The calibration kit ordered for a vector network analyzer (VNA) should be chosen based on two main criteria, in order to select the correct model:
If you only want to test SMA devices, but your VNA has N connectors, then you need an SMA calibration kit and do not need an N calibration kit. Many people make the mistake of thinking they need an N calibration kit if their VNA has N connectors. If you wish to test waveguide components, you need a waveguide calibration kit. Many of the older VNAs available, in particular the very popular HP 8753 series, have APC7 connectors on them. Despite being a precision connector, it use is relatively rare in 2021, so most people do not need an APC7 calibration kit, even if their VNA has APC7 connectors. The table below should help clarify this.
SMA, 3.5 mm and 2.92 mm(K) connectors are mechanically compatible. An SMA kit can calibrate SMA, 3.5 mm or 2.92 mm devices, although the upper frequency limit of 3.5 mm and 2.92 mm extends beyond that of SMA connectors. Generally SMA connectors are considered rated up to 18 GHz, 3.5 mm up to 26.5 GHz and 2.92 mm (K) up to 40 GHz
|Connector on DUT||Connector on VNA||Suitable calibration kit|
|SMA||2.92 mm or K||SMA|
|N||2.92 mm / K||N|
|3.5 mm||3.5 mm||SMA|
|3.5 mm||2.92 mm or K||SMA|
|3.5 mm||2.4 mm||SMA|
|WR90 Waveguide||APC7||WR90 Waveguide|
|WR90 Waveguide||N||WR90 Waveguide|
|WR90 Waveguide||3.5 mm||WR90 Waveguide|
|WR90 Waveguide||SMA||WR90 Waveguide|
|WR90 Waveguide||2.92 mm / K||WR90 Waveguide|
|WR90 Waveguide||2.4 mm||WR90 Waveguide|
Kirkby Microwave sell calibration kits for SMA (our most popular), N and waveguide calibration kits. Waveguide kits tend to be built to order, so please contact us about those.
Kirkby Microwave sell the following ranges of kits as standard.
Kirkby Microwave Ltd is registered in England and Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT.