Antenna structure

[0046] [First Embodiment]

[0047] First, see figure 1 and figure 2 , figure 1 Is a schematic top view of the antenna structure of the first embodiment of the present invention, that is, a schematic diagram of the antenna structure implemented on a substrate, figure 2 It is a schematic diagram of the circuit architecture of one implementation of the antenna structure of the first embodiment of the present invention. The present invention provides an antenna structure U, which includes a substrate 1, a first radiating element 2, a second radiating element 3, a first inductor 4, a grounding element 5, a first conductive element 6 and a feed-in Piece F. The first radiating element 2, the second radiating element 3, the first inductor 4, and the first conductive element 6 can be disposed on the substrate 1, and the first inductor 4 can be coupled to the first radiating element 2 and the second radiating element 3 In other words, one end (not numbered in the figure) of the first inductor 4 can be coupled to the first radiating element 2, and the other end (not numbered in the figure) of the first inductor 4 can be coupled to the second radiating element 3 . In addition, the second radiating element 3 may have a feeding part 31, and the first conductive element 6 may be coupled between the feeding part 31 of the second radiating element 3 and the grounding part 5. Furthermore, the feeding element F can be coupled between the feeding portion 31 and the grounding element 5 for feeding a signal. In addition, the feeding element F may have a feeding end F1 and a grounding end F2, the feeding end F1 may be coupled to the feeding portion 31, and the grounding end F2 may be coupled to the grounding element 5. In addition, it should be particularly noted that the coupling in the full text of the present invention may be direct connection or indirect connection, or direct electrical connection or indirect electrical connection, and the present invention is not limited thereto.

[0048] In view of the above, it is worth noting that the substrate 1, the first radiating member 2, the second radiating member 3, the grounding member 5, and the first conductive member 6 can be made of any kind of conductive material, and any of the above-mentioned elements can also be used. The forming method is not repeated here. For example, the first radiating element 2, the second radiating element 3, and the first conductive element 6 may be a metal sheet, a metal wire, or other electrical conductors with conductive effects. In addition, the substrate 1 may be a printed circuit board (PCB). Furthermore, the feeding element F can be a coaxial cable, but the present invention is not limited to the above examples. It should be noted that, in order to make the drawings easy to understand, in addition to the schematic diagram of the antenna structure U implemented on the substrate 1, in the other drawings, substitute symbols are used as such figure 1 The architecture of the coaxial cable shown.

[0049] For the above, please refer to figure 1 and figure 2 The second radiating element 3 and the first conductive element 6 can be formed integrally, that is, the second radiating element 3 and the first conductive element 6 can be a metal sheet. In addition, the grounding member 5 can be electrically connected to a metal conductor E, and the metal conductor E and the substrate 1 can be separated from each other. Furthermore, according to the embodiment of the present invention, the first radiating element 2 may include a first radiating part 21, and the second radiating element 3 may further include a second radiating part 32 connected to the feeding part 31. The portion 21 may extend toward a first direction (negative X direction), the second radiation portion 32 may extend toward a second direction (positive X direction), and the first direction and the second direction may be different from each other. For example, take figure 1 and figure 2 In the embodiment, the first direction and the second direction are opposite to each other.

[0050] For the above, please refer to figure 1 and figure 2 In the first embodiment, the first radiating part 21 can generate a first operating frequency band ranging from 698MHz to 960MHz, and the second radiating part 32 can generate a frequency range ranging from 1425MHz to 5850MHz. The second operating frequency band is therefore applicable to the 4G LTE (Long Term Evolution) band (Band) and the 5G LAA (Licensed Assisted Access) band, but the present invention is not limited thereto. In addition, for example, the second operating frequency band may include a first frequency band ranging from 1425MHz to 2690MHz, a second frequency band ranging from 3400MHz to 3800MHz, and a second frequency band ranging from 5150MHz to 5850MHz. Three-band range, but the present invention is not limited to this. In other words, in other embodiments, the second operating frequency band may only have the first frequency band range and the second frequency band range, the second frequency band range and the third frequency band range, or the first frequency band range and the third frequency band range. The invention is not limited to this. However, it should be noted that in Figure 1 to Figure 3 In the antenna structure U provided, the second operating frequency band may also include a frequency range between 4300MHz and 4700MHz. The antenna structure U provided in the first embodiment can operate in the first operating frequency band and the second operating frequency band. The first frequency band range, the frequency band range between 4300MHz and 4700MHz, and the third frequency band range.

[0051] In view of the above, for example, the first inductor 4 may have an inductance value between 1 nanohenry (nH) and 30 nanohenry (nH), but the invention is not limited thereto. In this way, through the first inductance 4 provided on the first radiating element 2 and the second radiating element 3, the signal of the first radiating element 2 can be prevented from affecting the signal of the second radiating element 3, that is, the second radiation can be increased. The matching effect of the element 3 prevents the second radiating element 3 from being affected by the frequency multiplication of the first radiating element 2.

[0052] For the above, please refer to figure 1 and figure 2 , For example, in figure 1 and figure 2 In the embodiment, the first conductive member 6 may have a first conductive body 61, one end (not numbered in the figure) of the first conductive body 61 may be coupled to the feeding portion 31, and the other end of the first conductive body 61 (FIG. (Not marked in the middle) can be coupled to the grounding member 5, but the invention is not limited to this. Next, see image 3 , image 3 It is a schematic diagram of a circuit structure of another implementation of the antenna structure of the first embodiment of the present invention. by image 3 versus figure 2 The comparison shows that in image 3 In the embodiment, the first conductive element 6 may include a first conductive body 61 and a second inductor 62 connected to the first conductive body 61. One end of the first conductive body 61 may be coupled to the feeding portion 31, The other end of the conductive body 61 can be coupled to one end of the second inductor 62 (not numbered in the figure), and the other end (not numbered in the figure) of the second inductor 62 can be coupled to the ground member 5. In addition, for example, the second inductor 62 may have an inductance value between 2.7 nanohenries (nH) and 15 nanohenries (nH), but the invention is not limited thereto. Therefore, by adjusting the inductance value of the second inductor 62, the impedance value corresponding to the center frequency of the first operating frequency band can be adjusted.

[0053] In view of the above, it is worth noting that please refer to Figure 1 to Figure 3 In other embodiments, the antenna structure U may further include a first capacitor (not shown in the figure) and a second capacitor (not shown in the figure), and the first capacitor may be coupled to the first radiating element 2 Between the second radiating element 3 and the first capacitor and the first inductor 4 in series. In addition, the second capacitor may be coupled between the feeding portion 31 and the ground member 5, and the second capacitor and the second inductor 62 may be connected in series with each other. It should be noted that in other embodiments, only the first capacitor or only the second capacitor may be configured. At the same time, by setting the first capacitor and/or the second capacitor, the impedance value of the first operating frequency band and/or the second operating frequency band can be adjusted. In addition, the frequency of the first operating frequency band and/or the second operating frequency band can also be adjusted. range.

[0054] [Second Embodiment]

[0055] First, see Figure 4 , Figure 4 It is a schematic diagram of the circuit architecture of one implementation of the antenna structure of the second embodiment of the present invention. by Figure 4 versus figure 2 It can be seen from the comparison between the second embodiment and the first embodiment that the antenna structure U provided by the second embodiment may further include a stub. Thereby, through the setting of the residual band 7, the center frequency of the third frequency band in the second operating frequency band can be adjusted.

[0056] In view of the above, further speaking, the remnant strip 7 can be disposed on the substrate 1 and formed integrally with the first conductive member 6 and the second radiating element 3. At the same time, the remnant strip 7 can have an open end 71 and a coupling The connecting end 72 of the first conductive member 6. According to the embodiment of the present invention, the connecting end 72 of the stub belt 7 is defined as the first node connected to the open end 71 of the stub belt 7. In addition, the extension length of the open end 71 relative to the connection end 72 can adjust the center frequency of the third frequency band in the second operating frequency band. In other words, compared with the first embodiment, through the setting of the residual band 7, as the length of the residual band 7 is longer, the center frequency of the third frequency band in the second operating frequency band can be adjusted to be closer to the lower frequency.

[0057] Next, see Figure 5 , Figure 5 It is a schematic diagram of the circuit architecture of another implementation of the antenna structure of the second embodiment of the present invention. by Figure 5 versus figure 2 The comparison shows that in Figure 5 In the embodiment described above, the residual belt 7 may have an open end 71 and a connection end 72 coupled to the feeding portion 31. In addition, the residual tape 7 may be provided on one side of the feeding part 31, and the first conductive member 6 may be provided on the other side of the feeding part 31.

[0058] Next, see Image 6 , The first conductive element 6 may include a first conductive body 61 and a second inductor 62, one end of the first conductive body 61 is coupled to the feeding portion 31, and the other end of the first conductive body 61 is coupled to the residual strip 7 At the connecting end 72, one end of the second inductor 62 is coupled between the other end of the first conductive body 61 and the connection end 72 of the stub 7, and the other end of the second inductor 62 is coupled to the ground member 5. In addition, it should be particularly noted that the operating frequency band of the antenna structure U provided by the second embodiment is similar to that of the first embodiment, and the difference between the second embodiment and the first embodiment is that the antenna provided by the second embodiment The structure U can adjust the center frequency of the third frequency band in the second operating frequency band by setting the residual band 7. The other structural features shown in the second embodiment are similar to the description of the foregoing embodiment, and will not be repeated here.

[0059] [Third Embodiment]

[0060] First, see Figure 7 , Figure 7 It is a schematic diagram of the circuit architecture of one implementation of the antenna structure of the third embodiment of the present invention. by Figure 7 versus figure 2 It can be seen from the comparison that the third embodiment differs from the first embodiment in that the antenna structure U provided by the third embodiment may further include a parasitic element P, whereby the second parasitic element P can be added. The gain of the first frequency band range and the second frequency band range in the operating frequency band.

[0061] In view of the above, further speaking, the parasitic element P can be disposed on the substrate 1 and adjacent to the second radiation portion 32. In addition, one end of the parasitic element P can be coupled to the grounding element 5. In the third embodiment, the parasitic element P can have a first parasitic portion P1 coupled to the grounding element 5 and a first parasitic portion P1 bent from the first parasitic portion P1. The second parasitic portion P2 is folded and extends in a direction away from the feeding portion 31.

[0062] Next, see Figure 8 and Picture 9 , Figure 8 Is a schematic diagram of the circuit architecture of another implementation of the antenna structure of the third embodiment of the present invention, Picture 9 It is a schematic top view of the antenna structure of the third embodiment of the present invention. by Figure 8 versus Image 6 It can be seen that compared to Image 6 The way of implementation in Figure 8 In the embodiment, the antenna structure U may further include a parasitic element P, and Figure 8 versus Figure 7 It can be seen that compared to Figure 7 The way of implementation in Figure 8 In the embodiment of, the antenna structure U may further include a residual band 7, and the first conductive member 6 may include a first conductive body 61 and a second inductor 62. In other words, due to Figure 8 In the embodiment, it has the residual band 7, the second inductance 62 and the parasitic element P. Therefore, the antenna structure U can have the characteristics generated by the above-mentioned elements.

[0063] Then, see again Picture 9 It is worth noting that the parasitic element P provided near the second radiating portion 32 of the antenna structure U can be used to enhance the characteristics of the operating frequency band (second operating frequency band) of the second radiating portion 32. Preferably, The gain of the first frequency band range and the second frequency band range in the second operating frequency band can be enhanced. In addition, there may be a predetermined slit W between the second parasitic portion P2 of the parasitic element P and the second radiating portion 32 (that is, the distance between the second parasitic portion P2 and the second radiating portion 32 of the parasitic element P) . At the same time, by adjusting the predetermined slit W of the second parasitic portion P2 relative to the second radiating portion 32, the impedance values ​​corresponding to the center frequencies of the first frequency band range and the second frequency band range in the second operating frequency band can be adjusted, thereby adjusting The value of the voltage standing wave ratio corresponding to the center frequency of the operating frequency band. In other words, the configuration of the parasitic element P can increase the gain of the first frequency band range and the second frequency band range in the second operating frequency band.

[0064] Further, such as Picture 9 As shown, the antenna structure U may further include a bridge member B, which may be disposed on the substrate, and the bridge member B may be coupled between the ground member 5 and the first conductive member 6. In other words, one end (not numbered in the figure) of the first conductive member 6 can be coupled to the feeding portion 31, and the other end (not numbered in the figure) of the first conductive member 6 can be coupled to the bridge B, so that A conductive element 6 is coupled to the ground element 5 through the bridge B. In addition, the feeding end F1 of the feeding element F can be coupled to the feeding portion 31, and the grounding end F2 of the feeding element F can be coupled to the bridge B, so that the feeding element F is coupled to the ground through the bridge B Piece 5. Furthermore, to Picture 9 In terms of the embodiment, the bridge member B can be coupled between the ground member 5, the second inductor 62 of the first conductive member 6, and the feeding member F.

[0065] In view of the above, it is worth noting that the purpose of setting the bridge B is to make the grounding member 5 easy to attach to the substrate 1, although Picture 9 It is stated in the embodiment that the bridge B may be further provided, however, in other embodiments, the bridge B may not be provided. In addition, it is worth mentioning that, for example, the material of the bridge member B may be tin or other conductive materials, and the material of the ground member 5 may be copper or other conductive materials, but the present invention is not limited thereto.

[0066] In addition, it should be particularly noted that the antenna structure U provided in the third embodiment can operate in a first frequency band range, a second frequency band range, and a third frequency band range of the first operating frequency band and the second operating frequency band. The other structural features shown in the third embodiment are similar to the description of the foregoing embodiment, and will not be repeated here.

[0067] Then, please also refer to Picture 10 And Table 1 below, Picture 10 It is a graph of the voltage standing wave ratio (VSWR) of the antenna structure of the third embodiment of the present invention at different frequencies.

[0068] Table 1

[0069] node Frequency (MHz) Voltage standing wave ratio M1 698 4.67 M2 960 4.71 M3 1425 3.20 M4 2690 2.05 M5 3400 2.18 M6 3800 2.94 M7 5150 3.03 M8 5850 3.48