Focus’ modular microstrip, high power and ultra low loss coaxial RF Test Fixtures are designed mainly for load pull testing of packaged transistors. All Focus test fixtures come with TRL calibration standards and support most transistor packages sized from less than 0.1″ and up to 1″.
Special designs include:
- Decade wide (Fmax:Fmin ~10:1) Klopfenstein transformers,
- Water and Air cooling and
- On substrate bias networks.
- Microstrip fixtures (PTJ-x*; Packaged Test Jig) are available with 50Ω lines or built-in λ/4 or taper (Klopfenstein) transformers, harmonic traps and DC bias networks
- Minimum Loss coaxial Test Fixtures (MLTF-x*) (insertion loss < 0.03 dB at 2 GHz) are available with 7mm, N and 7/16 connectors in frequency ranges up to 18 GHz. (US patent 6,464,513)
Both RF Test Fixture types can be fitted with water cooling for RF power up to several hundred Watts.
(*) ‘-x’ indicates the frequency range: DC-4GHz, -6GHz, -12GHz and -18GHz.
Modular RF Power Transistor Test Fixtures
| ID | wdt_ID | Model | Frequency | Connector |
|---|---|---|---|---|
| 1 | 1 | PTJ-S | DC - 4 GHz, TRL Calibration standards | N, 7mm, SMA, 2.9mm, 3.5mm |
| 2 | 2 | PTJ-C | DC - 6 GHz, TRL Calibration standards | N, 7mm, SMA, 2.9mm, 3.5mm |
| 3 | 3 | PTJ-X | DC - 12 GHz, TRL Calibration standards | N, 7mm, SMA, 2.9mm, 3.5mm |
| 4 | 4 | PTJ-Ku | DC - 18 GHz, TRL Calibration standards | N, 7mm, SMA, 2.9mm, 3.5mm |
| 5 | 5 | PTJ-Ka | DC - 26 GHz, TRL Calibration standards | 2.9mm, 3.5mm |
| 6 | 6 | PTJ-Klop | Klopfenstein, custom design | N, 7mm, SMA, 2.9mm, 3.5mm |
Modular RF Power Transistor Test Fixtures
| ID | wdt_ID | Model | Frequency | Connector |
|---|---|---|---|---|
| 1 | 1 | PTJ-S | DC - 4 GHz, TRL Calibration standards | N, 7mm, SMA, 2.9mm, 3.5mm |
| 2 | 2 | PTJ-C | DC - 6 GHz, TRL Calibration standards | N, 7mm, SMA, 2.9mm, 3.5mm |
| 3 | 3 | PTJ-X | DC - 12 GHz, TRL Calibration standards | N, 7mm, SMA, 2.9mm, 3.5mm |
| 4 | 4 | PTJ-Ku | DC - 18 GHz, TRL Calibration standards | N, 7mm, SMA, 2.9mm, 3.5mm |
| 5 | 5 | PTJ-Ka | DC - 26 GHz, TRL Calibration standards | 2.9mm, 3.5mm |
| 6 | 6 | PTJ-Klop | Klopfenstein, custom design | N, 7mm, SMA, 2.9mm, 3.5mm |
Add-On Options
| wdt_ID | ID | Model | Description |
|---|---|---|---|
| 1 | 1 | TRINW | Transistor Insert with water cooling option |
| 2 | 2 | WCP | Water cooling pump for water cooling option |
| 3 | 3 | XDEL | Extra delay line, standard |
| 4 | 4 | XTRIN | Extra Transistor Insert, Standard |
| 5 | 5 | XTRFS | Extra Transistor Substrate, Custom |
| 6 | 6 | TRFS-CUS | Extra Transformer Substrate, Custom |
| 7 | 7 | XTRCLP | Extra Transistor Clamp, flush mount |
Add-On Options
| wdt_ID | ID | Model | Description |
|---|---|---|---|
| 1 | 1 | TRINW | Transistor Insert with water cooling option |
| 2 | 2 | WCP | Water cooling pump for water cooling option |
| 3 | 3 | XDEL | Extra delay line, standard |
| 4 | 4 | XTRIN | Extra Transistor Insert, Standard |
| 5 | 5 | XTRFS | Extra Transistor Substrate, Custom |
| 6 | 6 | TRFS-CUS | Extra Transformer Substrate, Custom |
| 7 | 7 | XTRCLP | Extra Transistor Clamp, flush mount |
Minimum Loss Test Fixture (MLTF) Coaxial
| wdt_ID | ID | Model | Frequency | Connector |
|---|---|---|---|---|
| 1 | 1 | MLTF-C | DC - 4 GHz | 7mm, N, 7/16 |
| 2 | 2 | MLTF-X | DC - 12 GHz | 7mm, N |
| 3 | 3 | MLTF-Ku | DC - 18 GHz | 7mm, 3.5mm |
| 4 | 4 | MLTF-Ka | DC - 26.5 GHz | 3.5mm |
Minimum Loss Test Fixture (MLTF) Coaxial
| wdt_ID | ID | Model | Frequency | Connector |
|---|---|---|---|---|
| 1 | 1 | MLTF-C | DC - 4 GHz | 7mm, N, 7/16 |
| 2 | 2 | MLTF-X | DC - 12 GHz | 7mm, N |
| 3 | 3 | MLTF-Ku | DC - 18 GHz | 7mm, 3.5mm |
| 4 | 4 | MLTF-Ka | DC - 26.5 GHz | 3.5mm |
Minimum Loss Test Fixture (MLTF) Coaxial
| wdt_ID | ID | Model | Frequency | Connector |
|---|---|---|---|---|
| 1 | 1 | MLTF-C | DC - 4 GHz | 7mm, N, 7/16 |
| 2 | 2 | MLTF-X | DC - 12 GHz | 7mm, N |
| 3 | 3 | MLTF-Ku | DC - 18 GHz | 7mm, 3.5mm |
| 4 | 4 | MLTF-Ka | DC - 26.5 GHz | 3.5mm |
