In this paper,a terahertz slotted waveguide array antenna is designed based on photonic crystal,which can realize efficient radiation of terahertz waves.The electromagnetic wave is fed from the rectangular waveguide a...In this paper,a terahertz slotted waveguide array antenna is designed based on photonic crystal,which can realize efficient radiation of terahertz waves.The electromagnetic wave is fed from the rectangular waveguide at the bottom of the antenna,coupled to photonic crystal waveguide through photonic crystal cavity,and radiated outward through slots at the top layer of antenna.The simulation results show that the antenna achieves a peak gain of 13.45 dBi at 360 GHz,a half-power beam width of 10.9°,and a side lobe level of−13.9 dB.The antenna based on photonic crystal has the advantages of low profile,low loss,and high radiation efficiency,which can be applied to terahertz wireless communication systems.展开更多
A 3D-printed dual-band dual-polarization gap waveguide(GWG)slot antenna array is presented for Ku-band satellite communications(SATCOMs)in this paper.Two stacked GWGs excite the quasi-TE420 and quasi-TE240 modes in th...A 3D-printed dual-band dual-polarization gap waveguide(GWG)slot antenna array is presented for Ku-band satellite communications(SATCOMs)in this paper.Two stacked GWGs excite the quasi-TE420 and quasi-TE240 modes in the cavity separately through orthogonal slots.An unequal power divider with a large power division ratio is proposed based on a ridge gap waveguide(RGW).Two power tapering distribution networks are realized for dual polarizations,and the sidelobe level(SLL)is suppressed.The antenna is fabricated in parts by direct metal laser sintering(DMLS),and the whole antenna is obtained by screw assembly.The measured impedance bandwidth well covers both the transmitting band(Tx,from 14.0 GHz to 14.5 GHz)and the receiving band(Rx,from 12.25 GHz to 12.75 GHz)required for Ku-band SATCOMs.Measurement results show that the maximum gain reaches 25.6 dBi,and that the radiation efficiency of the dual-band is>72%.展开更多
A novel broadband metasurface (MTS) antenna array with high front-to-back ratio (FBR) is proposed for 28 GHz millimeter-wave applications. With slot pairs loaded on patch cells, an aperturecoupled slotted-mushroom MTS...A novel broadband metasurface (MTS) antenna array with high front-to-back ratio (FBR) is proposed for 28 GHz millimeter-wave applications. With slot pairs loaded on patch cells, an aperturecoupled slotted-mushroom MTS antenna is designed to obtain broadband radiation characteristicswith a compact size. To suppress the backward radiation of this antenna, the printed ridge gapwaveguide (PRGW) technology with a perfect magnetic conductor (PMC) shielding made ofmushroom unit-cells underneath the microstrip feeding line is applied. On this basis, a 4×4 MTSantenna array with the PRGW feed network is developed. Simulated results show that the FBR canbe highly improved by over 16 dB within the entire bandwidth. To validate the design, a prototypeof the proposed antenna is fabricated. Measured results show that an FBR greater than 28 dB canbe obtained over a 24% impedance bandwidth (from 24.9 GHz to 31.7 GHz) with the reflectioncoefficient less than 10 dB. The measured antenna gain ranges from 17 dBi to 19.2 dBi and thecorresponding measured aperture efficiencies are 35% and 45.6%. The measured results alsosuggest that the proposed MTS antenna possesses -35 dB cross-polarization level and stable radiation patterns. In addition, the proposed antenna remains a very low profile of 1.7 mm (0.17λ_(0) at28 GHz). All the achieved features indicate that the proposed MTS antenna is an importantcandidate for B5G and 6G wireless communication.展开更多
本文设计了一个共面波导馈电的矩形天线,通过在矩形贴片天线辐射体上开双L缝隙使其同时工作于无线局域网(WLAN)频段和全球微波互联接入(Wi MAX)频段,通过仿真得知该天线在2.8GHz处具有最大的增益7.68 d Bi,在4.8GHz处具有最大的回波损耗...本文设计了一个共面波导馈电的矩形天线,通过在矩形贴片天线辐射体上开双L缝隙使其同时工作于无线局域网(WLAN)频段和全球微波互联接入(Wi MAX)频段,通过仿真得知该天线在2.8GHz处具有最大的增益7.68 d Bi,在4.8GHz处具有最大的回波损耗-35d Bi,具有良好的双频特性。展开更多
为了克服传统波导缝隙阵列天线重量大、副瓣偏高等问题,提出一种小型化、低副瓣X波段波导缝隙阵列天线的设计方法。首先采用高斯分布实现其幅度加权,快速完成低副瓣波导缝隙阵列天线的设计;然后结合HFSS软件对传统压缩波导的窄边尺寸进...为了克服传统波导缝隙阵列天线重量大、副瓣偏高等问题,提出一种小型化、低副瓣X波段波导缝隙阵列天线的设计方法。首先采用高斯分布实现其幅度加权,快速完成低副瓣波导缝隙阵列天线的设计;然后结合HFSS软件对传统压缩波导的窄边尺寸进行优化,减小窄边尺寸;同时采用3D打印技术制造ABS塑料波导缝隙框架和金属电镀工艺实现天线的加工,通过仿真分析和实物加工测试验证了所设计天线的有效性。所设计的天线方位面副瓣电平可达到-25 d B以下,重量从25 kg减小到2.5 kg,减重比达到了90%。最后,详细分析了不同金属电镀层厚度对天线性能的影响。展开更多
基金supported by the National Natural Science Foundation of China(No.62375031)the Basic Research Project of Chongqing Science and Technology Commission(No.CSTC-2021jcyj-bsh0194)the Science and Technology Research Program of Chongqing Municipal Education Commission(No.KJQN202200602)。
文摘In this paper,a terahertz slotted waveguide array antenna is designed based on photonic crystal,which can realize efficient radiation of terahertz waves.The electromagnetic wave is fed from the rectangular waveguide at the bottom of the antenna,coupled to photonic crystal waveguide through photonic crystal cavity,and radiated outward through slots at the top layer of antenna.The simulation results show that the antenna achieves a peak gain of 13.45 dBi at 360 GHz,a half-power beam width of 10.9°,and a side lobe level of−13.9 dB.The antenna based on photonic crystal has the advantages of low profile,low loss,and high radiation efficiency,which can be applied to terahertz wireless communication systems.
基金Project supported by the National Natural Science Foundation of China(Nos.62321001 and 62301065)。
文摘A 3D-printed dual-band dual-polarization gap waveguide(GWG)slot antenna array is presented for Ku-band satellite communications(SATCOMs)in this paper.Two stacked GWGs excite the quasi-TE420 and quasi-TE240 modes in the cavity separately through orthogonal slots.An unequal power divider with a large power division ratio is proposed based on a ridge gap waveguide(RGW).Two power tapering distribution networks are realized for dual polarizations,and the sidelobe level(SLL)is suppressed.The antenna is fabricated in parts by direct metal laser sintering(DMLS),and the whole antenna is obtained by screw assembly.The measured impedance bandwidth well covers both the transmitting band(Tx,from 14.0 GHz to 14.5 GHz)and the receiving band(Rx,from 12.25 GHz to 12.75 GHz)required for Ku-band SATCOMs.Measurement results show that the maximum gain reaches 25.6 dBi,and that the radiation efficiency of the dual-band is>72%.
基金National Natural Science Foundation of China(62288101,62001342)National Key Research and Development Program of China(2021YFA1401001)+1 种基金Key Research and Development Program of Shaanxi(2021TD-07)Fundamental Research Funds for the Central Universities(20103224952).
文摘A novel broadband metasurface (MTS) antenna array with high front-to-back ratio (FBR) is proposed for 28 GHz millimeter-wave applications. With slot pairs loaded on patch cells, an aperturecoupled slotted-mushroom MTS antenna is designed to obtain broadband radiation characteristicswith a compact size. To suppress the backward radiation of this antenna, the printed ridge gapwaveguide (PRGW) technology with a perfect magnetic conductor (PMC) shielding made ofmushroom unit-cells underneath the microstrip feeding line is applied. On this basis, a 4×4 MTSantenna array with the PRGW feed network is developed. Simulated results show that the FBR canbe highly improved by over 16 dB within the entire bandwidth. To validate the design, a prototypeof the proposed antenna is fabricated. Measured results show that an FBR greater than 28 dB canbe obtained over a 24% impedance bandwidth (from 24.9 GHz to 31.7 GHz) with the reflectioncoefficient less than 10 dB. The measured antenna gain ranges from 17 dBi to 19.2 dBi and thecorresponding measured aperture efficiencies are 35% and 45.6%. The measured results alsosuggest that the proposed MTS antenna possesses -35 dB cross-polarization level and stable radiation patterns. In addition, the proposed antenna remains a very low profile of 1.7 mm (0.17λ_(0) at28 GHz). All the achieved features indicate that the proposed MTS antenna is an importantcandidate for B5G and 6G wireless communication.
文摘为了克服传统波导缝隙阵列天线重量大、副瓣偏高等问题,提出一种小型化、低副瓣X波段波导缝隙阵列天线的设计方法。首先采用高斯分布实现其幅度加权,快速完成低副瓣波导缝隙阵列天线的设计;然后结合HFSS软件对传统压缩波导的窄边尺寸进行优化,减小窄边尺寸;同时采用3D打印技术制造ABS塑料波导缝隙框架和金属电镀工艺实现天线的加工,通过仿真分析和实物加工测试验证了所设计天线的有效性。所设计的天线方位面副瓣电平可达到-25 d B以下,重量从25 kg减小到2.5 kg,减重比达到了90%。最后,详细分析了不同金属电镀层厚度对天线性能的影响。
