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SK & SM系列宽带射频变压器
选型：
| Vanguard P/N SK Series | Vanguard P/N SM Series | Impedance Ratio Pri:Sec | Primary Center Tap | Secondary Center Tap | Insertion Loss @50 MHz max (dB) | VSWR @50 MHz max | Bandwidth min (MHz | Schematic | |
| 0.5 dB (Ripple) | 3 dB Points | ||||||||
| SKUB55D | SMUB55D | 1:1 | No | Yes | 0.7 | 1.3 | 5.0-130 | 1.0-390 | A |
| SKUB57D | SMUB57D | 1:15 | No | Yes | 1.5 | 1.6 | 6.0-90 | 3.0-200 | A |
| SKUB510D | SMUB510D | 1:2 | No | Yes | 1.1 | 1.35 | 2.0-100 | 0.5-230 | A |
| SKUB520D | SMUB520D | 1:4 | No | Yes | 0.9 | 1.2 | 2.0-150 | 0.2-300 | A |
| SKUB580D | SMUB580D | 1:16 | No | Yes | 1.2* | 1.7* | 12-35 | 2.0-140 | A |
| SKUU55D | SMUU55D | 1:1 | No | No | 0.9 | 1.35 | 7.0-100 | 1.2-350 | B |
| SKUU57D | SMUU57D | 1:1.5 | No | No | 1.7 | 1.65 | 8.0-70 | 4.0-170 | B |
| SKUU510D | SMUU510D | 1:2 | No | No | 1.3 | 1.4 | 3.0-85 | 0.9-200 | B |
| SKUU520 | SMUU520 | 1:4 | No | No | 1.1 | 1.25 | 4.0-130 | 1.0-250 | B |
| SKUU580D | SMUU580D | 1:16 | No | No | 1.1 | 1.95 | 12-25 | 2.5-110 | B |
| SKBB55D | SMBB55D | 1:1 | Yes | Yes | 0.7 | 1.3 | 5.0-130 | 1.0-390 | C |
| SKBB57D | SMBB57D | 1:1.5 | Yes | Yes | 1.5 | 1.6 | 6.0-90 | 3.0-200 | C |
| SKBB510D | SMBB510D | 1:2 | Yes | Yes | 1.1 | 1.35 | 2.0-100 | 0.5-230 | C |
| SKBB520D | SMBB520D | 1:4 | Yes | Yes | 0.9 | 1.2 | 2.0-150 | 0.2-300 | C |
| SKBB580D | SMBB580D | 1:16 | Yes | Yes | 1.2* | 1.7* | 12-35 | 2.0-140 | C |
| SKBU55D | SMBU55D | 1:1 | Yes | No | 0.9 | 1.35 | 7.0-100 | 1.2-350 | D |
| SKBU57D | SMBU57D | 1:1.5 | Yes | No | 1.7 | 1.65 | 8.0-70 | 4.0-170 | D |
| SKBU510D | SMBU510D | 1:2 | Yes | No | 1.3 | 1.4 | 3.0-85 | 0.9-200 | D |
| SKBU520 | SMBU520 | 1:4 | Yes | No | 1.1 | 1.25 | 4.0-130 | 1.0-250 | D |
| SKBU580D | SMBU580D | 1:16 | Yes | No | 1.1 | 1.95 | 12-25 | 2.5-110 | D |
