CN105826662A - Antenna structure with cable grounding area - Google Patents

Abstract

An antenna includes a feeding terminal, a radiation portion, a connection conductor and a grounding portion. The radiation part extends from the feed end along a first direction to form a first hook part; the connecting conductor extends from the feed end to a short-circuit end along a second direction, wherein the second direction is opposite to the first direction; the grounding part is provided with a cable grounding area and extends from the short circuit end to pass through the cable grounding area, wherein the grounding part and the connecting conductor form a second hook part; the cable grounding area has a longitudinal reference center line; the first direction and the longitudinal reference center line have a specific angle therebetween; and the specific angle is between 49 degrees and 59 degrees.

Description

Antenna structure with cable ground area

technical field

The present invention relates to an antenna, and more particularly to an antenna having a cable ground area.

Background technique

In today's era of rapid technological development, various sizes of lightweight antennas have been developed to be used in various sizes of increasingly lightweight handheld electronic devices (such as mobile phones or notebook computers) or wireless transmission devices ( For example in an access point (AP). For example, the Inverse-F Antenna (IFA), which has a light structure, good transmission performance, and can be easily installed on the inner wall of a handheld electronic device, already exists and is widely used in a variety of handheld electronic devices. wireless transmission or laptop or wireless communication device.

Antennas currently used in handheld electronic devices are usually fabricated on the edge of a system circuit substrate of the electronic device, and the ground of the antenna is connected to a ground metal provided by the system circuit substrate. Therefore, the antenna is limited by the position of the circuit board placed in the electronic device, so that the antenna's transmission performance, such as field type, efficiency, operating bandwidth and even operating frequency band, will deteriorate due to interference from nearby objects; the grounding metal will also Increase the size of the electronic device. In order to meet the increasingly compact size of handheld electronic devices, the size of the antenna itself must be further reduced, but the transmission performance of the antenna may be sacrificed.

Contents of the invention

The present invention is an easily adjustable printed single-frequency inverted-F-shaped antenna design used on a printed circuit board. The built-in printed single-frequency inverted-F-shaped antenna of the present invention is suitable for wireless transmission device products. The present invention can be easily adjusted and corrected according to the requirement of the product, so as to achieve a suitable application. The embodiments cited can be applied to operating frequency bands in LTEBand3 (1710-1880MHz) or DECTBand (1880-1890MHz) or LTEBand1 (1920-2170MHz) or LTEBand40 (2300-2400MHz) or WiFi-2G (2400-2500MHz) or LTEBand7 ( 2500 ~ 2690MHz) at least one of the system frequency band requirements, for example, can be used in wireless communication devices, such as notebook computers or mobile phones or access points, etc., can be slightly adjusted in the frequency band, and applied to wireless communication in other operating frequency bands System device antenna application.

The purpose of the present invention is to propose a small and wall-mounted printed antenna with independent single-frequency antenna. The printed antenna is a circuit board with a planar structure. It does not require molds to save mold and assembly costs, and avoid The deformation problem of the three-dimensional antenna structure can be separately arranged in the electronic device in a hanging manner. The antenna is configured independently so that the antenna does not have to be fabricated on the edge of the system circuit substrate of the electronic device, and is welded on the substrate of the antenna by a 50Ω cable, and the length of the cable is properly configured to connect the substrate of the antenna to the circuit substrate of the system Radio signal module. In addition to adjusting any appropriate position of the antenna in the electronic device according to the application requirements, in order to prevent the antenna from being interfered by nearby objects and affecting its transmission performance, since the antenna does not require an additional ground conductor, the antenna can be reduced. its own size.

In order to further reduce the size of the antenna, the antenna is configured with a cable grounding area, and the center line of the cable grounding area and the upper edge of the substrate have a specific angle and are located on the right side of the antenna grounding portion. The antenna extends from the feed-in end, passes through a connecting conductor and two 90-degree corners along the counterclockwise direction, and reaches the grounding area of the cable.

Another object of the present invention is to propose an antenna that can adjust the operating frequency band according to the application requirements and a method for adjusting the operating frequency band and impedance of the antenna. The antenna can be easily adjusted to achieve a suitable operating frequency, and one of the antennas can be adjusted Impedance enables this antenna to achieve optimum signal transmission efficiency.

After the radiating part of the antenna extends a rectangular first radiating conductor from the feeding end, a second radiating conductor is formed through a 90-degree clockwise corner, and then a 90-degree clockwise corner is formed to form a The third radiation conductor, the total length of the length of the first radiation conductor plus the length of the second radiation conductor and the length of the third radiation conductor is about 1/4 of the operating wavelength of the antenna. Therefore, adjusting at least one of the length of the first radiation conductor, the length of the second radiation conductor and the length of the third radiation conductor can easily adjust the operating frequency of the antenna.

The grounding portion of the substrate is configured with a cable grounding area, and the direction of the longitudinal centerline of the antenna cable grounding area has a specific angle with the direction of the upper edge of the substrate.

Since the size of the antenna is much smaller than that of the general antenna, about 28mm×8.2mm, in order to make the antenna start from the feed-in end, go through a first grounding branch through a counterclockwise corner, and reach the grounding area of the cable. For the path distance to be approximately 1/4 of the operating wavelength of the antenna, and to meet the transmission performance requirements of the antenna, the specific angle must be set in the range of 49 degrees to 59 degrees.

The central conductor of a 50Ω cable is welded to the feed-in terminal on the substrate, so that the antenna feed-in terminal is electrically connected to the signal of the RF signal module, and the shielded conductor of the 50Ω cable is welded to the grounding area of the antenna cable, So that the ground portion of the antenna is electrically connected to the ground of the RF signal module.

In addition, a main ground portion of the ground portion extends a second ground branch portion toward the third radiation conductor along the direction of the lower edge of the substrate, so that the second ground branch is parallel to and adjacent to the third radiation conductor. There is a capacitive coupling between the second grounding branch and the third radiating conductor, and the size of the capacitive coupling is determined by the space surrounded by the main grounding part, the second grounding branch and the third radiating conductor Size to determine the impedance matching of the antenna.

The size of the gap can be changed by at least one of the methods of adjusting the vertical distance between the ground main part and the third radiating conductor and adjusting the vertical distance between the second ground branch part and the third radiating conductor, so as to adjust The antenna is impedance matched.

An embodiment of the present invention provides an antenna, which includes a feeding end, a radiation portion, a connecting conductor, and a grounding portion. The radiating portion extends from the feed-in end along a first direction to form a first hook; the connecting conductor extends from the feed-in end along a second direction to a short-circuit end, wherein the second direction is opposite to the first a direction; the grounding part has a cable grounding area, and extends from the short-circuit end through the cable grounding area, wherein the grounding part and the connecting conductor form a second hook; the cable grounding area has a longitudinal reference centerline; There is a specific angle between the first direction and the longitudinal reference centerline; and the specific angle is between 49 degrees and 59 degrees.

Another embodiment of the present invention is to provide an antenna, the antenna includes a radiation part and a cable grounding area, the radiation part extends along a first direction; the cable grounding area extends along a second direction, wherein the first There is a specific angle between the direction and the second direction, and the specific angle is between 49 degrees and 59 degrees.

An embodiment of the present invention provides an antenna, which includes a feeding end, a radiation portion and a grounding portion. The radiation part extends from the feeding end along a first direction; the ground part has a cable grounding area, and the cable grounding area extends from a second direction, wherein there is a gap between the first direction and the second direction A specific angle, and the specific angle is between 49 degrees and 59 degrees.

Description of drawings

1A-1E are schematic front views of an antenna in various embodiments of the present invention, respectively.

FIG. 2 is a coordinate diagram of return loss-frequency band of the antenna in one embodiment of the present invention.

detailed description

Please refer to FIG. 1A to FIG. 1E , which are schematic front views of an antenna 10 in various embodiments of the present invention. As shown in FIG. 1A , the antenna 10 includes a substrate 101 , an antenna conductor body 11 fabricated on the substrate 101 , and a cable 04 . The antenna conductor main body 11 is connected with a cable 04 having a resistance of 50Ω at a specific angle. 1B to 1E are structural views of the antenna conductor body 11 fabricated on the substrate 101 . In one embodiment, the surface of the antenna conductor body 11 is coated with an insulating film except for the feed-in terminal 02 and the cable grounding area 03 for the purpose of insulating and preventing oxidation of the antenna conductor body 11 .

In one embodiment, the antenna 10 is a printed wall-mounted independent single-frequency antenna, the antenna body conductor 11 is made on the plane of the substrate 101, and the substrate 101 can be placed in the electronic device in a suspended manner (not shown) )any position. The independent configuration of the antenna 10 makes the antenna 10 unnecessary to be fabricated on the edge of the system circuit of the electronic device (not shown), by soldering a 50Ω cable 04 on the antenna conductor body 11, and properly disposing the 50Ω The length of the cable 04 is to connect the antenna 10 to the RF signal module (not shown) on the system circuit board. In addition to installing the antenna 10 at any appropriate position in different electronic devices according to different application requirements, in order to prevent the antenna 10 from being interfered by nearby objects and affecting its transmission performance, since the antenna 10 does not require system circuits to provide The extra ground conductor can further reduce the size of the substrate 101 of the antenna 10 .

In one embodiment, an antenna 10 includes a feeding end 02 , a radiation portion 06 , a connecting conductor 21 and a grounding portion 05 . The radiation portion 06 extends from the feeding end 02 along a first direction 601D to form a first hook portion 61 . The connecting conductor 21 extends from the feed-in end 02 to a short-circuit end 21T along a second direction 21D, wherein the second direction 21D is opposite to the first direction 601D. The grounding portion 05 has a cable grounding area 03 and extends from the short-circuit end 21T through the cable grounding area 03 , and the grounding portion 05 and the connecting conductor 21 form a second hook portion 51 . The cable ground area 03 has a longitudinal reference centerline 40 . There is a specific angle θ between the first direction 601D and the longitudinal reference centerline 40 , and the specific angle θ is between 49 degrees and 59 degrees.

In one embodiment, the first direction 601D and the second direction 21D are a first initial extending direction and a second initial extending direction, respectively. Preferably, the specific angle θ is between 52 degrees and 56 degrees. More preferably, the specific angle θ is between 53 degrees and 55 degrees.

In one embodiment, the antenna 10 further includes a substrate 101 . The substrate 101 includes a first surface 101S and has a first width 101W, wherein the first surface 101S is rectangular, and has a first corner region 101LUC, a second corner region 101RUC, a third corner region 101RLC and a 4th corner area 101LLC. The antenna conductor body 11 includes a feed-in terminal 02 , a connecting conductor 21 , a ground portion 05 and a radiation portion 06 . The ground portion 05 is disposed on the first surface 101S, and includes a ground main portion 501 , a first ground branch portion 502 and a second ground branch portion 503 . The ground main portion 501 is disposed on the fourth corner region 101LLC, has a rectangular shape, and includes a first edge 501UPS, a second edge 501RTS adjacent to the first edge 501UPS, and a second edge 501UPS opposite to the first edge 501UPS. A third edge 501LWS, and a fourth edge 501LFS opposite to the second edge 501RTS.

The first ground stub 502 extends from the first edge 501UPS, is disposed on the first corner region 101LUC, and is a rectangular conductor with a second width 503L. The second ground branch 503 extends from the second edge 501RTS toward the third corner region 101RLC, and has a first inner edge 503UPS, a first outer edge 503LWS opposite to the first inner edge 503UPS, a second A rectangular conductor of length 503L and a third width 503W. The radiation part 06 is disposed on the first surface 101S, and includes a first radiation conductor 601 , a second radiation conductor 602 and a third radiation conductor.

The first radiation conductor 601 extends from the feeding end 02 and has a second inner edge 601LWS, a second outer edge 601UPS opposite to the second inner edge 601LWS, a first length 601L and a fourth width 601W . The second radiation conductor 602 extends from the first radiation conductor 601 and has a third outer edge 602RTS and a fifth width 602W; the third radiation conductor 603 extends from the second radiation conductor 602 and has a A third inner edge 603LFS, a fourth outer edge 603RTS, a fifth outer edge 603LWS, a third length 603L and a sixth width 603W. The second width 502W is 2/5 of the first width 101W; the third width 503W, fourth width 601W, fifth width 602W, and sixth width 603W are respectively 1/5 of the first width 101W; The first length 601L is greater than the second length 503L and the third length 603L; the second length 503L is greater than the third length 603L. There is a gap 07 between the radiating part 06 , the connecting conductor 21 and the grounding part 05 ; and the third radiating conductor 603 points to the cable grounding area 03 .

In one embodiment, a total length of the first length 601L plus the fourth width 601W and the third length 603L determines an operating frequency band of the antenna 10 , and the operating frequency band is 2.4GHz˜2.5GHz. Counting from the feed-in end 02 , passing through the connecting conductor 21 and the first grounding branch 502 to the cable grounding area 03 is equal to the total length, and the total length is equal to 1/4 of the operating wavelength of the antenna.

In one embodiment, the fourth edge 501LFS coincides with the left edge 101LFS of the substrate 101 , and the third edge 501LWS coincides with the lower edge 101LWS of the substrate 101 . The left edge 502LFS of the first ground branch 502 coincides with the left edge 101LFS of the substrate 101 , and the upper edge 502UPS of the first ground branch 502 coincides with the upper edge 101UPS of the substrate 101 . A first outer edge 503LWS of the second grounding branch 503 coincides with the lower edge 101LWS of the substrate 101 , and the first inner edge 503UPS is parallel to and adjacent to the fifth outer edge 603LWS of the third radiation conductor 603 . The second outer edge of the first radiation conductor 601 coincides with the upper edge 101UPS of the substrate 101 ; the third outer edge 602RTS of the second radiation conductor 602 coincides with the right edge 101RTS of the substrate 101 .

In one embodiment, there is a specific distance 07W between the fifth outer edge 603LWS of the third radiating conductor 603 and the third inner edge 603LFS of the second ground branch 503, and the specific distance 07W makes the antenna have a predetermined impedance matching.

In one embodiment, the antenna 10 further includes a coaxial cable 04 . The coaxial cable 03 also includes a central conductor 401 and a shield conductor 402 surrounding the central conductor 401 . The cable grounding area 03 further has a first end 03UT and a second end 03LT opposite to the first end 03UT. The longitudinal reference centerline 40 passes through the feeding end 02 , the first end 03UT and the second end 03LT. The central conductor end 401 and the shielding conductor end 402 are electrically connected to the feed-in end 02 and the cable grounding area 03 respectively.

In various embodiments according to FIGS. 1A to 1E , an antenna 10 includes a radiating portion 06 and a cable grounding area 03 . The radiation portion 06 extends along a first direction 601D. The cable grounding area 03 extends along a third direction 40D longitudinally referring to the centerline, wherein there is a specific angle θ between the first direction 601D and the third direction 40D, and the specific angle θ is between 49 degrees to 59 degrees Spend.

In one embodiment, the radiation portion 06 extends along the first direction 601D to form a first radiation conductor 601 . The first radiating conductor 601 extends through a first corner TP1 of 90 degrees clockwise to form a second radiating conductor 602 . The second radiating conductor 602 extends through a second corner TP2 of 90 degrees clockwise to form a third radiating conductor 603 .

In various embodiments according to FIG. 1A to FIG. 1E , an antenna 10 includes a feeding end 02 , a radiating portion 06 and a grounding portion 05 . The radiation part 06 extends from the feeding end 02 along a first direction 601D. The ground portion 05 has a cable ground area 03 , and the cable ground area extends from a third direction 21D. There is a specific angle θ between the first direction 601D and the second direction 21D, and the specific angle θ is between 49 degrees and 59 degrees.

In one embodiment, the average length from the feeding end 02 through the grounding portion 05 to the center of the cable grounding area 03 is a specific value, and the specific value is 1/4 of the operating wavelength. The surface of the antenna 10 is covered with an insulating film except the feeding end 02 and the cable grounding area 03 . The exposed feeding end 02 and the cable grounding area 03 are electrically connected to a cable 04 without covering the insulating film, so that the cable grounding area 03 is welded to a shielded conductor 402 of the cable 04, and the feeding end 02 is welded To the central conductor 401 of the cable 04.

In one embodiment, the connection conductor 21 extends along the second direction 21D to form a first ground branch 502 . The ground branch portion 502 extends through a third corner TP3 of 90 degrees counterclockwise to form a ground main portion 501 . The grounding main portion 501 extends through a fourth corner TP4 of 90 degrees counterclockwise to reach a cable grounding area 03 .

In one embodiment, by adjusting at least one of the first length 601L, the fourth width 601W, and the third length 603L, one of the operating frequency bands of the antenna can be LTEBand3 (1710-1880MHz) or DECTBand (1880MHz) ~1890MHz) or one of LTEBand1 (1920~2170MHz) or LTEBand40 (2300~2400MHz) or LTEBand7 (2500~2690MHz).

In one embodiment, a first ground main portion 502 of the ground portion 05 extends a second ground branch 503 toward the third radiation conductor 603 along the direction of the LWS edge of the lower edge 101 of the substrate 101 , so that the second ground branch 503 and The third radiation conductors 603 are adjacent and parallel. The second length 503L of the second grounding branch portion 503 is slightly greater than 1/2 of the first grounding length 501L of the grounding main portion 501 .

In one embodiment, there is a capacitive coupling between the second ground branch 503 and the third radiating conductor 603, and the magnitude of the capacitive coupling is determined by the ground main part 501, the second ground branch 503 and the The size of the gap 07 surrounded by the third radiating conductors 603 determines the impedance matching of the antenna.

In one embodiment, by changing the third length 603L of the third radiation conductor 603, the second length 503L of the second ground branch 503, and the vertical distance between the third radiation conductor 603 and the first ground branch 502 At least one of the distances 07W is used to adjust the impedance matching of the antenna 10 .

In one embodiment, the second width 502W of the first ground branch portion 502 is set to be slightly greater than 1/2 of the first ground width 501W of the ground main portion 501 . In addition, the cable grounding area 03 is located on the right side of the antenna grounding main portion 501 , and the longitudinal centerline 40 of the cable grounding area 03 has a certain angle θ with the upper edge 101 of the antenna substrate. The specific angle θ is set so that the average current path length of the antenna 10 starts from the feed-in terminal 02, extends along a second direction 21D, and passes through a connecting conductor 21 and a 90-degree counterclockwise rotation angle TP3 of the first grounding branch 502. And after grounding the main part 501 at the counterclockwise 90-degree corner TP4, it reaches the cable grounding area 03, which is approximately 1/4 of the operating wavelength of the antenna. Through the aforementioned design, the current from the feed-in terminal 02 to the grounding area 03 of the antenna cable is evenly distributed among the connecting conductor 21, the first grounding branch 502 and the grounding main part 501, so that the area of the antenna 10 only needs other general hand-held electronic devices. 30% of the device antenna, and the length only needs 60% of the general antenna, which can meet the transmission characteristic requirements of the antenna. In another embodiment, the specific angle range is set at 53 degrees to 55 degrees, which further enables the size of the antenna 10 to be much smaller than ordinary antennas, about 28 mm×8.2 mm in size.

As shown in Figure 2, the return loss (ReturnLoss) test results of the antenna 10, the antenna corresponding to the frequency of 2.4GHz, 2.45GHz and 2.5GHz return loss values RL1, RL2 and RL3 are respectively -10.729dB, -12.789 dB and -11.295dB, both fall below the desired maximum "-10dB, and a bandwidth of 100MHz is obtained; the bandwidth covers the bandwidth under the wireless communication WiFi2G frequency band standard.

Example 1:

An antenna comprising a feed-in end, a radiation portion, a connecting conductor and a grounding portion; the radiation portion extends from the feed-in end along a first direction to form a first hook; the connecting conductor extends from the feed-in end The input end extends to a short-circuit end along a second direction, wherein the second direction is opposite to the first direction; the ground portion has a cable ground area, and extends from the short-circuit end through the cable ground area, wherein the ground The portion and the connecting conductor form a second hook portion; the cable grounding area has a longitudinal reference centerline; there is a specific angle between the first direction and the longitudinal reference center line; and the specific angle is between 49 degrees to 59 degrees.

The antenna according to embodiment 1, wherein the antenna further includes a substrate; the substrate includes a first surface and has a first width, wherein the first surface is rectangular, and has a first corner area, a second Corner area, a third corner area and a fourth corner area; the grounding part is disposed on the first surface and includes a grounding main part, a first grounding branch part and a second grounding branch part, the grounding main part is set On the fourth corner area, it is rectangular and includes a first edge, a second edge adjacent to the first edge, a third edge opposite to the first edge, and a third edge opposite to the second edge a fourth edge; the first ground branch extends from the first edge, is disposed on the first corner region, and is a rectangular conductor having a second width; the second ground branch extends from the second The edge extends toward the third corner region, and is a rectangular conductor having a first inner edge, a first outer edge opposite to the first inner edge, a second length and a third width; the radiating portion is set On the first surface, including a first radiation conductor, a second radiation conductor and a third radiation conductor: the first radiation conductor extends from the feed-in end and has a second inner edge opposite to the A second outer edge, a first length, and a fourth width of the second inner edge; the second radiating conductor extends from the first radiating conductor, and has a third outer edge and a fifth width; the first radiating conductor extends from the first radiating conductor and has a third outer edge and a fifth width; Three radiating conductors, extending from the second radiating conductor, and having a third inner edge, a fourth outer edge, a fifth outer edge, a third length and a sixth width; the second width is the first 2/5 of the width; the third width, the fourth width, the fifth width, and the sixth width are 1/5 of the first width; the first length is greater than the second length and the third length; the The second length is greater than the third length; there is a space between the radiating part, the connecting conductor and the grounding part; and the third radiating conductor points to the cable grounding area.

According to the antenna described in Embodiment 1, wherein: the total length of the first length plus the fourth width and the third length determines an operating frequency band of the antenna, and the operating frequency band is 2.4GHz-2.5GHz, by the Counting from the feeding end, the length from the connecting conductor and the first grounding branch to the grounding area of the cable is equal to the total length, and the total length is equal to 1/4 of the operating wavelength of the antenna.

The antenna according to Embodiment 1, wherein: the fourth edge coincides with the left edge of the substrate, the third edge coincides with the lower edge of the substrate; the left edge of the first ground branch coincides with the left edge of the substrate, and the first The upper edge of the grounding branch coincides with the upper edge of the substrate; the first outer edge of the second grounding branch coincides with the lower edge of the substrate, and the first inner edge is parallel to and adjacent to the fifth outer edge of the third radiation conductor ; The second outer edge of the first radiation conductor coincides with the upper edge of the substrate; the third outer edge of the second radiation conductor coincides with the right edge of the substrate.

The antenna according to embodiment 1, wherein: there is a specific distance between the fifth outer edge of the third radiating conductor and the third inner edge of the second ground branch, and the specific distance makes the antenna have a predetermined Impedance matching.

According to the antenna described in Embodiment 1, wherein: the antenna further includes a coaxial cable; the coaxial cable also includes a central conductor and a shielded conductor surrounding the central conductor; the cable grounding area further has a first end, and a second end relative to the first end; the longitudinal reference centerline passes through the feed-in end, the first end and the second end; and the center conductor end and the shielded conductor end are respectively connected to the feed-in end Electrically connected to the ground area of the cable.

Example 2:

An antenna comprising a radiating part and a cable grounding area; the radiating part extends along a first direction; the cable grounding area extends along a second direction, wherein there is a gap between the first direction and the second direction A specific angle, and the specific angle is between 49 degrees and 59 degrees.

According to the antenna described in Embodiment 2, wherein: the radiating portion extends along the first direction to form a first radiating conductor, and the first radiating conductor extends through a clockwise 90-degree first corner to form a second radiating conductor , and the second radiating conductor extends through a clockwise 90-degree second corner to form a third radiating conductor.

Example 3:

An antenna comprising a feed-in end, a radiating portion and a grounding portion; the radiating portion extends from the feeding end along a first direction; the grounding portion has a cable grounding area, and the cable grounding area extends from a The second direction extends, wherein there is a specific angle between the first direction and the second direction, and the specific angle is between 49 degrees and 59 degrees.

The antenna according to Embodiment 3, wherein: the average length from the feeding end through the ground part to the center of the cable ground area is a specific value, and the specific value is 1/4 of the operating wavelength; and the antenna's On the surface, except for the feed-in end and the cable grounding area, it is covered with an insulating film, and the exposed feed-in end and the cable grounding area not covered by the insulating film are electrically connected to a cable so that the cable is grounded The area is welded to the shield conductor of the cable, and the feed-in terminal is welded to the center conductor of the cable.

The above-mentioned are only preferred embodiments of this case, for those who are familiar with the technology of this case, the equivalent modifications or changes made according to the spirit of this case should be covered by the following claims.

【Symbol Description】

10: Antenna

101: Substrate

102: Antenna conductor body

101S: First Surface

101UPS: the upper edge of the substrate

101LWS: Lower edge of substrate

101RFS: Right edge of substrate

101LFS: left edge of substrate

101LUC: First Corner Area

101RUC: Second Corner Area

101RLC: Third Corner Area

101LLC: Fourth Corner Area

101W: first width

02: Feed-in terminal

21: Connecting conductors

21D: Second direction

21T: short-circuit end

03: Cable grounding area

04: Cable

40: Longitudinal reference center line

40D: Third direction

401: center conductor

402: shielded conductor

403: insulator

05: Grounding part

501: Grounding main part

501UPS: The First Edge

501RTS: Second Edge

501LWS: Third Edge

501LFS: Fourth Edge

501L: Ground First Length

501W: ground first width

502: The first grounding branch

502W: second width

503UPS: First inner edge

503LWS: First outer edge

503L: second length

503W: third width

503: The second grounding branch

51: the first hook

06: Radiation Department

61: Second hook

601: The first radiating conductor

602: second radiating conductor

602: The third radiating conductor

601D: First Direction

601UPS: second outer edge

601LWS: Second inner edge

601L: first length

601W: Fourth width

602RTS: third outer edge

603RTS: 4th Outer Edge

603LFS: third inner edge

603L: third length

602W: fifth width

603W: sixth width

07: Gap

07W: Vertical distance

TP1: First corner

TP2: Second corner

θ: specific angle

Claims (11)

1. An antenna comprising: feed end; a radiating portion extending from the feeding end along a first direction to form a first hook; a connecting conductor extending from the feeding end to the shorting end in a second direction, wherein the second direction is opposite to the first direction; and A ground portion having a cable ground area and extending from the short-circuit end through the cable ground area, wherein: the ground portion and the connection conductor form a second hook portion; The cable grounding area has a longitudinal reference to the centerline; a specified angle between the first direction and the longitudinal reference centerline; and The specific angle is between 49 degrees and 59 degrees. 2. The antenna of claim 1, wherein: The antenna further includes a substrate; The substrate includes a first surface and has a first width, wherein the first surface is rectangular and has a first corner region, a second corner region, a third corner region and a fourth corner region; The ground portion is disposed on the first surface and includes: The ground main portion, disposed on the fourth corner area, has a rectangular shape and includes a first edge, a second edge adjacent to the first edge, a third edge opposite to the first edge, and a third edge opposite to the first edge. the fourth edge of the second edge; a first ground stub extending from the first edge, disposed on the first corner region, and being a rectangular conductor having a second width; and The second ground branch extends from the second edge toward the third corner region, and is a rectangular conductor having a first inner edge, a first outer edge opposite to the first inner edge, a second length, and a third width ; The radiating portion is disposed on the first surface and includes: a first radiating conductor extending from the feeding end and having a second inner edge, a second outer edge opposite to the second inner edge, a first length, and a fourth width; a second radiating conductor extending from the first radiating conductor and having a third outer edge and a fifth width; and The third radiation conductor extends from the second radiation conductor and has a third inner edge, a fourth outer edge, a fifth outer edge, a third length and a sixth width. 3. The antenna of claim 2, wherein: the second width is 2/5 of the first width; The third width, the fourth width, the fifth width, and the sixth width are 1/5 of the first width; the first length is greater than the second length and the third length; the second length is greater than the third length; there is a gap between the radiation part, the connecting conductor and the ground part; and The third radiating conductor points to the cable grounding area. 4. The antenna of claim 2, wherein: A total length of the first length plus the fourth width and the third length determines an operating frequency band of the antenna, starting from the feed-in end, passing through the connecting conductor and the first ground branch to the cable The length of the ground area is equal to the total length, and the total length is equal to 1/4 of the operating wavelength of the antenna. 5. The antenna of claim 2, wherein: The fourth edge coincides with the left edge of the substrate, and the third edge coincides with the lower edge of the substrate; The left edge of the first ground branch coincides with the left edge of the substrate, and the upper edge of the first ground branch coincides with the upper edge of the substrate; The first outer edge of the second ground branch coincides with the lower edge of the substrate, and the first inner edge is parallel and adjacent to the fifth outer edge of the third radiating conductor; the second outer edge of the first radiation conductor coincides with the upper edge of the substrate; The third outer edge of the second radiation conductor coincides with the right edge of the substrate. 6. The antenna of claim 2, wherein: There is a specific distance between the fifth outer edge of the third radiating conductor and the third inner edge of the second ground branch, and the specific distance enables the antenna to have a predetermined impedance matching. 7. The antenna of claim 1, wherein: The antenna further includes a coaxial cable; the coaxial cable and includes a center conductor and a shield conductor surrounding the center conductor; The cable ground region further has a seventh width, a first end, and a second end opposite the first end; the longitudinal reference centerline passes through the feed-in end, the first end and the second end; and The central conductor and the shielding conductor are electrically connected to the feed-in end and the grounding area of the cable respectively. 8. An antenna comprising: a radiation portion extending along a first direction; and The cable grounding area extends along a second direction, wherein there is a specific angle between the first direction and the second direction, and the specific angle is between 49 degrees and 59 degrees. 9. The antenna of claim 8, wherein: The radiating part extends along the first direction to form a first radiation conductor, the first radiation conductor extends through a first corner of 90 degrees clockwise to form a second radiation conductor, and the second radiation conductor forms a second radiation conductor through a clockwise direction of 90 degrees. The second corner extends to form a third radiation conductor. 10. An antenna comprising: feed end; a radiation part extending from the feeding end along a first direction; and The grounding part has a cable grounding area, and the cable grounding area extends from a second direction, wherein there is a specific angle between the first direction and the second direction, and the specific angle is between 49 degrees and 59 degrees. 11. The antenna of claim 10, wherein: the average length from the feeding end through the grounding part to the center of the grounding area of the cable is a specified value, the specified value being 1/4 of the operating wavelength; and The surface of the antenna is covered with an insulating film except for the feeding end and the cable grounding area, wherein the exposed feeding end and the cable grounding area are electrically connected to the cable without covering the insulating film, so that the The cable ground area is welded to the shield conductor of the cable, and the feed-in is welded to the center conductor of the cable.