Multi-frequency printed antenna

Abstract

A multi-frequency printed antenna includes: a circuit board; the metal layer is arranged on the circuit carrier plate; the slot penetrates through the metal layer and comprises a spacing slot which divides the metal layer into a radiating body positioned at the upper left part and a grounding body positioned at the lower right part, a radiating body slot which extends from the spacing slot into the radiating body, and a grounding body slot which extends from the spacing slot into the grounding body; the bottom end opening is formed in the bottom end edge of the left side of the metal layer, the right end opening is formed in the right side edge of the metal layer, the first groove part extends upwards from the bottom end opening, and the second groove part extends rightwards from the top end of the first groove part to the right end opening. And the extending path of the interval slot is inverted 7-shaped.

Description

TECHNICAL FIELD

[0001] The utility model relates to an antenna, especially a small-size printed antenna with multiple frequency bands. BACKGROUND

[0002] In recent years, with the vigorous development of mobile communication, various mobile devices are becoming wireless, and consumers prefer to choose more convenient mobile devices, which promotes the design of the appearance size of the mobile devices and peripheral devices on the market to be small in size. The volume of mobile devices and peripheral devices is getting smaller and smaller. For example, the volume of digital cameras is getting smaller and smaller, which limits the space occupied by the antenna housed in the digital camera shell. Under the premise of meeting the smaller space, the antenna needs to have the ability to provide multiple working frequency bands to cover the working frequency band range of the long-term evolution technology (LTE) system, but the small size of the antenna itself makes it difficult to provide multiple frequency bands.

[0003] Therefore, it is necessary to provide a multi-frequency printed antenna that can provide multiple frequency bands in a limited space. SUMMARY

[0004] The utility model discloses a multi-frequency printed antenna, which comprises a circuit carrier plate, a metal layer arranged on the circuit carrier plate, the metal layer being provided with a top edge and a bottom edge, a left side edge and a right side edge, and a slot penetrating through the metal layer and comprising a separation slot separating the metal layer into a radiator on the upper left and a ground body on the lower right, a radiator slot extending from the separation slot to the radiator, and a ground body slot extending from the separation slot to the ground body; wherein the separation slot comprises a bottom opening arranged on the left bottom edge of the metal layer, a right end opening arranged on the right side edge of the metal layer, a first slot part extending upward from the bottom opening, and a second slot part extending from the top end of the first slot part to the right end opening, the left end of the second slot part being provided with a feed-in end of the radiator and a ground end of the ground body on the upper and lower sides respectively, and the extension path of the separation slot is in the shape of an inverted 7, the radiator slot is formed by extending from the top end of the first slot part to the top edge, the extension path of the radiator slot is in the shape of an inverted L, and the ground body slot is formed by extending from the right end of the bottom opening to the top edge, the extension path of the ground body slot is in the shape of an inverted L.

[0005] In some embodiments, the radiation body slotting comprises a third slot extending linearly from the top end of the first slot toward the top end edge, the third slot being longitudinally long strip-shaped, and a fourth slot extending linearly from the top end of the third slot toward the right side edge, the fourth slot being transversely long strip-shaped, and the fourth slot being above the second slot, the lower side of the fourth slot corresponding to the upper side of the second slot.

[0006] In some embodiments, the ground body slotting comprises a fifth slot extending linearly from the right end of the bottom end opening toward the top end edge, the fifth slot being longitudinally long strip-shaped, and the fifth slot being right to the first slot, the left side of the fifth slot corresponding to the right side of the first slot, and a sixth slot extending linearly from the top end of the fifth slot toward the right side edge, the sixth slot being transversely long strip-shaped, the sixth slot extending rightward for a distance less than that of the second slot, the right end of the sixth slot being flush with the right end of the fourth slot, and the sixth slot being below the second slot, the upper side of the sixth slot corresponding to the lower side of the second slot.

[0007] In some embodiments, the widths of the first and third slots are greater than that of the fifth slot, the width of the first slot is equal to that of the third slot, and the width of the second slot is greater than those of the fourth and sixth slots.

[0008] In some embodiments, the width of the second slot is greater than that of the first slot.

[0009] In summary, the multi-frequency printed antenna has the ability to stably provide multiple working frequency bands in limited space. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to make the above and other purposes, features, advantages and embodiments of the present application more obvious, understandable and better understood, the content of the present application can be better understood by reading the accompanying drawings.

[0011] Figure 1 is a structural diagram of the multi-frequency printed antenna of the present application.

[0012] Figure 2 is a voltage standing wave ratio test diagram of the multi-frequency printed antenna of the present application.

[0013] Figure 3 is a reflection loss diagram of the multi-frequency printed antenna of the present application.

[0014] Figure 4 is an efficiency diagram of the multi-frequency printed antenna of the present application. DETAILED DESCRIPTION

[0015] To explain the technical content, construction features, purposes and effects of the multi-frequency printed antenna in detail, examples are given below and described in detail with reference to the drawings. For the convenience of description, in the patent specification, the upper side is defined as the higher position in the direction facing the drawing, the lower side is defined as the lower position in the direction facing the drawing, the left side is defined as the position on the left hand side in the direction facing the drawing, and the right side is defined as the position on the right hand side in the direction facing the drawing.

[0016] Please refer to Figure 1 The multi-frequency printed antenna 100 is arranged on a circuit carrier 10 of an electronic device (not shown in the figure), and the multi-frequency printed antenna 100 is composed of a metal layer 20 arranged on the circuit carrier 10 and a slot 30 penetrating the metal layer 20. In this embodiment, the metal layer 20 is in a rectangular shape and is provided with opposite top and bottom edges and opposite left and right edges, and the slot 30 includes a separation slot 31 separating the metal layer 20 into a radiator 40 on the upper left side and a ground body 50 on the lower right side, a radiator slot 41 extending from the separation slot 31 into the radiator 40, and a ground body slot 51 extending from the separation slot 31 into the ground body 50.

[0017] Please refer to Figure 1 The separation slot 31 includes a bottom end opening 311 arranged at the bottom end edge of the left side of the metal layer 20, a right end opening 312 arranged at the right side edge of the metal layer 20, a first slot portion 313 extending upward from the bottom end opening 311, and a second slot portion 314 extending rightward from the top end of the first slot portion 313 to the right end opening 312. The extension path of the separation slot 31 is in the shape of an inverted 7.

[0018] The extension path of the radiator slot 41 is in the shape of an inverted L, and includes a third slot portion 411 extending linearly from the top end of the first slot portion 313 toward the top edge and a fourth slot portion 412 extending linearly from the top end of the third slot portion 411 toward the right side edge. The third slot portion 411 is in a longitudinal strip shape, and the upward extension distance of the third slot portion 411 is less than the upward extension distance of the first slot portion 313. The fourth slot portion 412 is in a horizontal strip shape, and the fourth slot portion 412 is located above the second slot portion 314, and the lower side of the fourth slot portion 412 corresponds to the upper side of the second slot portion 314.

[0019] The extension path of the slot 51 of the ground body is in inverted L shape, and includes a fifth slot part 511 extending linearly from the right end of the bottom end opening 311 to the top end edge, and a sixth slot part 512 extending linearly from the top end of the fifth slot part 511 to the right side edge. The fifth slot part 511 is in longitudinal strip shape, and is located at the right side of the first slot part 313, and the left side of the fifth slot part 511 corresponds to the right side of the first slot part 313. The sixth slot part 512 is in horizontal strip shape, and the rightward extension distance of the sixth slot part 512 is less than the rightward extension distance of the second slot part 314, the right end of the sixth slot part 512 is flush with the right end of the fourth slot part 412, and the sixth slot part 512 is located below the second slot part 314, and the upper side of the sixth slot part 512 corresponds to the lower side of the second slot part 314.

[0020] Continuing to refer to Figure 1 , the upper side and the lower side of the left end of the second slot part 314 are respectively provided with a feeding end 42 located at the radiator 40 and a grounding end 52 located at the ground body 50.

[0021] In the embodiment, the widths of the first slot part 313 and the third slot part 411 are greater than the width of the fifth slot part 511, and the width of the first slot part 313 is equal to the width of the third slot part 411. The width of the second slot part 314 is greater than the widths of the fourth slot part 412 and the sixth slot part 512, and the width of the second slot part 314 is greater than the width of the first slot part 313.

[0022] When the multi-frequency printed antenna 100 is used for wireless communication, current is fed from the feeding end 42, and the frequency band oscillated by the current flowing through the radiator 40 is 700MHz to 960MHz. The ground body 50 is relatively coupled to the radiator 40 to generate a frequency band of 1.71GHz to 3GHz.

[0023] The first slot part 313 to the sixth slot part 512 have certain size requirements, so that the first slot part 313 to the sixth slot part 512 have coupling effect, can transmit or interact with each other by electromagnetic waves of the radiator 40 and the ground body 50, to oscillate the frequency band of 700MHz to 960MHz and 1.71GHz to 3GHz. The multi-frequency printed antenna 100 of the utility model increases the frequency band that can be provided in limited space.

[0024] In practice, the width of the first slot 313 is 1.85 mm, the width of the second slot 314 is 2.15 mm, the width of the third slot 411 is 1.85 mm, the width of the fourth slot 412 is 1.2 mm, the width of the fifth slot 511 is 0.8 mm, and the width of the sixth slot 512 is 1.25 mm.

[0025] Referring to Figure 2 , a Voltage Standing Wave Ratio (VSWR) test diagram of the multi-frequency printed antenna 100. When the multi-frequency printed antenna 100 operates at 700 MHz, the voltage standing wave ratio is 2.0272 (M1 in the figure), when the multi-frequency printed antenna 100 operates at 960 MHz, the voltage standing wave ratio is 2.3783 (M2 in the figure), when the multi-frequency printed antenna 100 operates at 1.71 GHz, the voltage standing wave ratio is 2.5715 (M3 in the figure), when the multi-frequency printed antenna 100 operates at 2.7 GHz, the voltage standing wave ratio is 1.6863 (M4 in the figure), and when the multi-frequency printed antenna 100 operates at 3 GHz, the voltage standing wave ratio is 2.9158 (M5 in the figure). Therefore, the multi-frequency printed antenna 100 can stably operate in the frequency range of 700 MHz to 960 MHz and 1.71 GHz to 3 GHz.

[0026] Referring to Figure 3 , as shown, the multi-frequency printed antenna 100 of the utility model operates in the frequency range of 700 MHz to 960 MHz and 1.71 GHz to 3 GHz, and the reflection loss of the frequency width is approximately within -10 dB, which shows that the multi-frequency printed antenna 100 has a small loss degree and a large radiation energy. Figure 3

[0027] Frequency (MHz) Efficiency (%) 740 47.83 940 47.96 1740 71.33 1950 60.21 2130 71.32 2360 68.51 2500 76.82 2700 64.52

[0028] Table 1.

[0029] Referring to Figure 4 and Table 1, an efficiency diagram and data table of the multi-frequency printed antenna 100 of the utility model. When the antenna operates at different frequencies, the higher the efficiency value converted from the average power, the better the performance of the antenna. In this embodiment, the efficiency of the multi-frequency printed antenna 100 in the operating frequency range of 700 MHz to 960 MHz and 1.71 GHz to 3 GHz is approximately 60%, so the multi-frequency printed antenna 100 of the utility model can achieve high efficiency in a limited space in the operating frequency range and maintain a certain level of performance.

[0030] ​In summary, the multi-frequency printed antenna 100 can increase the provided frequency bands in limited space, and adapt to the development trend of miniaturization and wireless of electronic products.

[0031] Although the present application has been disclosed with reference to the embodiments above, it is not intended to limit the present application, and anyone skilled in the art can make some changes and modifications without departing from the spirit and scope of the present application. The scope of protection of the present application shall be subject to the appended claims.

Claims

1. A multi-frequency printed antenna, characterized in that: It includes: a circuit carrier board; a metal layer disposed on the circuit carrier board, the metal layer having a top edge and a bottom edge opposite to each other, as well as a left edge and a right edge opposite to each other; And a slot penetrating the metal layer, comprising a spacer slot dividing the metal layer into a radiator located in the upper left and a grounding body located in the lower right, a radiator slot extending from the spacer slot into the radiator, and a grounding body slot extending from the spacer slot into the grounding body; wherein the spacer slot comprises a bottom opening at the bottom left edge of the metal layer, a right opening at the bottom right edge of the metal layer, a first groove extending upward from the bottom opening, and a groove extending upward from the first... The top of the first slot extends to the right to the second slot with the right end opening. The upper and lower sides of the left end of the second slot are respectively provided with a feed end located on the radiator and a grounding end located on the grounding body. The extension path of the slot is in the shape of an inverted 7. The radiator slot is formed by extending from the top of the first slot toward the top edge. The extension path of the radiator slot is in the shape of an inverted L. The grounding body slot is formed by extending from the right end of the bottom opening toward the top edge. The extension path of the grounding body slot is in the shape of an inverted L.

2. The multi-frequency printed antenna as described in claim 1, characterized in that: The radiator slot includes a third slot extending in a straight line from the top of the first slot toward the top edge and a fourth slot extending in a straight line from the top of the third slot toward the right edge. The third slot is longitudinally elongated, the fourth slot is transversely elongated, and the fourth slot is located above the second slot, with the lower side of the fourth slot corresponding to the upper side of the second slot.

3. The multi-frequency printed antenna as described in claim 2, characterized in that: The grounding electrode slot includes a fifth slot extending in a straight line from the right end of the bottom opening towards the top edge, and a sixth slot extending in a straight line from the top edge of the fifth slot towards the right edge. The fifth slot is longitudinally elongated and is located to the right of the first slot. The left side of the fifth slot corresponds to the right side of the first slot. The sixth slot is transversely elongated and extends to the right by a distance less than that of the second slot. The right end of the sixth slot is flush with the right end of the fourth slot and is located below the second slot. The upper side of the sixth slot corresponds to the lower side of the second slot.

4. The multi-frequency printed antenna as described in claim 3, characterized in that: The width of the first groove and the third groove is greater than the width of the fifth groove, and the width of the first groove is equal to the width of the third groove, and the width of the second groove is greater than the width of the fourth groove and the sixth groove.

5. The multi-frequency printed antenna as described in claim 4, characterized in that: The width of the second groove is greater than the width of the first groove.

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