Antenna Analyzer Schematic

Antenna analyzer schematic. A variable oscillator frequency counter frequency multiplier 50 ohm rf bridge twelve bit a d converter and a microcontroller. One leg is a circuit in the analyzer with calibrated components whose combined impedance can be read on a scale. 20 db 150 watt attenuator. It combines a microcontroller either an arduino or a pic microcontroller with an inexpensive direct digital synthesis dds module using an ad9850 chip and a bridge circuit to measure the swr.

Not only that this antenna analyzer has a smooth reduction drive tuning and ni mh ni cd charger circuit. There are many types of antenna analysers such as anritsu vna master rigexpert minivna and others. The easiest way to check for these errors is to put the analyzer in frequency counter mode and carefully observe the swr meter. Build your own antenna analyser for under 50 beric dunn k6bez.

The second described elsewhere on this website is a fully fledged digital meter complete with lcd display. The other leg is the unknown either an antenna or a reactive component. The mfj 269c is a compact battery powered rf impedance analyzer. This guide shows how to construct and use a diy hf antenna analyzer using arduino for less than 50.

Please keep my footprint on it. Here is a simple easy and cheap way to make fairly high power rf attenuators. They starts from 500 up to thousands of dollars and they are also hard to hack. If the swr meter deflects at all in the frequency counter mode the analyzer is being biased from the antenna port by something.

I do not suggest using a low pass or high pass. And joy of building an own antenna analyzer. Mfj 259b antenna analyzers sch mfj 752c receiver signal enhancerii vetel minoseg javito instr sm mfj 812 and 810 vhf swr wattmeters mfj 962c versatuner 3 mfj enterprises mfj 206 1 8 30mhz antenna current probe rh antenna aram mero sch. K6bez antenna analyzer this is the grand daddy of diy antenna analyzers.

A bridge circuit has two legs which are frequency dependent complex valued impedances. An antenna analyzer is a device which measures the impedance of an antenna. The circuit diagram pcb art work and firmware hex for this project are attached in this article could be freely utilized for personal or education purposes. Science behind as i had told before it works using vector analysis method which evaluates three different.

The first described in this article is an all analog device with not a microprocessor in sight.