CN101459477B - Automatic test method for mobile phone antenna radiation performance - Google Patents

Abstract

The invention belongs to the technical field of 3G mobile phones, in particular to a test method for mobile phone antenna radiation performances, which comprises firstly testing the total radiation power of a mobile phone, calculating the gain of a mobile phone antenna according to the total radiation power, setting the gain value of the mobile phone antenna as the loss value of up link and down link of a terminal all-purpose tester, setting a reference power value as a critical reference power value of the omnidirectional sensitivity measurement, wherein the set reference power value will be extremely close to the critical reference power value therefore, thereby guaranteeing the chain path in the test process connecting. The test method can be used to find the reference power value meeting the requirement only by testing twice, simultaneously, and can test the total radiation power of the mobile phone antenna, thereby increasing the test efficiency and the test stability.

Description

A kind of automatic test method for mobile phone antenna radiation performance

Technical field

The invention belongs to the 3G mobile technical field, relate to a kind of method of testing of mobile phone antenna radiation performance.

Background technology

The radiance of antenna for mobile phone directly affects communication quality, tests its radiance quickly and accurately and has crucial meaning.CTIA (Cellular Telecommunications & InternetAssociation) standard points out that total radiant power TRP and total omnidirectional sensitivity TIS are two important indicators weighing mobile phone antenna performance effectively.Wherein total radiant power TRP can weigh the emission situation of mobile phone comprehensively, and total omnidirectional sensitivity TIS can weigh the receptivity of mobile phone comprehensively.The computing formula of total radiant power TRP is:

$\mathrm{TRP}\≅\frac{\mathrm{\π}}{2\mathrm{NM}}\underset{i=1}{\overset{N-1}{\mathrm{\Σ}}}\underset{j=0}{\overset{M-1}{\mathrm{\Σ}}}[{\mathrm{EiRP}}_{\mathrm{\θ}}({\mathrm{\θ}}_i,{\mathrm{\φ}}_j)+{\mathrm{EiRP}}_{\mathrm{\φ}}({\mathrm{\θ}}_i,{\mathrm{\φ}}_j)]\sin \left({\mathrm{\θ}}_i\right)---\left(1\right)$

In the formula (1), θ and φ are the coordinate figures of spherical coordinate system, and its span is 0 °≤θ≤180 °, 0 °≤φ≤360 °.N and M are respectively the number of sampling of θ and φ direction.EiRP θ and EiRP φ are the θ of antenna and the EiRP of φ polarised direction.EiRP is the product of antenna input power (P) and this antenna gain (G), promptly

EIRP＝P*G (2)

The computing formula of TIS is:

$\mathrm{TIS}\≅\frac{2\mathrm{NM}}{\mathrm{\π}\underset{i=1}{\overset{N-1}{\mathrm{\Σ}}}\underset{j=0}{\overset{m-1}{\mathrm{\Σ}}}[\frac{1}{{\mathrm{EIS}}_{\mathrm{\θ}}({\mathrm{\θ}}_i,{\mathrm{\φ}}_j)}+\frac{1}{{\mathrm{EIS}}_{\mathrm{\φ}}({\mathrm{\θ}}_i,{\mathrm{\φ}}_j)}]\sin \left({\mathrm{\θ}}_i\right)}---\left(3\right)$

In the formula (3), EIS effectively waits direction and sensitivity, and this value can be measured by TD-SCDMA terminal comprehensive test instrument.N, M, θ and φ are identical with implication in the formula (1).

For testing mobile phone total radiant power TRP and total omnidirectional sensitivity TIS, only need test antenna input power and mobile phone to receive reference sensitivity.Utilize comprehensive test instrument testing mobile phone transmitting power relatively simple, but in the prior art when testing mobile phone receives reference sensitivity, the easy chain rupture of mobile phone; Be easy to just can rebulid link for the 2G mobile phone; But in measuring the omnidirectional sensibility process, link just will link again and need drive mobile phone again in case disconnection just is difficult to connect again for 3G mobile; So the method for testing mobile phone antenna radiation performance efficient when the test 3G mobile is lower in the prior art, is unfavorable for test.

Summary of the invention

The method that the purpose of this invention is to provide a kind of antenna radiation performance of testing mobile phone fast and accurately, this method of testing had both guaranteed can chain rupture in when test, has improved testing efficiency again.

The method of testing mobile phone antenna radiation performance provided by the present invention, carry out as follows:

(1) puts mobile phone in the maximum transmission power state;

(2) spectrum analysis module from the antenna for mobile phone testing apparatus reads the maximum power measurement result, and calculates the maximum power of mobile phone actual transmission and the difference DELTA P between the expection measurement result;

(3) if the difference DELTA P between the maximum power of mobile phone actual transmission and the expection measurement result greater than expecting the total radiant power error amount; The uplink and downlink line loss of adjustment antenna for mobile phone testing apparatus; Continue step (2), step (3); Difference DELTA P between the maximum power of mobile phone actual transmission and expection measurement result is less than expection total radiant power error amount, otherwise directly gets into next step;

(4) reference power value with the antenna for mobile phone testing apparatus is made as the reference power value that total omnidirectional sensitivity is tested;

(5) error rate of testing mobile phone judges whether the error rate surpasses omnidirectional sensibility test error value (0.001);

(6), otherwise increase reference power value if the error rate less than omnidirectional sensibility test error value, reduces reference power value; Total omnidirectional sensitivity until finding the error rate to equal the measured power point of omnidirectional sensibility test error value, is calculated by the data processing unit of antenna for mobile phone testing apparatus in repeating step (5) and rapid (6).

The principle of mobile phone antenna radiation performance method of testing provided by the present invention is: at first test out the mobile phone total radiant power; Calculate the gain of antenna for mobile phone according to this total radiant power; The yield value of antenna for mobile phone is made as the uplink and downlink line loss value of terminal comprehensive tester; Reference power value is made as the critical reference performance number that omnidirectional sensibility is measured, and the reference power value that is provided with like this will be very near the critical reference performance number, so can guarantee that link can not break off in test process.Adopt general only need the survey of this method of testing just can find satisfactory reference power value twice, can record the total radiant power of antenna for mobile phone again simultaneously, thereby improve testing efficiency and stable testing property.

The invention has the beneficial effects as follows, can correctly estimate the radiance of antenna for mobile phone, improve the production efficiency of antenna for mobile phone guaranteeing that link fast, does not accurately test out the total radiant power and the total omnidirectional sensitivity of 3G mobile under the disconnection.

Description of drawings

Fig. 1 is a handset antenna radiation testing hardware catenation principle sketch map;

Fig. 2 is the mobile phone antenna radiation performance test flow chart;

Fig. 3 is mobile phone antenna radiation performance figure.

Embodiment

Below in conjunction with accompanying drawing, the enforcement of automatic test method for mobile phone antenna radiation performance of the present invention is described.Fig. 1 is a handset antenna radiation testing hardware catenation principle sketch map.AV4943 is a kind of TD integration test instrument, can test the RF index of dut terminal (mobile phone).Dut terminal is placed on the turntable in the darkroom, and the AV4943 comprehensive test instrument is through the antenna in darkroom emission or receive signal and communicate with mobile phone, thus measurement total radiant power TRP and total omnidirectional sensitivity TIS.Fig. 2 is the mobile phone antenna radiation performance test flow chart.Flow chart according to Fig. 2 gets final product the automatic test method for mobile phone antenna radiation performance that embodiment of the present invention provided.Can be known by Fig. 2: the method step that the present invention adopted is following:

(1) puts mobile phone in the maximum transmission power state;

(2) spectrum analysis module from the antenna for mobile phone testing apparatus reads the maximum power measurement result, and calculates the maximum power of mobile phone actual transmission and the difference DELTA P between the expection measurement result;

(3) if the difference DELTA P between the maximum power of mobile phone actual transmission and the expection measurement result greater than expecting total radiant power error amount (can be made as 1); The uplink and downlink line loss of adjustment antenna for mobile phone testing apparatus; Continue step (2), step (3), up to the difference DELTA P between the maximum power of mobile phone actual transmission and the expection measurement result less than expecting total radiant power error amount otherwise directly get into next step;

(4) (this value is decided according to the concrete minimum sensitivity reference level critical value of mobile phone, generally gets-108dBm) reference power value of antenna for mobile phone testing apparatus to be made as the reference power value of total omnidirectional sensitivity test;

(5) error rate of testing mobile phone judges whether the error rate surpasses omnidirectional sensibility test error value (0.001);

(6), otherwise increase reference power value if the error rate less than omnidirectional sensibility test error value, reduces reference power value; Total omnidirectional sensitivity until finding the error rate to equal the measured power point of omnidirectional sensibility test error value, is calculated by the data processing unit of antenna for mobile phone testing apparatus in repeating step (5) and rapid (6).

Fig. 3 is the mobile phone antenna radiation performance figure that adopts automatic test method for mobile phone antenna radiation performance provided by the present invention to obtain.Figure comparison rule shown in this figure, the mobile phone antenna radiation performance of being tested meets the requirements.

Claims (1)

1. automatic test method for mobile phone antenna radiation performance is characterized in that carrying out as follows:

(1) puts mobile phone in the maximum transmission power state;

(2) spectrum analysis module from the antenna for mobile phone testing apparatus reads the maximum power measurement result, and calculates the maximum power of mobile phone actual transmission and the difference

between the expection measurement result;

(3) if the difference

between the maximum power of mobile phone actual transmission and the expection measurement result greater than expecting the total radiant power error amount; The uplink and downlink line loss of adjustment antenna for mobile phone testing apparatus; Continue step (2), step (3); Difference

between the maximum power of mobile phone actual transmission and expection measurement result is less than expection total radiant power error amount, otherwise directly gets into next step;

(4) reference power value with the antenna for mobile phone testing apparatus is made as the reference power value that total omnidirectional sensitivity is tested;

(5) error rate of testing mobile phone judges whether the error rate surpasses omnidirectional sensibility test error value 0.001;

(6), otherwise increase reference power value if the error rate less than omnidirectional sensibility test error value, reduces reference power value; Repeating step (5) and step (6) until finding the error rate to equal the measured power point of omnidirectional sensibility test error value, are calculated total omnidirectional sensitivity by the data processing unit of antenna for mobile phone testing apparatus.

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