SMALL SPHERICAL Near-field System
Example of one of our small spherical near-field systems using an R&S VNA. Here we are transmitting through the AUT and receiving at the dual-polarized probe. Rotarty joints in the both the Phi and Azimuth rotation stages eliminate the need for RF cable service loops. Amplifiers are incorporated as needed as dictated by the RF power link budget estimate. In this system we are recording both polarizations from the dual-polarized probe on the two input ports on the VNA.
CATR RF SYSTEM
System shown uses a Keysight VNA to generate the RF signal transmitting from the AUT and being received by the CATR feed. Here too, amplifiers are used as needed to meet the specified RF system dynamic range requirement. In the system shown, RF rotary joints are included in each of the rotating axes.
Large Planar Near-Field Range
In a large planar near-field range, higher cable losses often dictate the need for a distributed frequency conversion system where remote RF modules located close to the AUT and probe are used to convert the AUT RF signal to a lower intermediate frequency (IF) prior to long cable runs between the RF modules and the VNA. In this example, we use a custom LO/IF unit and TX/RX modules to acomodate both AUT transmit and receive modes.
Keysight Distributed Frequency Conversion System
NPM supports legacy Keysight / Agilent / HP RF equipment.
Example shown illustrates a typical distributed frequency conversion system using a Keysight PNA along with their 85309A LO/IF unit and 85320A/B mixers. This configuration allows very long cables in the system without degrading system performance.
Millimeter Wave Operation
For millimeter wave operation, we can adapt existing off-the-shelf hardware with industry standard VNA's like the Keysight PNA to achieve operations at extremely high frequencies.
NPM or customer provided RF equipment
We can provide an RF system as part of a turn-key solution, or we can assist you with procurring your own RF equipment. Whether its new or existing equipment, we will ensure that it works seamsly with our measurement system and can meet your overall requirements.
