CN202524380U

CN202524380U - Multi-band antenna and mobile terminal thereof

Info

Publication number: CN202524380U
Application number: CN201220193144XU
Authority: CN
Inventors: 晏胜
Original assignee: Huaqin Telecom Technology Co Ltd
Current assignee: Huaqin Telecom Technology Co Ltd; Huaqin Technology Co Ltd
Priority date: 2012-04-28
Filing date: 2012-04-28
Publication date: 2012-11-07
Anticipated expiration: 2022-04-28

Abstract

The utility model discloses a multi-band antenna and a mobile terminal thereof. The mobile terminal comprises an FM (frequency modulation) module, a CMMB (China mobile multimedia broadcasting) module, an antenna, a change-over switch, an FM matching circuit, a CMMB matching circuit and a processor, wherein the FM matching circuit is used for matching with the impedances of the antenna and the FM module, the CMMB matching circuit is used for matching with the impedances of the antenna and the CMMB module, the antenna is used for receiving FM signals or CMMB signals, and the processor is used for controlling the change-over switch to change over the connection between the FM matching circuit and the antenna or the connection between the CMMB matching circuit and the antenna. According to the utility model, the impedance matching of different signals is realized through adopting a built-in antenna which can receive CMMB signals and FM signals and the change-over switch, so that while the receiving of CMMB signals and FM signals is realized, the number of the antenna of the mobile terminal is reduced, the stacking size is reduced, and the function expansion (for example, increasing a sound cavity of a loudspeaker or setting NFC (near field communication) antennas, and the like) of a complete machine on a mainboard is improved.

Description

Multiband aerial and portable terminal thereof

Technical field

The utility model relates to a kind of multiband aerial and portable terminal thereof, particularly relates to the multiband aerial of a kind of CMMB of being applicable to (China Mobile multimedia broadcasting) signal and FM (frequency modulation(FM)) signal and uses the portable terminal of said multiband aerial.

Background technology

Along with the development of mobile communication technology, portable terminal has become the necessity of people's daily life.Recreational and the convenience of portable terminal also more and more receives the concern of terminal user, and the use of CMMB on portable terminal also constantly popularized.

Yet; Because the bandwidth of CMMB antenna is big (474MHz-794MHz) very; So antenna volume is very big, and the headroom that needs is also very big, so the portable terminal major part of existing band CMMB all is to realize the receiving function of CMMB signal through the mode of pull bar or earphone antenna.Existing in addition FM antenna also need adopt the receiving function of the realization FM signal of earphone antenna.And it is more and more at present mobile terminal function; Under the situation that portable terminal more and more approaches; Said CMMB antenna or FM antenna can only be selected outer Drag link antenna or earphone antenna under the overwhelming majority situation, so so in existing portable terminal the unusual inconvenience of the use of CMMB antenna or FM antenna.If the CMMB antenna also uses earphone antenna also can conflict with the FM antenna, so also can't CMMB antenna and FM antenna be integrated in the same portable terminal this moment.

In addition; Mobile terminal function is more and more at present; So the antenna in the portable terminal is also more and more, for example main antenna, Bluetooth antenna, WIFI (wireless compatibility authentication) antenna and GPS (global positioning system) antenna etc., the main antenna of portable terminal generally can be arranged at the lower end of mainboard in portable terminal; Gps antenna can be in portable terminal corner, upper end of mainboard; The side of Bluetooth antenna and WIFI antenna mainboard in portable terminal if add the CMMB function this moment, can be placed on another corner, upper end of mainboard in the portable terminal.Like this if adopt the FM built-in aerial just not have the place to place.If the FM built-in aerial is arranged on the mainboard will occupies the space that other functions occupy by force on mainboard.

The utility model content

The technical problem that the utility model will solve is in order to overcome when adopting CMMB antenna and FM antenna in the prior art respectively, to take the defective of too much stack size, providing a kind of.

The utility model solves above-mentioned technical problem through following technical proposals:

The utility model provides a kind of multiband aerial; Comprise a FM module and a CMMB module, be characterized in that said multiband aerial also comprises: an antenna, switches switch, be used to mate the impedance of said antenna and FM module a FM match circuit, be used to mate the impedance one CMMB match circuit and a processor of said antenna and CMMB module;

Wherein said antenna is used to receive FM signal or CMMB signal, and said processor is used for control its switch and switches between said FM match circuit and the antenna conducting between conducting or said CMMB match circuit and the antenna.

Preferably, said FM match circuit and CMMB match circuit are π type match circuit, L type match circuit, T type match circuit, double L-shaped match circuit or two π type match circuit.

Preferably, said multiband aerial also comprises an auxiliary matched circuit that is serially connected with between said diverter switch and the said antenna, and said auxiliary matched circuit and FM match circuit mate the impedance of said FM module and said antenna;

Said auxiliary matched circuit also matees the impedance of said CMMB module and said antenna with the CMMB match circuit.

Preferably, said auxiliary matched circuit is π type match circuit, L type match circuit, T type match circuit, double L-shaped match circuit or two π type match circuit.

Preferably, said multiband aerial also comprises one first filtration module that is serially connected with between said FM match circuit and the said FM module, is used for the noise jamming that the said FM module of filtering receives signal.

Preferably, said multiband aerial also comprises one second filtration module that is serially connected with between said CMMB match circuit and the said CMMB module, is used for the noise jamming that the said CMMB module of filtering receives signal.

Preferably, said antenna is FPC antenna or ceramic antenna.But also can be according to user's design demand other kinds of employing or the antenna of type.

The utility model also provides a kind of portable terminal, is characterized in comprising aforesaid multiband aerial.

Preferably, said portable terminal also comprises a mainboard, and said antenna is arranged at said mainboard, and the headroom area that said mainboard is provided with said antenna place is 200mm ²To 300mm ²

Preferably, said antenna is arranged at the side or the edge of said mainboard.Thereby between the minimizing antenna or the phase mutual interference between other elements on the mainboard.

The positive progressive effect of the utility model is:

In the utility model through adopting the built-in aerial can accept CMMB signal and FM signal; And pass through the impedance matching that diverter switch realizes unlike signal, thereby when realizing receiving CMMB signal and FM signal, reduced the quantity of antenna in the portable terminal; Thereby reduced stack size; Improved complete machine function expansion on the mainboard, for example increased the sound chamber of loudspeaker or the size of loudspeaker, NFC (near field communication (NFC)) antenna etc. perhaps has been set.

Description of drawings

Fig. 1 is the sketch map of first embodiment of the multiband aerial of the utility model.

Fig. 2 is the sketch map of second embodiment of the multiband aerial of the utility model.

Fig. 3 is the sketch map of the 3rd embodiment of the multiband aerial of the utility model.

Embodiment

Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to specify the technical scheme of the utility model.

First embodiment:

As shown in Figure 1, comprise in the multiband aerial of present embodiment that a FM module 1, a CMMB module 2, an antenna 3, switch switch 4, a FM match circuit 11, a CMMB match circuit 21 and a processor 5.

A FM module 1 described in the present embodiment and a CMMB module 2 are to gather and handle the general-purpose chip or the module of FM signal and CMMB signal in the prior art, so no longer at length give unnecessary details said FM module 1 and CMMB module 2 here.

Antenna described in the present embodiment 3 is used for receiving the FM signal or the CMMB signal in said multiband aerial space of living in, and said antenna 3 can adopt FPC (flexible printed circuit board) antenna or ceramic antenna etc.

Said FM match circuit 11 is connected with said antenna 3 through diverter switch 4; Said FM match circuit 11 also is electrically connected with said FM module 1; So when between said antenna 3 and the said FM module 1 through said diverter switch 4 during with 11 conductings of FM match circuit; Said FM match circuit 11 matees the impedance of said antenna 3 and FM module 1, thereby improves the power maximum of the FM signal of said FM module 1 reception.Wherein based on design demand; The said FM match circuit 11 of present embodiment is except can adopting the double L-shaped match circuit shown in Fig. 1; Can also adopt outside π type match circuit, L type match circuit or the T type match circuit, but also can adopt match circuit such as two π type match circuits further.

In like manner said CMMB match circuit 21 is connected with said antenna 3 through diverter switch 4; Said CMMB match circuit 21 also is electrically connected with said CMMB module 2; So when between said antenna 3 and the said CMMB module 2 through said diverter switch 4 during with 21 conductings of CMMB match circuit; Said CMMB match circuit 21 matees the impedance of said antenna 3 and CMMB module 2, thereby improves the power maximum of the CMMB signal of said CMMB module 2 receptions.So the match circuit of CMMB described in the present embodiment 21 except can adopting the double L-shaped match circuit shown in Fig. 1, also can adopt match circuits such as π type match circuit, L type match circuit, T type match circuit or two π type match circuits.

Diverter switch described in the present embodiment 4 is used to switch between said FM match circuit 11 and the antenna 3 conducting between conducting or said CMMB match circuit 21 and the antenna 3; Thereby realize that through switching way the FM signal receives and the CMMB signal receives, and the user can be through said diverter switch 4 change actions of said processor 5 controls in the present embodiment.

So in the present embodiment; The user switches between said FM match circuit 11 and the antenna 3 conducting between conducting or said CMMB match circuit 21 and the antenna 3 through the said diverter switch 4 of said processor 5 controls; Thereby make said FM signal that antenna 3 receives or CMMB signal through with the FM match circuit 11 or the CMMB match circuit 21 of said

FM module

1 or 2 impedance matchings of CMMB module, make said FM module 1 receive the FM signal or make said CMMB module 2 receive the CMMB signal.

In addition; When the multiband aerial of present embodiment is applied to a portable terminal; Can the antenna 3 of present embodiment be arranged on the mainboard of said portable terminal, especially consider crosstalking each other of possibly existing between each device on the mainboard of portable terminal, said antenna 3 preferably is arranged on the side or corner of said mainboard; And said antenna 3 tops need the headroom area of 200mm2 at least, and preferably said headroom area is at 200mm ²To 300mm ²Between, and need pile up space or structural form according to antenna and confirm that said antenna 3 uses FPC antennas or ceramic antenna etc.

Second embodiment:

As shown in Figure 2, the difference of the multiband aerial of the multiband aerial of present embodiment and first embodiment is:

The multiband aerial of present embodiment also comprises an auxiliary matched circuit 6, and said auxiliary matched circuit 6 matees the impedance of said FM module 1 and said antenna 3 with FM match circuit 11 jointly; Said auxiliary matched circuit 6 can also mate the impedance of said CMMB module 2 and said antenna 3 with CMMB match circuit 21 jointly.

The circuit 6 of auxiliary matched described in the present embodiment is as shown in Figure 2, also is double L-shaped match circuit, and said in addition auxiliary matched circuit 6 can also be match circuits such as π type match circuit, L type match circuit, T type match circuit or two π type match circuits.

So in the present embodiment; The user switches between said FM match circuit 11 and the antenna 3 conducting between conducting or said CMMB match circuit 21 and the antenna 3 through the said diverter switch 4 of said processor 5 controls; The said FM signal that makes antenna 3 receive passes through

FM match circuit

11 and 6 common and said FM module 1 impedance matchings of auxiliary matched circuit, thereby makes said FM module 1 receive the FM signal.The said CMMB signal that perhaps makes antenna 3 receive passes through

CMMB match circuit

21 and 6 common and said CMMB module 2 impedance matchings of auxiliary matched circuit, thereby makes said CMMB module 2 receive the CMMB signal.

The 3rd embodiment:

As shown in Figure 3, the difference of the multiband aerial of the multiband aerial of present embodiment and second embodiment is:

The multiband aerial of present embodiment also comprises one first filtration module 7 and one second filtration module 8, and wherein said first filtration module 7 is used for the noise jamming that the said FM module 1 of filtering receives signal.Said second filtration module 8 is used for the noise jamming that the said CMMB module 2 of filtering receives signal.

So in the present embodiment, receive in the process of FM signal or CMMB signal the noise jamming in said first filtration module 7 or said FM signal of second filtration module, 8 filterings or the CMMB signal in said FM module 1 or CMMB module 2.

Though more than described the embodiment of the utility model, it will be understood by those of skill in the art that these only illustrate, the protection range of the utility model is limited appended claims.Those skilled in the art can make numerous variations or modification to these execution modes under the prerequisite of principle that does not deviate from the utility model and essence, but these changes and modification all fall into the protection range of the utility model.

Claims

1. multiband aerial; Comprise a FM module and a CMMB module; It is characterized in that said multiband aerial also comprises: an antenna, switches switch, be used to mate the impedance of said antenna and FM module a FM match circuit, be used to mate a CMMB match circuit and a processor of the impedance of said antenna and CMMB module;

2. multiband aerial as claimed in claim 1 is characterized in that, said FM match circuit and CMMB match circuit are π type match circuit, L type match circuit, T type match circuit, double L-shaped match circuit or two π type match circuit.

3. multiband aerial as claimed in claim 1; It is characterized in that; Said multiband aerial also comprises an auxiliary matched circuit that is serially connected with between said diverter switch and the said antenna, and said auxiliary matched circuit and FM match circuit mate the impedance of said FM module and said antenna;

4. multiband aerial as claimed in claim 3 is characterized in that, said auxiliary matched circuit is π type match circuit, L type match circuit, T type match circuit, double L-shaped match circuit or two π type match circuit.

5. multiband aerial as claimed in claim 1 is characterized in that, said multiband aerial also comprises one first filtration module that is serially connected with between said FM match circuit and the said FM module, is used for the noise jamming that the said FM module of filtering receives signal.

6. multiband aerial as claimed in claim 1; It is characterized in that; Said multiband aerial also comprises one second filtration module that is serially connected with between said CMMB match circuit and the said CMMB module, is used for the noise jamming that the said CMMB module of filtering receives signal.

7. like each described multiband aerial among the claim 1-6, it is characterized in that said antenna is FPC antenna or ceramic antenna.

8. a portable terminal is characterized in that, comprises like each described multiband aerial among the claim 1-7.

9. portable terminal as claimed in claim 8 is characterized in that said portable terminal also comprises a mainboard, and said antenna is arranged at said mainboard, and the headroom area that said mainboard is provided with said antenna place is 200mm ²To 300mm ²

10. portable terminal as claimed in claim 9 is characterized in that, said antenna is arranged at the side or the edge of said mainboard.