频率范围为DC～28GHz的低通滤波器，阻带抑制高，广泛地应用于多个领域。
| 型号 | 通带（GHz） | 插损（dB，最大值） | 驻波（最大值） | 阻带衰减（dB） | 连接器 |
| QLF-2186-30 | 1.5~2.186 | 2 | 1.6 | 30@2.37~3GHz | SMA |
| QLF-2500-65 | DC~2.5 | 3 | 2 | 65@3-13GHz | N |
| QLF-2700-90 | DC~2.7 | 2 | 2 | 90@4.5-8.4GHz | SMA |
| QLF-4000-50 | DC~4 | 0.8 | 1.5 | 50@8GHz | SMA |
| QLF-4800-35 | DC~4.8 | 1.5 | 2 | 35@6GHz | SMA |
| QLF-5000-40 | DC~5 | 2 | 2 | 40@6-25GHz | SMA |
| QLF-6000-20 | 0.5~6 | 2 | 1.8 | 20@6.5GHz | SMA |
| QLF-8000-40 | DC~8 | 2 | 2 | 40@9~25GHz | SMA |
| QLF-9000-60 | DC~9 | 1 | 1.6 | 60@14~17GHz | SMA |
| QLF-10000-40 | DC~10 | 2 | 2 | 40@13-18GHz | SMA |
| QLF-11000-35 | DC~11 | 2 | 2 | 35@12GHz | 2.92mm |
| QLF-11500-45 | DC~11.5 | 2 | 2 | 45@12.8-13.3GHz | 2.92mm |
| QLF-11500-40 | DC~11.5 | 2 | 1.5 | 40@12.3-13.3GHz | 2.92mm |
| QLF-12000-40 | DC~12 | 2 | 2 | 40@13.5-25GHz | SMA |
| QLF-13000-40 | DC~13 | 1.5 | 2 | 40@15-25GHz | 2.92mm |
| QLF-15000-40 | DC~15 | 2 | 2 | 40@18-23GHz | 2.92mm |
| QLF-16000-40 | DC~16 | 2 | 2 | 40@18-25GHz | SMA |
| QLF-18000-40 | DC~18 | 2 | 2 | 40@20-38GHz | 2.92mm |
| QLF-20000-60 | DC~20 | 1 | 2 | 60@23~40GHz | 2.92mm |
| QLF-25000-40 | DC~25 | 2 | 2 | 40@28-30GHz | 2.92mm |
| QLF-28000-30 | DC~28 | 2 | 2 | 30@30-38GHz | 2.92mm |
