针对目前射频识别(RFID)标签天线制备成本高、工艺复杂等问题, 提出微滴按需喷射3D打印与化学沉积技术相结合制备半波偶极子天线的方法。利用构建的气动式双喷头微滴喷射系统, 采用试验研究的方法, 对系统按需喷射条件下产生硝酸银与抗坏血酸微滴的一致性以及基板运行速度对成线均匀性的影响进行研究, 并对成形导线的电阻率进行测试; 在此基础上设计、仿真和制备了半波偶极子天线, 对其性能参数进行了测试。结果表明: 系统产生的微滴均匀性较好; 基板速度小于或等于0.5 mm/s时, 硝酸银成线边缘光滑度较好; 成形导线的电导率为1.57×10-5 Ω·m; 打印成形的半波偶极子天线谐振频率、谐振点回波损耗S11参数等与仿真结果具有较好的一致性。为RFID标签天线提供了一种低成本制备方法。

Considering the problems of RFID (Radio Frequency Identification) tag antennas, including high manufacturing cost and complicated process, a method for fabrication of half wave dipole antennas combining 3D micro-droplet jet printing with chemical reaction deposition was put forward. Method: a constructed double nozzle pneumatic micro-droplet ejection device was used to carry out an experimental research on micro-droplet consistency of silver nitrate and ascorbic acid produced under the required ejection conditions the impacts of substrate speed on the line forming uniformity, and conducted a test in resistivity of the formed conductor; based on this, a half wave dipole antenna was designed, simulated and fabricated, and a test was conducted in its performance parameters. The results show that micro-droplet produced by the system is in good uniformity; when substrate speed is less than or equal to 0.5 mm/s, the line forming margin of silver nitrate is relatively smooth, and conductivity of the formed conductor is 1.57×10-5 Ω·m; parameters of the printed half wave dipole antenna, such as the resonant frequency, resonance point return loss (S11) etc, are in good consistency with the simulation results. Hence, the test provides a low-cost method for fabrication of RFID tag antennas.