一种用于呼吸监测的超宽带正弦天线设计

摘要

根据现有非接触式生命体呼吸监测应用市场的需求,本文设计并制作了一种小型化超宽带双臂正弦天线,采用馈电巴伦的方式进行平衡馈电,为了实现其单向辐射性能,采用平底型反射腔.测试结果表明,在6GHz～9GHz频带内该天线的电压驻波比小于2.0:1,而且其带内辐射方向图的前后比大于12dB,天线在通频带内的增益均大于6.5dBi.该天线适用于近距离超宽带生命体监测系统.%According to the demand of the existing non-contact life breathing monitoring market, this paper designs and fabricates a miniaturized ultra-wideband dual-arm sinusoidal antenna, which adopts the feeding balun method for balanced feeding and adds a flat-bottom reflective cavity in the design aiming to realize its unidirectional radiation performance. The test results show that the VSWR of the antenna is less than 2.0:1 in the 6GHz～ 9GHz band, and the front-to-back ratio of the in-band radiation pattern is greater than 12dB, and the gain of the antenna in the passband is greater than 6.5dBi. The antenna is fully suitable for use in close-range ultra-wideband life monitoring systems.