Patent Grant
11024964
The present disclosure relates to the field of antenna technologies, and in particular, to an antenna system and a mobile terminal.
In wireless communication devices, there is always a device that radiates electromagnetic energy into space and receives electromagnetic energy from space, and this device is an antenna. The role of the antenna is to transmit a digital or analog signal modulated onto a radio frequency (RF) frequency to a spatial wireless channel, or to receive a digital or analog signal modulated onto a RF frequency from a spatial wireless channel.
Metal frame architectures are mainstream solutions in the mobile phone structure design, which can provide the better protection, aesthetics, thermal diffusion and user experience. However, due to the shielding effect of metal on electromagnetic waves, radiation performance of an antenna will be seriously affected and the gain of the antenna will be reduced.
Therefore, it is necessary to provide a new antenna system to solve the above problems.
Many aspects of the exemplary embodiment can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
The present disclosure will be further illustrated with reference to the accompanying drawings and the embodiments.
Referring to
The antenna unit 3 is connected to the radio frequency feeding source 21 and arranged to be coupled to the radiation frame 10 to serve as a primary radiator of medium-high frequency.
The tunable capacitor 22 is connected to the radiation frame 10. Specifically, the tunable capacitor 22 is connected in series between the radiation frame 10 and the system ground, and the metal back shell 1 can be used as the system ground, such that an electrical length of the antenna system 100 can be changed by switching to different capacitances of the tunable capacitor 22, thereby achieving that the radiation frequency of the antenna system 100 covers 790-960 MHz and 1710-2690 MHz. In a preferred embodiment of the present disclosure, the tunable capacitor 22 has a capacitance ranging from 0.75 pF to 3.1 pF. Depending on different capacitances, the antenna system 100 will operate in different bands, i.e., the antenna system 100 operates in different states.
A case where the antenna system 100 operates in seven different states is taken as an example for detailed description. Refer to Table 1 below for details.
As can be seen from the above Table 1, operating bands of the antenna system 100 can be switched simply by tuning the capacitance of the tunable capacitor 22. That is, the antenna system 100 can operate in different bands by selecting different states. Refer to
In fact, the tunable capacitor 22 has various states, and the antenna system 100 provided by the present disclosure may have 32 different states, as shown in Table 2.
As can be seen from Table 2, the tunable capacitor 22 can select the operating state of the antenna system 100 simply by changing the capacitance. Without doubt, the number of the states of the antenna system 100 is not limited to 7 in the present disclosure, and in other embodiments, different capacitances and different numbers of states may be selected.
The present disclosure also provides a mobile terminal, and the mobile terminal includes the antenna system 100 described above.
Compared with the related art, the antenna system 100 provided by present disclosure, by providing the tunable capacitor 22 as a tuner of the antenna system 100, not only can achieve that the radiation frequency of the antenna system 100 covers 790-960 MHz and 1710-2690 MHz, but also has good radiation performance.
What has been described above is only an embodiment of the present disclosure, and it should be noted herein that one ordinary person skilled in the art can make improvements without departing from the inventive concept of the present disclosure, but these are all within the scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201810875750.1 | Aug 2018 | CN | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 20120009983 | Mow | Jan 2012 | A1 |
| Number | Date | Country | |
|---|---|---|---|
| 20200044340 A1 | Feb 2020 | US |
