This application claims priority of Taiwanese Patent Application No. 107208517, filed on Jun. 25, 2018.
The disclosure relates to an antenna, and more particularly to an antenna applied to digital television bandwidths.
In the recent years, many countries has focused on promoting digital television (DTV) services to effectively use available finite frequency bands and to improve quality of audio and video transmission. Antennas for receiving signals transmitted by wireless TV stations serve as intermediate elements between an audio-video device and the wireless TV stations. The antennas convert electric signal to electromagnetic wave and vise versa, and are configured to reduce attenuation loss of electromagnetic wave at a specific frequency band to thereby increase signal-to-noise ratio (SNR) of received signals.
Referring to
Therefore, an object of the disclosure is to provide an antenna having a relatively good transceiving performance.
According to an aspect of the disclosure, an antenna includes a conductor portion, a grounding portion, and a radiator portion. The conductor portion extends in a first direction. The grounding portion includes a main grounding section, a first wing section, a second wing section and a grounding line section. The main grounding section extends in the first direction, is spaced apart from the conductor portion in a second direction transverse to the first direction, and has two ends opposite to each other in the first direction. The first wing section and the second wing section extend in the second direction respectively from the two ends of the main grounding section toward the conductor portion, and are spaced apart from each other in the first direction. The grounding line section extends from the main grounding section, and includes a base line segment and at least one extension segment. The base line segment extends in the second direction from a portion of the main grounding section between the first wing section and the second wing section toward the conductor portion, and has a distal end close to the conductor portion. The extension segment extends from the distal end of the base line segment in the first direction toward the first wing section. The radiator portion is disposed between the second wing section and the grounding line section and includes a feeding point, a base line section and at least one extension section. The feeding point is disposed adjacent to the main grounding section. The base line section extends from the feeding point toward the conductor portion and has a distal portion close to the conductor portion. The extension section extends from the distal portion of the base line section toward the second wing section.
Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiments with reference to the accompanying drawings, of which:
Before the disclosure is described in greater detail, it should be noted that where considered appropriate, reference numerals or terminal portions of reference numerals have been repeated among the figures to indicate corresponding or analogous elements, which may optionally have similar characteristics.
Referring to
The conductor portion 2 is located at an upper portion in
The conductor portion 2 has floating potential and is substantially symmetric with respect to an imaginary line (I) extending in the second direction (Y). In particular, the imaginary line (I) is a center line of the substrate 9. The main conductor 21 and the auxiliary conductor 22 are both substantially rectangular in this embodiment. Note that the term “symmetric” as used herein means two elements that are symmetric in terms of geometric shape and may have some minor differences in size.
The main conductor 21 has a length of 132±35 mm in the first direction (X), i.e., ranging from 97 mm to 167 mm, preferably 132 mm, and a width of 16±4 mm in the second direction (Y), i.e., ranging from 12 mm to 20 mm, preferably 16 mm. In the following description, the expression of (A)±(B) mm represents that the depicted size may range from (A+B) mm to (A−B) mm and (A) mm is a preferable example. The auxiliary conductor 22 has a length of 112±30 mm in the first direction (X) and a width of 1.5±0.4 mm in the second direction (Y). A distance between the main conductor 21 and the auxiliary conductor 21 is 3±1 mm. Note that, the function of the conductor 2 is similar to that of a director of Yagi-Uda antenna, which is also known as a parasitic element and is capable of increasing directivity and gain of the antenna.
The grounding portion 3 is grounded and includes a main grounding section 31, a first wing section 32, a second wing section 33 and a grounding line section 34. The main grounding section 31 is located at a lower portion in
The first wing section 32 and the second wing section 33 extend in the second direction (Y) respectively from the two (upper left and upper right) ends of the main grounding section 31 toward the conductor portion 2, and are spaced apart from each other in the first direction (X). In this embodiment, the first wing section 32 has a length in the second direction (Y) greater than that of the second wing section 33, and is formed with an indented portion 321.
The first wing section 32 has a length of 67±15 mm in the second direction (Y) and a width of 12±3 mm in the first direction (X). The indented portion 321 is in the shape of a rectangle and is defined by a left side extending in the second direction (Y) and facing an opening of the indented portion 321, and upper and lower sides extending in the first direction (X) and spaced apart from each other in the second direction (Y). Each of the upper and lower sides has a length of 8.3±2 mm in the first direction (X), and the left side has a length of 8.5±2 mm in the second direction (Y). A distance between an upper right vertex of the first wing section 32 (in
A distance between a left side of the first wing section 32 and a left end of the main grounding section 31 (i.e., a distance of a segment 322 in
The grounding line section 34 extends from the main grounding section 31, and includes a base line segment 341, two extension segments 342 and a connecting segment 343. The base line segment 341 extends in the second direction (Y) from a portion of the main grounding section 31 between the first wing section 32 and the second wing section 33 toward the conductor portion 2, and has a distal end close to the conductor portion 2. In particular, the base line segment 341 extends from a portion of the main grounding section 31 adjacent to the imaginary line (I). The extension segments 342 extend from the distal end of the base line segment 341 in the first direction (X) toward the first wing section 32 and are spaced apart from each other in the second direction (Y). The connecting segment 343 extends in the second direction (Y) and interconnects terminal ends respectively of the extension segments 342. The extension segments 342, the connecting segment 343 and the distal end of the base line segment 341 cooperate with one another to define an opening region 35 thereamong. The indented portion 321 of the first wing section 32 receives the terminal ends of the extension segments 342 and the connecting segment 343 therein.
The base line segment 341 has a length of 52±10 mm in the second direction (Y) and a width of 2±0.5 mm in the first direction (X). Each of the extension segments 342 has a length of 85.8±20 mm in the first direction (X) and a width of 2±0.5 mm in the second direction (Y), and a distance between the extension segments 342 in the second direction (Y) is 3±1 mm. The connecting segment 343 has a width of 2±0.5 mm in the first direction (X).
A distance between the main grounding section 31 and a lower one of the extension segments 342 that is proximate to the main grounding section 31 in the second direction (Y) is 45±10 mm, a distance between the auxiliary conductor 22 and an upper one of the extension segments 342 that is proximate to the auxiliary conductor 22 is 8±2 mm, and a distance between the base line segment 341 and the first wing section 32 in the first direction is 79±20 mm. A distance between the connecting segment 343 and the left side of the indented portion 321 in the first direction (X) is 1.5±0.4 mm, a distance between the upper side of the indented portion 321 and the upper one of the extension segments 342 in the second direction (Y) is 0.9±0.2 mm, and a distance between the lower side of the indented portion 321 and the lower one of the extension segments 342 in the second direction (Y) is 0.5±0.1 mm.
The radiator portion 4 is disposed between the second wing section 33 and the grounding line section 34, and includes a feeding point 41, a base line section 42, two extension sections 43 and a connecting section 44. The feeding point 41 is disposed adjacent to the main grounding section 31. In this embodiment, the feeding point 41 is located on the imaginary line (I) and is adjacent to the main grounding section 31, but the present disclosure is not limited in this respect. The base line section 42 extends from the feeding point 41 toward the conductor portion 2 and has a distal portion close to the conductor portion 2. The extension sections 43 extend from the distal portion of the base line section 42 toward the second wing section 33 in the first direction (X) and are spaced apart from each other in the second direction (Y). The connecting section 44 extends in the second direction (Y) and interconnects terminal ends respectively of the extension sections 43. The extension sections 43, the connecting section 44 and the distal portion of the base line section 42 cooperate with one another to define a radiating region 45 thereamong. The radiator portion 4 and the grounding line section 34 are substantially symmetric with respect to another imaginary line (not shown) extending in the second direction (Y) between the base line segment 341 and the base line section 42.
A distance between the feeding point 41 and the main grounding section 31 in the second direction (Y) is 2±0.5 mm, a distance between the base line section 42 and the base line segment 341 in the first direction (X) is 0.8±0.2 mm, and a distance between the extension sections 43 in the second direction (Y) is 3±1 mm. The base line section 42 has a length of 50±10 mm in the second direction (Y) and a width of 2±0.5 mm in the first direction (X), the connecting section 44 has a width of 2±0.5 mm in the first direction (X), and each of the extension sections 43 has a length of 85±20 mm in the first direction (X) and a width of 2±0.5 mm in the second direction (Y).
A distance between an uppermost end of the second wing section 33 distal from the main grounding section 31 and a lower one of the extension sections 43 in the second direction (Y) is 1±0.2 mm, a distance between the main grounding section 31 and the lower one of the extension sections 43 in the second direction (Y) is 45±10 mm, a distance between the auxiliary conductor 21 and an upper one of the extension sections 43 in the second direction (Y) is 8±2 mm, and a distance between the base line section 42 and the second wing section 33 in the first direction (X) is 81±20 mm.
The length of the first wing section 32 in the second direction (Y) (i.e., 67±15 mm) is larger than the distance between the main grounding section 31 and either/upper one of the extension segments 342 of the grounding line section 34, and the length of the second wing section 33 in the second direction (Y) (i.e., 44±10 mm) is smaller than the distance between the main grounding section 31 and either/lower one of the extension section 43 of the radiator portion 4.
Referring to
Referring to
Referring to
As shown in
To sum up, by virtue of the structures and configurations of the conductor 2, the grounding portion 3 and the radiator portion 4, antenna gain of the antenna of the present disclosure can be improved as compared to that of conventional antenna. In this way, efficiency for receiving signals in digital TV can be improved. Additionally, the antenna of the present disclosure is implemented in a single layer structure and thus cost for manufacturing the antenna is relatively low.
In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects, and that one or more features or specific details from one embodiment may be practiced together with one or more features or specific details from another embodiment, where appropriate, in the practice of the disclosure.
While the disclosure has been described in connection with what are considered the exemplary embodiments, it is understood that this disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
Number | Date | Country | Kind |
---|---|---|---|
107208517 | Jun 2018 | TW | national |