CN106887667B - Antenna and mobile terminal - Google Patents
Antenna and mobile terminal Download PDFInfo
- Publication number
- CN106887667B CN106887667B CN201710281425.8A CN201710281425A CN106887667B CN 106887667 B CN106887667 B CN 106887667B CN 201710281425 A CN201710281425 A CN 201710281425A CN 106887667 B CN106887667 B CN 106887667B
- Authority
- CN
- China
- Prior art keywords
- antenna
- unit
- connecting unit
- units
- omnidirectional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/007—Details of, or arrangements associated with, antennas specially adapted for indoor communication
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/10—Telescopic elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
- H01Q21/10—Collinear arrangements of substantially straight elongated conductive units
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/01—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the shape of the antenna or antenna system
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention relates to an antenna and a mobile terminal, wherein the antenna comprises at least two antenna units and a connecting unit, one end of the connecting unit is fixedly connected with the end part of the antenna unit connected with the connecting unit, and the other end of the connecting unit is movably sleeved with the antenna unit connected with the connecting unit. By the structural design, when the antenna is in an extension state, the antenna is provided with a plurality of antenna units and the connecting unit is made of insulating materials, so that the antenna can form an array antenna, has a directional maximum polarization form, and can realize higher antenna gain than a full-direction antenna in the maximum polarization direction of the antenna under weak signal coverage. Under the condition of antenna contraction, the antenna units are contracted and electrically conducted to form a miniaturized antenna radiator, and the antenna is in an omnidirectional single-antenna form, has omnidirectional gain and can realize omnidirectional receiving and transmitting of the antenna under strong signal coverage. Therefore, the antenna provided by the invention realizes the compatible design of a directional polarization mode and an omnidirectional polarization mode.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to an antenna and a mobile terminal.
Background
With the continuous development of wireless communication technology and the increase of wireless communication services, the role of wireless communication technology in people's life is more and more important. The antenna is used as a part for receiving signals at the front end of the wireless communication system, and the strength of the signals can directly influence the data transmission rate.
The current terminal antenna can be divided into an external antenna and an internal antenna according to the position of the antenna on the terminal. The terminal antenna is usually designed as an internal antenna in the related art based on the advantages that the internal antenna can be installed inside the mobile terminal and is not easily damaged, and a plurality of antenna units can be installed in the mobile terminal and array formation is convenient. Fig. 1 is a schematic diagram of a basic structure of an internal antenna system in a mobile terminal. As shown in fig. 1, the antenna system includes an antenna radiator 10, a radio frequency circuit 20 connected to the antenna radiator 10, and a signal source 30 connected to the radio frequency circuit 20, wherein the antenna radiator 10 may be integrated on a printed circuit board or a terminal housing, and the radio frequency circuit 20 includes a duplexer, a power amplifier, and other components. In the wireless communication signal transmission process, the antenna radiator 10 converts a radio frequency signal from the radio frequency circuit 20 into an electromagnetic wave radiated to a space. Fig. 2 is a schematic view of a radiation direction of the antenna radiator 10 in fig. 1. As shown in fig. 2, the antenna lobe 11 formed by the antenna radiator 10 is also called an omnidirectional antenna lobe, i.e. has radiation in each direction.
However, as the mobile terminal is increasingly miniaturized, thinned and metallized, the problems of deterioration of the surrounding environment of the antenna, shielding and absorption of the antenna signal, etc. are caused, and the omni-directional antenna lobe form itself has a weak radiation performance, so that the radiation performance of the antenna does not meet the preset requirement in some application environments, and the data transmission rate of the terminal is affected.
Disclosure of Invention
The invention provides an antenna and a mobile terminal, which are used for solving the problem that the gain of an omnidirectional antenna is insufficient in a weak signal coverage environment and the transmission rate of the terminal is influenced.
According to a first aspect of the embodiments of the present invention, there is provided an antenna, including at least two antenna units having the same resonance frequency band and polarization mode, and an insulating connection unit disposed between adjacent antenna units, wherein:
one end of the connecting unit is fixedly connected with the end part of the antenna unit connected with the connecting unit, and the other end of the connecting unit is movably sleeved with the antenna unit connected with the connecting unit;
by utilizing the movable sleeve joint, the at least two antenna units can be extended to form an array antenna with a certain distance between the antenna units or contracted to form a monopole antenna which is mutually stacked and electrically conducted.
According to a second aspect of the embodiments of the present invention, there is provided a mobile terminal, including the antenna provided in the first aspect of the embodiments of the present invention, and further including a radio frequency circuit connected to the antenna.
According to the technical scheme, the antenna and the mobile terminal provided by the embodiment of the invention comprise at least two antenna units with the same resonance frequency band and polarization mode and the insulating connecting unit arranged between the adjacent antenna units, wherein one end of the connecting unit is fixedly connected with the end part of the antenna unit connected with the connecting unit, and the other end of the connecting unit is movably sleeved with the antenna unit connected with the connecting unit. By the structural design, when the antenna is in an extension state, the antenna is provided with a plurality of antenna units and the connecting unit is made of insulating materials, so that the antenna can form an array antenna, has a directional maximum polarization form, and can realize higher antenna gain than a full-direction antenna in the maximum polarization direction of the antenna under weak signal coverage. Furthermore, under the condition of antenna contraction, the antenna units are contracted and electrically conducted to form a miniaturized antenna radiator, and the antenna is in an omnidirectional single-antenna form, has omnidirectional gain and can realize omnidirectional receiving and transmitting of the antenna under strong signal coverage. Therefore, the antenna provided by the embodiment of the invention realizes the compatible design of the directional and omnidirectional polarization modes, and meets the selective use requirements of users on the polarization mode and the performance of the antenna according to the signal coverage environment.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic diagram of a basic structure of an internal antenna system in a mobile terminal in the prior art;
fig. 2 is a schematic polarization diagram of the antenna radiator of fig. 1;
fig. 3 is a schematic diagram of a basic structure of an antenna according to a first embodiment of the present invention;
fig. 4 is a schematic polarization diagram of the antenna of fig. 3;
FIG. 5 is a schematic diagram of the antenna of FIG. 3 in a retracted state;
fig. 6 is a schematic polarization diagram of the antenna of fig. 5;
fig. 7 is a schematic diagram of a basic structure of an antenna according to a second embodiment of the present invention;
fig. 8 is a schematic diagram of a basic structure of an antenna according to a third embodiment of the present invention;
fig. 9 is a schematic structural diagram of the antenna in fig. 8 in a contracted state.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The method aims at solving the problems that when the mobile terminal is in a weak signal coverage environment (such as signal coverage blind areas of elevator shafts, basements and the like, and signal transmission rates of certain specific areas are not high due to multipath effects in indoor transmission), the antenna radiation performance cannot meet preset requirements, and the data transmission rate of the terminal is influenced due to the influence factors such as weak signal caused by deterioration of an antenna design environment caused by development of lightness and thinness of the mobile terminal, attenuation of the antenna performance caused by shielding and absorption of antenna signals caused by full metallization of terminal products and the like. The embodiment of the invention provides an antenna and a mobile terminal, wherein the main design principle is the reconfigurable design of an array antenna and a single antenna, so that the antenna can have high gain of the array antenna in a certain direction, and meanwhile, the insufficient gain of the array antenna in other directions is supplemented by utilizing the omni-directionality of the single antenna.
Fig. 3 is a schematic diagram of a basic structure of an antenna according to a first embodiment of the present invention. As shown in fig. 3, the antenna mainly includes four antenna elements (111, 112, 113, 114), three insulated connection elements (211, 212, 213), signal transmission lines (311, 312, 313, 314), an impedance adjusting unit 500, and a signal source 400.
The four antenna elements have the same resonance frequency band and polarization mode, and the antenna element and the connection element are both hollow cylindrical structures, specifically, cylindrical structures, elliptical cylindrical structures, polygonal cylindrical structures, etc., and are not limited to hollow cylindrical structures, for example, the fourth antenna element 114 may be designed to be a solid structure. In the connection mode, one end of each connection unit is fixedly connected with the end part of the antenna unit connected with the connection unit, and the other end of each connection unit is movably sleeved with the antenna unit connected with the connection unit. Taking the first connection unit 211 as an example, one end thereof is fixedly connected to the end of the first antenna unit 111, and the other end thereof is movably sleeved on the second antenna unit 112. The same is true for the connection modes of other antenna units and the connection unit, and the embodiments of the present invention are not described in detail herein.
Furthermore, the antenna units are connected in series through first signal transmission lines (311, 312, 313), and the first antenna unit 111 closest to the signal source 400 is connected to the signal source 400 through a second signal transmission line 314 to form a series 4-unit antenna array, thereby forming the antenna body structure. The signal transmission line may be a coaxial cable, a microstrip line, or the like. In order that the first signal transmission line does not affect the antenna's contraction, stretching activity, it is arranged in the sleeve of the connection unit.
By using the special connection mode of the antenna units and the connection units, when the antenna is under a stretching condition (fig. 3 is a structural schematic diagram of the antenna in a stretching state), the adjacent antenna units are arranged in a straight line shape by taking the insulated connection units as a supporting structure, each antenna unit can independently work in a working frequency band of required resonance, and the antenna units all have the same resonance frequency band and polarization mode. Therefore, when the antenna is in the extended state, an array antenna form having a plurality of antenna elements can be formed.
According to the characteristic that the radiation electromagnetic field of the array antenna is the sum of the radiation fields of all antenna units of the antenna array, the radiation intensity of the antenna in the preset polarization direction can be improved by setting the input signal phase of the antenna, the antenna gain higher than that of a full-direction antenna in the horizontal direction of the antenna under the weak signal coverage is realized, the receiving and transmitting effect of the antenna is improved, and the data transmission rate is improved.
Fig. 4 is a schematic polarization diagram of the antenna in fig. 3. As shown in fig. 4, the antenna is polarized in an array antenna manner, in a direction perpendicular to the antenna array, the main lobe has a definite polarization direction, in which the radiation intensity is stronger, and the antenna gain of the side lobe is weaker than that of the omnidirectional antenna.
Therefore, when the antenna provided by this embodiment is in an extended state, the formed array antenna can be used as a directional antenna, and the main lobe maximum polarization direction is the direction of the array antenna.
Furthermore, the outer diameter of the connecting unit is designed to be the same as that of the antenna unit fixedly connected with the connecting unit, and the inner diameter of the connecting unit is designed to be the same as that of the antenna unit movably sleeved with the connecting unit, so that free stretching and contraction of the antenna can be realized. In order to keep the antenna in a position state better under a stretching state, the inner diameter of the connecting unit can be designed to be slightly smaller than the outer diameter of the antenna unit movably sleeved with the connecting unit, namely the connecting unit and the antenna unit are in interference fit, so that the antenna unit cannot move freely in the connecting unit; the outer diameter of the connection unit may be slightly smaller than the outer diameter of the antenna unit fixedly connected thereto. Meanwhile, the axial length of the connecting unit is designed to be smaller than that of the antenna unit.
Fig. 5 is a schematic structural diagram of the antenna in fig. 3 in a contracted state. As shown in fig. 5, by using the above-mentioned size design of the connection unit and the antenna unit, when the antenna is in the contracted state, the second antenna unit 112 and the second connection unit 212 are retracted into the first antenna unit 111 and the first connection unit 211, and the outer wall of the second antenna unit 112 is in contact with the inner wall of the first antenna unit 111; similarly, the third antenna unit 113 and the third connection unit 213 are retracted into the second antenna unit 112 and the second connection unit 212, the fourth antenna unit 114 is retracted into the third antenna unit 113 and the third connection unit 213, and the third antenna unit 113 is in contact with the second antenna unit 112 and the fourth antenna unit 114 is in contact with the third antenna unit 113.
The antenna is in an omnidirectional antenna form, has the characteristics of miniaturization design and omnidirectional gain of the antenna, and can realize omnidirectional receiving and transmitting of the antenna under strong signal coverage.
Fig. 6 is a schematic polarization diagram of the antenna in fig. 5. As shown in fig. 6, the antenna is contracted to be in an omnidirectional antenna state, which has an omnidirectional polarization form, and has more average antenna gain coverage in an omnidirectional array antenna.
Therefore, by utilizing the structural design, the array antenna can be formed when the antenna is in an extension state, has a directional maximum polarization form, and can realize higher antenna gain than a full-direction antenna in the maximum polarization direction of the antenna under weak signal coverage. Furthermore, under the condition of antenna contraction, the antenna units are contracted and electrically conducted to form a miniaturized antenna radiator, and the antenna is in an omnidirectional single-antenna form, has omnidirectional gain and can realize omnidirectional receiving and transmitting of the antenna under strong signal coverage. Therefore, the antenna provided by the embodiment of the invention realizes the compatible design of the directional and omnidirectional polarization modes, and meets the selective use requirements of users on the polarization mode and the performance of the antenna according to the signal coverage environment.
In order to ensure the radiation intensity of the array antenna in the polarization direction to be maximized, the radial length of each connecting unit and a limiting part at the movable sleeve joint of the connecting units and the antenna units are designed, so that the antenna units are arranged at equal intervals. Preferably, the distance between adjacent ones of the antenna elements is one half wavelength, and the wavelength is a wavelength corresponding to the resonant operating frequency of each antenna element. It should be noted that the distance between the adjacent antenna elements may also be other size values, but the distance between the adjacent antenna elements is one wavelength or one half wavelength, which can ensure that the radiation intensity of the antenna is maximized and the gain of the antenna is optimal.
Further, in order to ensure the maximum polarization direction gain of the array antenna is optimal, it is necessary to ensure that the phase angles of the radiated signals received by each antenna unit are consistent, and therefore, the difference between the signal source 400 and the transmission line of each antenna unit should be an integer multiple of a wavelength, that is, the difference between the first signal transmission lines (311, 312, 313) should be an integer multiple of a wavelength corresponding to the resonant operating frequency of each antenna unit.
In addition, in this embodiment, the number of the antenna elements is designed to be 4, that is, an exponential multiple of 2, and also, in order to guarantee the maximum polarization gain of the array antenna and improve the antenna polarization performance, considering the influence of the self-impedance of the antenna elements and the mutual impedance of other antenna elements, other numbers, such as 2, 8, etc., may also be designed, and certainly, the number may not be designed according to an exponential multiple of 2, such as 3, 5, etc.
The antenna is self-resonant at the required operating frequency in both the extended and retracted states. As shown in fig. 3 and 5, the antenna further includes an impedance adjusting unit 500, wherein the first antenna unit 111 is connected to one end of an L-type matching circuit 510 in the impedance adjusting unit 500 through a second signal transmission line 314, and the other end of the L-type matching circuit 510 is controlled by a matching switch 520 to select a matching device 530 connected in parallel with the L-type matching circuit to be conductively connected. The L-shaped matching circuit 510 and the matching device 530 connected to the matching switch 520 form a phase adjusting circuit of the antenna, and other forms are possible, such as a double L, pi-shaped or single device, which are common design forms. The matching device 530 controlled by the matching switch 520 forms an impedance matching switching circuit of the antenna, which changes the phase of the imaginary part of the antenna to change the input phase of the signal, and further utilizes the impedance adjusting unit 500 to cooperate with the antenna body to self-resonate at the required working frequency under the two states of stretching and shrinking.
In order to automatically control the conducting state of the matching switch 520 and the matching device 530, an antenna state detecting unit 540 is further disposed at the end of the antenna body in this embodiment, for detecting whether the antenna body is in the shrinking state or the stretching state. Specifically, the antenna state detection unit 540 may be designed as a hall sensor, a pressure sensor, or the like, and may also be designed at other positions of the antenna. Meanwhile, the control terminal of the matching switch 520 is connected to the signal output terminal of the antenna state detection unit 540, and when the antenna body is in different states, different line state signals are sent to the matching switch 520. Thus, the matching switch 520 can gate the corresponding phase adjustment path according to the antenna state signal from the antenna state detection unit 540, thereby realizing the automatic adjustment of the tuning impedance and keeping the resonance frequency point of the antenna body in the stretching and contracting states unchanged.
Further, in order to realize the adjustability of the maximum polarization direction of the array antenna formed when the antenna body is in the stretched state, a phase adjustment path may be further added to the impedance adjustment unit 500. Specifically, the gain G of the antenna is K × cos [1/2(2 pi L × cos γ/λ + δ) ], where K is a constant determined by the antenna resistance, L is the inter-antenna-element spacing, γ is the angle from the array vertical direction, λ is the wavelength, and δ is the input phase difference. When the input phase difference is 0, the horizontal direction gamma is 90 degrees, namely the horizontal direction is the strongest, the input phase difference is changed, the maximum gain gamma is changed accordingly, namely the direction of the maximum gain is changed, and then the change of the maximum polarization direction of the array antenna is realized.
Based on the above principle, in the present embodiment, a phase switch and a phase adjusting path (not shown in the figure) are added to the impedance adjusting unit 500, and the signal adjusting phase corresponding to each phase adjusting path is different, and one end of the phase switch is connected to the L-shaped matching circuit 510, and the other end of the phase switch is connected to any one of the at least two phase adjusting paths. Specifically, each phase adjusting path can adopt design modes such as microstrip lines with different lengths, phase-locked loops, different phase matching and the like; in addition, in terms of the connection mode, each phase adjustment path may be designed to have a circuit structure connected in parallel with the matching device 530, or may be designed to be connected in series between the signal source 400 and the phase change switch.
With the above design, if the phase change switch is connected to one of the phase adjusting paths, the signal transmission path between each antenna unit and the phase adjusting path is in a conducting state; on the contrary, if the phase change switch is disconnected from the phase adjustment path, the signal transmission path between each antenna unit and the phase adjustment path is in an off state.
The signal to be transmitted acquired by the signal source 400 is transmitted through each phase adjustment path, and then the phase adjustment corresponding to each phase adjustment path is realized. The corresponding phases of each phase adjusting circuit are different, that is, different phase adjustments can be realized by the same signal through different phase adjusting paths. For example, if the impedance adjusting unit 500 includes two phase adjusting paths, the phase difference corresponding to the two phase adjusting paths may be determined according to a preset angle to be covered by the polarization direction of the antenna, such as 90 °.
In the signal transmission process, the signal source 400 may be connected to a radio frequency processing unit of the mobile terminal to obtain a signal to be transmitted. Each phase adjustment path performs phase adjustment on the signal to be transmitted, transmits the signal to the antenna unit connected with the phase adjustment path, and then transmits the signal through each antenna unit. In the process of receiving signals, each antenna unit may also transmit the received wireless signals to a phase adjustment path connected thereto, and the phase adjustment path performs phase adjustment on the wireless signals and then transmits the wireless signals to the rf processing unit through the signal source 400. The phase of the signal to be transmitted of each antenna unit and the phase of the signal received by each antenna unit may determine the polarization direction of each antenna unit, and the phase of the signal to be transmitted of each antenna unit may be adjusted through a phase adjustment path connected to each antenna unit, so that each phase adjustment path may adjust the phase of the signal to achieve adjustment of the polarization direction of the array antenna.
In order to maximize performance and bandwidth when the antenna elements shrink to form a single antenna, a parasitic ground branch is further added in the embodiment of the present invention, and fig. 7 is a schematic diagram of a basic structure of an antenna provided in the second embodiment of the present invention. As shown in fig. 7, the antenna further includes a ground parasitic branch 610 and a ground switch 620, compared to the antenna according to the first embodiment.
One end of the ground switch 620 is connected to the ground parasitic branch 610, and the other end is connected to the ground terminal. And, when the antenna is in the extended state, the ground switch 320 is turned off; when the antenna is in the retracted state, the ground switch 620 is turned on.
When the antenna is contracted, the grounding parasitic branch 610 is connected to the ground, so that the principle that the resonant frequency of the nearby antenna can be influenced according to the electromagnetic resonance is adopted, and the grounding parasitic branch 610 can be used for three functional designs: firstly, because the grounding switch 320 is turned off when the antenna is in the extended state, that is, the parasitic branch 610 is invalid when the antenna is extended, and meanwhile, because the resonant frequency of the antenna is changed when the antenna is extended, the resonant frequency of the antenna can be changed back to the original operating frequency when the antenna is in the extended state by using the grounding design of the grounding parasitic branch 610; secondly, performance maximization design is carried out, specifically, the length of the designed ground is just equal to that of the antenna after contraction to form a symmetrical dipole antenna design, and compared with the design without ground parasitic, the signal strength can be increased by about 3dB theoretically; finally, the extended bandwidth design, specifically the specific dimensioning of the grounded parasitic branch 610, may help the contracted antenna to increase the bandwidth of the antenna coverage at the original radiation level. Of course, the Antenna body may also be designed to have other design forms after being contracted by the position and structure of the ground parasitic branch 610, for example, a Loop (Loop) Antenna, a Planar Inverted-F (PIFA) Antenna, an Inverted-F Antenna (IFA) Antenna, and the like may also be used.
Therefore, the design of the same antenna performance under different antenna forms is realized by utilizing the switching conduction of the grounding parasitic branch after the antenna is contracted, and further, the compatible design of internal and external reconfigurable and polarization reconfigurable of the same-frequency antenna is realized.
Fig. 8 is a schematic diagram of a basic structure of an antenna according to a third embodiment of the present invention. As shown in fig. 8, the antenna also mainly includes four antenna elements (121, 122, 123, 124) and three insulated connection elements (221, 222, 223).
The antenna is mainly different from the antenna in the first embodiment in that the outer diameter of the connecting unit is equal to the outer diameter of the antenna unit fixedly connected with the connecting unit, and the outer diameter of the connecting unit is the same as the inner diameter of the antenna unit movably sleeved with the connecting unit, so that the antenna can be freely stretched and contracted. In order to keep the antenna in a position state better under a stretching state, the outer diameter of the connecting unit can be designed to be slightly larger than the inner diameter of the antenna unit movably sleeved with the connecting unit, namely the outer diameter and the inner diameter are in interference fit, so that the antenna unit cannot move freely in the connecting unit; the outer diameter of the connection unit may be slightly smaller than the outer diameter of the antenna unit fixedly connected thereto. Meanwhile, the axial length of the connecting unit is designed to be smaller than that of the antenna unit.
By using the special connection mode of the antenna units and the connection units, when the antenna is under a stretching condition (fig. 8 is a structural schematic diagram of the antenna in a stretching state), the adjacent antenna units are arranged in a straight line shape by taking the insulated connection units as a supporting structure, each antenna unit can independently work in a working frequency band of required resonance, and the antenna units all have the same resonance frequency band and polarization mode. Therefore, when the antenna is in the extended state, an array antenna form having a plurality of antenna elements can be formed.
Further, fig. 9 is a schematic structural diagram of the antenna in fig. 8 in a contracted state. As shown in fig. 9, by using the above-mentioned size design of the connection unit and the antenna unit, when the antenna is in the contracted state, the second antenna unit 122 and the first connection unit 221 are completely or partially retracted into the first antenna unit 121, and the outer wall of the second antenna unit 122 is in contact with the inner wall of the first antenna unit 121; similarly, the third antenna element 223 and the second connection element 222 are completely or partially retracted into the second antenna element 122, the fourth antenna element 124 and the second connection element 223 are retracted into the third antenna element 123, the third antenna element 123 is in contact with the second antenna element 122, and the fourth antenna element 124 is in contact with the third antenna element 123.
The antenna units are electrically conducted to form a miniaturized antenna radiator, and the antenna is in an omnidirectional antenna form, has the characteristics of miniaturization design and omnidirectional gain of the antenna, and can realize omnidirectional receiving and transmitting of the antenna under strong signal coverage.
Furthermore, in this embodiment, the antenna units are also connected in series through the first signal transmission line, and the antenna unit 121 closest to the signal source is connected to the signal source through the second signal transmission line to form a series 4-unit antenna array, which constitutes the main structure of the antenna. The signal transmission line may be a coaxial cable, a microstrip line, or the like. In order that the first signal transmission line does not affect the antenna's contraction, stretching activity, it is arranged in the sleeve of the connection unit.
Of course, the antenna units may be connected in parallel, in addition to the serial connection of the antenna units, and specifically, each antenna unit is connected to the signal source through the third signal transmission line. In order that the third signal transmission line does not influence the contraction and stretching activities of the antenna, the third signal transmission line can also be arranged in the sleeve of the antenna unit and the connecting unit in a penetrating way.
Meanwhile, in order to ensure that the maximum polarization direction gain of the array antenna in the parallel connection mode is optimal, it is also required to ensure that the phase angles of the radiation signals received by each antenna unit are consistent, that is, the length difference of the third signal transmission line corresponding to each antenna unit is an integral multiple of one wavelength.
It should be noted that, besides the above-mentioned sleeving connection manner, the antenna units and the connection units may also be designed such that the antenna unit close to the signal source is sleeved in the antenna unit far from the signal source, that is, the diameter of the antenna unit is sequentially increased from the point close to the signal source to the point far from the signal source. In addition, each antenna element and each connection element are not limited to a closed cylindrical structure, and may be a non-closed cylindrical structure (such as a half cylindrical structure, a quarter cylindrical structure, or the like), that is, various groove-shaped structures.
Based on the antenna design, the invention also provides a mobile terminal which can be a mobile phone, a tablet computer or other portable equipment and the like. The mobile terminal may include an antenna and a radio frequency processing unit. The antenna is connected to the rf processing unit, and may be the antenna described in any of the above embodiments.
The antenna can be used for transmitting the received wireless signals to the radio frequency processing unit, or converting the transmitting signals of the radio frequency processing unit into electromagnetic waves and sending the electromagnetic waves. And the radio frequency processing unit is used for carrying out frequency selection, amplification, down-conversion and impedance matching tuning processing on the wireless signals received by the antenna.
Furthermore, in order to reduce the occupied space of the antenna in the terminal when the antenna is extended into an array antenna, the implementation also designs the antenna into a form compatible with internal and external. Specifically, an antenna accommodating space communicated with the outside is arranged in the mobile terminal, wherein: when the antenna unit forms a monopole antenna, the antenna unit can be retracted into the antenna accommodating space; when the antenna unit forms an array antenna, the antenna unit extends out of the antenna accommodating space. Furthermore, the structure can realize the compatible design of the built-in single antenna and the external array antenna, not only meets the design requirements of antenna miniaturization and high-gain form of the antenna, but also can automatically select the polarization form (directional polarization and omnidirectional polarization) and the performance of the antenna by a user according to the use scene and the use requirements. The extension or contraction of the antenna can be manually controlled by a user or controlled by a driving device.
In addition, in order to ensure the radiation intensity of the antenna, the antenna may be located in a region far away from the metal device, i.e., a non-metal region, in the mobile terminal, so as to reduce absorption of a radiated signal of an antenna unit of the antenna by the metal device. In order to ensure that a processing chip in the mobile terminal accurately judges the polarization direction of the antenna, the antenna needs to be isolated from a co-frequency interference source in the mobile terminal, for example, the co-frequency interference source is shielded. In order to reduce the absorption and interference of the radiated signals of the antenna unit of the antenna by the human body, namely, reduce the human body effect, the antenna can be positioned in a mobile terminal where the human hand (human body) is not easy to touch.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. An antenna, characterized by at least two antenna elements having the same resonance frequency band and polarization, and an insulating connection element disposed between adjacent said antenna elements, wherein:
one end of the connecting unit is fixedly connected with the end part of the antenna unit connected with the connecting unit, and the other end of the connecting unit is movably sleeved with the antenna unit connected with the connecting unit;
by utilizing the movable sleeve joint, the at least two antenna units can be extended to form array antennas with a certain distance between the antenna units or contracted to form omnidirectional antennas which are mutually stacked and electrically conducted;
the at least two antenna units are connected in series through a first signal transmission line, and the antenna unit, which is closest to a signal source of the antenna, of the at least two antenna units is connected with the signal source through a second signal transmission line.
2. The antenna of claim 1, wherein an outer diameter of one end of the connection unit is smaller than or equal to an outer diameter of the antenna unit fixedly connected therewith, and the other end of the connection unit is movably sleeved on the antenna unit connected therewith.
3. The antenna of claim 1, wherein the outer diameter of one end of the connecting unit is smaller than or equal to the outer diameter of the antenna unit fixedly connected with the connecting unit, and the other end of the connecting unit is movably inserted into the antenna unit connected with the connecting unit.
4. The antenna of claim 1, wherein when the at least two antenna elements form an array antenna, adjacent ones of the at least two antenna elements are spaced apart by an integer multiple of one-half of a wavelength corresponding to a resonant operating frequency of each antenna element.
5. The antenna of claim 1, wherein the length of the first signal transmission line is an integer multiple of a wavelength corresponding to the resonant operating frequency of each antenna element.
6. The antenna according to claim 1, characterized in that the antenna further comprises an impedance adjusting unit and an antenna state detecting unit, wherein:
the antenna state detection unit is used for detecting the telescopic states of the at least two antenna units;
the impedance adjusting unit comprises a matching selector switch and at least two impedance adjusting paths, and the matching impedance corresponding to each of the at least two impedance adjusting paths is different;
one end of the matching switch is connected with the at least two antenna units, and the other end of the matching switch is used for being connected with any impedance adjusting path of the at least two impedance adjusting paths;
and the control end of the matching changeover switch is connected with the signal output end of the antenna state detection unit and used for gating a corresponding impedance adjusting passage according to the antenna state signal from the antenna state detection unit.
7. The antenna of claim 1, wherein the antenna element further comprises a ground parasitic branch and a ground switch, wherein:
one end of the grounding switch is connected with the grounding parasitic branch, and the other end of the grounding switch is connected with a grounding end;
when the at least two antenna units form an array antenna, the grounding switch is disconnected; when the at least two antenna units form an omnidirectional antenna, the grounding switch is conducted.
8. An antenna, characterized by at least two antenna elements having the same resonance frequency band and polarization, and an insulating connection element disposed between adjacent said antenna elements, wherein:
one end of the connecting unit is fixedly connected with the end part of the antenna unit connected with the connecting unit, and the other end of the connecting unit is movably sleeved with the antenna unit connected with the connecting unit;
by utilizing the movable sleeve joint, the at least two antenna units can be extended to form array antennas with a certain distance between the antenna units or contracted to form omnidirectional antennas which are mutually stacked and electrically conducted;
and each antenna unit of the at least two antenna units is respectively connected with a signal source of the antenna through a third signal transmission line.
9. A mobile terminal comprising an antenna according to any of claims 1-8, and further comprising radio frequency circuitry coupled to said antenna.
10. The mobile terminal according to claim 9, wherein an antenna accommodating space is provided in the mobile terminal, the antenna accommodating space being in communication with the outside, wherein:
when the at least two antenna units form the omnidirectional antenna, the omnidirectional antenna can be contracted into the antenna accommodating space; when the at least two antenna units form the array antenna, the antenna units extend out of the antenna accommodating space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710281425.8A CN106887667B (en) | 2017-04-26 | 2017-04-26 | Antenna and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710281425.8A CN106887667B (en) | 2017-04-26 | 2017-04-26 | Antenna and mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106887667A CN106887667A (en) | 2017-06-23 |
| CN106887667B true CN106887667B (en) | 2020-06-16 |
Family
ID=59183095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710281425.8A Active CN106887667B (en) | 2017-04-26 | 2017-04-26 | Antenna and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106887667B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199141B (en) * | 2017-12-29 | 2021-09-24 | 瑞声精密制造科技(常州)有限公司 | Antenna system and mobile terminal |
| CN110518334B (en) * | 2019-08-26 | 2021-07-23 | 维沃移动通信有限公司 | Mobile terminal |
| CN112531330B (en) * | 2019-09-18 | 2022-11-25 | 青岛海信移动通信技术股份有限公司 | Mobile terminal and mobile terminal accessory equipment |
| CN112054281A (en) * | 2020-08-31 | 2020-12-08 | 瑞声新能源发展(常州)有限公司科教城分公司 | Antenna structure and mobile terminal |
| CN112054282A (en) * | 2020-08-31 | 2020-12-08 | 瑞声新能源发展(常州)有限公司科教城分公司 | Antenna structure and mobile terminal |
| CN112272391B (en) * | 2020-10-19 | 2021-08-17 | 珠海格力电器股份有限公司 | Antenna signal adjusting device and terminal signal conversion method |
| CN117408097B (en) * | 2023-12-15 | 2024-03-12 | 昆宇蓝程（北京）科技有限责任公司 | Method and system for improving signal strength related to VICTS antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913227A (en) * | 2005-08-10 | 2007-02-14 | 启碁科技股份有限公司 | Single-pole antenna |
| CN101740849A (en) * | 2010-01-26 | 2010-06-16 | 华为终端有限公司 | Multi-band antenna |
| CN201773934U (en) * | 2010-08-19 | 2011-03-23 | 上海德门电子科技有限公司 | Mobile phone antenna |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11220314A (en) * | 1998-02-02 | 1999-08-10 | Harada Ind Co Ltd | Antenna and its production |
| JP2002071776A (en) * | 2000-09-01 | 2002-03-12 | Koden Electronics Co Ltd | Radio direction finder |
| US7075487B2 (en) * | 2004-07-16 | 2006-07-11 | Motorola, Inc, | Planar inverted-F antenna with extendable portion |
-
2017
- 2017-04-26 CN CN201710281425.8A patent/CN106887667B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913227A (en) * | 2005-08-10 | 2007-02-14 | 启碁科技股份有限公司 | Single-pole antenna |
| CN101740849A (en) * | 2010-01-26 | 2010-06-16 | 华为终端有限公司 | Multi-band antenna |
| CN201773934U (en) * | 2010-08-19 | 2011-03-23 | 上海德门电子科技有限公司 | Mobile phone antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106887667A (en) | 2017-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106887667B (en) | Antenna and mobile terminal | |
| KR102351589B1 (en) | Antenna placement arrangement on device with expandable display | |
| US11670838B2 (en) | Three-slotted antenna apparatus and method | |
| EP2403057B1 (en) | Controlling a beamforming antenna using reconfigurable parasitic elements | |
| KR100771582B1 (en) | Antenna arrangement and portable radio communication device | |
| EP0847103A2 (en) | Shared antenna and portable radio device using the same | |
| EP1456908A1 (en) | A dual band phased array employing spatial second harmonics | |
| AU2002352616A1 (en) | A dual band phased array employing spatial second harmonics | |
| US11258177B2 (en) | Antenna unit, array antenna, and electronic device | |
| EP1841006A1 (en) | Mobile wireless unit | |
| JP3211445U (en) | Modal antenna with correlation adjustment for diversity applications | |
| WO2015003034A1 (en) | Electronic device case with antenna | |
| CN107181053B (en) | Antenna device and electronic apparatus | |
| CN103346392A (en) | Mobile phone antenna with reconfigurable directional diagram | |
| US20100111143A1 (en) | Portable radio | |
| US20120081259A1 (en) | Inverted-U Crossed-Dipole Satcom Antenna | |
| KR101812653B1 (en) | Branched uwb antenna | |
| WO2021047385A1 (en) | Antenna apparatus, communication product, and reconstructuring method for antenna patterns | |
| US11115511B1 (en) | Communication device having configurable housing assembly with multiple antennas | |
| US10148014B2 (en) | Highly isolated monopole antenna system | |
| EP3357167A1 (en) | In-band full-duplex complementary antenna | |
| CN105789828B (en) | Antenna and mobile terminal | |
| CN107706506A (en) | A kind of reconfigurable antenna and intelligent communications terminal | |
| CN109216907B (en) | Double-fed antenna and electronic equipment | |
| US10374311B2 (en) | Antenna for a portable communication device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee after: Qingdao Hisense Mobile Communication Technology Co.,Ltd. Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee before: HISENSE MOBILE COMMUNICATIONS TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |