Patent Application
20080084353
The invention will become more fully understood from the detailed description given herein below illustration only, and thus is not limitative of the present invention, and wherein:
The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.
Referring to
The capacitance matching portion 22 and the radiating portion 21 are disposed opposite to each other. In this embodiment, the capacitance matching portion 22 and the radiating portion 21 are parallel to each other based on that the capacitance effect is generated according to the parallel-plate principle.
The inductance matching portion 23 has one end 231 electrically connected with the radiating portion 21 and the other end 232 electrically connected with the capacitance matching portion 22. The inductance matching portion 23 may have a semi-circular shape, an arched shape or a horseshoe shape. In this embodiment, the inductance matching portion 23 has the horseshoe shape.
The feeding portion 24 is electrically connected with an inner side 233 of the inductance matching portion 23 and located among the capacitance matching portion 22, the inductance matching portion 23 and the radiating portion 21. In this embodiment, the feeding portion 24 is perpendicular to the radiating portion 21.
The grounding portion 25 is electrically connected with an outer side 234 of the inductance matching portion 23. In other words, the grounding portion 25 is electrically connected with the radiating portion 21 and the capacitance matching portion 22 through the outer side 234 of the inductance matching portion 23. Compared with the conventional printed antenna 1, in which the grounding portion 12 is only electrically connected with one end of the radiating portion 13, the electrical connection region between the grounding portion 25 and the outer side 234 of the inductance matching portion 23 in the printed antenna 2 of the invention is larger than the electrical connection region between the grounding portion 12 and the end of the radiating portion 13 in the conventional printed antenna 1.
As shown in
As shown in
With reference to
In this embodiment, the radiating portion 21, the capacitance matching portion 22, the inductance matching portion 23, the feeding portion 24 and the grounding portion 25 are integrally formed. In addition, the radiating portion 21, the capacitance matching portion 22, the inductance matching portion 23, the feeding portion 24 and the grounding portion 25 are made of metal in this embodiment.
In addition, referring to
It is to be noted that the printed antenna 2 may work under different frequency bands, such as the frequency band with the specification of IEEE 802.11, IEEE802.15 or IEEE 802.16 or other frequently used frequency bands according to the actual design in which the dimension of each part or the angle is adjusted. Of course, the printed antenna 2 may be configured to work in the dual-band or multi-band mode according to the actual requirement, and detailed descriptions thereof will be omitted.
In addition, a printed antenna module of the invention will be described herein below. In the embodiment, the printed antenna module includes a plurality of radiating portions, a plurality of capacitance matching portions, a plurality of feeding portions, and a grounding portion. Herein, one radiating portions, one capacitance matching portions, one feeding portions, and the grounding portion may construct a printed antenna.
For example, as shown in
To be noted, the first printed antenna 3 and the second printed antenna 4 commonly have the grounding portion PG. In this embodiment, the first radiating portion 31, the first capacitance matching portion 32, the first inductance matching portion 33, and the first feeding portion 34 can be disposed at any corner of the grounding portion PG, and the second radiating portion 41, the second capacitance matching portion 42, the second inductance matching portion 43, and the second feeding portion 44 can be disposed at any other corner of the grounding portion PG. The inductance matching portion 33 or 43 of the printed antenna 3 or 4 may have a semi-circular shape, an arched shape or a horseshoe shape. The grounding portion PG is electrically connected with outer sides 311 and 411 of the radiating portions 31 and 41. The grounding portion PG and the outer side 311 of the radiating portion 31 form an angle, and the grounding portion PG and the outer side 411 of the radiating portion 41 also form an angle. In the embodiment, the angle(s) is ranged from 0 to 180 degrees. In addition, the grounding portion PG is further electrically connected with outer sides 321 and 421 of the capacitance matching portion 32 and 42. The grounding portion PG and the outer side 321 of the capacitance matching portions 32 form an angle, and the grounding portion PG and the outer side 421 of the capacitance matching portion 42 also form an angle. Herein, the angle(s) is ranged from 0 to 180 degrees. By this way, the signals can be received by the printed antenna module of the invention more reliable. Moreover, the transmitting and receiving power of the printed antenna module of the invention can be increased, and thus the communication quality can be enhanced.
In the embodiment, the second radiating portion 41, the second capacitance matching portion 42, the second inductance matching portion 43, and the second feeding portion 44 are arranged symmetrically to the first radiating portion 31, the first capacitance matching portion 32, the first inductance matching portion 33, and the first feeding portion 34, respectively.
As mentioned above, the printed antenna module MA is configured with the printed antennas 3 and 4 as shown in the previous embodiment, so the power gain thereof can be increased so as to enhance the communication quality.
Of course, it is to be noted that the printed antenna module MA of the invention is not restricted to the aspects of the above-mentioned embodiment (as shown in
Referring to
The structures and aspects of the third radiating portion 51, the third capacitance matching portion 52, the third inductance matching portion 53, the third feeding portion 54, the fourth radiating portion 61, the fourth capacitance matching portion 62, the fourth inductance matching portion 63, and the fourth feeding portion 64 are the same as those of the first radiating portion 31, the first capacitance matching portion 32, the first inductance matching portion 33, the first feeding portion 34, the second radiating portion 41, the second capacitance matching portion 42, the second inductance matching portion 43, and the second feeding portion 44, so the detailed descriptions thereof will be omitted. The third radiating portion 51, the third capacitance matching portion 52, the third inductance matching portion 53, the third feeding portion 54, the fourth radiating portion 61, the fourth capacitance matching portion 62, the fourth inductance matching portion 63 and the fourth feeding portion 64 are arranged symmetrically to the first radiating portion 31, the first capacitance matching portion 32, the first inductance matching portion 33, the first feeding portion 34, the second radiating portion 41, the second capacitance matching portion 42, the second inductance matching portion 43 and the second feeding portion 44, respectively. In this embodiment, the first radiating portion 31, first capacitance matching portion 32, first inductance matching portion 33, and first feeding portion 34 of the first printed antenna 3, the second radiating portion 41, second capacitance matching portion 42, second inductance matching portion 43, and second feeding portion 44 of the second printed antenna 4, the third radiating portion 51, third capacitance matching portion 52, third inductance matching portion 53, and third feeding portion 54 of the third printed antenna 5, and the fourth radiating portion 61, fourth capacitance matching portion 62, fourth inductance matching portion 63, and fourth feeding portion 64 of the fourth printed antenna 6 can be disposed at four corners of the grounding portion PG. The inductance matching portion 33, 43, 53 or 63 of the printed antenna 3, 4, 5 or 6 may have a semi-circular shape, an arched shape or a horseshoe shape. The grounding portion PG is electrically connected with outer sides 311, 411, 511 and 611 of the radiating portions 31, 41, 51 and 61. The grounding portion PG and each of the outer sides 311, 411, 511 and 611 form an angle, and the angle(s) is ranged from 0 to 180 degrees. In addition, the grounding portion PG is further electrically connected with outer sides 321, 421, 521 and 621 of the capacitance matching portions 32, 42, 52 and 62. The grounding portion PG and each of the outer sides 321, 421, 521 and 621 form an angle, and the angle(s) is ranged from 0 to 180 degrees. By this way, the signals can be received by the printed antenna module MA of the invention more reliable. Moreover, the transmitting and receiving power of the printed antenna module MA of the invention can be increased, and thus the communication quality can be enhanced.
In the embodiment, the number of the printed antennas in one printed antenna module MA is, but not limited to, 2 or 4. In practice, the number of the printed antennas can be determined according to the actual needs. Of course, the locations of the printed antennas are not limited to the corners of the grounding portion PG.
As mentioned above, the printed antenna 2 may be an antenna for a wireless communication system, a smart antenna system or a multi-input multi-output system.
In summary, the printed antenna and printed antenna module according to the invention have the grounding portion electrically connected with the outer side(s) of the inductance matching portion(s). In other words, the grounding portion is electrically connected with the radiating portion(s) and the capacitance matching portion(s) through the inductance matching portion(s). Compared with the conventional printed antenna, in which the grounding portion is only electrically connected with one end of the radiating portion, the electrical connection region between the grounding portion of the printed antenna and the inductance matching portion(s) in this invention is larger than that between the grounding portion of the printed antenna and one end of the radiating portion in prior art. Therefore, the power gain (with peak value of 5.15 dBi) of the printed antenna and printed antenna module of the invention is greater than the power gain (with peak value of 2 to 3 dBi) of the conventional printed antenna, and the communication quality can be enhanced.
Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to persons skilled in the art. It is, therefore, contemplated that the appended claims will cover all modifications that fall within the true scope of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 095137232 | Oct 2006 | TW | national |
| 200610137648.9 | Oct 2006 | CN | national |
