For most applications, an ideal coil only has inductive reactanceĪnd no losses. The current through the coil generates a magnetic field that interacts with theĬoils itself. This mayĮxplain large differences in behavior when exciting an antenna system or otherĬircuit with full power of a transmitter!Īn electromagnetic coil is simply an inductor that is wound so as to have the shape of a coil, helix, or spiral. Saturation of transformers with ferrite or iron-powder material. That can be done with a VNA such as the miniVNA.Ĭaveat: the signal generator of the miniVNA (and similar analyzers) has a 0ĭBm output. The sections below provide a brief description of some basic measurements VB software by PA7N), but I have no experience with them. On my Android tablet: the nice and flexibleīlue VNA application (both via USB & Bluetooth) by.Related whatsoever to javascript) vna/J by Dietmar Krause (DL2BSA). Another option is the Java-based (which is not.In fact, six OCX files need to be DLL-registered. Upon starting the application, I got an error message about an OCX file that was missing. Early 2018, I installed miniVNA234 on a 64-bit Windows 10 PC.On my Windows PCs and laptops: the original software by IW3HEV/IW3IWZ/G3RXQ/IK3ZGB.I.e., it cannot tell an inductance from a capacitance. The manual! Also note that relatively (!) inexpensive VNAs such as the miniVNAĬannot determine the sign of the reactance part Xs of the measured Must be calibrated to the extent possible! Check (miniVNA analysis parameter display selections in the original IW3HEV-IW3IJZ software)īefore using a VNA for the first time, it Reasons, I refer to it as "the little blue box":
I got it primarily for measuring antennas and antenna systems. It is very small, and (relatively) inexpensive Vector Network Analyzer "He who measures a lot, measures a lot of crap"Ĭa. No part of this publication may be used without permission from the author. The CH0 port of the nanoVNA corresponds to the Device Under Test (DUT) port of the miniVNA, and CH1 to the Detector (DET) port of the miniVNA. They are equally applicable to, e.g, the increasingly popular nanoVNA. NOTE: the measurement techniques discussed below are not exclusively specific to the miniVNA. Measuring capacitors) January 2020 (added 10m USBĮxtension cable) 8 September 2019 (added ref. Previous updates: January 2022 (expanded ref. Latest page update: October 2022 (expanded ref. It is currently disabled in your browser! Please (re-)enable it for full functionality. My website uses JavaScript for menus etc.
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