TW202145644A - Antenna structure - Google Patents

Abstract

An antenna structure includes a feeding radiation element, a connection radiation element, a shorting radiation element, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a fifth radiation element, and a dielectric substrate. The feeding radiation element is coupled to a signal source. The connection radiation element is coupled to the feeding radiation element. The shorting radiation element is coupled to a ground voltage. The first radiation element is coupled to the shorting radiation element. The second radiation element is coupled to the connection radiation element. The third radiation element is coupled to the feeding radiation element and the connection radiation element. The third radiation element and the second radiation element substantially extend in opposite directions. The fourth radiation element is coupled to the connection radiation element and the second radiation element. The fifth radiation element is coupled to the shorting radiation element and the first radiation element.

Description

Antenna structure

The present invention relates to an antenna structure, and more particularly, to an antenna structure that can cover broadband operation.

In order to meet people's needs, mobile devices usually have the function of wireless communication.

Antenna is an indispensable element in the field of wireless communication. If the bandwidth of the antenna used for receiving or transmitting signals is insufficient, the communication quality of the mobile device is likely to be degraded. Therefore, how to design small-sized, wide-band antenna elements is an important issue for antenna designers.

In a preferred embodiment, the present invention provides an antenna structure, comprising: a feeding radiating portion, coupled to a signal source; a connecting radiating portion, coupled to the feeding radiating portion; and a short-circuiting radiating portion, coupled to to a ground potential; a first radiating part, coupled to the short-circuit radiating part; a second radiating part, coupled to the connection radiating part; a third radiating part, coupled to the feeding radiating part and the connection a radiating part, wherein the third radiating part and the second radiating part extend in opposite directions; a fourth radiating part is coupled to the connecting radiating part and the second radiating part; a fifth radiating part is coupled to the short-circuit radiating part and the first radiating part; and a dielectric substrate, wherein the feeding radiating part, the connecting radiating part, the short-circuiting radiating part, the first radiating part, the second radiating part, the third radiating part The radiating part, the fourth radiating part, and the fifth radiating part are all formed on the dielectric substrate.

In order to make the objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are given in the following, and are described in detail as follows in conjunction with the accompanying drawings.

Certain terms are used throughout the specification and claims to refer to particular elements. It should be understood by those skilled in the art that hardware manufacturers may refer to the same element by different nouns. This specification and the scope of the patent application do not use the difference in name as a way to distinguish elements, but use the difference in function of the elements as a criterion for distinguishing. The words "including" and "including" mentioned in the entire specification and the scope of the patent application are open-ended terms, so they 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. Furthermore, the term "coupled" in this specification includes any direct and indirect electrical connection means. Therefore, if a first device is described as being coupled to a second device, it means that the first device can be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connecting means. Second device.

FIG. 1 shows a top view of an antenna structure 100 according to an embodiment of the present invention. The antenna structure 100 can be incorporated into a mobile device, such as a smart phone, a tablet computer, or a notebook computer. As shown in FIG. 1 , the antenna structure 100 at least includes: a Feeding Radiation Element 110 , a Connection Radiation Element 120 , a Shorting Radiation Element 130 , and a first Radiation Element 140 , a second radiating part 150 , a third radiating part 160 , a fourth radiating part 170 , a fifth radiating part 180 , and a Dielectric Substrate 195 , into which radiation is fed The portion 110 , the connecting radiation portion 120 , the short-circuit radiation portion 130 , the first radiation portion 140 , the second radiation portion 150 , the third radiation portion 160 , the fourth radiation portion 170 , and the fifth radiation portion 180 are all formed on the dielectric substrate 195 . The feeding radiating part 110 , the connecting radiating part 120 , the short-circuiting radiating part 130 , the first radiating part 140 , the second radiating part 150 , the third radiating part 160 , the fourth radiating part 170 , and the fifth radiating part 180 can all be made of metal material Made of, for example, copper, silver, aluminum, iron, or alloys thereof.

The dielectric substrate 195 may be a FR4 (Flame Retardant 4) substrate, a printed circuit board (Printed Circuit Board, PCB), or a flexible circuit board (Flexible Circuit Board, FCB). The dielectric substrate 195 has a first surface E1 and a second surface E2 opposite to each other, wherein the feeding radiating part 110 , the connecting radiating part 120 , the second radiating part 150 , the third radiating part 160 , and the fourth radiating part 170 can all be The short-circuit radiation portion 130 , the first radiation portion 140 , and the fifth radiation portion 180 can be arranged on the second surface E2 of the dielectric substrate 195 . It must be understood that, according to different design requirements, the aforementioned radiating portions can be arbitrarily moved to the first surface E1 or the second surface E2 of the dielectric substrate 195, which does not affect the effect of the present invention. FIG. 2 is a top view of a part of the antenna structure 100 on the first surface E1 of the dielectric substrate 195 according to an embodiment of the present invention. FIG. 3 is a perspective view showing another part of the element of the antenna structure 100 on the second surface E2 of the dielectric substrate 195 according to an embodiment of the present invention (that is, the dielectric substrate 195 is regarded as a transparent element) . Please refer to Figures 1, 2 and 3 together.

The feeding and radiating part 110 may be roughly in the shape of a straight bar. In detail, the feeding radiating portion 110 has a first end 111 and a second end 112 , wherein the first end 111 of the feeding radiating portion 110 is coupled to a signal source (Signal Source) 199 . For example, the signal source 199 can be a radio frequency (RF) module, which can be used to excite the antenna structure 100 .

The connecting radiating portion 120 may be substantially in a straight shape, which may be substantially perpendicular to the feeding radiating portion 110 . In detail, the connecting radiation portion 120 has a first end 121 and a second end 122 , wherein the first end 121 of the connecting radiation portion 120 is coupled to the second end 112 of the feeding radiation portion 110 .

The short-circuit radiating portion 130 may be approximately in an N-shape. Specifically, the short-circuit radiation portion 130 has a first end 131 and a second end 132 , wherein the first end 131 of the short-circuit radiation portion 130 is coupled to a ground voltage VSS. The ground potential VSS may be provided by a System Ground Plane of the antenna structure 100 (not shown).

The first radiating portion 140 may be substantially L-shaped, and the length of the first radiating portion 140 may be the longest among all the radiating portions. In detail, the first radiating part 140 has a first end 141 and a second end 142 , wherein the first end 141 of the first radiating part 140 is coupled to the second end 132 of the short-circuiting radiating part 130 , and the first The second end 142 of the radiation portion 140 is an open end.

The second radiating part 150 may be roughly in the shape of a straight bar. In detail, the second radiating part 150 has a first end 151 and a second end 152 , wherein the first end 151 of the second radiating part 150 is coupled to the second end 122 of the connecting radiating part 120 , and the second The second end 152 of the radiation portion 150 is an open end. The second end 152 of the second radiating portion 150 and the second end 142 of the first radiating portion 140 may extend substantially in the same direction.

The third radiating portion 160 may be substantially a straight bar with unequal width, and may be substantially perpendicular to the feeding radiating portion 110 . In some embodiments, a combination of the feeding radiating part 110 , the connecting radiating part 120 , the second radiating part 150 , and the third radiating part 160 is approximately in a T shape. In detail, the third radiating part 160 has a first end 161 and a second end 162 , wherein the first end 161 of the third radiating part 160 is coupled to the second end 112 of the feeding radiating part 110 and connecting the radiation The first end 121 of the portion 120 and the second end 162 of the third radiating portion 160 are open ends, which and the second end 152 of the second radiating portion 150 can extend in substantially opposite directions. In some embodiments, the third radiation portion 160 includes a narrow portion 164 and a wider portion 165 coupled to each other, wherein the narrow portion 164 is adjacent to the first end 161 of the third radiation portion 160 , The wider portion 165 is adjacent to the second end 162 of the third radiating portion 160 . It must be noted that the term "adjacent" or "adjacent" in this specification may mean that the distance between the corresponding two elements is less than a predetermined distance (for example: 5mm or shorter), and may also include that the two corresponding elements are in direct contact with each other. case (ie, the aforementioned pitch is shortened to 0). In some embodiments, the narrower portion 164 of the third radiation portion 160 has a vertical projection on the second surface E2 of the dielectric substrate 195 , and the vertical projection may at least partially overlap with the first radiation portion 140 .

The fourth radiating portion 170 may substantially present a V-shape. In detail, the fourth radiation part 170 has a first end 171 and a second end 172 , wherein the first end 171 of the fourth radiation part 170 is coupled to the second end 122 of the connection radiation part 120 and the second radiation The first end 151 of the portion 150 and the second end 172 of the fourth radiating portion 170 are open ends. In some embodiments, the fourth radiation portion 170 includes a first portion 174 and a second portion 175 coupled to each other, wherein the first portion 174 is adjacent to the first end 171 of the fourth radiation portion 170 , The second portion 175 is adjacent to the second end 172 of the fourth radiating portion 170 . The first portion 174 of the fourth radiating portion 170 may be substantially perpendicular to both the connecting radiating portion 120 and the second radiating portion 150 . The second portion 175 of the fourth radiating portion 170 may not be parallel to the connecting radiating portion 120 and the second radiating portion 150 . An included angle θ1 between the first portion 174 and the second portion 175 of the fourth radiating portion 170 may be between 30 degrees and 60 degrees, for example, about 45 degrees, but not limited thereto.

The fifth radiating part 180 may be roughly in the shape of a straight bar. In detail, the fifth radiation portion 180 has a first end 181 and a second end 182 , wherein the first end 181 of the fifth radiation portion 180 is coupled to the second end 132 of the short-circuit radiation portion 130 and the first radiation The first end 141 of the portion 140 and the second end of the fifth radiating portion 180 are an open end, which and the second end 142 of the first radiating portion 140 can extend in substantially opposite directions.

FIG. 4 shows a top view of an antenna structure 400 according to another embodiment of the present invention. FIG. 4 is similar to FIG. 1, the difference between the two is that the antenna structure 400 in FIG. 4 further includes a sixth radiating portion 190, which can be made of metal material and can be disposed on the first surface E1 of the dielectric substrate 195 . FIG. 5 is a top view of a part of the antenna structure 400 on the first surface E1 of the dielectric substrate 195 according to another embodiment of the present invention. FIG. 6 is a perspective view showing another part of the elements of the antenna structure 400 on the second surface E2 of the dielectric substrate 195 according to another embodiment of the present invention. Please refer to Figures 4, 5 and 6 together.

The sixth radiating part 190 may be substantially in a straight shape, and may be substantially parallel to the feeding radiating part 110 . In detail, the sixth radiating portion 190 has a first end 191 and a second end 192, wherein the first end 191 of the sixth radiating portion 190 is coupled to the ground potential VSS, and the second end 191 of the sixth radiating portion 190 is coupled to the ground potential VSS. Terminal 192 is an open circuit terminal. The sixth radiating part 190 is adjacent to the feeding radiating part 110 , so that a coupling gap (Coupling Gap) GC1 is formed between the sixth radiating part 190 and the feeding radiating part 110 . The remaining features of the antenna structure 400 in Figs. 4, 5, and 6 are similar to those in the antenna structure 100 in Figs. 1, 2, and 3, so the two embodiments can achieve similar operational effects.

FIG. 7 shows a return loss diagram of the antenna structure 400 according to an embodiment of the present invention, wherein the horizontal axis represents the operating frequency (MHz), and the vertical axis represents the return loss (dB). According to the measurement result of FIG. 7, the antenna structure 400 can cover a first frequency band FB1, a second frequency band FB2, a third frequency band FB3, a fourth frequency band FB4, a fifth frequency band FB5, and a sixth frequency band FB6, and a seventh frequency band FB7. For example, the first frequency band FB1 may be between 600MHz and 700MHz, the second frequency band FB2 may be between 700MHz and 960MHz, the third frequency band FB3 may be between 1710MHz and 2170MHz, and the fourth frequency band FB4 may be between 2300MHz and 2300MHz. Between 2700MHz, the fifth frequency band FB5 may be between 3300MHz and 3800MHz, the sixth frequency band FB6 may be between 4000MHz and 5000MHz, and the seventh frequency band FB7 may be between 5000MHz and 6000MHz. Therefore, the antenna structure 400 will at least support broadband operation in the sub-6GHz frequency band in next-generation 5G communications.

FIG. 8 is a diagram showing the radiation efficiency of the antenna structure 400 according to an embodiment of the present invention, wherein the horizontal axis represents the operating frequency (MHz), and the vertical axis represents the return loss (dB). According to the measurement results in FIG. 8 , the antenna structure 400 operates in the aforementioned first frequency band FB1 , second frequency band FB2 , third frequency band FB3 , fourth frequency band FB4 , fifth frequency band FB5 , sixth frequency band FB6 , and seventh frequency band FB7 The radiation efficiency can reach -4dB or higher, which can meet the practical application requirements of general mobile communication devices.

In some embodiments, the principle of operation of the antenna structure 400 may be as follows. The short-circuit radiating part 130 and the first radiating part 140 can be jointly excited to generate the first frequency band FB1 . The feeding radiating part 110 , the connecting radiating part 120 , and the second radiating part 150 can be jointly excited to generate the second frequency band FB2 . The feeding radiating part 110 and the third radiating part 160 can be jointly excited to generate the third frequency band FB3. The feeding radiating part 110 , the connecting radiating part 120 , and the fourth radiating part 170 can be jointly excited to generate a fourth frequency band FB4 . The short-circuit radiating part 130 and the fifth radiating part 180 can be jointly excited to generate the fifth frequency band FB5. The frequency-doubling resonance of the first radiating part 140 and the second radiating part 150 can be excited to generate the sixth frequency band FB6. The sixth radiation part 190 can be excited to generate the seventh frequency band FB7.

In some embodiments, the element dimensions of the antenna structure 400 may be as follows. The total length L1 of the short-circuit radiation portion 130 and the first radiation portion 140 may be approximately equal to 0.25 times the wavelength (λ/4) of the first frequency band FB1 of the antenna structure 400 . The total length L2 of the feeding radiating part 110 , the connecting radiating part 120 , and the second radiating part 150 may be approximately equal to 0.25 times the wavelength (λ/4) of the second frequency band FB2 of the antenna structure 400 . The total length L3 of the feeding radiating portion 110 and the third radiating portion 160 may be approximately equal to 0.25 times the wavelength (λ/4) of the third frequency band FB3 of the antenna structure 400 . The total length L4 of the feeding radiating part 110 , the connecting radiating part 120 , and the fourth radiating part 170 may be approximately equal to 0.25 times the wavelength (λ/4) of the fourth frequency band FB4 of the antenna structure 400 . The total length L5 of the short-circuit radiation portion 130 and the fifth radiation portion 180 may be approximately equal to 0.25 times the wavelength (λ/4) of the fifth frequency band FB5 of the antenna structure 400 . The length L6 of the sixth radiation portion 190 may be approximately equal to 0.25 times the wavelength (λ/4) of the seventh frequency band FB7 of the antenna structure 400 . The width of the coupling gap GC1 between the sixth radiating part 190 and the feeding radiating part 110 may be less than or equal to 1 mm. In the third radiation portion 160 , the width W32 of the wider portion 165 may be between 2 to 3 times the width W31 of the narrower portion 164 . For example, the width W31 of the narrower portion 164 may be between 1 mm and 1.5 mm, and the width W32 of the wider portion 165 may be between 2 mm and 3 mm. The above size ranges are obtained according to multiple experimental results, which help to optimize the operation bandwidth and impedance matching of the antenna structure 400 .

The present invention proposes a novel antenna structure which can at least cover the broadband operation of the sub-6GHz frequency band in the next-generation 5G communication. Generally speaking, the present invention at least has the advantages of small size, wide frequency band, and low manufacturing cost, etc., so it is very suitable for application in various types of mobile communication devices.

It is worth noting that the above-mentioned component size, component shape, and frequency range are not limitations of the present invention. Antenna designers can adjust these settings according to different needs. The antenna structure of the present invention is not limited to the state illustrated in FIGS. 1-8. The present invention may include only any one or more of the features of any one or more of the embodiments of Figures 1-8. In other words, not all of the features shown in the figures need to be simultaneously implemented in the antenna structure of the present invention.

The ordinal numbers in this specification and the scope of the patent application, such as "first", "second", "third", etc., do not have a sequential relationship with each other, and are only used to mark and distinguish two identical different elements of the name.

Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the scope of the present invention. Anyone skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the scope of the appended patent application.

100,400: Antenna Structure 110: Feed into the radiation part 111: Feed into the first end of the radiating part 112: Feed into the second end of the radiating part 120: Connect the radiation part 121: Connect the first end of the radiation part 122: Connect the second end of the radiation part 130: Short circuit radiation part 131: The first end of the short-circuit radiation part 132: The second end of the short-circuit radiation part 140: First Radiation Department 141: The first end of the first radiation part 142: The second end of the first radiation part 150: Second Radiation Department 151: The first end of the second radiation part 152: The second end of the second radiation part 160: Third Radiation Department 161: The first end of the third radiating part 162: The second end of the third radiating part 164: Narrower part of the third radiant 165: The wider part of the third radiating part 170: Fourth Radiation Division 171: The first end of the fourth radiant 172: The second end of the fourth radiant 174: Part 1 of the Fourth Radiation 175: Part 2 of the Fourth Radiation 180: Fifth Radiation Division 181: The first end of the fifth radiant 182: The second end of the fifth radiant 190: Sixth Radiation Division 191: The first end of the sixth radiant 192: The second end of the sixth radiant 195: Dielectric Substrate 199: Signal Source E1: The first surface of the dielectric substrate E2: The second surface of the dielectric substrate FB1: first frequency band FB2: Second frequency band FB3: The third frequency band FB4: Fourth Band FB5: Fifth Band FB6: Band 6 FB7: Band Seven GC1: Coupling Gap L1,L2,L3,L4,L5,L6: length W31,W32: width VSS: ground potential θ1: included angle

FIG. 1 is a top view showing an antenna structure according to an embodiment of the present invention. FIG. 2 is a top view of a part of the antenna structure on the first surface of the dielectric substrate according to an embodiment of the present invention. FIG. 3 is a perspective view showing another part of the antenna structure on the second surface of the dielectric substrate according to an embodiment of the present invention. FIG. 4 is a top view of an antenna structure according to another embodiment of the present invention. FIG. 5 is a top view of a part of the antenna structure on the first surface of the dielectric substrate according to another embodiment of the present invention. FIG. 6 is a perspective view showing another part of the antenna structure on the second surface of the dielectric substrate according to another embodiment of the present invention. FIG. 7 shows a return loss diagram of an antenna structure according to an embodiment of the present invention. FIG. 8 is a diagram showing the radiation efficiency of the antenna structure according to an embodiment of the present invention.

100: Antenna structure

110: Feed into the radiation part

120: Connect the radiation part

130: Short circuit radiation part

140: First Radiation Department

150: Second Radiation Department

160: Third Radiation Department

170: Fourth Radiation Division

180: Fifth Radiation Division

195: Dielectric Substrate

199: Signal Source

VSS: ground potential

Claims (10)

An antenna structure comprising: a feed-in radiation portion, coupled to a signal source; a connecting radiating part, coupled to the feeding radiating part; a short-circuit radiation portion, coupled to a ground potential; a first radiation portion, coupled to the short-circuit radiation portion; a second radiation portion coupled to the connection radiation portion; a third radiating part, coupled to the feeding radiating part and the connecting radiating part, wherein the third radiating part and the second radiating part extend substantially in opposite directions; a fourth radiating part, coupled to the connecting radiating part and the second radiating part; a fifth radiation portion, coupled to the short-circuit radiation portion and the first radiation portion; and A dielectric substrate, wherein the feeding radiation portion, the connection radiation portion, the short-circuit radiation portion, the first radiation portion, the second radiation portion, the third radiation portion, the fourth radiation portion, and the fifth radiation portion The parts are all formed on the dielectric substrate. The antenna structure according to claim 1, wherein the dielectric substrate has a first surface and a second surface opposite to each other, wherein the feeding radiating part, the connecting radiating part, the second radiating part, and the third radiating part , and the fourth radiating portion are all disposed on the first surface of the dielectric substrate, and wherein the short-circuiting radiating portion, the first radiating portion, and the fifth radiating portion are all disposed on the second surface of the dielectric substrate superior. The antenna structure of claim 1, wherein a combination of the feeding radiating portion, the connecting radiating portion, the second radiating portion, and the third radiating portion presents a T-shape. The antenna structure of claim 1, wherein the first radiating portion presents an L-shape. The antenna structure as claimed in claim 1, wherein the third radiating portion is in the shape of a straight bar with unequal width. The antenna structure of claim 1, wherein the fourth radiating portion comprises a first portion and a second portion coupled to each other, and an included angle between the first portion and the second portion between 30 and 60 degrees. The antenna structure according to claim 2, further comprising: A sixth radiating part is coupled to the ground potential, wherein the sixth radiating part is disposed on the first surface of the dielectric substrate. The antenna structure of claim 7, wherein the sixth radiating part is adjacent to the feeding radiating part, so that a coupling gap is formed between the sixth radiating part and the feeding radiating part. The antenna structure of claim 7, wherein the antenna structure covers a first frequency band, a second frequency band, a third frequency band, a fourth frequency band, a fifth frequency band, a sixth frequency band, and a seventh frequency band , the first frequency band is between 600MHz and 700MHz, the second frequency band is between 700MHz and 960MHz, the third frequency band is between 1710MHz and 2170MHz, and the fourth frequency band is between 2300MHz and 2700MHz The fifth frequency band is between 3300MHz and 3800MHz, the sixth frequency band is between 4000MHz and 5000MHz, and the seventh frequency band is between 5000MHz and 6000MHz. The antenna structure of claim 9, wherein the total length of the short-circuit radiating portion and the first radiating portion is approximately equal to 0.25 times the wavelength of the first frequency band, wherein the feeding radiating portion, the connecting radiating portion, and the The total length of the second radiating portion is approximately equal to 0.25 wavelengths of the second frequency band, wherein the total length of the feeding radiation portion and the third radiating portion is approximately equal to 0.25 wavelengths of the third frequency band, wherein the feeding radiation The total length of the short-circuit radiating part, the connecting radiating part, and the fourth radiating part is approximately equal to 0.25 times the wavelength of the fourth frequency band, wherein the total length of the short-circuit radiating part and the fifth radiating part is approximately equal to 0.25 of the fifth frequency band times the wavelength, wherein the length of the sixth radiation portion is approximately equal to 0.25 times the wavelength of the seventh frequency band.

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