Contact-less near-field measurement of RF phased array antenna mismatches
Contact-less near-field measurement of RF phased array antenna mismatches
复制标题
射频相控阵天线失配的非接触式近场测量
DOI：
10.1109/ets.2017.7968216
复制
发表时间：
2017
期刊：
影响因子：
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通讯作者：
S. Ozev
中科院分区：
文献类型：
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作者：
Maryam Shafiee;S. Ozev
未来的射频收发器有望集成整个系统，从基带到天线。许多新兴应用使用波束成形，这需要射频相控阵和多个天线集成在同一个芯片上。将天线集成到与相控阵和其他电子设备相同的芯片上提出了一个测试挑战，因为输出是在空中组合的，不再能够通过物理连接到测试设备来分离。提出了一种测量射频相控阵天线增益和相位失配的新型非接触式测试方法。所提出的方法是基于使用完全特征的接收天线来捕获发射天线的组合电磁输出。近场分析采用去耦方法来确定增益和相位失配，以便在基带中对其进行校准。近场测量在生产测试环境中更可取，因为它们不需要在负载板上实现大的物理距离。在近场模拟中对两个单元组成的相控阵进行了模拟和评估，验证了我们的测试方法。
Future RF transceivers are expected to integrate the entire system, from baseband to antenna. Many emerging applications use beam forming, which necessitates RF phased arrays and multiple antennas integrated on the same die. Integration of antennas onto the same die as the phased array and other electronics presents a test challenge since the output is combined in the air and no longer can be separated by physically connecting to the test equipment. This paper presents a novel contact-less test method for measuring the gain and phase mismatch of RF phased array antennas. The proposed method is based on using fully characterized receiver antennas to capture the combined EM output of the transmitter antennas. Near-field analysis is applied with a decoupling approach to determine both gain and phase mismatches so they can be calibrated in the baseband. Near-field measurements are preferable in the production test environment since they do not require large physical distances to be implemented on the load board. A phased array consisting of two elements is modeled and evaluated in near field to verify our test method.