【摘要】 本文采用了新的介质加载方法来设计卫星定位系统中手持机的天线。与传统的空心四臂螺旋天线相比,介质加载四臂螺旋天线的体积大大缩小,只有8mm*8mm*18mm,仿真结果表明,介质加载天线的增益为1.2dB,左右旋极化隔离度达到29dB,3dB轴比波束宽度为127度,前后比小于27.3dB。实测的设计频点处的回波损耗仅为-23.3dB,亦即驻波比VSW R=1.147。更多还原

【Abstract】 A new dielectric-loaded method is adopted to design the handheld antenna for global satellite positioning system in this paper. Comparing with the conventional air-loaded quadrifilar helix antenna,the size of the dielectric-loaded quadrifilar helix antenna(DQHA) reduces greatly.The simulated results show the polarization isolation is 29dB and the gain of the DQHA is 1.2dB.The 3dB beamwidth is 127 degrees and the ratio of the front and the back radiation is less than 27.3dB.Its measured return loss at the designed frequency is-23.3dB,VSWR=1.147.更多还原