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Antenna Analyzer by Beric Dunn, K6BEZ

RESOURCES


Presentation at Pacificon 2013


Project Overview Document


Analyzer PC program (run time)


Analyzer PC program source code


Analyzer microcontroller source
for PIC (HamStack) and Arduino

Breadboard Version  The final circuit can actually be built for under $20 Here you see the DDS module, BNC, bridge and PIC microcontroller. Arduino Version  This version shown uses a small Arduino CPU module.

Software

Control is done by serial comunications. The default Baud-rate is 57600, 8 bit, 1 stop bit, no handshake.

Syntax:

"1000000C" sets the DDS output to 1 MHz

"1000000A" sets the start frequency to 1 MHz

"30000000B" sets the stop frequency to 30 MHz

"100N" sets the number of sweep steps to 100

"S" Starts the sweep.

This will return a list of frequencies, VSWR (*1000) and detector voltages. The example shown is for a 10 point sweep between 1 MHz and 2 MHz. The first line shows 1000000 Hz with a VSWR of 31.165, the forward detector voltage of 505 and reverse of 592.

1000000,0,31165,505,592

1100000,0,31451,503,590

1200000,0,32624,501,589

1300000,0,32157,504,592

1400000,0,31307,504,591

1500000,0,32624,501,589

1600000,0,31709,507,595

1700000,0,31564,508,596

1800000,0,32157,504,592

1900000,0,31307,504,591

2000000,0,31165,505,592

End


"?"  Returns a list of the sweep parameters:

        Start Freq:1000000        

        Stop Freq :30000000        

        Num Steps :100