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首页> 外文期刊>Microwave and optical technology letters >AN INTEGRATED 'SENSE-AND-COMMUNICATE' BROAD-/NARROW-BAND OPTICALLY CONTROLLED RECONFIGURABLE ANTENNA FOR COGNITIVE RADIO SYSTEMS
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AN INTEGRATED 'SENSE-AND-COMMUNICATE' BROAD-/NARROW-BAND OPTICALLY CONTROLLED RECONFIGURABLE ANTENNA FOR COGNITIVE RADIO SYSTEMS

机译：认知无线电系统的集成式“传感与通信”宽带/窄带光学控制可重构天线

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摘要

An optically controlled reconfigurable antenna with operability in both wide and narrow bands is investigated for cognitive radio systems. The proposed antenna consists of a U-shaped patch for the spectrum sensing over a wide band and two open annuli for communication in narrow sub-bands within the frequency range of 3.1-10.6 GHz. The integration of narrow and wide bands devices makes the whole antenna structure compact with a dimension of 40 x 38.5 mm(2). With an inherent property of being electromagnetically transparency, four appropriately placed laser-controlled photoconductive silicon switches are adopted to achieve reconfigurable frequency characteristics in the four bands of 5.8-6.8, 6.7-7.3, 7.0-8.4, and 7.9-9.2 GHz with the reflection coefficient below -10 dB. The wide-narrowband antenna is fed by two coplanar waveguides with the isolation of S-21<-15 dB, effectively allowing the spectrum sensing and the communication to operate simultaneously. An antenna prototype has been fabricated, and close agreement is observed between the measured and simulated results. (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1016-1023, 2015
机译：对于认知无线电系统，研究了在宽频带和窄频带均具有可操作性的光控可重配置天线。拟议的天线由一个U形贴片和两个开放式环形天线组成，用于在宽带上进行频谱感测，两个环形天线用于在3.1-10.6 GHz频率范围内的窄子带中进行通信。窄带和宽带设备的集成使整个天线结构紧凑，尺寸为40 x 38.5 mm（2）。由于具有固有的电磁透明性，因此采用了四个适当放置的激光控制的光导硅开关，以实现在5.8-6.8、6.7-7.3、7.0-8.4和7.9-9.2 GHz四个频带中具有反射的可重构频率特性系数低于-10 dB。宽频带天线由两个共面波导供电，隔离度为S-21 <-15 dB，有效地使频谱感测和通信同时进行。已经制造出天线原型，并且在测量结果和模拟结果之间观察到紧密的一致性。 （c）2015年Wiley Periodicals，Inc.微波技术通讯Lett 57：1016-1023，2015

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