设计了一款双频带宽带双极化定向电磁偶极子天线。首先,采用最基本的电磁偶极子天线模型,通过对偶极子天线的形状进行调整以及增加Г形寄生枝节实现了双频段单极化定向电磁偶极子天线。其次,将两个单极化电磁偶极子天线十字交叉放置。最...设计了一款双频带宽带双极化定向电磁偶极子天线。首先,采用最基本的电磁偶极子天线模型,通过对偶极子天线的形状进行调整以及增加Г形寄生枝节实现了双频段单极化定向电磁偶极子天线。其次,将两个单极化电磁偶极子天线十字交叉放置。最后,通过两个高度不同的Г形探针分别对两个天线进行耦合馈电,实现双频宽带双极化定向辐射特性。根据仿真结果,对天线模型进行了加工和测试。仿真和实测结果表明:天线在低频段0.8~0.96 GHz和高频段1.7~2.7 GHz内反射系数的模值均小于-10 d B,所对应端口隔离度分别大于20 d B和25d B,天线的测试峰值增益在低频和高频段分别为5.5 d Bi和8.2 d Bi。该天线可应用在无线通讯系统中。展开更多
We propose and investigate a methodology based on convolved electric and magnetic currents for the generation of multi-band responses over a space-shared radiating surface.First,a single wideband antenna operation pri...We propose and investigate a methodology based on convolved electric and magnetic currents for the generation of multi-band responses over a space-shared radiating surface.First,a single wideband antenna operation principle based on inter-leaved dipole and slot modes is studied and analyzed using full-wave simulations followed by a qualitative time domain analysis.Subsequently,a 2×2 dual-band radiating unit is conceived and developed by closely arranging single wideband antennas.In this case,multimode resonances are generated in a lower frequency band by a proper convolving and coupling of the magnetic and electric currents realized in the gaps between the antennas and on the surface of the antennas,respectively.This methodology can be deployed repeatedly to build up a self-scalable topology by reusing the electromagnetically(EM)connected radiating surfaces and gaps be-tween the radiating units.Due to the efficient reuse of the electromagnetic region for the development of multiband radiation,a high aperture-reuse efficiency is achieved.Finally,as a proof of concept,a 2×4 dual-band array operating in Ku-and Ka-bands is devel-oped and fabricated by a linear arrangement of the two developed radiating units.Our measurement results show that the proposed antenna array provides impedance and gain bandwidths of 30%and 25.4%in the Ku-band and 10.65%and 8.52%in the Ka-band,respectively.展开更多
A filtering antenna is a device with both filtering and radiating capabilities.It can be used to reduce the cross-band mutual coupling between the closely spaced elements operating at different frequency bands.We revi...A filtering antenna is a device with both filtering and radiating capabilities.It can be used to reduce the cross-band mutual coupling between the closely spaced elements operating at different frequency bands.We review the authors’work on filtering antenna designs and three related dual-band base-station antenna arrays as application examples.The filtering antenna designs include single-and dual-polarized filtering patch antennas,a single-polarized omni-directional filtering dipole antenna,and a dual-polarized filtering dipole antenna for the base station.The filtering antennas in this paper feature an innovative concept of eliminating extra filtering circuits,unlike other available antennas.For each design,the filtering structure is finely integrated with the radiators or feeding lines.As a result,the proposed designs have the advantages of compact size,simple structure,good in-band radiation performance,and low levels of loss,and do not contain complicated filtering circuits.Based on the proposed filtering antennas,single-and dual-polarized dual-band antenna arrays were developed.Separate antenna elements at different frequency bands were used to achieve the dual-band performance.The cross-band mutual couplings between the elements at different bands were reduced substantially using the antenna inherent filtering performance.The dual-band arrays exhibited better performance as compared to typical industrial products.Some of the proposed technologies have been transferred into the industry.展开更多
文摘设计了一款双频带宽带双极化定向电磁偶极子天线。首先,采用最基本的电磁偶极子天线模型,通过对偶极子天线的形状进行调整以及增加Г形寄生枝节实现了双频段单极化定向电磁偶极子天线。其次,将两个单极化电磁偶极子天线十字交叉放置。最后,通过两个高度不同的Г形探针分别对两个天线进行耦合馈电,实现双频宽带双极化定向辐射特性。根据仿真结果,对天线模型进行了加工和测试。仿真和实测结果表明:天线在低频段0.8~0.96 GHz和高频段1.7~2.7 GHz内反射系数的模值均小于-10 d B,所对应端口隔离度分别大于20 d B和25d B,天线的测试峰值增益在低频和高频段分别为5.5 d Bi和8.2 d Bi。该天线可应用在无线通讯系统中。
文摘We propose and investigate a methodology based on convolved electric and magnetic currents for the generation of multi-band responses over a space-shared radiating surface.First,a single wideband antenna operation principle based on inter-leaved dipole and slot modes is studied and analyzed using full-wave simulations followed by a qualitative time domain analysis.Subsequently,a 2×2 dual-band radiating unit is conceived and developed by closely arranging single wideband antennas.In this case,multimode resonances are generated in a lower frequency band by a proper convolving and coupling of the magnetic and electric currents realized in the gaps between the antennas and on the surface of the antennas,respectively.This methodology can be deployed repeatedly to build up a self-scalable topology by reusing the electromagnetically(EM)connected radiating surfaces and gaps be-tween the radiating units.Due to the efficient reuse of the electromagnetic region for the development of multiband radiation,a high aperture-reuse efficiency is achieved.Finally,as a proof of concept,a 2×4 dual-band array operating in Ku-and Ka-bands is devel-oped and fabricated by a linear arrangement of the two developed radiating units.Our measurement results show that the proposed antenna array provides impedance and gain bandwidths of 30%and 25.4%in the Ku-band and 10.65%and 8.52%in the Ka-band,respectively.
基金supported by the National Natural Science Foundation of China(Nos.61725102 and 61701182)the China Postdoctoral Science Foundation(Nos.2017M610521 and 2018T110866)。
文摘A filtering antenna is a device with both filtering and radiating capabilities.It can be used to reduce the cross-band mutual coupling between the closely spaced elements operating at different frequency bands.We review the authors’work on filtering antenna designs and three related dual-band base-station antenna arrays as application examples.The filtering antenna designs include single-and dual-polarized filtering patch antennas,a single-polarized omni-directional filtering dipole antenna,and a dual-polarized filtering dipole antenna for the base station.The filtering antennas in this paper feature an innovative concept of eliminating extra filtering circuits,unlike other available antennas.For each design,the filtering structure is finely integrated with the radiators or feeding lines.As a result,the proposed designs have the advantages of compact size,simple structure,good in-band radiation performance,and low levels of loss,and do not contain complicated filtering circuits.Based on the proposed filtering antennas,single-and dual-polarized dual-band antenna arrays were developed.Separate antenna elements at different frequency bands were used to achieve the dual-band performance.The cross-band mutual couplings between the elements at different bands were reduced substantially using the antenna inherent filtering performance.The dual-band arrays exhibited better performance as compared to typical industrial products.Some of the proposed technologies have been transferred into the industry.
