【作者】 张遒逸； 李顺礼； 赵洪新； 殷晓星；

【Author】 Qiuyi Zhang;Shunli Li;Hongxin Zhao;Xiaoxing Yin;State Key Laboratory of Millimeter Waves,Southeast University;

【机构】 东南大学毫米波国家重点实验室；

【摘要】 本文提出了一种以时域方法分析与设计的、可以实现超宽带脉冲收发的单脉冲天线。该天线基于传输表面波的单导体结构,将导体两侧的电场隔离开,并通过末端开路形成两元辐射阵。馈电使用的超宽带和差网络可以使天线在4 GHz到12 GHz内形成和、差波束方向图,并在绝大部分频率具有高于10 dB的插损以及20 dB以上的隔离度。该天线可较好地收发宽带脉冲,从收发脉冲的时域变化中提取出方向信息。仿真与时域分析给出了时域与频域的和、差方向图,验证了设计的有效性。更多还原

【Abstract】 In this paper,an ultra-wideband monopulse antenna is proposed based on a surface wave structure,and the antenna is designed and analyzed in time domain.A metal wall is aligned along the central conductor of the open-circuited line for isolation of electric field on two sides of the conductor,and two-element radiation is therefore established.An ultra-wideband monopulse network is employed,and monopulse radiation patterns are obtained from 4 GHz to 12 GHz.Meanwhile,reflection below-10 dB and isolation over 20 dB are achieved in most of the frequencies.The Goubau line structure provides capability of radiating or receiving pulse signals,and angular information could be extracted from the time-domain variation of the pulse signals.Time-and frequency-domain patterns is provided by the simulation and time-domain analysis,verifying this design.更多还原