CN103024760A - Modeling method and device for mobile terminal antenna channel cross-polarization extension characteristics - Google Patents

Abstract

The invention discloses a modeling method and a device for mobile terminal antenna channel cross-polarization extension characteristics. The method is based on the spherical coordinate system, and comprises the following steps of: establishing an antenna field port incident/scattering characterization parameter and a road port transmission/reflection characterization parameter; according to the parameters, establishing a field / road port transmission /coupling characteristic beta; and according to the parameter and the field/road port transmission/coupling characteristic beta, establishing an antenna channel cross-polarized antenna channel cross-polarization extension characteristic model h. The invention further discloses the modeling device for mobile terminal antenna channel cross-polarization extension characteristics. The device has low requirements for environment and is simple and feasible.

Description

Modeling method and the device of mobile terminal antenna channel cross polarization extended attribute

Technical field

The present invention relates to the field of antenna of the communication technology, relate in particular to a kind of modeling method and device of mobile terminal antenna channel cross polarization extended attribute.

Background technology

At present, 3GPP (The 3rd Generation Partnership Project, third generation partner program) and Winner the channel model SCM (Spatial Channel Model) and the SCME (Spatial Channel Model Extension) that adopt, all are accurate physical models, reason is that the physical spatial location of scattering object in this model is uncertain, and channel modeling method is only based near in/out ejected wave direction (ripple digression (DOD)/Bo Dajiao (the DOA)) information of the scattering object channel transceiver two ends.In concept, the SCM of 3GPP can support randomly topologically structured aerial array, yet SCM/SCME/WIM (Walfisch-Ikegami Model) is in the specific implementation of its more detailed modeling scheme and winner, only considered uniform linear array (Uniform Linear Array, ULA) direct, the simplest this antenna model.

The high-performance that super three generations (B3G) and 4G system are pursued, require antenna of new generation to have and to take full advantage of radio channel characteristic, the ability of polarization and spatial gain is provided, this can abundant, meticulous reflection actual antennas channel characteristics with regard to the objective requirement antenna model, in order to provide more accurately channel information for system.

Along with the fast development of the technology such as mobile phone, the multi-antenna technology of mobile terminal side has become one of key technology for PHY of B3G and 4G system.The miniaturization that mobile terminal multi-antenna has and high density characteristics have determined the characterizing method of terminal antenna channel-polarization extended attribute, are the problem needing to overcomes of terminal antenna Channel Modeling.

Summary of the invention

The object of the invention is to, a kind of modeling method and device of mobile terminal antenna channel cross polarization extended attribute is provided, to optimize existing mobile terminal antenna channel modeling method.

The invention provides a kind of modeling method of mobile terminal antenna channel cross polarization extended attribute, said method comprises based on spherical coordinate system:

Set up port incident/scattering properties characterization parameter and a road port transmission/reflection characteristic characterization parameter of antenna;

According to above-mentioned parameter, set up field/road port transmission/coupled characteristic β;

According to above-mentioned parameter and field/road port transmission/coupled characteristic β, set up antenna channel cross polarization extended attribute model h.

Preferably, above-mentioned port incident/scattering properties characterization parameter comprises: the S parameter S of field/road port ₂₁

Preferably, above-mentioned road port transmission/reflection characteristic characterization parameter comprises: the active load reflection coefficient Γ of road port ₁, antenna input emission ratio Γ _a

Preferably, the S parameter S of above-mentioned field/road port ₂₁By following Formula:

$S_{21}({\mathrm{\Ω}}_R,\stackrel{\→}{r})=\stackrel{\→}{G}\left({\mathrm{\Ω}}_R\right)e^{-j\stackrel{\→}{k}\·\stackrel{\→}{r}+\mathrm{j\Φ}\left({\mathrm{\Ω}}_R\right)}\·\stackrel{\→}{H}\left({\mathrm{\Ω}}_R\right)$

$=(G_{\mathrm{\θ}}{H}_{\mathrm{\θ}}+G_{\mathrm{\φ}}{H}_{\mathrm{\φ}})e^{-j\stackrel{\→}{k}\·\stackrel{\→}{r}+\mathrm{j\Φ}\left({\mathrm{\Ω}}_R\right)}$

Wherein, Ω _RExpression incoming wave incidence angle;

The space coordinates vector of expression antenna; Φ (Ω _R) expression antenna phase pattern; The expression wave-number vector;

The vector voltage gain pattern of expression antenna,

θ is the θ coordinate in the spherical coordinate system,

The unit vector of expression θ coordinate, G _θThe θ component of expression vector voltage gain, φ represents the φ coordinate in the spherical coordinate system,

The unit vector of expression φ coordinate, G _φThe φ component of expression vector voltage gain;

Representation space electromagnetic signal channel list diametral voltage transmission coefficient, H _θThe θ component H of representation space electromagnetic signal channel list diametral voltage transmission coefficient _φThe φ component of representation space electromagnetic signal channel list diametral voltage transmission coefficient.

Preferably, above-mentioned field/road port transmission/coupled characteristic β passes through following Formula:

$\mathrm{\&beta;}=\frac{1}{\mathrm{\&Delta;}}=\frac{1}{1-{\mathrm{<figure-callout\; id="11"\; label="S"\; filenames="HDA0000092955590000051.png"\; state="\{\{state\}\}">S</figure-callout>}}_{11}{\mathrm{\&Gamma;}}_1},$ S ₁₁＝Γ _a

Wherein, S ₁₁Be the scattering parameter of road port, S ₁₁=Γ _a, Γ _aBe antenna input emission ratio; Γ ₁Active load reflection coefficient for the sky line port.

Preferably, above-mentioned according to above-mentioned parameter and model, set up antenna channel cross polarization extended attribute model step and specifically may further comprise the steps:

S parameter S according to above-mentioned field/road port ₂₁, set up the cross polarization extended attribute of antenna channel;

According to the cross polarization extended attribute of above-mentioned field/road port transmission/coupled characteristic β and above-mentioned antenna channel, set up the cross polarization extended attribute model h of antenna channel.

Preferably, the cross polarization extended attribute of above-mentioned antenna channel calculates by following formula:

Wherein, the xOz plane of φ=0 ° expression spherical coordinates; The yOz plane of φ=90 ° spherical coordinates.Preferably, the cross polarization extended attribute model h of above-mentioned antenna channel passes through following Formula:

$h={\mathrm{\&beta;S}}_{21}=\mathrm{\&beta;}\stackrel{\&RightArrow;}{G}\left({\mathrm{\&Omega;}}_R\right)e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}\&CenterDot;\stackrel{\&RightArrow;}{H}\left({\mathrm{\&Omega;}}_R\right)$

$={\mathrm{\&beta;G}}_{\mathrm{\&phi;}}(\mathrm{XPR}\&times;H_{\mathrm{\&theta;}}+H_{\mathrm{\&phi;}})e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}$

Wherein, XPR represents XPR (θ, φ=0 °) and XPR (θ, φ=90 °).

The present invention further provides a kind of model building device of mobile terminal antenna channel cross polarization extended attribute, said apparatus comprises that parameter is set up module, field/road port transmission/coupled characteristic is set up module and model building module,

Above-mentioned parameter is set up module, is used for setting up port incident/scattering properties characterization parameter and a road port transmission/reflection characteristic characterization parameter of antenna;

Field/road port transmission/coupled characteristic is set up module, is used for setting up the parameter that module is set up according to above-mentioned parameter, sets up field/road port transmission/coupled characteristic β;

Model building module is used for setting up parameter and the above-mentioned field/road port transmission/coupled characteristic that module sets up according to above-mentioned parameter and sets up the field/road port transmission/coupled characteristic β that sets up in the module, sets up antenna channel cross polarization extended attribute model h.

Preferably, above-mentioned model building module is also for the cross polarization extended attribute of setting up antenna channel.

The present invention sets up the cross polarization extended attribute model of antenna behavioral scaling, for performance study, test and the authentication of mobile terminal antenna are given security according to the three-dimensional gain parameter of mobile terminal antenna network parameter and antenna and load, source match parameter.Simultaneously, the present invention have also that environmental requirement is low, moderate accuracy, simple and easy to do advantage.

Description of drawings

Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of a part of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:

Fig. 1 is the spherical coordinate system schematic diagram that the present invention uses;

Fig. 2 is the flow chart of the modeling method preferred embodiment of mobile terminal antenna channel cross polarization extended attribute of the present invention;

Fig. 3 is the network diagram of single antenna field port;

Fig. 4 is the network diagram of single antenna road port;

Fig. 5 is the simulation result schematic diagram of the polarization extended attribute of the present invention when single antenna;

Fig. 6 is the theory diagram of the model building device preferred embodiment of mobile terminal antenna channel cross polarization extended attribute of the present invention;

Fig. 7 is the end view of entity antenna among the present invention;

Fig. 8 is the voltage reflection coefficient test result schematic diagram of the present invention when being applied in single antenna.

Embodiment

In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearer, clear, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.

As shown in Figure 1, be the spherical coordinate system schematic diagram that the present invention uses, establish P and be a point in the space, its space coordinates is P (x, y, z), then the P spherical coordinate of ordering is P (r, φ, θ), wherein, r is the distance between initial point O and some P, θ is the folded angle of directed line segment r and z axle forward, φ for from positive z axle from the x axle by the angle that counterclockwise forwards the projection of directed line segment r at coordinate plane xy to and turn over.

As shown in Figure 2, be the flow chart of the modeling method preferred embodiment of mobile terminal antenna channel cross polarization extended attribute of the present invention, present embodiment may further comprise the steps:

Step S001: set up the incident/scattering properties characterization parameter of field port of antenna and the transmission of road port/reflection characteristic characterization parameter;

The incident of field port/scattering properties characterization parameter comprises: the S parameter S of field/road port ₂₁, port scattering parameter S ₂₂, port external source v _gReflection coefficient Γ _gDeng.

As shown in Figure 3, be the network diagram of single antenna field port, among the figure, v _gBe the external source of field port, Γ _gBe external source v _gReflection coefficient.

The S parameter S of above-mentioned field/road port ₂₁By following Formula:

$S_{21}({\mathrm{\&Omega;}}_R,\stackrel{\&RightArrow;}{r})=\stackrel{\&RightArrow;}{G}\left({\mathrm{\&Omega;}}_R\right)e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}\&CenterDot;\stackrel{\&RightArrow;}{H}\left({\mathrm{\&Omega;}}_R\right)$

$=(G_{\mathrm{\&theta;}}{H}_{\mathrm{\&theta;}}+G_{\mathrm{\&phi;}}{H}_{\mathrm{\&phi;}})e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}$

Wherein, Ω _RExpression incoming wave incidence angle;

The space coordinates vector of expression antenna; Φ (Ω _R) expression antenna phase pattern;

The expression wave-number vector;

The vector voltage gain pattern of expression antenna,

θ is the θ coordinate in the spherical coordinate system,

The unit vector of expression θ coordinate, G _θThe θ component of expression vector voltage gain, φ represents the φ coordinate in the spherical coordinate system,

The unit vector of expression φ coordinate, G _φThe φ component of expression vector voltage gain;

Representation space electromagnetic signal channel list diametral voltage transmission coefficient, H _θThe θ component H of representation space electromagnetic signal channel list diametral voltage transmission coefficient _φThe φ component of representation space electromagnetic signal channel list diametral voltage transmission coefficient.

As shown in Figure 4, be the network diagram of single antenna road port, the transmission of road port/reflection characteristic characterization parameter comprises: the active load reflection coefficient Γ of road port ₁, antenna input emission ratio Γ _a

Step S002: according to above-mentioned parameter, set up field/road port transmission/coupled characteristic β;

Field/road port transmission/coupled characteristic β passes through following Formula:

$\mathrm{\&beta;}=\frac{1}{\mathrm{\&Delta;}}=\frac{1}{1-{\mathrm{<figure-callout\; id="11"\; label="S"\; filenames="HDA0000092955590000051.png"\; state="\{\{state\}\}">S</figure-callout>}}_{11}{\mathrm{\&Gamma;}}_1},$ S ₁₁＝Γ _a

Wherein, S ₁₁Be the reflection parameters of road port, S ₁₁=Γ _a, Γ _aBe antenna input emission ratio; Γ ₁Active load reflection coefficient for the sky line port.

Step S003: according to the S parameter S of above-mentioned field/road port ₂₁, set up the cross polarization extended attribute of antenna channel;

The cross polarization extended attribute of antenna channel calculates by following formula:

Wherein, the xOz plane of φ=0 ° expression spherical coordinate system; The yOz plane of φ=90 ° spherical coordinate system.

As shown in Figure 5, it is the simulation result schematic diagram of the polarization extended attribute of the present invention when single antenna, wherein, Fig. 5 (a) and (b) be respectively the polarization extended attribute curve of single antenna when φ=0 ° and φ=90 °, can find out, corresponding different spaces angle θ, XPR is different, be that XPR has spatial selectivity to Space Angle θ, that is to say that XPR has the spatial spread characteristic to Space Angle θ.In like manner, XPR also has the spatial spread characteristic to Space Angle φ.

Step S004: according to the cross polarization extended attribute of above-mentioned field/road port transmission/coupled characteristic β and above-mentioned antenna channel, set up the cross polarization extended attribute model h of antenna channel.

The cross polarization extended attribute model h of antenna channel passes through following Formula:

$h={\mathrm{\&beta;S}}_{21}=\mathrm{\&beta;}\stackrel{\&RightArrow;}{G}\left({\mathrm{\&Omega;}}_R\right)e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}\&CenterDot;\stackrel{\&RightArrow;}{H}\left({\mathrm{\&Omega;}}_R\right)$

$={\mathrm{\&beta;G}}_{\mathrm{\&phi;}}(\mathrm{XPR}\&times;H_{\mathrm{\&theta;}}+H_{\mathrm{\&phi;}})e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}$

As shown in Figure 6, it is the theory diagram of the model building device preferred embodiment of mobile terminal antenna channel cross polarization extended attribute of the present invention, the present embodiment device comprises that parameter is set up module 01, field/road port transmission/coupled characteristic is set up module 02 and model building module 03

Parameter is set up module 01, is used for setting up port incident/scattering properties characterization parameter and a road port transmission/reflection characteristic characterization parameter of antenna;

Field/road port transmission/coupled characteristic is set up module 02, is used for setting up the parameter that module 01 is set up according to parameter, sets up field/road port transmission/coupled characteristic β;

Model building module 03, be used for setting up the parameter that module 03 is set up according to parameter, set up the cross polarization extended attribute of antenna channel, and according to the cross polarization extended attribute of above-mentioned field/road port transmission/coupled characteristic β and above-mentioned antenna channel, set up the cross polarization extended attribute model h of antenna channel.

The below is take the antenna physical model as example, and the end view in conjunction with entity antenna shown in Figure 7 is described further practical application of the present invention.

Among Fig. 7,0 is cylindrical conductor, and 1 is the primary radiation element, and 2.1,2.2,2.3,2.4 are the collateral radiation element, and 3.1,3.2,3.3,3.4 are feed element, and 4 is antenna holder.

(1) antenna model

SA. physical composition

Above-mentioned antenna physical model mainly comprises following 5 parts:

(1) cylindrical conductor 0

Cylindrical conductor 0 is that a Z-direction total length is X0, and radius is the metal cylinder of R0.

(2) the primary radiation element 1

Primary radiation element 1 is that an outer radius is that Rpat, inside radius are that Rpin, Z-direction thickness are the circular ring type metal patch of Hpat; Take the three-dimensional system of coordinate initial point as reference point, primary radiation element 1 is positioned at Z-direction height H rad place, link together with a metal cylinder 1.1 that is threaded structure, the Z-direction height H rad of 1.1 pairs of primary radiation elements 1 of metal cylinder that can be by being threaded structure regulates; The above-mentioned metal cylinder 1.1 that is threaded structure is that a Z-direction height is that Hpin, radius are screwed cylindrical structure on Rpin, the side, and its following table plane is positioned on the XY plane of three-dimensional system of coordinate.

(3) collateral radiation element 2.1,2.2,2.3,2.4

Collateral radiation element 2.1,2.2,2.3,2.4 is that four radiuses are that R1, thickness are the little metal cylinder of H1, the XY plane parallel of following table plane and three-dimensional system of coordinate, and with the distance on above-mentioned XY plane be H0+Hs; Collateral radiation element 2.1,2.2,2.3,2.4 central point are evenly distributed on that the center of circle is positioned on the Z reference axis, radius is on the circle of D0, namely be positioned at separately on positive Y-axis, negative Y-axis, negative X-axis, the positive X-axis, and symmetrically.

(4) feed element 3.1,3.2,3.3,3.4

Feed element 3.1,3.2,3.3, the 3.4th, by four as feeder line, radius is that R0, Z-direction height are the metal cylinder of H0, and the 50 Ω impedance matching feed port that four Z-direction height are Hs form; The following table plane of above-mentioned metal cylinder and the XY plane parallel of three-dimensional system of coordinate, distance is Hs; Above-mentioned 50 Ω impedance matching feed port, one side is positioned on the XY plane, and opposite side is positioned at above-mentioned feeder line following table plane; Feed element 3.1,3.2,3.3,3.4 is to be evenly distributed on that the center of circle is positioned on the Z reference axis, radius is on the circle of D0 equally, namely is positioned at separately on positive Y-axis, negative Y-axis, negative X-axis, the positive X-axis, symmetrically.

(5) antenna holder 4

The prototype of antenna holder 4 is that a Z-direction height is that Hw, outer radius are that Rw, inside radius are that Rn, material are polytetrafluoroethylene (dielectric constant 2.55, the dielectric loss angle is 0.0019) the cylinder ring type structure, the following table plane is positioned on the XY plane of three-dimensional system of coordinate; Simultaneously, in antenna holder 4 inside, on the XY plane, position apart from initial point D0, having dug out four radiuses is that R0, Z-direction height are the cylinder aperture of Hw, and four cylinder apertures are evenly distributed on positive Y-axis, negative Y-axis, negative X-axis, the positive X-axis, symmetrically separately.

SB. the annexation of each chief component:

(1) connection of cylindrical conductor entity

Cylindrical conductor 0 entity is the mounting platform of other entity.Its central point is positioned on the Z axis of three-dimensional system of coordinate.

(2) radiating element entity and feed element entity is connected

Primary radiation unit 1 entity links together with the metal cylinder 1.1 that is threaded structure, and the Z-direction height H rad of 1.1 pairs of primary radiation elements 1 of metal cylinder that can be by being threaded structure regulates; Therefore need to dig out the circle that radius is Rpin at primary radiation unit 1 entity, and finally form circular ring structure.The following table plane that is threaded the metal cylinder 1.1 of structure is positioned on the XY plane of three-dimensional system of coordinate, links together with cylindrical conductor 0 entity, is positioned at antenna holder 4 centers of annular; Simultaneously, owing to the interior ring radius of its radius less than antenna holder 4, thereby between metal cylinder 1.1 and antenna holder 4, still leave an annular space.

The following table plane of collateral radiation element 2.1,2.2,2.3,2.4 entities just in time is positioned at the upper table plane place of antenna holder 4, is connected with cylinder feeder line upper surface in feed element 3.1,3.2,3.3,3.4 entities simultaneously.

Feed element 3.1,3.2,3.3,3.4 entities are arranged in four cylinder apertures that dig out antenna holder 4 inside, the upper table plane of column type feeder line wherein and collateral radiation element 2.1,2.2,2.3,2.4 entities link together, following table plane and 50 Ω impedance matching feed port link together, and the 50 Ω impedance matching feed port other ends then are connected with cylindrical conductor 0 entity.

The following table plane of antenna holder 4 is positioned on the XY plane, is equally to be connected with cylindrical conductor 0 entity.

SC. physical dimension

(1) cylindrical conductor 0

X0＝330mm，R0＝56mm。

(2) the primary radiation element 1

Rpat＝46.08mm，Rpin＝18mm，Hpat＝2.25mm，Hrad＝34.85mm，Hpin＝34.85mm。

(3) collateral radiation element 2.1,2.2,2.3,2.4

R1＝7.2mm，H1＝0.3mm，H0＝29.2mm，Hs＝0.8mm，D0＝50mm。

(4) feed element 3.1,3.2,3.3,3.4

R0＝2.7mm，H0＝29.2mm，Hs＝0.8mm。

(5) antenna holder 4

Hw＝30mm，Rw＝53085mm，Rn＝35mm。

(2) electromagnetic performance

Present embodiment may further comprise the steps:

By Electromagnetic Simulation or actual measurement, obtain the active antenna unit three-dimensional gain pattern of mobile terminal antenna

The reflection parameters S11 of it line port (p1 port), and then can show up/road port transmission/coupled characteristic β:

$\mathrm{\&beta;}=\frac{1}{\mathrm{\&Delta;}}=\frac{1}{1-{\mathrm{<figure-callout\; id="11"\; label="S"\; filenames="HDA0000092955590000051.png"\; state="\{\{state\}\}">S</figure-callout>}}_{11}{\mathrm{\&Gamma;}}_1},$ S ₁₁＝Γ _a

(3) antenna channel polarization characteristic model

Simple in order to describe, this enforcement assumed wireless channel is the free space channel, namely

Wherein,

Be the unit polarization vector of θ direction, φ direction, T is the matrix transpose operator, then can show up/the S parameter S of road port ₂₁:

$S_{21}({\mathrm{\&Omega;}}_R,\stackrel{\&RightArrow;}{r})=\stackrel{\&RightArrow;}{G}\left({\mathrm{\&Omega;}}_R\right)e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}\&CenterDot;\stackrel{\&RightArrow;}{H}\left({\mathrm{\&Omega;}}_R\right)$

Wherein, G _θ, G _φBe respectively the θ of antenna, the voltage gain directional diagram of φ component.

S parameter S according to above-mentioned field/road port ₂₁, can obtain the cross polarization extended attribute of antenna channel:

According to the cross polarization extended attribute of above-mentioned field/road port transmission/coupled characteristic β and antenna channel, finally obtain the cross polarization extended attribute model h of antenna channel:

$h={\mathrm{\&beta;S}}_{21}=\mathrm{\&beta;}\stackrel{\&RightArrow;}{G}\left({\mathrm{\&Omega;}}_R\right)e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}\&CenterDot;\stackrel{\&RightArrow;}{H}\left({\mathrm{\&Omega;}}_R\right)$

$={\mathrm{\&beta;G}}_{\mathrm{\&phi;}}(\mathrm{XPR}\&times;H_{\mathrm{\&theta;}}+H_{\mathrm{\&phi;}})e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}$

As shown in Figure 8, be the voltage reflection coefficient test result schematic diagram of the present invention when being applied in single antenna;

Need to prove that above-described embodiment hypothesis source impedance is mated and take simulation parameter as example, still method of the present invention can also be applied to any occasions that need the simulating mobile terminal antenna effect such as emulation or test.

Above-mentioned explanation illustrates and has described the preferred embodiments of the present invention, but as previously mentioned, be to be understood that the present invention is not limited to the disclosed form of this paper, should not regard the eliminating to other embodiment as, and can be used for various other combinations, modification and environment, and can in invention contemplated scope described herein, change by technology or the knowledge of above-mentioned instruction or association area.And the change that those skilled in the art carry out and variation do not break away from the spirit and scope of the present invention, then all should be in the protection range of claims of the present invention.

Claims (10)

1. the modeling method of a mobile terminal antenna channel cross polarization extended attribute is characterized in that described method comprises based on spherical coordinate system:

Set up port incident/scattering properties characterization parameter and a road port transmission/reflection characteristic characterization parameter of antenna;

According to described parameter, set up field/road port transmission/coupled characteristic β;

According to described parameter and field/road port transmission/coupled characteristic β, set up antenna channel cross polarization extended attribute model h.

2. method according to claim 1 is characterized in that, described port incident/scattering properties characterization parameter comprises: the S parameter S of field/road port ₂₁

3. method according to claim 2 is characterized in that, described road port transmission/reflection characteristic characterization parameter comprises: the active load reflection coefficient Γ of road port ₁, antenna input emission ratio Γ _a

4. method according to claim 2 is characterized in that, the S parameter S of described field/road port ₂₁By following Formula:

$S_{21}({\mathrm{\&Omega;}}_R,\stackrel{\&RightArrow;}{r})=\stackrel{\&RightArrow;}{G}\left({\mathrm{\&Omega;}}_R\right)e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}\&CenterDot;\stackrel{\&RightArrow;}{H}\left({\mathrm{\&Omega;}}_R\right)$

$=(G_{\mathrm{\&theta;}}{H}_{\mathrm{\&theta;}}+G_{\mathrm{\&phi;}}{H}_{\mathrm{\&phi;}})e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}$

Wherein, Ω _RExpression incoming wave incidence angle;

The space coordinates vector of expression antenna; Φ (Ω _R) expression antenna phase pattern; The expression wave-number vector;

The vector voltage gain pattern of expression antenna,

θ is the θ coordinate in the spherical coordinate system, The unit vector of expression θ coordinate, G _θThe θ component of expression vector voltage gain, φ represents the φ coordinate in the spherical coordinate system,

The unit vector of expression φ coordinate, G _φThe φ component of expression vector voltage gain;

Representation space electromagnetic signal channel list diametral voltage transmission coefficient,

H _θThe θ component H of representation space electromagnetic signal channel list diametral voltage transmission coefficient _φThe φ component of representation space electromagnetic signal channel list diametral voltage transmission coefficient.

5. method according to claim 3 is characterized in that, described field/road port transmission/coupled characteristic β passes through following Formula:

$\mathrm{\&beta;}=\frac{1}{\mathrm{\&Delta;}}=\frac{1}{1-S_{11}{\mathrm{\&Gamma;}}_1},$ S ₁₁＝Γ _a

Wherein, S ₁₁Be the scattering parameter of road port, S ₁₁=Γ _a, Γ _aBe antenna input emission ratio; Γ ₁Active load reflection coefficient for the sky line port.

6. method according to claim 4 is characterized in that, and is described according to described parameter and model, sets up antenna channel cross polarization extended attribute model step and specifically may further comprise the steps:

S parameter S according to described field/road port ₂₁, set up the cross polarization extended attribute of antenna channel;

According to the cross polarization extended attribute of described field/road port transmission/coupled characteristic β and described antenna channel, set up the cross polarization extended attribute model h of antenna channel.

7. method according to claim 6 is characterized in that, the cross polarization extended attribute of described antenna channel calculates by following formula:

Wherein, the xOz plane of φ=0 ° expression spherical coordinates; The yOz plane of φ=90 ° spherical coordinates.

8. method according to claim 7 is characterized in that, the cross polarization extended attribute model h of described antenna channel passes through following Formula:

$h={\mathrm{\&beta;S}}_{21}=\mathrm{\&beta;}\stackrel{\&RightArrow;}{G}\left({\mathrm{\&Omega;}}_R\right)e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}\&CenterDot;\stackrel{\&RightArrow;}{H}\left({\mathrm{\&Omega;}}_R\right)$

$={\mathrm{\&beta;G}}_{\mathrm{\&phi;}}(\mathrm{XPR}\&times;H_{\mathrm{\&theta;}}+H_{\mathrm{\&phi;}})e^{-j\stackrel{\&RightArrow;}{k}\&CenterDot;\stackrel{\&RightArrow;}{r}+\mathrm{j\&Phi;}\left({\mathrm{\&Omega;}}_R\right)}$

Wherein, XPR represents XPR (θ, φ=0 °) and XPR (θ, φ=90 °).

9. the model building device of a mobile terminal antenna channel cross polarization extended attribute is characterized in that, described device comprises that parameter is set up module, field/road port transmission/coupled characteristic is set up module and model building module,

Described parameter is set up module, is used for setting up port incident/scattering properties characterization parameter and a road port transmission/reflection characteristic characterization parameter of antenna;

Field/road port transmission/coupled characteristic is set up module, is used for setting up the parameter that module is set up according to described parameter, sets up field/road port transmission/coupled characteristic β;

Model building module is used for setting up parameter and the described field/road port transmission/coupled characteristic that module sets up according to described parameter and sets up the field/road port transmission/coupled characteristic β that sets up in the module, sets up antenna channel cross polarization extended attribute model h.

10. device according to claim 9 is characterized in that, described model building module is also for the cross polarization extended attribute of setting up antenna channel.

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