Patent Application
20160126620
The subject matter herein generally relates to an antenna assembly, and particularly relates to a coupled antenna assembly and a wireless communication device having the antenna assembly.
Most wireless communication devices may use a Bluetooth® antenna and a Wireless Fidelity (Wi-Fi) antenna for transmitting and receiving different wireless signals, respectively. This complicated structure makes in difficult to design smaller size to meet a miniaturization trend of the wireless communication devices.
Implementations of the present technology will now be described, by way of example only, with reference to the attached figures.
It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure.
The term “comprising,” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like.
The base board 10 is substantially a rectangular printed circuit board (PCB) with a size of 131.6×66.8×10 mm3 in at least one embodiment. A clearance zone 11 is defined above a portion of the base board 10 with a size of 66.8×7 mm2 for decreasing external affection to the antenna assembly 40 and electronic components of the base board 10. In addition, the base board 10 can further includes a matching circuit (not shown) arranged in the clearance zone 11 and electrically connected to the antenna assembly 40 via cables for providing impedance matching for the antenna assembly 40. The matching circuit can be a traditional it type circuit or a traditional T type circuit.
The antenna assembly includes an elastic piece 41, a first radiating portion 42, a second radiating portion 43, and a connecting portion 44. The first radiating portion 42, the second radiating portion 43, and the connecting portion 44 can be made by bending a flexible circuit board. The elastic piece 41 is substantially V-shaped and made of metal by bending. The elastic piece 41 includes a first bending portion 411 and a second bending portion 412 crookedly connected to the first bending portion 411. The first radiating section 421 and the second radiating section 422 are arranged on the top wall 211 and spaced from each other. The first radiating portion 42 is substantially L-shaped and includes a first radiating section 421 and a second radiating section 422. The first radiating section 421 is perpendicularly coupled to the second radiating section 422 and coplanar with the second radiating section 422. The first bending portion 411 is coupled to the second radiating section 422. The first radiating section 421 includes a first end 4211, a second end 4212, and a gap 4213 formed between the first end 4211 and the second end 4212. In at least one embodiment, a resistor 4214 of 50 ohm is received in the gap 4213 and electrically connected to the first end 4211 and the second end 4212.
The second radiating portion 43 includes a first extending section 431 and a second extending section 432 perpendicularly coupled to the first extending section 431. The first extending section 431 is paralleled to the first radiating section 421 and has a greater length than the first radiating section 421. The first extending section 431 is coplanar with the first radiating portion 42. A plane of the second extending section 432 is perpendicular to a plane of the first extending section 431. The first extending section 431 is coupled to the ground point 444. An end of the second extending section 432 is perpendicularly coupled to the first extending section 431, and the other end extends over the second radiating section 422. The second extending section 432 is perpendicular to the top wall 211 to increase an efficiency of the antenna assembly 40 at a frequency of about 2,400 MHz. In at least one embodiment, the first radiating section 421, the second radiating section 422, and the first extending section 431 can be pasted on the top wall 211.
The connecting portion 44 is substantially L-shaped and made of conductive material. The connecting portion 44 includes a first connecting section 441 and a second connecting section 442 perpendicularly coupled to the first connecting section 441. The first connecting section 441 is sandwiched between the sidewall 212 and a side of the base board 10. The first connecting section 441 includes a feeding point 443 and a ground point 444. The first end 4211 of the first radiating section 421 is electrically connected to the feeding portion 443. An end of the first extending section 431 is electrically connected to the ground point 444. The second connecting section 442 is parallel to the top wall 211 to partially cover the receiving space 21. The second connecting section 442 is configured to support the connector 30 and electrically connected to the connector 30, and further transmits signals between the connector 30 and the base board 10.
A table 1 is presented as below, the table 1 illustrates that a preferable radiating efficiency of the antenna assembly 40, which can satisfy working requirements of the antenna assembly 40.
The antenna assembly 40 and the connector 30 is tightly arranged to each other via the support member 20, the decreased size allows employment in a miniaturized wireless communication device 100. In addition, the elastic piece 41 is coupled to the first radiating portion 42 and spaced away from the connector 30, which increases a height of the antenna assembly 40 and increases a frequency width for high frequency. A length of the elastic piece 41 increase a length of the current path, which may help to shift to low frequency of the wireless signals transmitted and received by the antenna assembly 40.
It is believed that the embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the scope of the disclosure or sacrificing all of its advantages, the examples hereinbefore described merely being illustrative embodiments of the disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201410600735.8 | Oct 2014 | CN | national |
