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Project by:
I2TZK,
K7SFN , VU2FD
END
OF PROJECT:
Please Consider Revised version
AAZ-0217
AAZ-0912A: USB/PC Version
AAZ-0912 was a very popular
antenna analyzer kit among Radio Amateurs. Hence, we decided to
continue with this kit which is USB Only Version. If you intend to
use Analyzer with Graphic CPU, please consider AAZ-0713A.
Measuring antenna impedance or line losses is
of a great interest to Radio Amateurs. That too when it comes to
measure an antenna performance without having a transmitter, it
brings special attention of homebrewers.
This project uses AD9850/51 as a Signal Generator
and AD8307 as a detector and works with a resistive return-loss
bridge.
Look simple but it is made so by our friend Tony
/ I2TZK who spent a lots of time in making Firmware and PC
software for this project.
AAZ-0912A is
designed to accommodate AD9850, SMT
125MHZ OSC and SMT SO8 AD8307. This mod made possible prepare full
kits and assembled at low prices.
A special PC software is developed by Tony / I2TZK
which, when installed on your PC, gives you a graphical presentation of
how good your antenna is!!
To further cheer-up homebrewers, we have made a
small carrier board for SSOP28 package of AD9850/51. AAZ-0912 kits
are supplied with DDS chip pre-soldered on carrier board to make assembly of
this kit without much pain.
Purpose of this project is to
encourage radio amateurs to build their own Antenna Analyzer at a low
cost.
I2TZK
PC Software (WinXP/WIN7) & PIC Firmware
V5.00 for AAZ-0912A has achieved
following design task:
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Simple
Single Micro Controller with built-in A/D
converter (PIC18F2550/2553) |
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DDS
Based signal Generator. Act as a signal source too |
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Main
features are: |
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USB
Powered.
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Full
HF Range: to 35MHZ (Goes to 50MHZ) |
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Stable
Reference voltage using LM385-2.5V. |
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BNC
Connector for antenna connection |
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Calculates
SWR and other parameters of antenna |
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Free
PC Program by Tony
/ I2TZK |
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Firmware
accepts PIC18F2550 or 2553 and DDS AD9851 or AD9850
(V3.00). |
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AD8307
as a Log Amplifier. |
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AD9850/51
Carrier board supplied |
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