Coaxial Probes 
The IDI coax probe. Your most complete source for
selection and speed.
If you test at high frequencies or need an RF interconnection, IDI is uniquely qualified to address all your requirements with the industry’s most extensive line-up of high reliability coaxial probes. IDI Coax Probes provide a low noise, controlled impedance signal path with reliable and easy connect/ disconnect operations.
Our leadership in coaxial design originates from our original, patented
IDI Coax Probe providing electrical performance up to 3 GHz (with shielding
plunger) and 500 MHz (without shielding plunger).
Coax probes are us. 
We quickly became the primary source for coaxial designs. As we worked with literally hundreds of test engineers to develop new solutions, our design
options grew exponentially. Simply, for you this means there should already
be a probe in our line that will match your application. This catalog offers
11 off-the-shelf coaxial probes, with 3 new designs introduced with this
catalog. Our special Coax Catalog has over 50 additional, build-to-order
designs. If your application requires a custom designed probe, we’re the
people who can design and build it.
If your solution calls for IDI Coax Probes to be incorporated into an interconnect
system, our sister company Synergetix® is ready to assist in designing and
building a custom interconnect incorporating our probes.
- Controlled impedance or high performance through very short signal
paths
- Ring, quadrant or rectangular array footprint
- Customizable power, ground and signal paths, including capabilities
for very low resistance or high current contacts
- Advanced mechanical docking and interconnection systems
IDI coax probe options.
Below are just some of the coax probe options available at IDI. Your IDI
field tech specialist or customer service representative will help you select
the optimum probe for your application.
- 50 Ohm impedance. Additional impedance of 75 Ohm or other impedance
designs are available on a build-to-order basis. Consult IDI for more
information.
- Bandwidths of 3 GHz for coax probes with shielding plungers and 500
MHz for non-shielded probe designs. Bandwidths to 10 GHz are available
in custom designs; consult IDI for additional information.
- Double ended (compliant on both ends) or single ended (compliant
on one end).
- Single ended coax probes have the option of pre-attached cable and a standard SMA or SMB connector.
- Other single ended coax probes have a built-in SMB connector designed on the opposite end, for direct pluggability.
- A unique signal plunger continuously surrounded by a ground plane
can be continued onto the DUT via a spring-loaded shielding plunger.
- Flanged contact barrel (most models).
- Most coaxial probe assemblies have signal conductors that are often
replaceable with a standard probe (consult factory for probe replacement
options).
- Smooth-faced or serrated shielding plungers.
Features that enhance fixture-ability.
Each coaxial probe is dimensionally different, thus creating a high level
of fixturing customization, although some basic concepts are universal.
We have created special coaxial probes capable of achieving high frequency
interconnection with the least amount of signal deterioration while providing
simple connect and disconnect features.
IDI Coaxial Probes with a flanged barrel can be mounted via two fixture
plates. The two fixture plates are mounted above and below the flange and
bolted together at the fixture corners for retention as seen in the figure
above.
Caution should be used in this fixturing arrangement when using a pre-attached
SMA connector or other large connector on the end of the coaxial cable.
The diameter of the SMA connector is larger in diameter than the contact
barrel of the Coaxial Probe. This makes it impossible for the Coaxial Probe
with connector to slip through the bottom fixture plate.
New Designs.
IDI introduces three new coax probes in this Seventh Edition Catalog:
1. 100999 Coax Probe 
This new probe was designed for testing a ground pad and signal pad on the
same layer. The probe has a notched, non-rotating shielding plunger to allow
a trace to be run to the point where the center pin of the coax will make
contact.
2. 100910 Coax Probe
This probe offers a single ended coax with shielding plunger that has a
built in SMB connector. This is identical to the 100559-000 probe, already
a standard in the IDI catalog, with the option of an outer flange on the
barrel to capture the probe easier.
3. 100563 Coax Probe
This is a new coax with a flanged shielding plunger and built-in SMB connector.
It is designed to test a female SMA connector. |
