OH4VNA - Optical Head for Vector Network Analyzers

System 

An OH4VNA system is composed of an OH4VNA Remote Unit, an optical head (OH), miniature directional coupler modules, a calibration kit, and a PC based software for measurement equipment control and post-processing. 

OH4VNA is optimized for measurement of S11 of electrically small antennas in:

• mobile phones
• hearing aids
• in-ear devices
• body-worn devices
• implanted devices
• hand-held devices, like barcode readers and two-way radios.

OH4VNA basic configuration contains the following elements:

• OH4VNA Remote Unit (RU)
• Optical Head (OH)
• Wideband Coupler Modules (C4OH)
• Calibration Kit (MCK4OH)
• In-Circuit Adapters (ICA4OH)

OH4VNA RU

OH4VNA Remote Unit specifications:

• OH interconnect: TDS MU8 optical interconnect
• VNA interconnect: 3.5mm RF connector
• frequency range: 10 MHz - 6 GHz
• RF dynamic range: >130 dB
• RF P1dB: >0 dBm
• RF return loss: >10 dB
• power and control: USB

OH

OH4VNA Optical Head specification:

• frequency range: 500 MHz - 6 GHz
• RF dynamic range: >100 dB
• electrical size: 6 × 6 mm (cylinder)
• mechanical size: 10 mm diameter
• antenna interconnect: via couplers (Mini-SMP)

C4OH

OH4VNA Coupler specifications:

• low frequency range: 500 MHz - 1.5 GHz
• high frequency range: 1 GHz - 6 GHz
• antenna interconnect: Mini-SMP

MCK4OH

OH4VNA Calibration Kit specifications:

• calibration standards: open/short/load
• calibration data: touchstone
• frequency range: 500 MHz - 6 GHz
• connectors: Mini-SMP

Accessories

In-Circuit PCB adapter

Mini-SMP to SMA adapter

Software

The advanced graphical-user-interface of the OH4VNA V1-2 software enables computer-aided control and measurement:

• Computer guided setup of the VNA, frequency band, calibration, measured data, and target data
• Full remote control of the VNA
• Calibration view for fast and reliable open-short-load calibration
• Measurement view with various data viewers such as log-magnitude or Smith chart
• Post-processor features to directly compare the measurement results with imported target data

API

Calibration

The OH4VNA system comes with a calibration kit compatible with mini SMP connectors

frequency range

miniature interface

easy to use

durable

500 MHz - 6 GHz

electrical size  present to antenna 6 × 6 mm (cylinder)

full software automation of measurement and post-processing

exchangeable coupler modules to replace Mini-SMP connectors

wide-band

optical link

trusted

enables the testing of wideband or multi-frequency antennas with one connection and removes the need to adapt your setup with narrow-band chokes

removes the influence of electrical cables on the S-parameter measurements

validated system in real-life applications

OH4VNA is compatible with most modern vector network analyzers - see VNA compatibility.