Antenna device

Abstract

An antenna device is fixed in a housing of an electronic device, and comprises: a circuit carrier plate having an arc edge and a linear edge; the first radiating body is laid on the circuit carrier plate; the elastic piece is electrically connected to the first radiating body and extends upwards; the second radiating body is electrically connected to the top end of the elastic piece; the second radiating body is attached to the cover top of the shell; the first radiator is provided with a feed-in end arranged on the straight line edge, a grounding end arranged at the joint of the arc-shaped edge and the straight line edge and a radiation part connected with the feed-in end and the grounding end, and the radiation part extends to the upper surface of the circuit carrier plate. The elastic member is electrically connected with the first radiator and the second radiator, and extends in a direction perpendicular to the circuit carrier board.

Description

Technical Field

[0001] This utility model relates to an antenna, and more particularly to a small-sized antenna that can operate stably. Background Technology

[0002] In recent years, with the rapid development of mobile communications, people's requirements for mobile devices and their peripherals have become increasingly demanding. Various electronic devices are gradually becoming wireless, and lighter, thinner, smaller, and more portable electronic devices have become the mainstream in the market due to people's expectations. For the reasons mentioned above, the size of electronic devices is developing towards miniaturization, which requires the antennas installed inside them to be correspondingly reduced in size, thus increasing the demand for small antennas that can stably operate in the provided frequency bands.

[0003] Therefore, it is necessary to provide an antenna that can operate stably in a given frequency band under limited space conditions. Summary of the Invention

[0004] The purpose of this utility model is to provide an antenna device, fixed to a housing of an electronic device, comprising: a circuit board, the circuit board being arc-shaped and having an arc-shaped side and a straight side; a first radiator laid on the upper surface of the circuit board; an elastic member electrically connected to the upper surface of the first radiator and extending upward; and a second radiator electrically connected to the top of the elastic member, wherein the first radiator has a feed end disposed on the straight side, a ground end disposed at the right side intersection of the arc-shaped side and the straight side, and a radiating portion connecting the feed end and the ground end, the radiating portion extending and covering the upper surface of the circuit board, the elastic member electrically connecting the first radiator and the second radiator and extending in a direction perpendicular to the circuit board, the housing being arc-shaped and slightly larger than the circuit board to accommodate the second radiator and the circuit board, the second radiator being attached to the top of the housing and parallel to the circuit board.

[0005] In some embodiments, the radiating portion includes a first radiating segment extending to the left along the arcuate edge of the circuit board from the grounding end, a second radiating segment extending forward from the feed end and then bending to the left and extending further, a bent radiating segment extending backward in a straight line from the left end of the first radiating segment and then extending forward in a straight line after two 90-degree right-angle bends, a third radiating segment extending to the left along the arcuate edge of the circuit board from the left end of the bent radiating segment, a fourth radiating segment extending to the right from the left end of the third radiating segment, and a first connecting segment connected to the right end of the fourth radiating segment. The first radiating segment is spaced apart from the second radiating segment, the right edge of the bent radiating segment is connected to the left end of the second radiating segment, and the first connecting segment is spaced apart from the bent radiating segment.

[0006] In some embodiments, the area of ​​the first connecting segment covers and extends beyond the bottom of the elastic member.

[0007] In some embodiments, the second radiator includes a second connecting segment that contacts the top of the elastic member and is electrically connected, a first radiating strip that extends straight to the right from the right end of the second connecting segment to the side of the housing, a second radiating strip that extends to the left along the arcuate edge of the housing from the right end of the first radiating strip, and a third radiating strip that extends straight to the rear from the left end of the second radiating strip and then bends to the right and extends further. The right end of the third radiating strip is located behind the second connecting segment, and the front edge of the third radiating strip is spaced apart from the rear edge of the second connecting segment.

[0008] In some embodiments, the second connecting segment covers the top of the elastic member.

[0009] Another objective of this invention is to provide an antenna device fixed within a housing of an electronic device. The antenna device includes: a carrier plate; a first radiator disposed on the carrier plate; an elastic member electrically connected to the first radiator and extending toward the top of the housing; and a second radiator electrically connected to the top of the elastic member, the second radiator being disposed on the top of the housing. The first radiator has a feed end, a ground end disposed to the right of the feed end, a first radiating segment extending forward and to the left in an arc from the ground end, a second radiating segment extending forward from the feed end and then bending to the left, a bent radiating segment extending backward and to the left from the left end of the first radiating segment, a third radiating segment extending to the left and backward in an arc from the left end of the bent radiating segment, a fourth radiating segment extending to the right from the left end of the third radiating segment, and a first connecting segment connected to the right end of the fourth radiating segment. The left end of the first radiating segment extends beyond the left side of the feed end.

[0010] Another objective of this utility model is to provide an antenna device fixed within a housing of an electronic device. The antenna device includes: a carrier plate; a first radiator disposed on the carrier plate; an elastic member electrically connected to the first radiator and extending toward the top of the housing; and a second radiator electrically connected to the top of the elastic member, the second radiator being disposed on the top of the housing; wherein the first radiator has a feed end, a ground end disposed to the right of the feed end, and a radiating portion extending between the feed end and the ground end, the end of the radiating portion being connected to the bottom of the elastic member; wherein the second radiator has a second connecting segment connected to the top of the elastic member, a first radiating strip extending to the right from the right side of the second connecting segment, a second radiating strip extending forward and to the left in an arc shape from the right end of the first radiating strip, and a third radiating strip extending backward and then bending to the right from the left end of the second radiating strip.

[0011] As stated above, the antenna device of this invention can operate stably in the provided frequency band even under limited space conditions. Attached Figure Description

[0012] To make the above and other objects, features, advantages and embodiments of this utility model more apparent and understandable, the contents of this case can be better understood when read in conjunction with the accompanying drawings.

[0013] Figure 1 This is a perspective view of the antenna device of this utility model.

[0014] Figure 2 This is an exploded view of the antenna device of this utility model.

[0015] Figure 3 This is a partial cross-sectional view of the antenna device of this utility model within an electronic device.

[0016] Figure 4 This is a structural diagram of the first radiator of the antenna device of this utility model.

[0017] Figure 5 This is a partial bottom view of the antenna device of this utility model after the second radiator and the outer shell are combined.

[0018] Figure 6 This is a Smith diagram of the antenna device of this utility model.

[0019] Figure 7 This is a reflection loss diagram of the antenna device of this utility model. Detailed Implementation

[0020] To explain in detail the technical content, structural features, achieved objectives, and effects of the antenna device of this utility model, the following embodiments are provided in conjunction with the accompanying drawings. For ease of explanation, in this patent specification, "upper" is defined as a higher position in the direction of the drawing, "lower" is defined as a lower position in the direction of the drawing, "left" is defined as the left-hand position in the direction of the drawing, and "right" is defined as the right-hand position in the direction of the drawing.

[0021] Please see Figures 1 to 3 The antenna device 100 of this invention is mounted on a circuit board 10 of an electronic device 900. The antenna device 100 includes a first radiator 20 disposed on the upper surface of the circuit board 10, an elastic member 40 electrically connected to the upper surface of the first radiator 20 and extending upward, and a second radiator 30 electrically connected to the top end of the elastic member 40. The antenna device 100 is a planar inverted-F antenna (PIFA) and is fixed to a housing 50 of the electronic device 900. The second radiator 30 is fixed to the housing 50 of the electronic device 900.

[0022] Please see Figure 4 The circuit board 10 is configured in an arc shape and has an arc-shaped side 11 and a straight side 12. The first radiator 20 is provided with a feed end 21 disposed on the straight side, a ground end 22 disposed at the intersection of the arc-shaped side and the right side of the straight side, and a radiating part 23 connecting the feed end 21 and the ground end 22 and extending to the upper surface of the circuit board 10.

[0023] In this embodiment, the radiating section 23 includes a first radiating segment 231, a second radiating segment 232, a bent radiating segment 233, a third radiating segment 234, a fourth radiating segment 235, and a first connecting segment 236. The first radiating segment 231 extends to the left from the grounding terminal 22 along the arc-shaped edge 11 of the circuit carrier board 10. The second radiating segment 232 extends forward from the feed terminal 21, then bends to the left and extends further, with the extension path of the second radiating segment 232 forming a figure-7 shape. The second radiating segment 232 and the first radiating segment 231 are spaced apart. The bent radiating segment 233 extends backward in a straight line from the left end of the first radiating segment 231, then bends twice at 90-degree angles before extending forward in a straight line to form a roughly U-shaped shape with the opening facing forward. The right edge of the bent radiating segment 233 joins the left end of the second radiating segment 232. The third radiating segment 234 extends to the left from the left end of the bent radiating segment 233 along the arc-shaped edge of the circuit board 10, and the left edge of the third radiating segment 234 does not exceed the rear edge of the bent radiating segment 233. The fourth radiating segment 235 extends to the right from the left end of the third radiating segment 234, and the right end of the fourth radiating segment 235 connects to the first connecting segment 236, which is spaced apart from the left edge of the bent radiating segment 233.

[0024] In other words, the first radiating segment 231 extends forward and to the left in an arc shape from the grounding terminal 22, with its left end extending beyond the left side of the feed terminal 21. The second radiating segment 232 extends forward from the feed terminal 21, then bends to the left and extends further, with its extension path forming a figure-7 shape. The second radiating segment 232 and the first radiating segment 231 are spaced apart. The bent radiating segment 233 extends backward in a straight line from the left end of the first radiating segment 231, then bends twice at 90-degree angles before extending forward in a straight line to form a roughly U-shaped shape with the opening facing forward. The right edge of the bent radiating segment 233 joins the left end of the second radiating segment 232. The third radiating segment 234 extends forward and backward in an arc shape from the left end of the bent radiating segment 233, with its left edge not exceeding the rear edge of the bent radiating segment 233. The fourth radiating segment 235 extends to the right from the left end of the third radiating segment 234, and the right end of the fourth radiating segment 235 is connected to the first connecting segment 236. The first connecting segment 236 is spaced apart from the left edge of the bent radiating segment 233.

[0025] Please refer to Figure 2 and Figure 5The outer casing 50 is also designed as an arc-shaped cover, slightly larger than the circuit carrier board 10, to accommodate the second radiator 30 and the circuit carrier board 10. The second radiator 30 is attached to the top of the outer casing 50 and parallel to the circuit carrier board 10. The outer casing 50 has a side edge 51 and an arc-shaped edge 52. The second radiator 30 includes a second connecting segment 31, a first radiating strip 32, a second radiating strip 33, and a third radiating strip 34. The second connecting segment 31 contacts and is electrically connected to the top of the elastic member 40. The first radiating strip 32 extends straight to the right from the right side of the second connecting segment 31 to the side edge 51 of the outer casing 50. The second radiating strip 33 extends to the left from the right end of the first radiating strip 32 along the arc-shaped edge 52 of the outer casing 50. The third radiating strip 34 extends backward in a straight line from the left end of the second radiating strip 33, then bends to the right and extends further. The right end of the third radiating strip 34 is located behind the second connecting section 31. The front edge of the third radiating strip 34 is spaced apart from the rear edge of the second connecting section 31.

[0026] In other words, the first radiating strip 32 extends straight to the right from the right side of the second connecting segment 31. The second radiating strip 33 extends forward and to the left in an arc shape from the right end of the first radiating strip 32. The third radiating strip 34 extends straight backward from the left end of the second radiating strip 33, then bends to the right and extends further. The right end of the third radiating strip 34 is located behind the second connecting segment 31, and the front edge of the third radiating strip 34 is spaced apart from the rear edge of the second connecting segment 31.

[0027] Please see again Figures 1 to 3 The elastic element 40 is electrically connected to the first radiator 20 and the second radiator 30, and extends in a direction perpendicular to the circuit carrier 10. In this embodiment, the area of ​​the first connecting segment 236 covers and extends beyond the bottom of the elastic element 40, so that the bottom of the elastic element 40 is firmly welded to the first connecting segment 236, while the second connecting segment 31 covers the top of the elastic element 40, so that when the housing 50 is installed, the elastic element 40 correctly abuts against the second connecting segment 31 and prevents the second connecting segment 31 from deforming.

[0028] When the antenna device 100 of this utility model is used for wireless communication, the current is fed in through the feed terminal 21, flows through the radiating part 23, then through the elastic member 40, and flows to the second radiator 30, which can oscillate in a frequency band of 2.4GHz to 2.5GHz. This allows the antenna device 100 of this utility model to operate stably in the provided frequency band within a limited space.

[0029] The antenna device 100 of this invention forms the second radiator 30 by multiple bending and provides the elastic element 40, thereby reducing the installation space and making it applicable to various electronic devices.

[0030] Please see Figure 6 The figure shows the Smith chart of the antenna device 100 of this invention. When the antenna device 100 operates at 2.5 GHz, it intersects the horizontal axis of the Smith chart at point M1 in the figure, indicating that the voltage standing wave ratio (VSWR) of the antenna device 100 is small at 2.5 GHz. Therefore, the antenna device 100 of this invention can operate stably in the frequency band range of 2.4 GHz to 2.5 GHz.

[0031] Please see again Figure 7 ,like Figure 7 As shown, the antenna device 100 of this utility model operates in the frequency band of 2.4GHz to 2.5GHz, and its bandwidth reflection loss is approximately within -10dB, indicating that the antenna device 100 has low loss and high radiated energy.

[0032] In summary, the antenna device 100 of this utility model has the ability to operate stably in the provided frequency band within a limited space, adapting to the development trend of miniaturization and wirelessization of electronic products.

[0033] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An antenna device, fixed within a housing of an electronic device, wherein the antenna device is characterized in that: The device comprises: a circuit carrier board, the circuit carrier board being arc-shaped and having an arc-shaped edge and a straight edge; a first radiator laid on the upper surface of the circuit carrier board; an elastic member electrically connected to the upper surface of the first radiator and extending upward; and a second radiator electrically connected to the top of the elastic member, the second radiator being attached to the top of the housing and parallel to the circuit carrier board; wherein the first radiator has a feed end disposed on the straight edge, a ground end disposed at the right side intersection of the arc-shaped edge and the straight edge, and a radiating portion connecting the feed end and the ground end, the radiating portion extending on the upper surface of the circuit carrier board; the elastic member electrically connecting the first radiator and the second radiator and extending in a direction perpendicular to the circuit carrier board; and the housing being arc-shaped and slightly larger than the circuit carrier board to accommodate the second radiator and the circuit carrier board.

2. The antenna device as described in claim 1, characterized in that: The radiating section includes a first radiating segment extending to the left along the arc-shaped edge of the circuit board from the grounding end; a second radiating segment extending forward from the feed end and then bending to the left and extending further; a bent radiating segment extending backward in a straight line from the left end of the first radiating segment and then extending forward in a straight line after two 90-degree right-angle bends; a third radiating segment extending to the left along the arc-shaped edge of the circuit board from the left end of the bent radiating segment; a fourth radiating segment extending to the right from the left end of the third radiating segment; and a first connecting segment connected to the right end of the fourth radiating segment. The first radiating segment is spaced apart from the second radiating segment, the right edge of the bent radiating segment is connected to the left end of the second radiating segment, and the first connecting segment is spaced apart from the bent radiating segment.

3. The antenna device as described in claim 2, characterized in that: The second radiator includes a second connecting segment that contacts the top of the elastic member and is electrically connected, a first radiating strip that extends straight to the right from the right end of the second connecting segment to the side of the housing, a second radiating strip that extends to the left along the arc edge of the housing from the right end of the first radiating strip, and a third radiating strip that extends straight to the rear from the left end of the second radiating strip and then bends to the right and extends further. The right end of the third radiating strip is located behind the second connecting segment, and the front edge of the third radiating strip is spaced apart from the rear edge of the second connecting segment.

4. The antenna device as described in claim 1, characterized in that: The second radiator includes a second connecting segment that contacts the top of the elastic member and is electrically connected, a first radiating strip that extends straight to the right from the right end of the second connecting segment to the side of the housing, a second radiating strip that extends to the left along the arc edge of the housing from the right end of the first radiating strip, and a third radiating strip that extends straight to the rear from the left end of the second radiating strip and then bends to the right and extends further. The right end of the third radiating strip is located behind the second connecting segment, and the front edge of the third radiating strip is spaced apart from the rear edge of the second connecting segment.

5. The antenna device as described in claim 4, characterized in that: The second connecting segment covers the top of the elastic element.

6. An antenna device, fixed within a housing of an electronic device, wherein the antenna device is characterized in that: The device comprises: a carrier plate; a first radiator disposed on the carrier plate; an elastic member electrically connected to the first radiator and extending toward the top of the housing; and a second radiator electrically connected to the top of the elastic member, the second radiator being disposed on the top of the housing; wherein the first radiator has a feed end, a ground end disposed to the right of the feed end, a first radiating segment extending forward and to the left in an arc from the ground end, a second radiating segment extending forward from the feed end and then bending to the left and extending further, a bent radiating segment extending backward and to the left from the left end of the first radiating segment, a third radiating segment extending to the left and backward in an arc from the left end of the bent radiating segment, a fourth radiating segment extending to the right from the left end of the third radiating segment, and a first connecting segment connected to the right end of the fourth radiating segment; wherein the left end of the first radiating segment extends beyond the left side of the feed end.

7. An antenna device, fixed within a housing of an electronic device, wherein the antenna device is characterized in that: It comprises: a carrier plate; a first radiator disposed on the carrier plate; an elastic member electrically connected to the first radiator and extending toward the top of the housing; and a second radiator electrically connected to the top of the elastic member, the second radiator being disposed on the top of the housing. The first radiator has a feed end, a ground end located to the right of the feed end, and a radiating portion extending between the feed end and the ground end, the end of which is connected to the bottom of the elastic member; wherein the second radiator has a second connecting section connected to the top of the elastic member, a first radiating strip extending to the right from the right side of the second connecting section, a second radiating strip extending in an arc shape from the right end of the first radiating strip forward and to the left, and a third radiating strip extending backward from the left end of the second radiating strip and then bending to the right and extending further.

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