This paper presents air gap aperture coupled microstrip antenna for dual-band operation over the frequency range of (2.9 to 6.0 GHz). This antenna differs from any other microstrip antenna with their feeding structure...This paper presents air gap aperture coupled microstrip antenna for dual-band operation over the frequency range of (2.9 to 6.0 GHz). This antenna differs from any other microstrip antenna with their feeding structure of the radiating patch element. Input signal couples to the radiating patch trough the aperture that exists on the ground plane of microstrip feed line. The dual-band achieved by variation of air gap [2 mm to 6 mm] between single patch antenna and aper-ture coupled microstrip antenna. The main advantage of this type antenna is increased the bandwidth of the antenna as compared to a single layered patch antenna. The two resonant frequencies can vary over a wide frequency range and the input impedance is easily matched for both frequencies. The obtain ratios of resonance frequencies are variable from 2.1 GHz to 1.1 GHz with increasing the air gap between single patch and aperture coupled microstrip antenna. The measured return loss [–14 dB] exhibits an impedance bandwidth of 35%. The input impedance and VSWR return loss have been measured with the help of Network analyzer.展开更多
The progress in dual-band dual-polarization(DBDP)shared-aperture antennas for the synthetic aperture radar(SAR)application in the last decade is reviewed.Several designs of DBDP SAR antenna arrays are introduced with ...The progress in dual-band dual-polarization(DBDP)shared-aperture antennas for the synthetic aperture radar(SAR)application in the last decade is reviewed.Several designs of DBDP SAR antenna arrays are introduced with their main performances,then their comparison is summarized.In addition,some techniques enhancing DBDP antenna performances are presented.展开更多
为满足卫星通信中双频共口径、高集成、多波束等要求,提出了一种基于封装天线(Antenna in Package, AIP)架构的Ka频段收发共口径多波束相控阵天线。天线以双频堆叠微带单元的形式实现了收发共口径,并通过天线集成滤波器保证了收发通道...为满足卫星通信中双频共口径、高集成、多波束等要求,提出了一种基于封装天线(Antenna in Package, AIP)架构的Ka频段收发共口径多波束相控阵天线。天线以双频堆叠微带单元的形式实现了收发共口径,并通过天线集成滤波器保证了收发通道的隔离度优于44 dB。在±60°范围内,64元接收阵增益优于17.4 dB,128元发射阵增益优于20.2 dB,具有良好的波束扫描性能。为获得收发多波束一片式集成,在收发(Transmitter/Receiver, T/R)组件中使用晶圆级三维系统集成封装(Three Dimensions System in Package, 3D-SIP)并结合微凸点的制备技术,保证了系统级芯片(System-on-Chip, SOC)的高密度二次集成。高低频混压技术同样被应用于阵面、收发网络、控制供电链路的多层板集成。所提多波束的相控阵天线新架构具有高密度集成TR组件、多波束一体化、高效散热等特点,在卫星通信和数据链等方面具有广阔的应用前景。展开更多
设计了一种工作于X波段的基于共享孔径Fabry-Perot(F-P)谐振腔结构的宽带高增益磁电偶极子微带天线,并设计了三种不同尺寸的双层频率选择表面(FSS)单元,通过共享孔径布阵组成了超材料覆层.利用三种FSS单元的相位补偿特性,有效拓展了覆...设计了一种工作于X波段的基于共享孔径Fabry-Perot(F-P)谐振腔结构的宽带高增益磁电偶极子微带天线,并设计了三种不同尺寸的双层频率选择表面(FSS)单元,通过共享孔径布阵组成了超材料覆层.利用三种FSS单元的相位补偿特性,有效拓展了覆层天线的增益带宽.实测和仿真结果均表明,加载超材料覆层后,磁电偶极子天线在7.8—12.3 GHz内S_(11)<-10 d B,相对带宽达到44.7%,覆盖整个X波段.天线增益在7.9—12.1 GHz内均有明显的提高,最大提高了7 d B.相较于传统的F-P谐振腔结构覆层天线,设计的基于共享孔径的F-P谐振型超材料覆层天线能够明显拓展天线增益带宽,在新型宽带高增益天线设计方面具有广阔的应用前景.展开更多
文摘This paper presents air gap aperture coupled microstrip antenna for dual-band operation over the frequency range of (2.9 to 6.0 GHz). This antenna differs from any other microstrip antenna with their feeding structure of the radiating patch element. Input signal couples to the radiating patch trough the aperture that exists on the ground plane of microstrip feed line. The dual-band achieved by variation of air gap [2 mm to 6 mm] between single patch antenna and aper-ture coupled microstrip antenna. The main advantage of this type antenna is increased the bandwidth of the antenna as compared to a single layered patch antenna. The two resonant frequencies can vary over a wide frequency range and the input impedance is easily matched for both frequencies. The obtain ratios of resonance frequencies are variable from 2.1 GHz to 1.1 GHz with increasing the air gap between single patch and aperture coupled microstrip antenna. The measured return loss [–14 dB] exhibits an impedance bandwidth of 35%. The input impedance and VSWR return loss have been measured with the help of Network analyzer.
基金supported by the National High-Technology Research and Development (863)Project of China (No.2007AA12Z125)the National Natural Science Foundation of China (Grant No.60871030)the Specialized Research Fund of Doctoral Programs,Ministry of Education of China (No.20050280016).
文摘The progress in dual-band dual-polarization(DBDP)shared-aperture antennas for the synthetic aperture radar(SAR)application in the last decade is reviewed.Several designs of DBDP SAR antenna arrays are introduced with their main performances,then their comparison is summarized.In addition,some techniques enhancing DBDP antenna performances are presented.
文摘为满足卫星通信中双频共口径、高集成、多波束等要求,提出了一种基于封装天线(Antenna in Package, AIP)架构的Ka频段收发共口径多波束相控阵天线。天线以双频堆叠微带单元的形式实现了收发共口径,并通过天线集成滤波器保证了收发通道的隔离度优于44 dB。在±60°范围内,64元接收阵增益优于17.4 dB,128元发射阵增益优于20.2 dB,具有良好的波束扫描性能。为获得收发多波束一片式集成,在收发(Transmitter/Receiver, T/R)组件中使用晶圆级三维系统集成封装(Three Dimensions System in Package, 3D-SIP)并结合微凸点的制备技术,保证了系统级芯片(System-on-Chip, SOC)的高密度二次集成。高低频混压技术同样被应用于阵面、收发网络、控制供电链路的多层板集成。所提多波束的相控阵天线新架构具有高密度集成TR组件、多波束一体化、高效散热等特点,在卫星通信和数据链等方面具有广阔的应用前景。
文摘设计了一种工作于X波段的基于共享孔径Fabry-Perot(F-P)谐振腔结构的宽带高增益磁电偶极子微带天线,并设计了三种不同尺寸的双层频率选择表面(FSS)单元,通过共享孔径布阵组成了超材料覆层.利用三种FSS单元的相位补偿特性,有效拓展了覆层天线的增益带宽.实测和仿真结果均表明,加载超材料覆层后,磁电偶极子天线在7.8—12.3 GHz内S_(11)<-10 d B,相对带宽达到44.7%,覆盖整个X波段.天线增益在7.9—12.1 GHz内均有明显的提高,最大提高了7 d B.相较于传统的F-P谐振腔结构覆层天线,设计的基于共享孔径的F-P谐振型超材料覆层天线能够明显拓展天线增益带宽,在新型宽带高增益天线设计方面具有广阔的应用前景.
