A Millimeter-Wave Self-Mixing Array With Large Gain and Wide Angular Receiving Range
A Millimeter-Wave Self-Mixing Array With Large Gain and Wide Angular Receiving Range
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DOI：
10.1109/tap.2017.2780897
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发表时间：
2018-02
影响因子：
5.7
通讯作者：
J. Kornprobst;Thomas J. Mittermaier;T. Eibert
中科院分区：
文献类型：
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作者：
J. Kornprobst;Thomas J. Mittermaier;T. Eibert
提出了自混合天线阵的概念，分析了自混合天线阵在较宽的角度范围内具有大增益的有利性能。大增益是通过具有大阵元间距的天线阵获得的，其中所有阵元信号在整个角度接收范围内被近似相干地组合。这一功能是通过自混合原理实现的，其中通过中频(IF)阵列因子推导出准确的描述。为了验证的目的，制作了$4×2$自混合阵列，并在34~39 GHz的频率范围内进行了测量。为实现大带宽、大角度接收范围，专门研制了多谐振毫米波微带贴片天线。通过两个寄生贴片和合适的谐振模辐射特性获得了较宽的波束宽度。接收信号的自混合通过具有优化工作点的肖特基二极管在每个天线单元处实现。然后，在中频处组合和测量下转换的阵元信号。与传统的阵列馈电技术相比，接收功率在很大的角度范围内显著增加。仿真结果得到了测量的验证，具有很好的一致性。
The concept of self-mixing antenna arrays is presented and analyzed with respect to its beneficial behavior of large gain over a wide angular range. The large gain is attained by an antenna array with large element spacing, where all array element signals are combined approximately coherently over the entire angular receiving range. This functionality is achieved by the self-mixing principle, where an exact description via an intermediate frequency (IF) array factor is derived. For verification purposes, a $4\times 2$ self-mixing array is fabricated and measured in the frequency range from 34 to 39 GHz. A multiple-resonance millimeter-wave microstrip patch antenna has been especially developed to achieve large bandwidth and a wide angular receiving range. The broad beamwidth is achieved by two parasitic patches and suitable radiation characteristics of the resonant modes. The self-mixing of the receive signal is realized at each antenna element by a Schottky diode with an optimized operating point. The down-converted array element signals are then combined and measured at the IF. The receive power is increased significantly over a large angular range compared with conventional array feeding techniques. The simulation results are verified by measurements, which show very good agreement.