一种新型宽带双频板基天线设计与实现
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摘要
研究并设计一种新型宽带双频单极子天线,工作频段为900 MHz和1. 8 GHz,可在以物联网为代表的自持供电传感节点等系统中应用。基于单极子天线尺寸设计原理分析的基本结果,通过对天线双臂在不同等效电长度下的辐射特性研究,开展G型天线的优化仿真设计和研发。利用矢量网络分析仪和3D天线自动测试系统得到仿真和测试吻合的结果。实测结果表明:天线的半功率波束宽度分别能够达到73°和126°,天线的反射系数小于-10 dB的阻抗带宽分别是90 MHz(860～950 MHz)和0. 6 GHz(1. 55～2. 15 GHz),相对带宽分别是10%和33. 3%,不圆度分别低于2. 6和5. 7 d B,电压驻波比均小于2. 04。该天线实现对目标频段范围内的完全覆盖,得到大的波束宽度、宽带、双频等特性,天线结构简单,易于加工,实用性强。
A new type of broadband dual-frequency monopole antenna was investigated and designed. The working frequency range was 900 MHz and 1. 8 GHz. It could be applied in a system such as a self-sustaining power sensor node represented by the Internet of Things. Based on the basic results of size design principle analysis of the monopole antenna,the optimization simulation design and development of the G-shaped antenna was carried out by studying the radiation characteristics of the antenna arms under different equivalent electrical lengths. The results of simulation and test were anastomotic by vector network analyzer and 3 D antenna automatic test system. The measurement results show that the half power beam width( HPBW) of the antenna can reach 73° and 126° respectively. The impedance bandwidths of the antenna with reflection coefficient less than-10 d B are 90 MHz at frequency range from 860 MHz to 950 MHz and 0. 6 GHz from 1. 55 GHz to 2. 15 GHz respectively. Relative bandwidth is 10% and 33. 3% respectively. The roundness is lower than 2. 6 d B and 5. 7 d B respectively. Voltage standing wave ratio is below 2. 04. The antenna achieves complete coverage in the target frequency range,and has characteristics such as large HPBW,broadband and dual-frequency. The antenna is simple in structure,easy to process and practical.
A new type of broadband dual-frequency monopole antenna was investigated and designed. The working frequency range was 900 MHz and 1. 8 GHz. It could be applied in a system such as a self-sustaining power sensor node represented by the Internet of Things. Based on the basic results of size design principle analysis of the monopole antenna,the optimization simulation design and development of the G-shaped antenna was carried out by studying the radiation characteristics of the antenna arms under different equivalent electrical lengths. The results of simulation and test were anastomotic by vector network analyzer and 3 D antenna automatic test system. The measurement results show that the half power beam width( HPBW) of the antenna can reach 73° and 126° respectively. The impedance bandwidths of the antenna with reflection coefficient less than-10 d B are 90 MHz at frequency range from 860 MHz to 950 MHz and 0. 6 GHz from 1. 55 GHz to 2. 15 GHz respectively. Relative bandwidth is 10% and 33. 3% respectively. The roundness is lower than 2. 6 d B and 5. 7 d B respectively. Voltage standing wave ratio is below 2. 04. The antenna achieves complete coverage in the target frequency range,and has characteristics such as large HPBW,broadband and dual-frequency. The antenna is simple in structure,easy to process and practical.
引文
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[3] Lu X,Wang P,Niyato D,et al. Wireless Networks With RF Energy Harvesting:A Contemporary Survey[J]. IEEE Communications Surveys&Tutorials,2017,17(2):757-789.
[4] Shrestha S,Noh S K,Choi D Y. Comparative Study of Antenna Designs for RF Energy Harvesting[J]. International Journal of Antennas and Propagation,2013,2013(10):188-192.
[5] Liu W C,Wu C M. Dual-band CPW-fed G-shaped monopole antenna for 2. 4/5GHz WLAN application[J]. Piers Online,2007,3(7):1114-1118.
[6] Roy B,Bhattacharya A,Karmakar R,et al. A compact wideband monopole antenna designed for wireless applications[C]//2016 Loughborough Antennas&Propagation Conference(LAPC). IEEE,2017:1-4.
[7] Leino M K,Partanen H,Lindvall N,et al. Wideband monopole antenna for RF power scavenger[C]//IEEE International Symposium on Antennas and Propagation&Usnc/ursi National Radio Science Meeting. IEEE,2016:1789-1790.
[8] Bakkali A,Pelegri-Sebastia J,Sogorb T,et al. A DualBand Antenna for RF Energy Harvesting Systems in Wireless Sensor Networks[J]. Journal of Sensors,2016,2016(Article ID 5725836):1-8.
[9] Pham B L,Pham A V. Triple bands antenna and high efficiency rectifier design for RF energy harvesting at 900,1900and 2400 MHz[C]//2013 IEEE MTT-S International Microwave Symposium Digest(MTT). IEEE,2014:1-3.
[10] Ho D K,Kharrat I,Ngo V D,et al. Dual-band rectenna for ambient RF energy harvesting at GSM 900 MHz and 1800MHz[C]//IEEE International Conference on Sustainable Energy Technologies. IEEE,2017:306-310.
[11] Xin G L,Xu J P. Wideband miniature G-shaped antenna for dual-band WLAN applications[J]. Electronics Letters,2007,43(24):1330-1332.
[12]郑庚琪,孙保华.新型宽带小型化微带天线[J].西安电子科技大学学报,2017,44(4):47-50.
[13]房国志,侯瑞强,张玉成.超宽带天线的一种设计方法[J].西安电子科技大学学报,2018,45(1):83-87.
[14] Hammerstad E O. Equations for Microstrip Circuit Design[C]//1975 5th European Microwave Conference. IEEE,2007:268-272.