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Focus 提供最深入的宽带基波和谐波无源调谐器产品组合。无源阻抗调谐器在给定频率范围内在史密斯圆图上产生可控的反射因子(阻抗)。Focus 使用两种基本技术：
从100MHz到120GHz，我们使用滑动螺钉技术，将反射探头插入低损耗开槽传输线。
对于10MHz至170MHz的频率，我们采用集总元件技术，将可变电容器与优化长度的同轴电缆连接起来。
大多数 Focus 无源调谐器使用持久耐用的射频探头，这些探头旨在实现最佳调谐精度，并且没有杂散谐振。多个探头的组合在一个调谐器中提供超宽带覆盖。所有 Focus 无源调谐器均由 LAN 控制，并包括板载阻抗合成固件。
Sub 18GHz 调谐器列表:
| 型 | 最小频率 | 最大频率 | 驻波比 | 连接器类型 | 类型 |
| C101 | 0.1 GHz | 1 GHz | ≥ 10:1 (typ. 40:1) | 7/16, APC-7, N | f0 |
| C1260 | 6 GHz | 12 GHz | ≥ 40:1 (typ. 60:1) | 3.5mm | f0 |
| C1804 | 0.4 GHz | 18 GHz | ≥ 30:1 (typ. 40:1) | APC-7, N | f0 |
| C1806 | 0.6 GHz | 18 GHz | ≥ 10:1 (typ. 20:1) | APC-7, N | f0 |
| C1806S | 0.6 GHz | 18 GHz | ≥ 10:1 (typ. 20:1) | APC-7, N | f0 (Shielded) |
| C1807 | 0.7 GHz | 18 GHz | ≥ 10:1 (typ. 25:1) | APC-7, N | f0 |
| C1808 | 0.8 GHz | 18 GHz | ≥ 10:1 (typ. 15:1) | APC-7, N | f0 |
| C1818 | 1.8 GHz | 18 GHz | ≥ 10:1 (typ. 20:1) | APC-7, N | f0 |
| C302 | 0.2 GHz | 3 GHz | ≥ 10:1 (typ. 30:1) | 7/16, APC-7, N | f0 |
| C304 | 0.4 GHz | 3 GHz | ≥ 10:1 (typ. 40:1) | 7/16, APC-7, N | f0 |
| C308 | 0.8 GHz | 3 GHz | ≥ 10:1 (typ. 20:1) | 7/16, APC-7, N | f0 |
| C606 | 0.6 GHz | 6 GHz | ≥ 30:1 (typ. 40:1) | 7/16, APC-7, N | f0 |
| C606S | 0.6 GHz | 6 GHz | ≥ 30:1 (typ. 40:1) | 7/16, APC-7, N | f0 (Shielded) |
| C804 | 0.4 GHz | 8 GHz | ≥ 10:1 (typ. 20:1) | 7/16, APC-7, N | f0 |
| C806 | 0.6 GHz | 8 GHz | ≥ 50:1 (typ. 80:1) | 3.5mm | f0 |
| C806R | 0.6 GHz | 8 GHz | ≥ 30:1 (typ. 35:1) | 7/16, APC-7, N | f0 |
| C806RS | 0.6 GHz | 8 GHz | ≥ 30:1 (typ. 35:1) | 7/16, APC-7, N | f0 (Shielded) |
| C806S | 0.6 GHz | 8 GHz | ≥ 50:1 (typ. 80:1) | 3.5mm | f0 (Shielded) |
| C807 | 0.8 GHz | 7 GHz | ≥ 30:1 (typ. 35:1) | 7/16, APC-7, N | f0 |
| C808 | 0.8 GHz | 8 GHz | ≥ 30:1 (typ. 40:1) | 7/16, APC-7, N | f0 |
| L1007 | 0.7 GHz | 10 GHz | 10:1 ~ 100:1 | APC-7, N | f0, 2f0 |
| L1208 | 0.8 GHz | 12 GHz | 10:1 ~ 100:1 | APC-7, N | f0; 2f0 |
| L1218 | 1.8 GHz | 12 GHz | 10:1 ~ 100:1 | APC-7; N | f0; 2f0 |
| L1804 | 0.4 GHz | 18 GHz | 10:1 ~ 100:1 | APC-7, N | f0, 2f0 |
| L1807 | 0.7 GHz | 18 GHz | 10:1 ~ 100:1 | APC-7, N | f0. 2f0 |
| L1808 | 0.8 GHz | 18 GHz | 10:1 ~ 100:1 | APC-7, N | f0, 2f0 |
| L1818 | 1.8 GHz | 18 GHz | 10:1 ~ 100:1 | APC-7, N | f0, 2f0 |
| L302 | 0.2 GHz | 3 GHz | 10:1 ~ 100:1 | 7/16, APC-7, N | f0, 2f0 |
| L804 | 0.4 GHz | 8 GHz | 10:1 ~ 100:1 | 7/16, APC-7, N | f0, 2f0 |
| L808 | 0.8 GHz | 8 GHz | 10:1 ~ 100:1 | 7/16, APC-7, N | f0, 2f0 |
| M1007 | 0.7 GHz | 10 GHz | 10:1 ~ 100:1 | APC-7, N | f0, 2f0, 3f0 |
| M1204 | 0.4 GHz | 12 GHz | 10:1 ~ 100:1 | APC-7, N | f0, 2f0, 3f0 |
| M1208 | 0.8 GHz | 12 GHz | 10:1 ~ 100:1 | APC-7, N | f0, 2f0, 3f0 |
| M1218 | 1.8 GHz | 12 GHz | 10:1 ~ 100:1 | APC-7, N | f0, 2f0, 3f0 |
| M1804 | 0.4 GHz | 18 GHz | 10:1 ~ 100:1 | APC-7, N | f0, 2f0, 3f0 |
| M1807 | 0.7 GHz | 18 GHz | 10:1 ~ 100:1 | APC-7, N | f0, 2f0, 3f0 |
| M1808 | 0.8 GHz | 18 GHz | 10:1 ~ 100:1 | APC-7, N | f0, 2f0, 3f0 |
| M1818 | 1.8 GHz | 18 GHz | 10:1 ~ 100:1 | APC-7, N | f0, 2f0, 3f0 |
| M804 | 0.4 GHz | 8 GHz | 10:1 ~ 100:1 | 7/16, APC-7, N | f0, 2f0, 3f0 |
| M807 | 0.7 GHz | 8 GHz | 10:1 ~ 100:1 | 7/16, APC-7, N | f0, 2f0, 3f0 |
| M808 | 0.8 GHz | 8 GHz | 10:1 ~ 100:1 | 7/16, APC-7, N | f0, 2f0, 3f0 |
