CN101064379B - Portable electronic device and its antenna - Google Patents

Abstract

An antenna includes a substrate, a grounding component and a transmission component. The grounding component is disposed on a first surface of the substrate and is formed with a slot, and the transmission component is disposed on a second surface of the substrate and is electrically connected to the grounding component, wherein the projection of the transmission component on the first surface substantially overlaps with the slot portion.

Description

Portable electronic device and its antenna

technical field

The present invention relates to an antenna, in particular to a broadband antenna.

Background technique

With the vigorous development of wireless communication and the trend of miniaturization of mobile communication products, the location and space of antennas are compressed, which relatively causes difficulties in design, and some embedded miniature antennas have emerged as the times require. Generally speaking, the micro-antennas commonly used at present include chip antennas (chipantenna) and planar antennas (planar antennas), etc. These types of antennas all have the characteristics of small size. (LTCC) made of ceramic chip antenna (ceramic chip antenna), and there are many planar antenna designs, such as microstrip antenna (microstripantenna), printed antenna (printed antenna) and planar inverted F antenna (Planar Inverted FAntenna, PIFA) ) and so on, these antennas are widely used in wireless terminal equipment such as GSM, DCS, UMTS, WLAN and Bluetooth, such as mobile phones, wireless local area networks and so on. Although the above-mentioned antenna achieves the purpose of miniaturization, the problem of insufficient bandwidth is derived. In the case of insufficient bandwidth, when the body is close to the antenna, the frequency deviation of the antenna will occur, thereby deteriorating the characteristics of the antenna, and even disable the antenna.

In order to be able to receive multiple frequency bands, a plurality of antennas of different frequency bands are generally installed in the portable electronic device. However, as the volume of the portable electronic device becomes smaller and smaller, and other Electronic components limit the position and space where the antenna can be placed, thus increasing the difficulty in design. On the other hand, when configuring the antenna, it is also necessary to consider that the shielding effect of the user's body may cause frequency deviation of the antenna, thereby affecting the radiation performance of the antenna.

Therefore, how to design an antenna structure in a portable electronic device that increases the bandwidth of the antenna, reduces the body shielding effect, does not affect the radiation performance of the antenna, and can save or effectively use space has become an important issue.

Contents of the invention

In order to solve the problems of the conventional technology, the present invention provides an antenna, which includes a substrate, a grounding component and a transmission component. The ground component is disposed on a first surface of the substrate and forms a slot, and the transmission component is disposed on a second surface of the substrate and is electrically connected to the ground component, wherein, the projection of the transmission component on the first surface is substantially the same as the above-mentioned Grooves partially overlap.

The present invention also provides a portable electronic device, which includes a housing and an antenna. The antenna is arranged in the housing and includes a substrate, a grounding component and a transmission component. The ground component is disposed on a first surface of the substrate and forms a slot, and the transmission component is disposed on a second surface of the substrate and is electrically connected to the ground component, wherein, the projection of the transmission component on the first surface is substantially the same as the above-mentioned Grooves partially overlap.

Description of drawings

FIG. 1 shows a situation where the antenna of the present invention is installed in an electronic device.

FIG. 2 is an exploded schematic view showing the antenna of the present invention.

Fig. 3 is a schematic plan view showing the antenna of the present invention.

FIG. 4 is a schematic diagram showing the voltage standing wave ratio (VSWR) exhibited by the antenna of the present invention in the frequency range of 2-3 GHz.

FIG. 5 shows a modification example of the ground portion of the antenna of the present invention.

FIG. 6 shows another variation example of the ground portion of the antenna of the present invention.

FIG. 7 shows yet another variation example of the ground portion of the antenna of the present invention.

FIG. 8 is a diagram showing a modification of the antenna interconnection portion of the present invention.

FIG. 9 shows another variation of the antenna interconnection portion of the present invention.

FIG. 10 shows yet another variation of the antenna interconnection portion of the present invention.

Fig. 11 shows a modification example of the antenna feeding part of the present invention.

Fig. 12 shows another modification example of the antenna feeding part of the present invention.

Fig. 13 shows a modification example of the antenna extension part of the present invention,

Fig. 14 shows another modification example of the antenna of the present invention.

Fig. 15 is a diagram showing a variation of the antenna ground assembly of the present invention.

FIG. 16 shows another variation of the antenna ground assembly of the present invention.

Fig. 17 shows yet another variation of the antenna ground assembly of the present invention.

18 is a schematic diagram showing the input return loss (Input Return Loss) presented by the antenna of the present invention in the frequency range of 2-3 GHz.

Explanation of main component symbols

1 Antenna 11 Substrate

111 Through hole 112 Hole

接地组件12 12'12"12

Grounding components

113 121 121' side

123 Perforation 124 Zigzag structure

125 Fragmented profile 13 Transmission components

接地部131 131'131"131

Ground

互连部132 132'132"132

Interconnect

133 133’133”feed-in part

133a First Section 133b Second Section

134 134’ Extension 15 Cable

2 Antenna 3 Electronic Devices

31 Housing 32 Display unit

C Slotted C1 Side 1

C2 Second side C3 Third side

D Deformation part G G Distance

S1 The first side S2 The second side

U U-shaped bending structure θ1 angle

θ2 angle

Detailed ways

Please refer to Fig. 1, antenna 1 of the present invention is arranged in the housing 31 of a portable electronic device (mobile phone) 3, and housing 31 comprises a display unit 32, and antenna 1 promptly is arranged on the side of display unit 32 , In addition, another antenna 2 is provided in the housing, located on the upper side of the display unit 32 . In the above, the antenna 1 is a WiFi antenna, and the antenna 2 is used for receiving satellite signals.

Referring to FIG. 2 again, the antenna 1 of the present invention is illustrated. The antenna 1 of the present invention mainly includes a substrate 11 , a grounding component 12 , a transmission component 13 and a cable 15 . The grounding component 12 is disposed on a first surface S1 of the substrate 11, and has a generally rectangular slot C, the opening of the slot C faces the side 121 of the grounding component 12, and the slot C has a first side C1, a second side C2 and a third side C3, the second side C2 is connected to and perpendicular to the first side C1 and the third side C3. The transmission component 13 is disposed on a second surface S2 of the substrate 11 and is electrically connected to the ground component 12 . The cable 15 is connected to the transmission component 13 through the second surface S2, so as to transmit wireless signals. When the transmission component 13 is projected on the first surface S1 , the projection of the transmission component 13 on the first surface S1 generally corresponds to the slot C and partially overlaps the slot C.

The transmission component 13 includes a grounding part 131, an interconnection part 132, a feed-in part 133 and an extension part 134. The grounding part 131 is connected to the grounding component 12, the feed-in part 133 is connected to the cable 15, and the interconnection part 132 Then connect the ground part 131 , the feeding part 133 and the extension part 134 . There is an included angle θ1 between the interconnection portion 132 and the feeding portion 133 , and the included angle θ1 is between 0° and 180°.

Next, please refer to FIG. 2 and FIG. 3 , as shown in the figure, the position of the ground portion 131 roughly corresponds to the position of the first side C1 of the slot C, and the position of the interconnection portion 132 roughly corresponds to the opening of the slot C. The position of the feeding part 133 spans the second side C2 of the slot C, and the position of the extension part 134 roughly corresponds to the position of the third side C3 of the slot C. In more detail, the ground portion 131 is parallel to the first side C1 of the slot C, and the projection of the ground portion 131 on the first plane S1 is exactly located on the first side C1 of the slot C, and the interconnection portion 132 is parallel to and adjacent to The side 121 of the ground plate 12 is grounded, and the extension portion 134 is parallel to the third side C3 of the slot C, and the projection of the extension portion 134 on the first plane S1 is adjacent to the third side C3 of the slot C. The ground portion 131 , the interconnection portion 132 , the feeding portion 133 and the extension portion 134 of the above-mentioned transmission component 13 are generally arranged in an E-shape corresponding to the slot C. As shown in FIG.

In this embodiment, the distance G between the first side C1 of the slot C and one side 113 of the substrate is at least 1 mm. In addition, the second side C2 of the slot C is parallel to the side 121' of the grounding component 12, and the length of the side 121' is about five times the length of the second side C2. Moreover, the length of the ground portion 131 is substantially equal to the length of the first side C1, that is, the position where the ground portion 131 of the transmission component 13 is electrically connected to the ground component 12 is exactly located at a corner of the slot C. Meanwhile, the angle θ1 between the interconnection portion 132 and the feeding portion 133 is 90 degrees.

In addition, for wiring reasons, the substrate 11 may also be provided with a through hole 111 and a hole 112, the ground portion 131 of the transmission component 13 is connected to the ground component 12 on the first surface S1 of the substrate 11 through the through hole 111, and The cable is connected to the feed-in portion 133 of the transmission component 13 through the hole 112 from the first surface S1 of the substrate 11 .

Since the antenna 1 of the present invention uses the ground component 12 as the radiator of the antenna, the overall volume can be greatly reduced. In addition, when the antenna 1 is arranged in the electronic device 3, the metal shell of the electronic device 3 adjacent to the antenna 1 The body 31 or other metal components in the electronic device 3 can cooperate with the antenna 1 as the radiator of the antenna 1. Therefore, the antenna 1 of the present invention can be regarded as a multi-radiator antenna, thereby increasing the frequency of the antenna 1. Width. Please refer to FIG. 4 , the bandwidth of which the voltage standing wave ratio (VSWR) is less than 2 is about 700-800 MHz, that is to say, the antenna 1 of the present invention is not easy to cause the frequency deviation of the antenna 1 to fail due to the body shielding effect.

Based on the antenna 1 shown in FIGS. 2 and 3 , several variations of the antenna 1 of the present invention will be described below, and the same parts will not be repeated. It should be noted that the following variations can be used alternately so that the antenna 1 of the present invention has an optimal signal transmission effect.

Please refer to FIG. 5 , which shows a variation example of the ground portion 131' of the antenna 1 of the present invention. Wherein, the ground portion 131 ′ is parallel to the first side C1 of the slot C, and the projection of the ground portion 131 ′ on the first surface S1 is adjacent to the first side C1 of the slot C. More specifically, the ground portion 131 ′ is The projection of the first surface S1 is located above the first side C1 of the slot C, and there is a distance between the two.

Referring to FIG. 6 again, it shows another variation example of the ground portion 131 "of the antenna 1 of the present invention. Wherein, the ground portion 131 "is parallel to the first side C1 of the slot C, and the ground portion 131 "is on the side of the first surface S1 The projection is adjacent to the first side C1 of the slot C, more specifically, the projection of the ground portion 131 ″ on the first surface S1 is located below the first side C1 of the slot C, and there is a distance between the two.

平行于开槽C的第一侧C1，且接地部131

在第一面S1的投影正好位于开槽C的第一侧C1上，而接地部131”的长度小于第一侧C1的长度。然而，于另一变化例中，接地部131的长度大于第一侧C1的长度亦是可行的。Referring to Fig. 7 again, it shows the ground portion 131 of the antenna 1 of the present invention Another variation of . Among them, the ground part 131

Parallel to the first side C1 of the slot C, and the ground portion 131

The projection on the first surface S1 is just located on the first side C1 of the slot C, and the length of the land portion 131 ″ is shorter than the length of the first side C1. However, in another variation, the length of the land portion 131 is longer than the length of the first side C1. The length of one side C1 is also feasible.

Please refer to FIG. 8 , which shows a modification example of the interconnection portion 132' of the antenna 1 of the present invention. Wherein, the interconnection part 132' corresponds to the opening of the slot C and is parallel to the side 121 of the ground plate 12. More specifically, the interconnection part 132' is located on the left side of the side 121 with a gap between them.

Referring to Fig. 9 again, it shows another modification example of the interconnection portion 132 "of the antenna 1 of the present invention. Wherein, the interconnection portion 132 " corresponds to the opening of the slot C and is substantially parallel to the side edge 121 of the ground plate 12 , the interconnection portion 132 ″ includes a deformation portion D, and the deformation portion D has a different shape from the interconnection portion 132 ″. For example, as shown in FIG. 9 , the width of the deformation portion D on the first axis (X axis) is greater than the width of the interconnection portion 132 ″ on the first axis (X axis).

的又一个变化例。其中，互连部132对应于开槽C的开口且大体上平行于接地板12的侧边121，互连部132包括一U型弯折结构U，与延伸部134相连接。Referring to Fig. 10 again, it shows the interconnection portion 132 of the antenna 1 of the present invention

Another variation of . Among them, the interconnect 132 Corresponding to the opening of the slot C and substantially parallel to the side 121 of the ground plate 12, the interconnection portion 132 It includes a U-shaped bent structure U connected to the extension part 134 .

Please refer to FIG. 11 , which shows a modification example of the feeding part 133' of the antenna 1 of the present invention. Wherein, the feed-in portion 133' straddles the second side C2 of the slot C, and the angle θ1 between the interconnection portion 132 and the feed-in portion 133' is less than 90 degrees.

Referring to Fig. 12 again, it shows another variation example of the feed-in portion 133 "of the antenna 1 of the present invention. Wherein, the feed-in portion 133 " comprises a first section 133a and a second section 133b, and the first section 133a is connected to each other. The connecting portion 132 is connected, and the second section 133b is connected to the cable 15. There is an angle θ2 between the first section 133a and the second section 133b, and the angle θ2 is between 0° and 180°. For example, as shown in FIG. 12, the angle θ2 is greater than 90 degrees.

Please refer to FIG. 13 , which shows a modification example of the extension portion 134' of the antenna 1 of the present invention. Wherein, the extension 134' is parallel to the third side C3 of the slot C, and the projection of the extension 134' on the first surface S1 is adjacent to the third side C3 of the slot C. More specifically, the extension 134' is at The projection of the first surface S1 is located above the third side C3 of the slot C, with a distance between them.

Referring to FIG. 14 , in this embodiment, the transmission component 13 includes a grounding part 131 , an interconnection part 132 and a feed-in part 133 , without an extension part 134 , or the extension part 134 can be regarded as being parallel to the interconnection part 132 , And connect into one. In addition, the ground portion 131 , the interconnection portion 132 and the feeding portion 133 of the transmission component 13 are generally arranged in an F shape corresponding to the slot C. As shown in FIG.

Please refer to FIG. 15 , which shows a modification example of the ground component 12' of the antenna 1 of the present invention. Wherein, the appearance of the grounding component 12' is generally rectangular and has a slot C, and the grounding component 12' also has at least one through hole 123, which runs through the two sides of the grounding component 12'. Or, for example, as shown in FIG. 15 , the ground component 12' has a plurality of through holes 123 arranged substantially in a matrix.

Referring to Fig. 16 again, it shows another variation example of the ground component 12 "of the antenna 1 of the present invention. Wherein, the external shape of the ground component 12 " is generally rectangular and has a slot C, and the ground component 12 " also has a zigzag shape structure124.

的另一个变化例。其中，接地组件12

具有开槽C及一碎型轮廓125，此碎型轮廓125可以为对称或不对称。Referring to Fig. 17 again, it shows the ground assembly 12 of the antenna 1 of the present invention

Another variation of . Among them, the ground assembly 12

It has slots C and a fractal profile 125 which can be symmetrical or asymmetrical.

In addition, it should be noted that the operating frequency of the antenna of the present invention is between 2.4GHz and 2.5GHz. When the human body is close to the antenna of the present invention, please refer to Figure 18, and the input return loss (Input ReturnLoss) is lower than -10dB The frequency range is between 2.1 GHz and 2.53 GHz, so the antenna of the present invention can ensure an effective transmission signal bandwidth between 2.4 GHz and 2.5 GHz.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the present invention shall fall within the scope of the present invention.

Claims (29)

1. An antenna, comprising: A substrate, the substrate has a through hole; a grounding component disposed on a first surface of the substrate and forming a slot; and A transmission component is disposed on a second surface of the substrate and is electrically connected to the ground component through the through hole, wherein the projection of the transmission component on the first surface substantially overlaps with the groove. 2. The antenna according to claim 1, wherein an opening of the slot faces one side of the ground component. 3. The antenna according to claim 1, further comprising a cable electrically connected to the transmission component through the second surface, so as to transmit a wireless signal. 4. The antenna according to claim 3, wherein the substrate has a hole, and the cable is electrically connected to the transmission component through the hole from the first surface. 5. The antenna according to claim 1, wherein the ground component comprises at least one through hole passing through the ground component. 6. An antenna comprising a substrate; A grounding component is disposed on a first surface of the substrate and forms a slot, the grounding component has a zigzag structure; and A transmission component is arranged on a second surface of the substrate and is electrically connected to the ground component, wherein the projection of the transmission component on the first surface substantially overlaps with the groove. 7. An antenna comprising a substrate; a ground component disposed on a first surface of the substrate and forming a slot, the ground component having a fractal profile; and A transmission component is arranged on a second surface of the substrate and is electrically connected to the ground component, wherein the projection of the transmission component on the first surface substantially overlaps with the groove. 8. An antenna comprising A substrate, the substrate has a through hole; A grounding component is disposed on a first surface of the substrate and forms a slot, the slot has a first side, the first side is substantially parallel to one side of the substrate and has a distance of at least 1mm; and A transmission component is disposed on a second surface of the substrate and is electrically connected to the ground component through the through hole, wherein the projection of the transmission component on the first surface substantially overlaps with the groove. 9. The antenna according to claim 8, wherein the slot also has a second side perpendicular to the first side, the second side is parallel to the other side of the substrate, and the other side of the substrate is The length is about five times the length of the second side. 10. An antenna comprising a substrate; A ground component is disposed on a first surface of the substrate and forms a slot, the slot is generally rectangular in shape and has a first side; and a transmission component, disposed on a second surface of the substrate and electrically connected to the ground component, the transmission component includes a ground portion, the position of the ground portion roughly corresponds to the position of the first side of the slot, and One end of the grounding portion is connected to the grounding component, wherein the projection of the transmission component on the first surface is substantially overlapped with the slotted portion. 11. The antenna according to claim 10, wherein the ground portion is parallel to the first side of the slot. 12. The antenna according to claim 11, wherein a length of the ground portion is substantially equal to a length of the first side of the slot. 13. The antenna according to claim 11, wherein a length of the ground portion is greater than a length of the first side of the slot. 14. The antenna according to claim 10, wherein a projection of the ground portion on the first surface is located on the first side of the slot. 15. The antenna according to claim 10, wherein a projection of the ground portion on the first surface is adjacent to the first side of the slot. 16. The antenna according to claim 10, wherein the transmission component further comprises an interconnection part connected to the ground part, the position of the interconnection part substantially corresponding to the position of the opening of the slot. 17. The antenna according to claim 16, wherein an opening of the slot faces a side of the ground component, and the interconnection portion is substantially parallel to and adjacent to the side of the ground component. 18. The antenna according to claim 16, wherein the interconnection portion comprises a deformation portion, the width of the deformation portion on a first axis is different from the width of the interconnection portion on the first axis. 19. The antenna according to claim 16, wherein the interconnection part comprises a U-shaped bending structure. the 20. The antenna according to claim 16, wherein the slot further has a second side perpendicular to the first side, and the transmission element further comprises a feeding portion connected to the interconnection portion and spanning the second side , there is an included angle between the feed-in portion and the interconnection portion, and the included angle is between 0° and 180°. 21. The antenna according to claim 20, wherein the feeding part comprises a first segment and a second segment, the first segment is connected to the interconnection part, the second segment is connected to a cable Sexual connection, so as to transmit a wireless signal, an angle is formed between the first section and the second section, and the angle is between 0 degrees and 180 degrees. 22. The antenna according to claim 20, wherein the ground portion, the interconnection portion and the feeding portion of the transmission element are substantially arranged in an F-shape. 23. The antenna according to claim 20, wherein the slot further has a third side parallel to the first side, the transmission component further comprises an extension connected to the interconnection, the extension is located at roughly corresponding to the position of the third side of the slot. 24. The antenna according to claim 23, wherein the extending portion is parallel to the third side of the slot. 25. The antenna according to claim 23, wherein a projection of the extension portion on the first surface is adjacent to the third side of the slot. 26. The antenna according to claim 23, wherein the ground portion, the interconnection portion, the feed-in portion and the extension portion of the transmission element are substantially arranged in an E-shape. 27. A portable electronic device comprising: a shell; and An antenna is arranged in the casing, and the antenna includes: a substrate, the substrate has a through hole; a grounding component disposed on a first surface of the substrate and forming a slot; and A transmission component is arranged on a second surface of the substrate and is electrically connected to the ground component through the through hole, wherein the projection of the transmission component on the first surface substantially overlaps with the groove. 28. The portable electronic device according to claim 27, further comprising a display unit disposed on the casing, and the antenna is disposed on one side of the display unit. 29. The portable electronic device according to claim 27, wherein the portable electronic device is a mobile phone. the

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