【摘要】 根据椭圆函数响应，采用相对介电常数为37的高品质因数微波介质材料，该文设计了一种低损耗、连体式四级介质滤波器。通过1-4谐振器之间使用级联四元组(CQ)电容加载耦合，经优化后滤波器中心频率为1 268 MHz,工作带宽为25 MHz,插入损耗≤2.5 dB,回波损耗≥18 dB,近端带外抑制≥40 dB。根据仿真模型结构参数，优化成型和金属化工艺，制备得到的样品，通过可靠性环境试验表明，该滤波器的性能测试结果与仿真结果吻合良好。更多还原

【Abstract】 A filter was designed based on elliptic function responses and fabricated using high-Q-factor monolithic ceramic materials with a relative permittivity of 37. A SMD monolithic four-cavity dielectric filter with low insertion loss was designed and manufactured by leveraging cascaded quadruplet coupling between 1 and 4 resonator, The performance indexes of the optimized filter are as follows: a center frequency of 1 268 MHz, operating bandwidth of 25 MHz, insertion loss ≤2.5 dB, return loss ≥18 dB, and out-of-band suppression ≥40 dB. On the basis of the structural parameters of the simulation model, samples were manufactured using the optimized metallization and molding process. The performance test results conform to the simulation results, demonstrating high reliability.更多还原