CN107611565A - A kind of GPS WIFI antennas and mobile terminal - Google Patents

Abstract

The present invention provides a GPS-WIFI antenna and a mobile terminal. A first resonant arm and a second resonant arm coupled with the first resonant arm are separated on the metal shell of the mobile terminal. The GPS-WIFI antenna includes a first The resonant arm, the second resonant arm and the feed circuit, the first connection point where the feed circuit is connected to the first resonant arm is located between the midpoint of the first resonant arm and the end of the first resonant arm close to the second resonant arm . In this way, a relatively independent dual-band radiation antenna structure is formed by the first resonant arm and the second resonant arm, and by directly adjusting the length of the resonant arm, setting the position of the first connection point where the feed circuit is connected to the first resonant arm and other factors , under the condition of satisfying the metal shape, to realize GPS and WIFI common type antenna, and the matching circuit is simple, the radiation efficiency of the antenna is high, and the bandwidth is excellent.

Description

A GPS-WIFI antenna and mobile terminal

technical field

The invention relates to the technical field of antennas, in particular to a GPS-WIFI antenna and a mobile terminal.

Background technique

With the development and progress of science and technology, communication technology has developed rapidly and made great progress, and the popularity of mobile terminals has reached an unprecedented height. More and more mobile terminals have become an indispensable part of people's lives. At the same time, users The types of functions and performance requirements of mobile terminals are getting higher and higher, such as audio functions, camera functions, camera functions, and fast charging functions, etc., have become essential functions of smart terminals or mobile terminals.

As the functions of mobile terminals become more and more perfect, the appearance and texture of mobile terminals have become the aspects pursued by users, and mobile terminals with metal shells have been favored by more and more users due to their excellent metal texture. However, with the increasing demand for metal texture of the mobile terminal shell and the requirements for stable and reliable antennas, the common design of GPS-WIFI antennas generally uses U-shaped or linear metal gap designs, with multiple matching circuits or The realization of matching devices etc. leads to large matching loss of GPS-WIFI antenna, complex matching circuit and low antenna efficiency.

Contents of the invention

Embodiments of the present invention provide a GPS-WIFI antenna and a mobile terminal to solve the problems of large matching loss of the GPS-WIFI antenna, complex matching circuits, and low antenna efficiency in existing mobile terminals.

An embodiment of the present invention provides a GPS-WIFI antenna, which is applied to a mobile terminal with a metal casing, the metal casing is provided with a gap, and the metal casing is separated to form a first A resonant arm and a second resonant arm coupled with the first resonant arm, the GPS-WIFI antenna includes the first resonant arm, the second resonant arm and a feed circuit, and the feed circuit is connected to Between the first connection point of the first resonant arm and the ground terminal, the first connection point is located between the midpoint of the first resonant arm and the end of the first resonant arm close to the second resonant arm between.

The embodiment of the present invention also provides a mobile terminal, the mobile terminal includes a GPS-WIFI antenna and a metal casing, the metal casing is provided with a gap, and the metal casing is separated to form a The first resonant arm and the second resonant arm coupled with the first resonant arm, the GPS-WIFI antenna includes the first resonant arm, the second resonant arm and a feed circuit, the feed circuit Connected between the first connection point of the first resonant arm and the ground terminal, the first connection point is located between the midpoint of the first resonant arm and the first resonant arm close to the second resonant arm between the ends.

In the GPS-WIFI antenna and mobile terminal provided by the embodiments of the present invention, a first resonant arm and a second resonant arm coupled with the first resonant arm are separated on the metal casing of the mobile terminal, and the GPS-WIFI antenna includes a second resonant arm A resonant arm, a second resonant arm and a feed circuit, the first connection point between the feed circuit and the first resonant arm is located between the midpoint of the first resonant arm and the end of the first resonant arm close to the second resonant arm between. In this way, a relatively independent dual-band radiation antenna structure is formed by the first resonant arm and the second resonant arm, and by directly adjusting the length of the resonant arm, setting the position of the first connection point where the feed circuit is connected to the first resonant arm and other factors , under the condition of satisfying the metal shape, to realize GPS and WIFI common type antenna, and the matching circuit is simple, the radiation efficiency of the antenna is high, and the bandwidth is excellent.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a perspective view of a mobile terminal provided by an embodiment of the present invention;

FIG. 2 is a plan view of the metal casing of the mobile terminal shown in FIG. 1;

FIG. 3 is a plan view of another metal casing of a mobile terminal provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of the GPS-WIFI antenna of the mobile terminal shown in FIG. 1 .

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Please refer to Figure 1, Figure 2 and Figure 3, Figure 1 is a perspective view of the mobile terminal provided by the embodiment of the present invention, Figure 2 is a plan view of the metal casing of the mobile terminal shown in Figure 1, and Figure 3 is the embodiment of the present invention A plan view of another metal casing of a mobile terminal is provided. As shown in Figures 1 to 3, the mobile terminal 100 of the embodiment of the present invention includes a display screen 11 and a metal shell 12, the display screen 11 and the metal shell 12 are nested, and the metal shell 12 is used for It carries the display screen 11 and together with the display screen 11 forms a storage cavity, the main board and other components of the mobile terminal are stored in the storage cavity. The mobile terminal 100 also includes a display area 101 and a peripheral area 102 surrounding the display area 101 , the display area 101 is used to realize the display function and touch function of the mobile terminal 100 .

In this embodiment, the metal casing 12 may be the middle frame of the mobile terminal 100, or the back shell of the mobile terminal 100, or the middle frame and the back shell of the mobile terminal 100. This does not make any restrictions.

As shown in FIG. 2, the metal shell 12 is provided with a gap 121, the gap 121 is located at one end of the metal shell 12, and the gap 121 separates the metal shell 12 to form a first resonant arm. 122 , the second resonant arm 123 and the body 124 of the metal shell 12 , the first resonant arm 122 is coupled to the second resonant arm 123 .

The first resonant arm 122 and the second resonant arm 123 are located at one end of the metal shell 12, one end of the first resonant arm 122 is connected to the body 124 of the metal shell 12, and the other end is the The end of the first resonant arm 122, one end of the second resonant arm 123 is connected to the body 124 of the metal shell 12, and the other end is the end of the second resonant arm 123, the first resonant arm 122 The end of the first resonant arm 122 is coupled with the end of the second resonant arm 123 , and the end of the first resonant arm 122 is opposite to the end of the second resonant arm 123 .

In this embodiment, the end of the first resonant arm 122 is opposite to the end of the second resonant arm 123, but it is not limited thereto. In other embodiments, the end of the first resonant arm 122 is opposite to the end of the second resonant arm 123 The end of the second resonant arm 123 may also have an overlapping area. In the embodiment shown in FIG. It overlaps with the other end of the second resonant arm 123, that is, the projection of the end of the second resonant arm 123 on the body 124 of the metal shell 12, that is, in space, the first resonant arm The end of 122 overlaps with the end of the second resonant arm 123 but is not in contact, thereby forming an overlapping area to form a mutual coupling arrangement.

Preferably, in this embodiment, the first resonant arm 122 and the second resonant arm 123 are located at one end of the top of the metal shell 12, but it is not limited thereto. In other embodiments, the first resonant arm 123 A resonant arm 122 and the second resonant arm 123 may also be located at one end or two sides of the bottom of the metal shell 12 .

The length of the first resonant arm 122 is greater than the length of the second resonant arm 123 . The length of the first resonant arm 122 is 20 to 24 mm, and the length of the second resonant arm 123 is 18 to 22 mm.

Preferably, in this implementation manner, the length of the first resonant arm is 22 mm, and the length of the second resonant arm is 20 mm.

As shown in Figure 4, Figure 4 is a schematic structural diagram of the GPS-WIFI antenna of the mobile terminal shown in Figure 1, the mobile terminal 100 also includes a GPS-WIFI antenna 14, and the GPS-WIFI antenna 14 includes the first The resonant arm 122 , the second resonant arm 123 and the feed circuit 141 . The feed circuit 141 is connected between the first connection point of the first resonant arm 122 and the ground terminal, the first connection point is located between the midpoint of the first resonant arm 122 and the first resonant arm 122 close to the end of the second resonant arm 123 , that is, the first connection point is located between the midpoint of the first resonant arm 122 and the end of the first resonant arm 122 .

Further, the distance between the first connection point and the end of the first resonant arm 122 is greater than the distance between the first connection point and the midpoint of the first resonant arm 122, that is to say or , the feed circuit 141 is connected to the first connection point of the first resonant arm 122 , which is located on the first resonant arm 122 away from the first resonant arm 122 and the body 124 of the metal shell 12 Connect one-half to three-quarters of the way to one end.

In this way, by adjusting the position of the first connection point, the feed-in position of the signal source is in the rear half of the area opposite to the first resonant arm 122 and the second resonant arm 123, ensuring that the GPS frequency point is located at 50 ohms in the original smith image near the impedance circle to achieve effective radiation through matching.

The feed source circuit 141 includes a feed source 1411 and a feed source matching circuit 1412 connected to the feed source 1411 , and the feed source matching circuit 1412 is connected between the feed source 1411 and the first connection point. Wherein, the feed source matching circuit 1412 may be an inductance, a capacitance, or a complex matching composed of an inductance and a capacitance. In the implementation of the present invention, the signal source of the GPS-WIFI antenna 14 is a GPS/WIFI dual-frequency signal source, that is to say, the GPS-WIFI antenna 14 can pass through the feed source 1411 and the feed source matching circuit 1412 It is used to send out GPS and/or WIFI tuning signal sources, and transmit GPS and/or WIFI signals outward through the resonance of the first resonant arm 122 and the second resonant arm 123 .

It has been proved by experiments that the radiation ratio of the upper hemisphere of the GPS-WIFI antenna provided by the embodiment of the present invention can generally reach more than 50% or even higher. Compared with the ratio of the upper hemisphere radiation of the existing GPS-WIFI antenna, it can effectively improve The terminal's SNR (the ratio of the carrier signal to the noise signal).

In the embodiment of the present invention, the above-mentioned mobile terminal can be any such as: a mobile phone, a tablet computer (Tablet PersonalComputer), a laptop computer (Laptop Computer), a personal digital assistant (personal digital assistant, PDA for short), a mobile Internet device (Mobile Internet Device, MID) or wearable device (Wearable Device) and other mobile terminals with at least GPS and WIFI functions.

In the GPS-WIFI antenna and mobile terminal provided by the embodiments of the present invention, a first resonant arm and a second resonant arm coupled with the first resonant arm are separated on the metal casing of the mobile terminal, and the GPS-WIFI antenna includes a second resonant arm A resonant arm, a second resonant arm and a feed circuit, the first connection point between the feed circuit and the first resonant arm is located between the midpoint of the first resonant arm and the end of the first resonant arm close to the second resonant arm between. In this way, a relatively independent dual-band radiation antenna structure is formed by the first resonant arm and the second resonant arm, and by directly adjusting the length of the resonant arm, setting the position of the first connection point where the feed circuit is connected to the first resonant arm and other factors , under the condition of satisfying the metal shape, to realize GPS and WIFI common type antenna, and the matching circuit is simple, the radiation efficiency of the antenna is high, and the bandwidth is excellent.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (9)

1. A GPS-WIFI antenna, which is applied to a mobile terminal with a metal shell, is characterized in that, the metal shell is provided with a slit, and a first partition is formed on the metal shell through the slit A resonant arm and a second resonant arm coupled with the first resonant arm, the GPS-WIFI antenna includes the first resonant arm, the second resonant arm and a feed circuit, and the feed circuit is connected to Between the first connection point of the first resonant arm and the ground terminal, the first connection point is located between the midpoint of the first resonant arm and the end of the first resonant arm close to the second resonant arm between. 2. GPS-WIFI antenna as claimed in claim 1, is characterized in that, one end of described first resonant arm is connected with described metal case, and the other end is the end of described resonant arm, and described second resonant arm One end of the first resonant arm is connected to the metal shell, and the end of the first resonant arm is coupled to the other end of the second resonant arm. 3. The GPS-WIFI antenna according to claim 2, wherein the end of the first resonant arm is opposite to the other end of the second resonant arm on the metal shell. 4. GPS-WIFI antenna as claimed in claim 2, is characterized in that, the projection of the end of described first resonant arm on the body of described metal shell, is with the other end of described second resonant arm in the projection. The projections on the body of the metal shell overlap. 5. The GPS-WIFI antenna according to claim 1, wherein the distance between the first connection point and the end of the first resonant arm is greater than the distance between the first connection point and the midpoint. distance. 6. The GPS-WIFI antenna according to claim 1, wherein the length of the first resonant arm is greater than the length of the second resonant arm. 7. The GPS-WIFI antenna according to claim 6, wherein the length of the first resonant arm is 20 to 24 millimeters, and the length of the second resonant arm is 18 to 22 millimeters. 8. The GPS-WIFI antenna according to claim 7, wherein the length of the first resonant arm is 22 millimeters, and the length of the second resonant arm is 20 millimeters. 9. A mobile terminal, characterized in that the mobile terminal comprises the GPS-WIFI antenna according to claims 1-8.