VNAX

*The dynamic range specifications assume that low phase sources are used, like those used in the modern Keysight PNA / PNA-X analyzers
with DDS synthesizers. While compatible, other VNAs may reduce dynamic range.

**WM164 (WR0.65) performance is specified for a TxRx-Rx configuration. Performance of a TxRx-TxRx configuration is estimated to have a 
~15 dB degradation of dynamic range and may additionally require the use of a mmWave controller. 

^†Test Port Input Powers exceeding the peak Test Port Power of the TxRx or TxRef module will compress the module.

General Notes: 

Extension modules are compatible with all modern VNAs. Please consult with VDI to discuss VNA and module configurations that will yield the best performance for your application.

 
Technical Notes:

1. Test Port Power is typical, reduced power is possible at band edges. 

2. Stability is specified for 1 hour after system warm-up, in stable environment with ideal cables.

3. Specifications assume a through measurement with two TxRx heads.

4. Specifications are measured on a Keysight PNA/PNAX with front panel connection at 25°C typical.

5. The dynamic range (RBW 10 Hz) is measured by first connecting two TxRx heads together and normalizing the un-calibrated S21 & S12. The heads are then disconnected and terminated with a waveguide short. The rms of the measured S21 & S12 give the system dynamic range.

6. Typical Module Dimensions exclude testport (2" standard testport for all modules except WM250 (WR1.0), where a 1" testport is used)

^‡Where noted, Extended Frequency Coverage applies; module performance within the standard band conforms to standard specifications while performance in the extended regions can be degraded as follows:

-The minimum and typical dynamic range is degraded by 10dB or less, compared to the specification for the standard band. 

-The test port power typical across the extended band is degraded by 5 dB or less compared to the specification for the standard band. 

Contact [email protected] for more information.

CUSTOM VNAX

VDI continues to improve its VNAX product line by focusing on reaching higher frequencies and powers.

235 GHz High Test Port Power VNAX

This custom system achieves > 10dBm test port power across ~ 228-242 GHz while maintaining similar dynamic range, stability and directivity as our standard WR4.3VNAX. VDI is able to offer narrow band/high test port power modules like the 235 GHz Custom High Test Port Power VNAX module. Dynamic Range and Test Port Power performance is shown below:

 Contact [email protected] for more information.

CAL KITS

Calibration Kits

VDI offers banded waveguide calibration kits for s-parameter calibration of our extension modules. Two different calibration techniques are offered dependent upon the frequency of operation: TRL (Through-Reflect-Line) calibrations for WR28 through WR3.4; SOLT (Short-Open-Load-Through) calibrations for WR2.8 through WR1.0. VDI also makes available both Type A (legacy) and Type B (current) versions of the calibration standards to support both QW (Quarter Wave Delay Shim) and QD (Quarter Wave Delay Short) standards. These standard versions are described here. Electronic calibration kit definitions are available for download below. 

Use the image below to identify the correct type of calibration kit needed.

 

 

Click below to download the appropriate cal kit definition file (in zipped format):
	Keysight Type A download	Keysight Type B download
	Anritsu Type A download	Anritsu Type B download
Rohde&Schwarz	R&S Type A download	R&S Type B download
	Copper Mountain Type A download	Copper Mountain Type B download

Type A Calibration Kits have been discontinued but Type A Calibration Kit Definitions may still be downloaded here.

Questions? Contact VDI at [email protected]

DUAL SOURCE

Dual Source Module Option

The Dual Source (DS) option for VDI VNAX modules adds a second source module and a directional coupler into the standard TxRx Module (see block diagram below). This enables two-tone measurements to allow users to characterize device linearity. VNAX-DS modules have slightly reduced test port power and dynamic range compared to standard VNAX modules. VNAX-DS modules conform to all other standard
S-parameter performance specifications. Specifications listed below are specific for the DS option. For setup instructions or other information about our VNAX-DS Modules, please Contact VDI. For more information on VDI VNAX Modules, please refer to VDI-707.1 (VNAX Product Manual) located under the Resources tab.  

^‡Where noted, Extended Frequency Coverage applies; module performance within the standard band conforms
to standard specifications while performance in the extended regions can be degraded as follows:

-The minimum and typical dynamic range is degraded by 10dB or less, compared to the specification for the
standard band.

-The test port power typical across the extended band is degraded by 5dB or less compared to the specification
for the standard band.

TRIPLEXER

Triplexer Option

For Rx modules, Virginia Diodes offers a triplexer option that allows the user to combine DC, LO, and IF signals onto a single cable. The triplexer can be mounted on the top of the Rx module. To mount the triplexer assembly to the Rx module, the Rx module must be configured with appropriate mounting holes, as shown below. 

See 2D drawing of Rx modules (with ~4.75" x 3.0" x 1.5" enclosures) here.  

NOTE: A +15V Power Supply may be needed when using long cables (up to ~5m) with the Triplexers. A +15V Power Supply may be shipped for use with certain VNAX modules, when purchased with a Triplexer.

Contact VDI for additional information and details.

DUAL RX

Dual RX Option

For VDI Mini Rx Modules, VDI offers a Dual Rx configuration. The Dual Rx Module integrates two Rx chains in the same enclosure, with 1.375” center-to-center spacing between the test ports. Each Rx chain meets the standard specifications for Rx modules.  

  Contact VDI for additional information and details.

RESOURCES