Filtering antennas for energy harvesting in wearable systems
Filtering antennas for energy harvesting in wearable systems
复制标题
用于可穿戴系统能量收集的滤波天线
DOI：
10.1002/jnm.2661
复制
发表时间：
2019-07
期刊：
影响因子：
--
通讯作者：
Wei Gao
中科院分区：
文献类型：
--
作者：
Dong Yazhou;Gao Steven;Luo Qi;Dong Shi-wei;Wei Gao
可穿戴系统对于残疾人和老龄化人口的未来智能家居护理非常重要。最大的挑战之一是电力供应。一种解决方案是开发适合于无线地提供电力的能量收集系统。传统的能量采集系统中的匹配网络和滤波器占用了大量的空间，引入了额外的损耗，降低了总效率。提出了一种适用于可穿戴能量采集系统的新型滤波天线。所研制的天线具有宽带工作、谐波抑制、体积小、成本低等优点。首先，提出了一种新的宽带滤波天线建模和设计方法，以实现复输入阻抗。通过调节谐振器的外部品质因数和耦合系数，可以实现复阻抗匹配。然后，利用特征模态理论对滤波天线进行了模态分析。为了验证设计概念，设计并制作了一个C波段具有复阻抗的圆极化滤波天线。结果表明，该器件的阻抗带宽大于14.5%，峰值增益大于8.5dBi。建议的天线是共轭匹配的整流电路在5.8 GHz和失配的二次谐波频率，以抑制谐波再辐射，导致一个紧凑的整流天线结构。
Wearable systems are important for future smart home care for the disabled and ageing population. One of the key challenges is the power supply. One solution is to develop an energy harvesting system suitable for providing power wirelessly. The matching network and filter in traditional energy harvesting system occupy lots of space, introduce additional losses, and reduce the total efficiency. This paper presents a novel filtering antenna suitable for wearable energy harvesting systems. The developed antenna has a broadband operation, harmonics suppression, compact size, and low cost. Firstly, a novel technique for broadband filtering antenna modeling and design in order to realize complex input impedance is presented. By adjusting the external quality factors and coupling coefficients of the resonators, complex impedance matching can be realized. Then, the theory of characteristic mode is used for the modal analysis of the filtering antenna. To verify the design concept, a C‐band circularly polarized filtering antenna with complex impedance is designed and fabricated. The results show that the impedance bandwidth is more than 14.5% with a peak gain higher than 8.5 dBi. The proposed antenna is conjugate matched to the rectifying circuit at 5.8 GHz and mismatched at the second harmonic frequency to suppress the harmonic reradiation, leading to a compact rectenna structure.
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DOI：
10.1109/mwsym.2010.5516915
发表时间：
2010-05
期刊：
2010 IEEE MTT-S International Microwave Symposium
影响因子：
--
作者：
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通讯作者：
Y. Yusuf;X. Gong
影响因子：
4
作者：
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影响因子：
5.7
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1109/comcas.2017.8244796
发表时间：
2017-11
期刊：
2017 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)
影响因子：
--
作者：
Pavel Schilingovski;V. Vulfin;S. Sayfan-Altman;R. Shavit
通讯作者：
Pavel Schilingovski;V. Vulfin;S. Sayfan-Altman;R. Shavit