Broadband Predistortion Circuit Using Zero Bias Diodes for Radio over Fiber Systems

被引:20
|
作者
Zhu, Ran [1 ]
Zhang, Xiupu [1 ,2 ]
Hraimel, Bouchaib [1 ]
Shen, Dongya [2 ]
Liu, Taijun [3 ]
机构
[1] Concordia Univ, Dept Elect & Comp Engn, Adv Photon Syst Lab, Montreal, PQ H3G 1M8, Canada
[2] Yunnan Univ, Sch Informat Sci & Engn, Yunnan 650091, Peoples R China
[3] Ningbo Univ, Coll Informat Sci & Engn, Ningbo 315211, Zhejiang, Peoples R China
基金
加拿大自然科学与工程研究理事会;
关键词
RF photonics; microwave photonics; radio over fiber systems; broadband analog predistortion circuit; wireless communications; miniature hybrid microwave integrated circuit; MODULATION;
D O I
10.1109/LPT.2013.2281409
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A low-cost broadband analog predistortion circuit (PDC) is designed and experimentally verified in a radio over fiber (RoF) system. A miniature hybrid microwave integrated circuit technique is used to reduce the size and parasitics of PDC. Only two zero bias GaAs beam lead detector diodes and capacitors are used in the PDC. The diodes can be biased at <3 mA due to zero bias characteristic so that power consumption is reduced. No broadband matching network is required because of high series resistance of the zero bias diodes. The linearization performance is evaluated using an RoF system without and with the PDC. It is shown that the PDC improves the input 1-dB compression power by 0.4-2.2 dB from 7 to 18 GHz; and spurious free dynamic ranges are improved by similar to 10 dB from 7 to 14 GHz and similar to 6 dB from 15 to 18 GHz, limited by fifth order nonlinear distortion.
引用
收藏
页码:2101 / 2104
页数:4
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