and the present invention does not thus limit the high-order resonant mode of the slotted antenna structure and the application band of the high-order resonant mode of the closed-cell antenna structure.

In summary, the electronic device with an antenna provided by the embodiment of the present invention is suitable for an electronic device having a metal casing, not only using a metal back cover (first metal casing) to realize a slotted hole, but also a closed slot antenna The structure is integrated into the shaft of the electronic device. Furthermore, according to the embodiment of the present invention, the antenna design provided by the embodiment of the present invention can be applied to, for example, LTE 710 MHz, wireless wide area network (WWAN) 960 MHz, GSM 850 (824-960 MHz), GSM 900 (880-960 MHz). Applications such as GSM 1800/1900/UMTS (1710-2170MHz), LTE 2300/2500 (2300-2690MHz), 2.4GHz wireless local area network (WLAN), and 5GHz WiFi wireless LAN.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

4‧‧‧First metal shell

41‧‧‧First side

43‧‧‧ Third side

49‧‧‧ screen

401‧‧‧Intermediate Metals Department

5a‧‧‧First metal shaft

5b‧‧‧Second metal shaft

6‧‧‧Second metal casing

61‧‧‧ second side

7‧‧‧Slotted antenna structure

8‧‧‧Closed slot antenna structure

9‧‧‧Feeding unit

90‧‧‧Microwave substrate

Claims (10)

An electronic device having an antenna, comprising: a first metal housing having a first side; a second metal housing having a second side; a first metal shaft coupled to the first metal shell Between the first side of the body and the second side of the second metal housing; a second metal shaft coupled to the first side of the first metal housing and the second metal housing Between the second side edges, the first metal housing, the first metal rotating shaft, the second metal housing and the second metal rotating shaft form a closed slot antenna structure; a slotted antenna structure, An opening of the first metal housing is disposed on a third side of the first metal housing, and the third side is connected to the first side, and the slot is The antenna structure and the closed-cell antenna structure are parallel to each other, and an orthographic projection of the first metal rotating shaft on the first side of the first metal housing is included in the slotted-hole antenna structure in the first metal shell In the orthographic projection of the first side, wherein the first metal casing has a middle a metal portion between the slotted antenna structure and the closed slot antenna structure; and a feed unit spanning the slotted antenna structure to excite the slotted antenna structure a one-wavelength resonance mode, wherein the feeding unit is disposed on a first surface of a microwave substrate, and the microwave substrate contacts the first metal casing with a second surface, the first surface of the microwave substrate The second surface is parallel to each other; wherein the feeding unit is configured to excite the current of the intermediate metal portion, and the slotted antenna structure couples energy to the closed slot antenna structure by the intermediate metal portion to excite the closed slot The full-wavelength resonant mode of the antenna structure. The electronic device with an antenna according to claim 1, wherein the electronic device having the antenna is a notebook computer. The electronic device with an antenna according to claim 1, wherein the frequency of the quarter-wave resonance mode of the slotted antenna structure covers a Long Term Evolution (LTE) 710 MHz band. The electronic device with an antenna according to claim 1, wherein the frequency of the full-wavelength resonant mode of the closed-cell antenna structure covers a frequency band of 960 MHz of a wide area wireless network (WWLAN). The electronic device with an antenna according to Item 1, wherein the distance between the feeding unit and the opening of the slotted antenna structure is used to adjust a quarter-wavelength resonant mode of the slotted antenna structure. Frequency of. The electronic device with an antenna according to claim 5, wherein the quarter resonance mode of the slotted antenna structure is increased when the distance between the feeding unit and the opening of the slotted antenna structure is increased The frequency of the rise. The electronic device with an antenna according to claim 5, wherein a distance between the feeding unit and the opening of the slotted antenna structure is used to adjust impedance matching of a full-wavelength resonant mode of the closed-cell antenna structure . The electronic device with an antenna according to claim 7, wherein the impedance of the full-wavelength resonant mode of the closed-cell antenna structure is increased when the distance between the feeding unit and the opening of the slotted antenna structure is increased. The closer to 50 ohms. The electronic device with an antenna according to claim 1 wherein the length of the slotted antenna structure is shorter than the length of the closed slot antenna structure. The electronic device with an antenna according to claim 1, wherein the feeding unit comprises an impedance matching unit, the impedance matching unit is in the first metal housing The orthographic projection is located at the intermediate metal portion.