2.4 GHz antenna array using vector modulator-based active phase shifters for beamforming
2.4 GHz antenna array using vector modulator-based active phase shifters for beamforming
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DOI：
10.1049/iet-map.2010.0005
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发表时间：
2011-01
影响因子：
1.7
通讯作者：
F. Hutu;D. Cordeau;J. Paillot
中科院分区：
文献类型：
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作者：
F. Hutu;D. Cordeau;J. Paillot
本研究提出的分析和实验结果的2.4 GHz天线阵列使用矢量调制器作为有源移相器波束形成。通过使用这种有源移相器，可以实现连续控制的360°相移范围，从而产生高效的波束成形架构。为了证明该系统的鲁棒性，首先进行了理论分析，以量化矢量调制器I/Q失配对获得的增益和相移的影响。以相同的方式，矢量调制器噪声命令电压的影响也通过系统仿真来量化。2.4GHz矢量调制器的实验结果表明，最大相对增益误差接近2.5%，绝对相位误差小于3°。测得的1 dB输出压缩点为-6 dBm。包括一个由矢量调制器控制的四个“贴片”天线阵列的原型的测量也在消声室中进行。结果表明，测量和理论辐射模式之间的良好协议。
This study presents the analysis and the experimental results of a 2.4 GHz antenna array using vector modulators working as active phase shifters for beamforming. With the use of such an active phase shifter, a continuously controlled 360° phase shifting range can be achieved leading to an efficient beamforming architecture. To show the robustness of this system, a theoretical analysis is first performed in order to quantify the impact of vector modulators I/Q mismatch on the obtained gains and phase shifts. In the same way, the impact of the vector modulators noisy command voltages is also quantified by system simulations. The experimental results of the 2.4 GHz vector modulators show a maximum relative gain error close to 2.5% and an absolute phase error less than 3°. The measured 1 dB output compression point is -6 dBm. Measurements of the prototype including an array of four 'patch' antennas controlled by the vector modulators were also performed in an anechoic chamber. The results show good agreement between measured and theoretical radiation patterns.