In order to improve the positioning accuracy of near-field target, a passive location method is proposed by measuring the phase difference, which can be mapped into the time difference after solving the near-field fuzzy phase problem, and then a near filed location model is proposed based on phase measurement. The location model consists of nearby and remote sensor array that is connected with the central processing unit through optical fiber, thus the whole configuration works as a distributed measurement system. By overcoming the loss and fuzzy phase problem, then time difference can be obtained through phase difference indirectly. Such configuration could achieve accurate and quick location of the radiation source. Simulation results indicate that the proposed approach offers higher accuracy, lower loss and simplified large-area construction compared with the location scheme based on time-difference measurements. Therefore, it may find values in the field of electronic countermeasures.%为了进一步提高近场目标的定位精度，该文提出一种将测得的相位差经解模糊算法后转化为时间差进行无源定位的方法，并建立了相应的近场测相定位模型。该模型中由近端阵元和通过光纤连接到中心处理单元的远端阵元形成分布式协同测量系统，解决了损耗和相位差模糊的问题，从而可以通过相位差测量来间接获得时差，最终实现对辐射源的快速精确定位。仿真结果表明该方法与直接测量时差的定位法相比，具有精度高、损耗低且布站容易的特点，在电子对抗领域具有一定的参考价值。
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