CN203839510U - A mobile phone and its antenna - Google Patents

Abstract

The utility model is applicable to the field of mobile terminals, and provides a mobile phone and an antenna thereof. The antenna comprises a first antenna radiator, a second antenna radiator, a second feeding unit and two or more grounding terminals, wherein the second antenna radiator is connected with one or more feeding ends of the second feeding unit, signals are transmitted between the first antenna radiator and the second antenna radiator through space coupling, the first antenna radiator is provided with branches connected with the two or more grounding terminals, and each of the two or more grounding terminals is connected with one branch; and signals sent by the one or more feeding ends of the second feeding unit are connected with the ground through the second antenna radiator, the branches and the two or more grounding terminals. The antenna provided by the utility model is simple in overall structure and convenient for production and manufacturing. Meanwhile, miniaturization in volume and size of the antenna is realized.

Description

A mobile phone and its antenna

technical field

The utility model belongs to the field of mobile terminals, in particular to a mobile phone and an antenna thereof. the

Background technique

With the advent of the 4G era, LTE (Long Term Evolution, long-term evolution) is no longer a concept but a trend. Due to the increase in 4G bandwidth, the requirements for antennas of mobile terminals (such as mobile phones) are also significantly higher than those of 3G. improvement. At present, the implementation of 4G antennas generally adopts the method of increasing the antenna clearance area on the basis of 3G, including directly increasing the antenna clearance area or using metal frames to increase the clearance area in disguise, and the increase of the antenna clearance area will make the antenna The volume and size of the mobile terminal increase, which will inevitably cause the size and shape of the mobile terminal to change, making it impossible for the mobile terminal to be miniaturized and thinned. the

Utility model content

The purpose of this utility model is to provide an antenna to solve the defect in the prior art that the volume and size of the antenna cannot be miniaturized by using a metal frame to increase the clearance area in a disguised form in order to increase the frequency coverage. the

The utility model is achieved in this way, an antenna, comprising: a first antenna radiator, a second antenna radiator, a second feed unit and two or more ground terminals;

The second antenna radiator is connected to one or more feed terminals in the second feed unit, the first antenna radiator and the second antenna radiator transmit signals through space coupling, the The first antenna radiator is provided with a branch connected to the two or more ground terminals, and each of the two or more ground terminals is connected to a branch circuit;

Signals sent by one or more feed terminals in the second feed unit are connected to the ground through the second antenna radiator, the branch circuit and the two or more ground terminals. the

The first antenna radiator includes a first branch and a second branch, the second feeding unit includes a first feeding end, and the two or more grounding ends include a first grounding end and a second grounding end terminal, the first branch is connected to the first ground terminal, the second branch is connected to the second ground terminal, and the second antenna radiator is connected to the first feeding terminal. the

The antenna also includes a first antenna matching network, a second antenna matching network and a third antenna matching network, the first branch is connected to the input of the first antenna matching network, and the output of the first antenna matching network terminal is connected to the first ground terminal, the second branch is connected to the input terminal of the second antenna matching network, the output terminal of the second antenna matching network is connected to the second ground terminal, and the second antenna The radiator is connected to the input end of the third antenna matching network, and the output end of the third antenna matching network is connected to the first feeding end. the

The antenna also includes a first switch unit, a second switch unit, a second feed terminal, a fourth antenna matching network and a control chip;

The first antenna radiator includes a third branch, the third branch is connected to the input end of the fourth antenna matching network, and the output end of the fourth antenna matching network is connected to the input of the first switch unit end, the output end of the first switch unit is connected to the second feeding end, the input end of the second switch unit is connected to the output end of the third antenna matching network, and the output end of the second switch unit connecting the first feed end;

The output terminal of the control chip is connected to the control terminal of the first switch unit and the control terminal of the second switch unit, and the control chip controls the first switch unit to make the second feed terminal, The fourth antenna matching network, the first antenna radiator, the first antenna matching network, the first ground terminal, the second antenna matching network and the second ground terminal form a signal loop, so When the control chip controls the second switch unit to be turned on, the first feeding terminal, the third antenna matching network, the second antenna radiator, the first antenna radiator, the first The antenna matching network, the first ground terminal, the second antenna matching network and the second ground terminal form a signal loop;

The control chip adjusts the frequency range covered by the antenna by controlling the conduction of the first switch unit or the second switch unit. the

The antenna further includes a third antenna radiator, a third switch unit, a third feed unit, a fifth antenna matching network and a lumped parameter element, and the third antenna radiator is connected to an input of the fifth antenna matching network terminal, the output terminal of the fifth antenna matching network is connected to the input terminal of the third switch unit, the output terminal of the third switch unit is connected to the third feed unit, and the control terminal of the third switch unit connected to the output terminal of the control chip, the third feed unit includes one or more feed terminals, and one or more lumped terminals are arranged between the third antenna radiator and the second antenna radiator parameter element. the

The first antenna radiator and the second antenna radiator are distributed on the support, the PCB board, the housing or the surface of the touch screen. the

The antenna also includes a whole metal body and an electrical connector, the whole metal body is connected to the metal ground of the whole machine through the electrical connector, and the number of the electrical connector is one. the

Another object of the present invention is to provide a mobile phone with the above-mentioned antenna built in it. the

The antenna provided by the utility model widens the width of the grounding point in a disguised form by increasing the number of grounding points, effectively expands the bandwidth, makes the overall structure of the antenna simple, and is convenient for manufacturing, and at the same time realizes the volume and size of the antenna miniaturization. the

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the accompanying drawings that are required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the practical For some novel embodiments, those skilled in the art can also obtain other drawings based on these drawings without any creative work. the

Fig. 1 is the structural representation of a kind of antenna that the utility model embodiment provides;

Fig. 2 is the concrete connection diagram of a kind of antenna that the utility model embodiment provides;

Fig. 3 is a kind of antenna provided by the embodiment of the utility model under the vector network analyzer S parameter comparative schematic diagram;

Fig. 4 is another embodiment structural representation of a kind of antenna that the utility model embodiment provides;

Fig. 5 is the concrete connection diagram of another embodiment of a kind of antenna that the utility model embodiment provides;

Fig. 6 is a schematic structural diagram of another embodiment of an antenna provided by an embodiment of the present invention. the

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. the

In order to illustrate the technical solution described in the utility model, the following specific examples will be used for illustration. the

An antenna provided in an embodiment of the present invention includes: a first antenna radiator, a second antenna radiator, a second feed unit and two or more ground terminals;

The second antenna radiator is connected to one or more feed terminals in the second feed unit, the first antenna radiator and the second antenna radiator transmit signals through space coupling, the The first antenna radiator is provided with a branch connected to the two or more ground terminals, and each of the two or more ground terminals is connected to a branch circuit;

Signals sent by one or more feed terminals in the second feed unit are connected to the ground through the second antenna radiator, the branch circuit and the two or more ground terminals. the

Wherein, the feeding end is used to provide signals, and the two or more grounding ends are connected to the metal ground of the whole machine, and the metal ground of the whole machine is used as an arm of antenna radiation to receive signals provided by the feeding end. the

Wherein, the first antenna radiator and the second antenna radiator may transmit signals to each other through spatial coupling. the

Specifically, a gap is provided between the first antenna radiator and the second antenna radiator. the

Further, the antenna further includes an antenna matching circuit. There may be multiple antenna matching circuits, and the antenna matching circuit may be located at any connection position between the antenna and the feed end and between the antenna and the metal ground of the whole machine. the

Further, the first antenna radiator and the second antenna radiator are distributed on the support, the PCB board, the housing or the surface of the touch screen. the

The utility model embodiment is described below with specific examples, and an antenna radiator is used to connect two ground terminals for illustration. the

Specifically, the antenna includes a first antenna radiator 31 and a second antenna radiator 32, the first antenna radiator 31 includes a first branch 41 and a second branch 42, and the second feed unit includes The first feed terminal E2, the two or more ground terminals include a first ground terminal 211 and a second ground terminal 212, the first branch 41 is connected to the first ground terminal 211, and the second branch The path 42 is connected to the second ground terminal 212, and the second antenna radiator 32 is connected to the first feeding terminal E2. the

Further, the antenna further includes a first antenna matching network 221, a second antenna matching network 222 and a third antenna matching 223, the first branch 41 is connected to the input end of the first antenna matching network 221, the The output terminal of the first antenna matching network 221 is connected to the first ground terminal 211, the second branch 42 is connected to the input terminal of the second antenna matching network 222, and the output terminal of the second antenna matching network 222 is connected to The second ground terminal 212, the second antenna radiator 32 are connected to the input terminal of the third antenna matching network 223, and the output terminal of the third antenna matching network 223 is connected to the first feeding terminal E2. the

Further, the antenna also includes a complete metal body 12 and an electrical connector 51, the complete metal body 12 is connected to the metal ground of the complete device through the electrical connector 51, and the number of the electrical connectors 51 for one. the

The working process of the embodiment of the utility model is as follows: the first feed end E2 excites a signal, which passes through the third antenna matching network 223, the second antenna radiator 32, and the first antenna radiator 32 successively. , the first antenna matching network 221, the first grounding terminal 211, the second antenna matching network 222, and the second grounding terminal 212 enter the metal ground of the whole machine, and form a signal loop to achieve antenna frequency coverage . the

The antenna in the embodiment of the present invention adopts a grounding point and the S parameter of two grounding points under the vector network analyzer to compare below, there are following three kinds of schemes, the first kind of scheme: the signal is passed through by the second antenna radiator 32. The antenna loop formed by the first antenna radiator 31 , the first branch 41 , the first antenna matching network 221 and the first ground terminal 211 returns to the metal ground of the whole machine. The second scheme: the signal returns to the metal ground of the whole machine through the antenna loop formed by the second antenna radiator 32, the first antenna radiator 31, the second branch 42, the second antenna matching network 222 and the second ground terminal 212 . The third solution is the solution in the embodiment of the utility model: the signal passes through the second antenna radiator 32 and the first antenna radiator 31, and then passes through the second branch 42, the second antenna matching network 223 and the first ground terminal respectively 211, the second branch 42, the second antenna matching network 222, and the second ground 212 form an antenna loop back to the metal ground of the whole machine. the

Please refer to Fig. 3, which is a schematic diagram of the S parameter comparison of the antenna under the vector network analyzer under the above three schemes. The S-parameters of the antenna are the best when the sites work at the same time, and the efficiency of the antenna also meets the communication requirements after the test in the darkroom. the

The utility model provides an antenna by increasing the number of grounding points, widening the width of the grounding point in a disguised form, improving the impedance characteristics of the antenna entry point, effectively expanding the bandwidth, and realizing the space of multiple frequency bands with far different frequencies. Multiplexing makes the overall structure of the antenna simple and easy to manufacture, and at the same time realizes the miniaturization of the volume and size of the antenna, which can be applied in the solution of upgrading mobile phones to 4G in the current 3G antenna environment. the

Another embodiment of the utility model provides an antenna comprising: a first switch unit S1, a second switch unit S2, a second feeder E1, a fourth antenna matching network 224 and a control chip 10;

The first antenna radiator 31 includes a third branch 43, the third branch 43 is connected to the input end of the fourth antenna matching network 224, and the output end of the fourth antenna matching network 224 is connected to the first An input terminal of a switch unit S1, the output terminal of the first switch unit S1 is connected to the second feed terminal E1, and the input terminal of the second switch unit S2 is connected to the output terminal of the third antenna matching network 223 , the output terminal of the second switch unit S2 is connected to the first feeding terminal E2. the

The output terminal of the control chip 10 is connected to the control terminal of the first switch unit S1 and the control terminal of the second switch unit S2, and the control chip controls the first switch unit S1 to turn on the second switch unit S1. The feeding terminal E1, the fourth antenna matching network 224, the first antenna radiator 31, the first antenna matching network 221, the first ground terminal 211, the second antenna matching network 222 and the The second ground terminal 212 forms a signal loop, and the control chip 10 controls the second switch unit S2 to turn on so that the first feed terminal E2, the third antenna matching network 223, and the second antenna The radiator 32, the first antenna radiator 31, the first antenna matching network 221, the first ground terminal 211, the second antenna matching network 222 and the second ground terminal 212 form a signal loop. the

The control chip 10 controls the conduction of the first switch unit S1 or the second switch unit S2 to adjust the frequency range covered by the antenna. the

In this embodiment, the first switch unit is a SPST switch S1, and the second switch unit is a SPST switch S2. the

The specific working process of this utility model embodiment is: when the control chip controls the first switch unit S1 to be turned on and the second switch unit S2 to be turned off, the first antenna radiator 31 starts to work, and by adjusting its corresponding size, it can cover Different frequency bands, in this embodiment, make the first antenna radiator 31 cover the LTE receiving frequency band (1805MHz-2690MHz). The energy signal sent by the second feeding terminal E1 enters the first antenna radiator 31 after passing through the second switch unit S1 and the fourth antenna matching network 224, and then passes through the first antenna matching network 221 and the second antenna matching network 222, and finally enter the metal ground 221 of the whole machine through the first ground terminal 211 and the second ground terminal 212 to form an antenna loop. Therefore, the resonance of 1805MHz-2690MHz is excited through this loop. After the darkroom test, the space generated by the antenna resonance Radiation efficiency meets communication requirements. the

When the control chip controls the first switch unit S1 to be disconnected and the second switch unit S2 to be turned on, the first antenna radiator 31 and the second antenna radiator 32 work simultaneously, by adjusting the first antenna radiator 31 and the second antenna The corresponding size of the radiator 32 can cover different frequency bands. In this embodiment, it is made to cover the GPS antenna frequency band (1.5GHz-1.6GHz). The energy signal sent by the first feeding end E2 passes through the second antenna radiator 32, and through the spatial coupling between the second antenna radiator 32 and the first antenna radiator 31, the energy signal is coupled to the first antenna radiator 31, the first antenna radiator 31 passes through the first antenna matching network 221 and the second antenna matching network 222, and finally enters the metal ground 221 of the whole machine through the first ground terminal 211 and the second ground terminal 212 to form an antenna loop , Therefore, the resonance of 1.5GHz-1.6GHz is excited through the loop, and the resulting GPS antenna resonance has been tested in an anechoic chamber, and its radiation efficiency meets the communication requirements. the

In the embodiment of the utility model, a built-in antenna of a mobile phone realizes different feed terminals and grounding points on the antenna radiator to form different loops by controlling the switch unit, so that the bandwidth of the antenna simultaneously covers the frequency band of the GPS antenna (1.5GHz-1.6GHz) With the LTE diversity antenna frequency band (1850MHz-2690MHz), the overall structure is simple, easy to manufacture, and the volume and size of the antenna are miniaturized. the

An antenna provided by another embodiment of the present invention further includes a third antenna radiator 33, a third switch unit S3, a third feed unit E3, a fifth antenna matching network 225, and a lumped parameter element. The three-antenna radiator 33 is connected to the input end of the fifth antenna matching network 225, the output end of the fifth antenna matching network 225 is connected to the input end of the third switch unit S3, and the output of the third switch unit S3 terminal connected to the third feed unit, the control terminal of the third switch unit S3 connected to the output terminal of the control chip 10, the third feed unit includes one or more feed terminals, the third One or more lumped parametric elements are arranged between the antenna radiator 33 and the second antenna radiator 32 . the

Specifically, the lumped parameter element includes a resistance R, an inductance L or a capacitance C element. the

The embodiments of the present invention will be described below with specific examples, wherein the lumped parameter element capacitive element C and the third feeding unit include a feeding terminal E3. the

The specific working process of the embodiment of the utility model is: when the control chip controls the first switch unit S1 to be disconnected, controls the second switch unit S2 to be disconnected, and controls the third switch unit S3 to be turned on, the first antenna radiator 31, the second The second antenna radiator 32 and the third antenna radiator 33 work simultaneously, and different frequency bands can be covered by adjusting the corresponding sizes of the first antenna radiator 31 , the second antenna radiator 32 and the third antenna radiator 33 . The energy signal sent by the third feeding terminal E3 enters the second antenna radiator 32 through the third antenna radiator 33 through the lumped parameter element capacitance C, and passes through the second antenna radiator 32 and the first antenna radiator 31, the energy signal is coupled to the first antenna radiator 31, then the first antenna radiator 31 passes through the first antenna matching network 221 and the second antenna matching network 222, and finally passes through the first ground terminal 211 and The second ground terminal 212 enters the metal ground 221 of the whole machine to form an antenna loop. the

Specifically, the control chip is a single-chip microcomputer, such as 80C51 in MCS-51 series single-chip microcomputers. Specifically, the control chip is a CPLD, so that the execution speed is fast and the control response is sensitive. Specifically, the control chip is an FPGA, so that the system consumes less power and the control speed is faster. the

The antenna provided by the utility model sets lumped parameter elements between the antenna radiator and between the antenna radiator and the metal ground of the whole machine, so that the feed end, the antenna radiator, the lumped parameter element and the metal ground of the whole machine An antenna loop is formed to increase the frequency range covered by the antenna, and the overall structure of the antenna is simple, which is convenient for manufacturing, and at the same time realizes the miniaturization of the volume and size of the antenna. the

The antenna provided by the embodiment of the utility model can maximize the performance of the antenna in a limited antenna environment, and can realize the spatial multiplexing of multiple frequency bands with far different frequencies on the same antenna, which can be applied to the current 3G In the plan of upgrading the mobile phone to 4G in the antenna environment. This solution can meet GSM, GPS, DCS, PCS, WCDMA, CDMA, EVDO, TD-SCDMA, TD-LTE, BLUETOOTH, WIMAX2.5, IMT-ADVANCED, WLAN5.2, WIMAX5.8 and other standards. the

Another embodiment of the present utility model provides a mobile phone with the above-mentioned antenna built in it. the

A mobile phone provided by an embodiment of the present invention adopts the above-mentioned antenna. Since the above-mentioned antenna has the advantages of miniaturization in volume and size, the bandwidth of the LTE antenna can be expanded without changing the overall structure of the mobile phone, and at the same time, the overall machine appearance. the

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the utility model belongs, those who make several equivalent substitutions or obvious modifications without departing from the concept of the utility model, and have the same performance or use, should be deemed to belong to the utility model submitted by the The scope of patent protection determined by the claims. the

Claims (9)

1. An antenna, characterized in that comprising: a first antenna radiator, a second antenna radiator, a second feed unit and two or more ground terminals; The second antenna radiator is connected to one or more feed terminals in the second feed unit, the first antenna radiator and the second antenna radiator transmit signals through space coupling, the The first antenna radiator is provided with a branch connected to the two or more ground terminals, and each of the two or more ground terminals is connected to one of the branches; Signals sent by one or more feed terminals in the second feed unit are connected to the ground through the second antenna radiator, the branch circuit and the two or more ground terminals. the 2. The antenna according to claim 1, wherein a gap is provided between the first antenna radiator and the second antenna radiator. the 3. The antenna according to claim 2, wherein the first antenna radiator includes a first branch and a second branch, the second feeding unit includes a first feeding end, and the two One or more ground terminals include a first ground terminal and a second ground terminal, the first branch is connected to the first ground terminal, the second branch is connected to the second ground terminal, and the second antenna The radiator is connected to the first feeding end. the 4. The antenna according to claim 3, further comprising a first antenna matching network, a second antenna matching network and a third antenna matching network, the first branch is connected to the first antenna matching network Input terminal, the output terminal of the first antenna matching network is connected to the first ground terminal, the second branch is connected to the input terminal of the second antenna matching network, and the output terminal of the second antenna matching network is connected to The second ground terminal, the second antenna radiator are connected to the input terminal of the third antenna matching network, and the output terminal of the third antenna matching network is connected to the first feeding terminal. the 5. The antenna according to claim 4, further comprising a first switch unit, a second switch unit, a second feed terminal, a fourth antenna matching network and a control chip; The first antenna radiator includes a third branch, the third branch is connected to the input end of the fourth antenna matching network, and the output end of the fourth antenna matching network is connected to the input of the first switch unit terminal, the output terminal of the first switch unit is connected to the second feeding terminal, the input terminal of the second switch unit is connected to the output terminal of the third antenna matching network, and the output terminal of the second switch unit end connected to the first feeding end; The output terminal of the control chip is connected to the control terminal of the first switch unit and the control terminal of the second switch unit, and the control chip controls the first switch unit to make the second feed terminal, The fourth antenna matching network, the first antenna radiator, the first antenna matching network, the first ground terminal, the second antenna matching network and the second ground terminal form a signal loop, so When the control chip controls the second switch unit to be turned on, the first feeding terminal, the third antenna matching network, the second antenna radiator, the first antenna radiator, the first The antenna matching network, the first ground terminal, the second antenna matching network and the second ground terminal form a signal loop; The control chip adjusts the frequency range covered by the antenna by controlling the conduction of the first switch unit or the second switch unit. the 6. The antenna according to claim 5, further comprising a third antenna radiator, a third switch unit, a third feed unit, a fifth antenna matching network and a lumped parameter element, the third antenna The radiator is connected to the input end of the fifth antenna matching network, the output end of the fifth antenna matching network is connected to the input end of the third switch unit, and the output end of the third switch unit is connected to the third feeder An electrical unit, the control terminal of the third switch unit is connected to the output terminal of the control chip, the third feeding unit includes one or more feeding terminals, the third antenna radiator and the second antenna One or more lumped parameter elements are arranged between the radiators. the 7 . The antenna according to claim 1 , wherein the first antenna radiator and the second antenna radiator are distributed on a support, a PCB board, a housing or a surface of a touch screen. the 8. The antenna according to claim 1, further comprising a metal body of the whole machine and an electrical connector, the metal body of the whole machine is connected to the metal ground of the whole machine through the electrical connector, the electrical connector The quantity is one. the 9. A mobile phone, characterized in that the mobile phone is built with the antenna according to any one of claims 1-8. the