With its individually spring loaded, Beryllium-Copper tips, the Model 90 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. The Model 90 Picoprobe also provides direct viewing of the probe tips for accurate positioning.
The Model 90 Picoprobe sets new standards in microwave probing performance. Benefiting from coaxial techniques, which have inherent low loss and low dispersion characteristics, the Model 90 Picoprobe achieves an insertion loss of less than 1.5 db and a return loss of greater than 15 db over its frequency range. The Model 90 has a WR-12 waveguide input and a K connector DC input.
The Model 90 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 (48.35 GHz) of WR-12 waveguide.
Without this low frequency loss most active devices will oscillate.
Micropositioners are available to hold Wiltron W 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 between the probe and the W band module may be desired to add
positioning flexibility.