CN106450753A - Antenna structure and mobile terminal - Google Patents

Abstract

The invention discloses an antenna structure and a mobile terminal. Wherein, the antenna structure may include: a main board; a first antenna, the first antenna is connected to the main board through a first feed source; a second antenna, the second antenna is connected to the main board through a second feed source; The isolation area between the first feed source and the second feed source; the first resonance module arranged in the isolation area, and the first resonance module cooperates with the isolation area to improve the isolation between the first antenna and the second antenna. The antenna structure can improve the isolation between the first antenna and the second antenna, effectively reduce the communication interference between the antennas in the mobile terminal, and improve the isolation effect of antenna interference.

Description

Antenna structure and mobile terminal

technical field

The invention relates to the field of mobile terminal manufacturing, in particular to an antenna structure and a mobile terminal with the antenna structure.

Background technique

With the rapid development of mobile terminal technology, more and more users require the mobile terminal to be more miniaturized for portability. Due to the trend of miniaturization of mobile terminals, the distance between the antennas in the mobile terminal will become closer and closer, which will make the signal interference between antennas of different frequencies or similar frequencies more and more serious. In severe cases, it will affect the wireless performance of the whole machine. However, under the trend of miniaturization and integration of mobile terminals, the traditional method of increasing antenna distance and changing antenna routing has been unable to be realized. Therefore, how to improve the isolation between the antennas in the mobile terminal and effectively reduce the signal interference between the antennas has become an urgent problem to be solved.

Contents of the invention

The object of the present invention is to solve one of the above-mentioned technical problems at least to a certain extent.

For this reason, the first object of the present invention is to propose an antenna structure. The antenna structure can improve the isolation between the first antenna and the second antenna, effectively reduce the communication interference between the antennas in the mobile terminal, and improve the isolation effect of the antenna interference.

A second object of the present invention is to propose a mobile terminal.

To achieve the above purpose, the antenna structure of the embodiment of the first aspect of the present invention includes: a main board; a first antenna, the first antenna is connected to the main board through a first feed source; a second antenna, the second antenna is connected to the main board through The second feed is connected to the main board; an isolation area disposed on the main board and between the first feed and the second feed; a first resonance disposed in the isolation area module, the first resonant module cooperates with the isolation area to improve the isolation between the first antenna and the second antenna.

According to the antenna structure of the embodiment of the present invention, by setting an isolation area on the main board and between the feed sources of the first antenna and the second antenna, and setting a first resonant module in the isolation area, the first A resonant module can cooperate with the isolation area to improve the isolation between the first antenna and the second antenna. In this way, the first resonant module can improve the isolation between the first antenna and the second antenna, effectively reducing the distance between the antennas in the mobile terminal. Communication interference between antennas improves the isolation effect of antenna interference.

According to an embodiment of the present invention, both the first antenna and the second antenna are located on the top of the main board.

According to an embodiment of the present invention, the first resonance module includes an LC resonance circuit.

According to an embodiment of the present invention, the position of the first resonance module is above the shortest path between the first feed source and the second feed source.

According to an embodiment of the present invention, the antenna structure further includes: a second resonant module, the first end of the second resonant module is connected to the second feed source, and the second end of the second resonant module is grounded ; a filter, the first end of the filter is connected to the first antenna, and the second end of the filter is connected to the first feed source.

According to an embodiment of the present invention, the filter is a surface acoustic filter.

According to an embodiment of the present invention, the first antenna is a GPS antenna, and the second antenna is an LTE communication antenna.

According to an embodiment of the present invention, the isolation between the first antenna and the second antenna is adjusted according to the width of the isolation region and the L/C value in the LC resonant circuit.

To achieve the above purpose, the mobile terminal of the embodiment of the second aspect of the present invention includes: the antenna structure described in the embodiment of the second aspect of the present invention.

According to the mobile terminal of the embodiment of the present invention, by setting an isolation area on the main board and between the feed sources of the first antenna and the second antenna, and setting a first resonant module in the isolation area, the first A resonant module can cooperate with the isolation area to improve the isolation between the first antenna and the second antenna. In this way, the first resonant module can improve the isolation between the first antenna and the second antenna, effectively reducing the distance between the antennas in the mobile terminal. Communication interference between antennas improves the isolation effect of antenna interference.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

FIG. 1 is a schematic structural diagram of an antenna structure according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of an antenna structure according to another embodiment of the present invention.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The antenna structure of the embodiment of the present invention and a mobile terminal having the antenna structure are described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an antenna structure according to an embodiment of the present invention. As shown in FIG. 1 , the antenna structure 100 may include: a main board 110 , a first antenna 120 , a second antenna 130 , an isolation area 140 and a first resonance module 150 . Preferably, in an embodiment of the present invention, the first antenna 120 and the second antenna 130 can be located on the top of the main board 110 . Thus, by arranging the first antenna 120 and the second antenna 130 on the top of the motherboard 110, the first antenna 120 and the second antenna 130 are arranged on the top of the mobile terminal, preventing the user from affecting the first antenna when holding the mobile terminal. and second antenna signal.

Wherein, as shown in FIG. 1 , the first antenna 120 may be connected to the main board 110 through a first feed 121 . The second antenna 130 can be connected to the main board 110 through a second feed 131 . The isolation region 140 can be disposed on the main board 110 and between the first feed source 121 and the second feed source 131 . The first resonant module 150 can be disposed in the isolation area 140 , and the first resonant module 150 can cooperate with the isolation area 140 to improve the isolation between the first antenna 120 and the second antenna 130 .

It should be noted that the first feed source 121 and the second feed source 131 are located on the main board 110 respectively. Among them, the first feed source 121 is the primary radiator of the main and secondary reflectors of the excitation surface antenna, and is an important device that determines the electrical characteristics and frequency band of the first antenna 120. It is used to reflect the radio frequency power from the feeder in the form of electromagnetic waves. Radiation from surfaces or lenses, etc., so that it can produce a suitable field distribution on the aperture to form the required sharp beam or shaped beam; at the same time, the power leaked from the edge of the reflective surface or lens to the outside should be as small as possible, in order to achieve as much as possible high gain. It can be understood that the function of the second feed source 131 is similar to that of the first feed source 121, the difference is that the second feed source 131 acts on the second antenna 130, and the first feed source 121 acts on the second antenna 130 on an antenna 120 .

In order to improve the isolation between the first antenna and the second antenna, and effectively solve the problem of mutual interference between the two antennas, the present invention can dig out the ground between the first feed source 121 and the second feed source 131 a slot, and use this slot as an isolation region 140 between the first feed source 121 and the second feed source 131, and set the first resonant module 150 in the isolation region 140, and the position of the first resonant module 150 can be Located on the shortest path between the first feed source 121 and the second feed source 131 , wherein the first resonance module 150 can be connected in series between the first feed source 121 and the second feed source 131 . In addition, the first resonant module 150 may include an LC resonant circuit, and the LC resonant circuit may be a series LC resonant circuit. Thus, the resonant frequency is generated by the first resonant module 150, for example, a resonant current can be generated to interfere with the current generated by the first antenna 120 and the second antenna 130 on the motherboard, so that the first antenna 120 and the second antenna 130 can be enlarged. The isolation between the antennas can be realized in the smallest space possible by disposing the first resonant module 150 on the shortest path between the first feed source 121 and the second feed source 131 .

In order to further reduce communication interference between antennas, further, in an embodiment of the present invention, as shown in FIG. 2 , on the basis of that shown in FIG. 1 , the antenna structure 100 may further include: a second resonance module 160 and filter 170 . Wherein, as shown in FIG. 2 , the first end of the second resonant module 160 is connected to the second feed source 131 , and the second end of the second resonant module 160 is grounded. A first end of the filter 170 is connected to the first antenna 120 , and a second end of the filter 170 is connected to the first feed source 121 . Wherein, in an embodiment of the present invention, the filter 170 may be a surface acoustic filter.

Specifically, a second resonance module 160 may be connected in parallel to the second feed source 131 of the second antenna 130, wherein the first end of the second resonance module 160 is connected to the second feed source 131, and the second resonance module 160 The second end of the second terminal is grounded, and the second resonant module 160 may include an LC resonant circuit, and the LC resonant circuit may be a series resonant circuit. A surface acoustic filter (usually abbreviated as SAW) with high rejection is connected in series on the receiving path of the first antenna 120 . In this way, by utilizing the characteristics of the second resonance module and the SAW filter, the mutual interference between the first antenna and the second antenna can be greatly improved, and the interference-free work between different antennas in a small space on the mobile terminal can be realized .

It can be understood that the antenna structure in this embodiment of the present invention can be applied to any type of antenna. Preferably, the antenna structure in this embodiment of the present invention is more suitable for antenna layouts belonging to the same or similar frequency bands: as an example, the first antenna 120 It may be a GPS antenna, and the second antenna 130 may be an LTE communication antenna.

Wherein, in one embodiment of the present invention, the LC resonant circuit in the above-mentioned first resonant module 150 can be a lumped parameter device or a distributed parameter device, and the characteristics of the LC can be used to select an appropriate L/C value to improve the first The isolation between one antenna and the second antenna. Preferably, in an embodiment of the present invention, the isolation between the first antenna 120 and the second antenna 130 can be adjusted according to the width of the isolation region 140 and the L/C value in the LC resonant circuit.

More specifically, the isolation between antennas can be effectively improved by adjusting the width of the appropriate isolation region 140, selecting an appropriate L/C value, and properly adjusting the bridging position of the LC resonant circuit in the first resonant module 150. Spend.

According to the antenna structure of the embodiment of the present invention, by setting an isolation area on the main board and between the feed sources of the first antenna and the second antenna, and setting a first resonant module in the isolation area, the first A resonant module can cooperate with the isolation area to improve the isolation between the first antenna and the second antenna. In this way, the first resonant module can improve the isolation between the first antenna and the second antenna, effectively reducing the distance between the antennas in the mobile terminal. Communication interference between antennas improves the isolation effect of antenna interference.

In order to realize the above embodiments, the present invention also proposes a mobile terminal, which may include the antenna structure described in any one of the above embodiments of the present invention.

According to the mobile terminal of the embodiment of the present invention, by setting an isolation area on the main board and between the feed sources of the first antenna and the second antenna, and setting a first resonant module in the isolation area, the first A resonant module can cooperate with the isolation area to improve the isolation between the first antenna and the second antenna. In this way, the first resonant module can improve the isolation between the first antenna and the second antenna, effectively reducing the distance between the antennas in the mobile terminal. Communication interference between antennas improves the isolation effect of antenna interference.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "width", "upper", "lower", "top", "bottom", "inner" and "outer" are based on the drawings. The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the scope of the present invention. limit.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (9)

1. An antenna structure, characterized in that, comprising: motherboard; a first antenna, the first antenna is connected to the main board through a first feed; a second antenna, the second antenna is connected to the main board through a second feed; an isolation area disposed above the main board and between the first feed and the second feed; The first resonant module arranged in the isolation area, the first resonant module cooperates with the isolation area to improve the isolation between the first antenna and the second antenna. 2. The antenna structure according to claim 1, wherein the first antenna and the second antenna are both located on the top of the main board. 3. The antenna structure according to claim 1, wherein the first resonant module comprises an LC resonant circuit. 4. The antenna structure according to claim 1, wherein the first resonant module is located above the shortest path between the first feed source and the second feed source. 5. The antenna structure according to claim 1, further comprising: a second resonance module, the first end of the second resonance module is connected to the second feed source, and the second end of the second resonance module is grounded; A filter, the first end of the filter is connected to the first antenna, and the second end of the filter is connected to the first feed source. 6. The antenna structure according to claim 5, wherein the filter is an acoustic surface filter. 7. The antenna structure according to claim 1, wherein the first antenna is a GPS antenna, and the second antenna is an LTE communication antenna. 8. The antenna structure according to claim 3, wherein the isolation between the first antenna and the second antenna is based on the width of the isolation region and the L/C value in the LC resonant circuit Make adjustments. 9. A mobile terminal, comprising the antenna structure according to any one of claims 1-8.