Characterization of Intermodulation Distortion in Reconfigurable Liquid Metal Antennas
Characterization of Intermodulation Distortion in Reconfigurable Liquid Metal Antennas
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DOI：
10.1109/lawp.2017.2786078
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发表时间：
2018-02
影响因子：
4.2
通讯作者：
Meng Wang;Ian M. Kilgore;M. Steer;Jacob J. Adams
中科院分区：
文献类型：
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作者：
Meng Wang;Ian M. Kilgore;M. Steer;Jacob J. Adams
研究了无源和可调谐液态金属天线产生的互调失真。比较了四种单极子，包括无源铜单极子、变容管调谐铜单极子、无源线性单极子和采用电化学控制毛细管(ECC)的可调谐单极子。使用双音失真测试来评估线性度，在双音失真测试中，频率接近的两个基音导致由频差分隔的高于和低于原始音调的频率的三阶互调音调。无源Lm单极子与无源铜单极子具有相当的线性度，而ECC调谐的Lm单极子的线性度至少比有源变容二极管单极子的线性度好40d B。与有源变容二极管调谐天线(24dBm)相比，可重新配置的LM天线在故障前还可以处理更高的功率(31dBm)。
The intermodulation distortion produced by passive and tunable liquid metal (LM) antennas is investigated. Four kinds of monopoles, including a passive copper monopole, a varactor-tuned copper monopole, a passive LM monopole, and a tunable LM monopole using electrochemically controlled capillarity (ECC), are compared for their linearity and power-handling capabilities. Linearity is assessed using a two-tone distortion test, in which two fundamental tones close in frequency result in third-order intermodulation tones at frequencies above and below the original tones separated by the frequency difference. The passive LM monopole has comparable linearity to the passive copper monopole, while the linearity of the ECC-tuned LM monopole is at least 40 dB better than that of the active varactor monopole. The reconfigurable LM antenna also handles higher power (31 dBm) before failure than does the active varactor-tuned antenna (24 dBm).