TWM675950U - Antenna structure - Google Patents

Abstract

An antenna structure includes a feeding radiation element, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a fifth radiation element, a sixth radiation element, and a carrier element. The first radiation element is coupled to the feeding radiation element. The second radiation element is coupled to the feeding radiation element. The first radiation element and the second radiation element extend in different directions. The third radiation element is coupled to a ground voltage. The first radiation element and the second radiation element are at least partially surrounded by the third radiation element. The fourth radiation element is coupled to the ground voltage. The fourth radiation element is adjacent to the feeding radiation element. The fifth radiation element is coupled to the ground voltage. The fifth radiation element is disposed between the feeding radiation element and the third radiation element. The sixth radiation element is coupled to the ground voltage. The sixth radiation element is adjacent to the third radiation element.

Description

Antenna structure

This work relates to an antenna structure, particularly a wideband antenna structure.

With the advancement of mobile communication technology, mobile devices have become increasingly common in recent years. Common examples include laptops, mobile phones, multimedia players, and other hybrid portable electronic devices. To meet people's needs, mobile devices often have wireless communication capabilities. Some cover long-range wireless communication ranges, such as mobile phones using 2G, 3G, and LTE (Long Term Evolution) systems and their use of 700MHz, 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, 2300MHz, and 2500MHz frequency bands for communication. Others cover short-range wireless communication ranges, such as Wi-Fi and Bluetooth systems using 2.4GHz, 5.2GHz, and 5.8GHz frequency bands for communication.

Antennas are essential components in wireless communications. If the operating bandwidth of an antenna used to receive or transmit signals is too narrow, communication quality on mobile devices can deteriorate. Therefore, designing a compact, wideband antenna structure is a crucial challenge for designers.

In a preferred embodiment, the invention provides an antenna structure comprising: a feed radiating portion having a feed point; a first radiating portion coupled to the feed radiating portion; a second radiating portion coupled to the feed radiating portion, wherein the first radiating portion and the second radiating portion extend in different directions; a third radiating portion coupled to a ground potential, wherein the first radiating portion and the second radiating portion are at least partially surrounded by the third radiating portion; a fourth radiating portion coupled to the ground potential, wherein the third radiating portion is connected to the ground potential. The fourth radiation portion is adjacent to the feed radiation portion; a fifth radiation portion is coupled to the ground potential, wherein the fifth radiation portion is disposed between the feed radiation portion and the third radiation portion; a sixth radiation portion is coupled to the ground potential, wherein the sixth radiation portion is adjacent to the third radiation portion; and a carrier element, wherein the feed radiation portion, the first radiation portion, the second radiation portion, the third radiation portion, the fourth radiation portion, the fifth radiation portion, and the sixth radiation portion are all disposed on the carrier element.

In some embodiments, the antenna structure further includes: a widened radiation portion coupled to the feed radiation portion and the second radiation portion, wherein the widened radiation portion is substantially in the shape of a square.

In some embodiments, a first coupling gap is formed between the third radiating portion and each of the first radiating portion and the second radiating portion, and a width of the first coupling gap is between 0.5 mm and 1.5 mm.

In some embodiments, a second coupling gap is formed between the feed radiation portion and the fourth radiation portion, and a width of the second coupling gap is between 1 mm and 1.5 mm.

In some embodiments, a third coupling gap is formed between the third radiating portion and the sixth radiating portion, and a width of the third coupling gap is between 3.5 mm and 4 mm.

In some embodiments, the antenna structure covers a first frequency band, a second frequency band, a third frequency band, and a fourth frequency band, the first frequency band is between 703 MHz and 803 MHz, the second frequency band is between 1710 MHz and 1880 MHz, the third frequency band is between 1880 MHz and 2170 MHz, and the fourth frequency band is between 2500 MHz and 2690 MHz.

In some embodiments, the total length of the feed radiation portion and the first radiation portion is between 0.125 times the wavelength and 0.25 times the wavelength of the second frequency band.

In some embodiments, the total length of the feed radiation portion and the second radiation portion is between 0.125 times the wavelength and 0.25 times the wavelength of the third frequency band.

In some embodiments, the length of the third radiation portion is between 0.125 times the wavelength and 0.25 times the wavelength of the first frequency band.

In some embodiments, the length of the fourth radiation portion is between 0.125 times the wavelength and 0.25 times the wavelength of the fourth frequency band.

To make the purpose, features, and advantages of this invention more clearly understood, specific embodiments of this invention are listed below, along with accompanying diagrams for detailed description.

Certain terms are used in the specification and patent application to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different terms to refer to the same component. This specification and patent application do not use differences in name as a way to distinguish components, but rather use differences in the functions of the components as the criterion for distinction. The words "include" and "including" mentioned throughout the specification and patent application are open-ended terms and should be interpreted as "including but not limited to". The word "substantially" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and achieve the basic technical effect. In addition, the word "coupled" in this specification includes any direct and indirect electrical connection means. Therefore, if a first device is described herein as being coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device via other devices or connection means.

The following disclosure provides many different embodiments or examples for implementing different features of the present invention. The following disclosure describes specific examples of various components and their arrangements to simplify the description. Of course, these specific examples are not intended to be limiting. For example, if this disclosure describes a first feature formed on or above a second feature, it means that it may include an embodiment in which the first feature and the second feature are in direct contact, and it may also include an embodiment in which additional features are formed between the first feature and the second feature, so that the first feature and the second feature may not be in direct contact. In addition, the same reference symbols and/or labels may be reused in different examples of the following disclosure. These repetitions are for the purpose of simplification and clarity and are not intended to limit the specific relationship between the different embodiments and/or structures discussed.

Additionally, spatially relative terms such as "below," "beneath," "lower," "above," "upper," and similar terms are used to facilitate describing the relationship of one element or feature to another element or feature in a diagram. These spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings. The device may be rotated 90 degrees or in other orientations, and the spatially relative terms used herein should be interpreted accordingly.

FIG1 is a schematic diagram of an antenna structure 100 according to an embodiment of the present invention. Antenna structure 100 can be used in a mobile device, such as a smartphone, a tablet computer, a notebook computer, a wireless access point, a router, or any other device with communication capabilities. Alternatively, antenna structure 100 can be used in an electronic device, such as any unit in the Internet of Things (IoT).

In the embodiment of FIG. 1 , the antenna structure 100 includes at least a feeding radiation element 110, a first radiation element 120, a second radiation element 130, a third radiation element 140, a fourth radiation element 150, a fifth radiation element 160, a sixth radiation element 170, and a carrier element 190. The feeding radiation element 110, the first radiation element 120, the second radiation element 130, the third radiation element 140, the fourth radiation element 150, the fifth radiation element 160, and the sixth radiation element 170 can all be made of metal materials, such as copper, silver, aluminum, iron, or alloys thereof.

The feed radiating portion 110 can be roughly shaped like a medium straight bar. Specifically, the feed radiating portion 110 has a first end 111 and a second end 112 , with a feeding point FP located at the first end 111 of the feed radiating portion 110 . The feeding point FP can be further coupled to a signal source 199 . For example, the signal source 199 can be a radio frequency (RF) module that can be used to excite the antenna structure 100 .

The first radiating portion 120 may be generally shaped like a long straight strip (compared to the feed radiating portion 110) and may be generally perpendicular to the feed radiating portion 110. Specifically, the first radiating portion 120 has a first end 121 and a second end 122, wherein the first end 121 of the first radiating portion 120 is coupled to the second end 112 of the feed radiating portion 110, and the second end 122 of the first radiating portion 120 is an open end.

The second radiating portion 130 can be roughly L-shaped. Specifically, the second radiating portion 130 has a first end 131 and a second end 132. The first end 131 of the second radiating portion 130 is coupled to the second end 112 of the feed radiating portion 110 and the first end 121 of the first radiating portion 120, while the second end 132 of the second radiating portion 130 is an open end. For example, the second end 122 of the first radiating portion 120 and the second end 132 of the second radiating portion 130 can extend in different directions.

The third radiating portion 140 can generally exhibit a meandering shape. Specifically, the third radiating portion 140 has a first end 141 and a second end 142, wherein the first end 141 of the third radiating portion 140 is coupled to a ground voltage (VSS), and the second end 142 of the third radiating portion 140 is an open end. It should be noted that both the first radiating portion 120 and the second radiating portion 130 can be at least partially surrounded by the third radiating portion 140. In some embodiments, the third radiating portion 140 includes a U-shaped portion 145 to accommodate the aforementioned second radiating portion 130. In some embodiments, a first coupling gap GC1 may be formed between the third radiating portion 140 and each of the first radiating portion 120 and the second radiating portion 130 .

The fourth radiating portion 150 can generally present a larger L-shape (compared to the second radiating portion 130) and can be disposed adjacent to the feed radiating portion 110. Specifically, the fourth radiating portion 150 has a first end 151 and a second end 152. The first end 151 of the fourth radiating portion 150 is coupled to the ground potential VSS, while the second end 152 of the fourth radiating portion 150 is an open end. For example, the second end 122 of the first radiating portion 120, the second end 142 of the third radiating portion 140, and the second end 152 of the fourth radiating portion 150 can all extend in substantially the same direction. In some embodiments, a second coupling gap GC2 may be formed between the feed radiation portion 110 and the fourth radiation portion 150. It should be understood that the term "adjacent" or "adjacent" in this specification may refer to a distance between two corresponding elements being less than a predetermined distance (e.g., 5 mm or less), but generally does not include a situation where the two corresponding elements are in direct contact with each other (i.e., the aforementioned distance is shortened to 0).

The fifth radiating portion 160 can be roughly shaped like a shorter straight strip (compared to the feed radiating portion 110) and can be roughly parallel to the feed radiating portion 110. Specifically, the fifth radiating portion 160 has a first end 161 and a second end 162. The first end 161 of the fifth radiating portion 160 is coupled to the ground potential VSS, while the second end 162 of the fifth radiating portion 160 is an open end. For example, the second end 132 of the second radiating portion 130 and the second end 162 of the fifth radiating portion 160 can extend in roughly opposite directions. It should be noted that the fifth radiating portion 160 is disposed between the feed radiating portion 110 and the third radiating portion 140.

The sixth radiating portion 170 can be generally rectangular and can be disposed adjacent to the third radiating portion 140. Specifically, the sixth radiating portion 170 has a first end 171 and a second end 172. The first end 171 of the sixth radiating portion 170 is coupled to the ground potential VSS, while the second end 172 of the sixth radiating portion 170 is an open end. For example, the width W6 of the sixth radiating portion 170 can be greater than the widths of any other radiating portion. In some embodiments, a third coupling gap GC3 can be formed between the third radiating portion 140 and the sixth radiating portion 170.

In some embodiments, the antenna structure 100 further includes a Specific Absorption Rate (SAR) sensor 175. The SAR sensor 175 is coupled to the sixth radiating portion 170, allowing the sixth radiating portion 170 to serve as a sensing pad for the SAR sensor 175. Consequently, the SAR associated with the antenna structure 100 can be further reduced. It should be understood that the SAR sensor 175 is an optional component and may be removed in other embodiments.

For example, the carrier element 190 can be a flexible printed circuit (FPC). The feed radiation portion 110, the first radiation portion 120, the second radiation portion 130, the third radiation portion 140, the fourth radiation portion 150, the fifth radiation portion 160, and the sixth radiation portion 170 can all be disposed on the same surface of the carrier element 190. The shape and type of the carrier element 190 are not particularly limited in this invention. In some embodiments, the antenna structure 100 can be a planar antenna structure. However, this invention is not limited thereto. In other embodiments, the antenna structure 100 can also be modified into a three-dimensional antenna structure without affecting its radiation efficiency.

In some embodiments, the antenna structure 100 further includes a widening radiation element 180, which may be disposed adjacent to the second end 162 of the fifth radiation portion 160. The widening radiation element 180 is coupled to the second end 112 of the feed radiation portion 110 and the first end 131 of the second radiation portion 130. For example, the widening radiation element 180 may be substantially square, but is not limited to this. Additionally, a monopole slot 185 may be formed between the second radiation portion 130 and the widening radiation element 180. It should be understood that the widening radiation element 180 is merely an optional component and may be removed in other embodiments.

Figure 2 shows a Voltage Standing Wave Ratio (VSWR) graph of antenna structure 100 according to an embodiment of this invention, where the horizontal axis represents operating frequency (MHz) and the vertical axis represents the VSWR. Based on the measurement results in Figure 2, antenna structure 100 can cover a first frequency band FB1, a second frequency band FB2, a third frequency band FB3, and a fourth frequency band FB4. For example, the first frequency band FB1 may be between 703 MHz and 803 MHz, the second frequency band FB2 may be between 1710 MHz and 1880 MHz, the third frequency band FB3 may be between 1880 MHz and 2170 MHz, and the fourth frequency band FB4 may be between 2500 MHz and 2690 MHz. Therefore, the antenna structure 100 can support broadband operation of at least LTE (Long Term Evolution) and 5G (5th Generation Wireless Systems).

In some embodiments, the operating principle of the antenna structure 100 can be described as follows. The third radiating portion 140 can generate the aforementioned first frequency band FB1. The feed radiating portion 110 and the first radiating portion 120 can generate the aforementioned second frequency band FB2. The feed radiating portion 110 and the second radiating portion 130 can generate the aforementioned third frequency band FB3. The fourth radiating portion 150 can generate the aforementioned fourth frequency band FB4. Based on actual measurement results, the fifth radiating portion 160 can be used to fine-tune the impedance matching of the aforementioned third frequency band FB3, while the sixth radiating portion 170 can be used to fine-tune the impedance matching of the aforementioned first frequency band FB1. In addition, the bandwidth-increasing radiation unit 180 can also be used to increase the bandwidth of the aforementioned third frequency band FB3.

In some embodiments, the dimensions of the components of the antenna structure 100 may be as follows: The total length L1 of the feed radiating portion 110 and the first radiating portion 120 may be between 0.125 and 0.25 times the wavelength of the second frequency band FB2 of the antenna structure 100 (λ/8 to λ/4), for example, approximately 0.2 times the wavelength (λ/5). The total length L2 of the feed radiating portion 110 and the second radiating portion 130 may be between 0.125 and 0.25 times the wavelength of the third frequency band FB3 of the antenna structure 100 (λ/8 to λ/4), for example, approximately 0.2 times the wavelength (λ/5). The length L3 of the third radiating portion 140 may be between 0.125 and 0.25 times the wavelength of the first frequency band FB1 of the antenna structure 100 (λ/8 to λ/4), for example, approximately 0.2 times the wavelength (λ/5). The length L4 of the fourth radiating portion 150 may be between 0.125 and 0.25 times the wavelength of the fourth frequency band FB4 of the antenna structure 100 (λ/8 to λ/4), for example, approximately 0.2 times the wavelength (λ/5). The length L5 of the fifth radiating portion 160 may be between 4 mm and 7 mm. The length L6 of the sixth radiating portion 170 may be between 15 mm and 18 mm, and the width W6 of the sixth radiating portion 170 may be between 8 mm and 10 mm. The length L7 of the widened radiating portion 180 can be between 4 mm and 6 mm, and the width W7 of the widened radiating portion 180 can also be between 4 mm and 6 mm. The length L8 of the monopole slot 185 can be between 4 mm and 5 mm. The width of the first coupling gap GC1 can be between 0.5 mm and 1.5 mm. The width of the second coupling gap GC2 can be between 1 mm and 1.5 mm. The width of the third coupling gap GC3 can be between 3.5 mm and 4 mm. The above component size ranges are based on multiple experimental results and help optimize the operating bandwidth and impedance matching of the antenna structure 100, while also minimizing the specific absorption rate associated with the antenna structure 100.

In some embodiments, the antenna structure 100 can be applied to a mobile router (not shown) to support wireless communication. For example, the antenna structure 100 can be attached to an inner wall of a non-conductive housing of the mobile router, but is not limited thereto.

This invention proposes a novel antenna structure. Compared to traditional designs, it boasts advantages such as small size, wide bandwidth, and low specific absorption rate, making it well-suited for applications in a variety of mobile communication devices or the Internet of Things.

It's important to note that the component sizes, shapes, and frequency ranges described above are not limitations of this invention. Antenna designers can adjust these settings according to their needs. The antenna structure of this invention is not limited to the configurations shown in Figures 1-2. This invention may include any one or more features from any one or more of the embodiments shown in Figures 1-2. In other words, not all illustrated features must be implemented simultaneously in this invention's antenna structure.

In this specification and the scope of the patent application, ordinal numbers, such as "first", "second", "third", etc., have no sequential relationship with each other and are only used to mark and distinguish two different components with the same name.

Although this invention is disclosed above with reference to preferred embodiments, these are not intended to limit the scope of this invention. Anyone skilled in the art may make minor changes and modifications without departing from the spirit and scope of this invention. Therefore, the scope of protection for this invention shall be determined by the scope of the patent application attached hereto.

100: Antenna structure 110: Feed radiation section 111: First end of the feed radiation section 112: Second end of the feed radiation section 120: First radiation section 121: First end of the first radiation section 122: Second end of the first radiation section 130: Second radiation section 131: First end of the second radiation section 132: Second end of the second radiation section 140: Third radiation section 141: First end of the third radiation section 142: Second end of the third radiation section 145: U-shaped portion of the third radiation section 150: Fourth radiation section 151: First end of the fourth radiation section 152: Second end of the fourth radiation section 160: Fifth radiation section 161: First end of the fifth radiating portion 162: Second end of the fifth radiating portion 170: Sixth radiating portion 171: First end of the sixth radiating portion 172: Second end of the sixth radiating portion 175: Specific absorption rate sensor 180: Broadened radiating portion 185: Monopole slot 190: Carrier element 199: Signal source FB1: First frequency band FB2: Second frequency band FB3: Third frequency band FB4: Fourth frequency band FP: Feed point GC1: First coupling gap GC2: Second coupling gap GC3: Third coupling gap L1, L2, L3, L4, L5, L6, L7, L8: Length VSS: Ground potential W6, W7: Width

FIG1 is a schematic diagram showing an antenna structure according to an embodiment of the present invention. FIG2 is a voltage-to-wave ratio diagram of the antenna structure according to an embodiment of the present invention.

100: Antenna structure

110: Feed Radiation Department

111: First end of the feed radiation unit

112: Feeding the second end of the radiation unit

120: First Radiation Division

121: First end of the first radiation section

122: Second end of the first radiation section

130: Second Radiation Division

131: First end of the second radiation section

132: Second end of the second radiation section

140: The Third Radiation Division

141: First end of the third radiation section

142: Second end of the third radiation section

145: U-shaped portion of the third radiation section

150: The Fourth Radiation Division

151: The first end of the fourth radiation section

152: Second end of the fourth radiation section

160: Fifth Radiation Division

161: The first end of the fifth radiation section

162: The second end of the fifth radiation section

170: Sixth Radiation Division

171: First end of the sixth radiation section

172: Second end of the sixth radiation section

175:Specific Absorption Rate Sensor

180: Widen the radiation section

185: Single-pole slot

190: Carrier Component

199:Signal Source

FP: Feed Point

GC1: First coupling gap

GC2: Second coupling gap

GC3: Third coupling gap

L1, L2, L3, L4, L5, L6, L7, L8: Length

VSS: Ground potential

W6, W7: Width

Claims (10)

An antenna structure includes: a feed radiating portion having a feed point; a first radiating portion coupled to the feed radiating portion; a second radiating portion coupled to the feed radiating portion, wherein the first radiating portion and the second radiating portion extend in different directions; a third radiating portion coupled to a ground potential, wherein the first radiating portion and the second radiating portion are at least partially surrounded by the third radiating portion; a fourth radiating portion coupled to the ground potential, wherein the fourth radiating portion is adjacent to the feed radiating portion; and a fifth radiating portion coupled to the ground potential, wherein the fifth radiating portion is disposed between the feed radiating portion and the third radiating portion. a sixth radiation portion coupled to the ground potential, wherein the sixth radiation portion is adjacent to the third radiation portion; and a carrier element, wherein the feed radiation portion, the first radiation portion, the second radiation portion, the third radiation portion, the fourth radiation portion, the fifth radiation portion, and the sixth radiation portion are all disposed on the carrier element. The antenna structure as described in claim 1 further includes: a widened radiation portion coupled to the feed radiation portion and the second radiation portion, wherein the widened radiation portion is substantially in the shape of a square. The antenna structure as described in claim 1, wherein a first coupling gap is formed between the third radiating portion and each of the first radiating portion and the second radiating portion, and the width of the first coupling gap is between 0.5 mm and 1.5 mm. The antenna structure as described in claim 1, wherein a second coupling gap is formed between the feed radiation portion and the fourth radiation portion, and the width of the second coupling gap is between 1 mm and 1.5 mm. The antenna structure as described in claim 1, wherein a third coupling gap is formed between the third radiating portion and the sixth radiating portion, and the width of the third coupling gap is between 3.5 mm and 4 mm. The antenna structure as described in claim 1, wherein the antenna structure covers a first frequency band, a second frequency band, a third frequency band, and a fourth frequency band, the first frequency band is between 703 MHz and 803 MHz, the second frequency band is between 1710 MHz and 1880 MHz, the third frequency band is between 1880 MHz and 2170 MHz, and the fourth frequency band is between 2500 MHz and 2690 MHz. The antenna structure as described in claim 6, wherein the total length of the feed radiation portion and the first radiation portion is between 0.125 times the wavelength and 0.25 times the wavelength of the second frequency band. The antenna structure as described in claim 6, wherein the total length of the feed radiation portion and the second radiation portion is between 0.125 times the wavelength and 0.25 times the wavelength of the third frequency band. The antenna structure as described in claim 6, wherein the length of the third radiating portion is between 0.125 times the wavelength and 0.25 times the wavelength of the first frequency band. The antenna structure as described in claim 6, wherein the length of the fourth radiating portion is between 0.125 times the wavelength and 0.25 times the wavelength of the fourth frequency band.