With the rapid development of smart terminals and infrastructures,as well as diversified applications(e.g.,autonomous driving,virtual and augmented reality,space-air-ground integrated networks)with colorful demands,cu...With the rapid development of smart terminals and infrastructures,as well as diversified applications(e.g.,autonomous driving,virtual and augmented reality,space-air-ground integrated networks)with colorful demands,current networks(e.g.,4G and 5G networks)may not be well suited to the requirements of novel applications and services.Recently,efforts from both the industry and academia have been made on the research into 6G networks,artificial intelligence(AI)will play a pivotal role in the design and optimization of 6G networks.展开更多
Beam synthesizing antenna arrays are essentially demanded for on-chip millimeter wave and terahertz systems.In order to achieve a par-ticular radiation beam,specific amplitude and phase distributions are required for ...Beam synthesizing antenna arrays are essentially demanded for on-chip millimeter wave and terahertz systems.In order to achieve a par-ticular radiation beam,specific amplitude and phase distributions are required for all the array elements,which is conventionally realized through a properly designed feeding network.In the current work,a low-loss feeding network design approach based on epsilon-near-zero(ENZ)medium was proposed for large-scale antenna arrays with different beam requirements.Due to the infinite wavelength within the ENZ medium,a newly-discovered stair-like resonant mode was adopted for assigning a uniform phase distribution to each element,while the amplitudes and positions of these elements were optimized for generating particular beams.To implement the design philosophy in a low-loss manner,a hollow air-filled waveguide near cutoff fre-quency was employed to emulate the ENZ medium,and the bulk sil-icon microelectromechanical systems(MEMS)micromachining tech-nology was utilized for chip-scale integration.As a specific example,a low-sidelobe antenna array at 60.0 GHz was designed,which realized an impedance bandwidth of 2.57%,a gain of 13.6 dBi and a sidelobe level as low as-20.0 dB within the size of 0.5×3.4λ_(0)(2).This method is also compatible with a variety of applications,such as the high-directivity antenna array,non-diffractive Bessel beam antenna array,and so on.Based on this innovative concept of applying ENZ medium to the on-chip antenna array,it shows the advantages of simple struc-ture and low loss for on-chip beam synthesis without complex lossy feeding networks.展开更多
文摘With the rapid development of smart terminals and infrastructures,as well as diversified applications(e.g.,autonomous driving,virtual and augmented reality,space-air-ground integrated networks)with colorful demands,current networks(e.g.,4G and 5G networks)may not be well suited to the requirements of novel applications and services.Recently,efforts from both the industry and academia have been made on the research into 6G networks,artificial intelligence(AI)will play a pivotal role in the design and optimization of 6G networks.
基金supported by National Natural Science Foundation of China(NSFC)under grant U22B2016,62022045,the National Key Research and Development Program of China under Grant 2021YFA0716600the Shenzhen Science and Technology Program under Grants JSGG20210802153800002.
文摘Beam synthesizing antenna arrays are essentially demanded for on-chip millimeter wave and terahertz systems.In order to achieve a par-ticular radiation beam,specific amplitude and phase distributions are required for all the array elements,which is conventionally realized through a properly designed feeding network.In the current work,a low-loss feeding network design approach based on epsilon-near-zero(ENZ)medium was proposed for large-scale antenna arrays with different beam requirements.Due to the infinite wavelength within the ENZ medium,a newly-discovered stair-like resonant mode was adopted for assigning a uniform phase distribution to each element,while the amplitudes and positions of these elements were optimized for generating particular beams.To implement the design philosophy in a low-loss manner,a hollow air-filled waveguide near cutoff fre-quency was employed to emulate the ENZ medium,and the bulk sil-icon microelectromechanical systems(MEMS)micromachining tech-nology was utilized for chip-scale integration.As a specific example,a low-sidelobe antenna array at 60.0 GHz was designed,which realized an impedance bandwidth of 2.57%,a gain of 13.6 dBi and a sidelobe level as low as-20.0 dB within the size of 0.5×3.4λ_(0)(2).This method is also compatible with a variety of applications,such as the high-directivity antenna array,non-diffractive Bessel beam antenna array,and so on.Based on this innovative concept of applying ENZ medium to the on-chip antenna array,it shows the advantages of simple struc-ture and low loss for on-chip beam synthesis without complex lossy feeding networks.
