High Performance Microwave ProbesModel 50

Features urable 33 GHz to 50 GHz Insertion loss 1.0 db max Return loss 15 db max Individually spring loaded contacts Measurement repeatability -55 db Bias T option available Patented coaxial design

FIGURE 1

With its individually spring loaded, Beryllium-Copper tips, the Model 50 Picoprobe? provides reliable contacts, even when probing non-planar structures. This reliable low resistance contact is one of the keys to providing highly repeatable measurements (-55 db) at V band frequencies. The Model 50 Picoprobe? also provides direct viewing of the probe tips for accurate positioning.
Any pitch (tip spacing) from 50 microns and up may be specified. The probe can be configured with Ground-Signal-Ground (G,S,G), Ground-Signal (G,S), or Signal-Ground (S,G) tip footprints. We recommend smaller pitches with a G,S,G footprint for best performance.

Picoprobe® Model 50 Data
Typical uncalibrated performance of a Model 50-GSG-100-BT while touching a 50 ohm load on our CS-5 calibration substrate
Typical insertion loss of a Model 50-GSG-100-BT
The Model 50 Picoprobe® bias T provides a direct low resistance DC path for supplying up to 1.5 A to a device under test. The bias T also has special circuits which add loss at frequencies below the cut off frequency (26.34 GHz) of WR-22 waveguide. This data was taken by launching a, 40 MHz to 50 GHz, signal from the tips of a calibrated Model 67A into the tips of a Model 50-GSG-150-BT. Without this low frequency loss, most active devices will oscillate.

FIGURE 2

Micropositioners are available to hold Wiltron V band modules so that the module and the probe are micropositioned as a unit. In this way, total ease of positioning can be achieved with minimum insertion loss. The probes also have a 3 hole mounting adaptor which will fit standard microwave probe stations. In this case, a longer section of waveguide may be desired to add positioning flexibility.

FIGURE 3

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