hello
im doing an HNC in electronics at college and I have to do a project as one of the units. the project I have chosen is an antenna analyser built using arduino, AD9850 DDS module, 16x2 LCD, wheat stone bridge and op amp circuit. there is a rotary encoder with push button that will be used to choose frequencies. I hope to be able to choose a starting frequency, press a button and the analyser will sweep through 1MHz and record the swr below 2:1. this recorded swr will be shown as the bandwidth of the antenna.
I have to write a report on what I intend to do and as part of the report I have to write a technical statement that shows a list of measurables. things that the circuit should do that I can prove has been accomplished with the final circuit. that is how I understand it. so I have written my technical spec as I understand it and would really really really appreciate the input from people who know what they are doing.
so this is my tech spec.....so far
Technical specification
The meter will aim to measure complex impedance and SWR and display the results on a 16x2 LCD display
DDS module will generate a frequency chosen by the user
The control device is a single rotary encoder with push button
The frequency will increment in steps chosen using the rotary encoder
The frequency will increase in 100Hz, 1kHz, 10kHz, 100kHz, 1Mhz
The DDS module will output a 2v pk-pk signal
The chosen frequency will have a start point and sweep through 1MHz
Any value below 2:1 SWR will be recorded and shown as the bandwidth of the unknown impedance
A wheat stone bridge will measure the unknown impedance
An Arduino mini pro will control the DDS and the display and perform math operations on measured voltages
The unit will be powered by a 9volt PP3 battery
any help would be great
thanks
simon
im doing an HNC in electronics at college and I have to do a project as one of the units. the project I have chosen is an antenna analyser built using arduino, AD9850 DDS module, 16x2 LCD, wheat stone bridge and op amp circuit. there is a rotary encoder with push button that will be used to choose frequencies. I hope to be able to choose a starting frequency, press a button and the analyser will sweep through 1MHz and record the swr below 2:1. this recorded swr will be shown as the bandwidth of the antenna.
I have to write a report on what I intend to do and as part of the report I have to write a technical statement that shows a list of measurables. things that the circuit should do that I can prove has been accomplished with the final circuit. that is how I understand it. so I have written my technical spec as I understand it and would really really really appreciate the input from people who know what they are doing.
so this is my tech spec.....so far
Technical specification
The meter will aim to measure complex impedance and SWR and display the results on a 16x2 LCD display
DDS module will generate a frequency chosen by the user
The control device is a single rotary encoder with push button
The frequency will increment in steps chosen using the rotary encoder
The frequency will increase in 100Hz, 1kHz, 10kHz, 100kHz, 1Mhz
The DDS module will output a 2v pk-pk signal
The chosen frequency will have a start point and sweep through 1MHz
Any value below 2:1 SWR will be recorded and shown as the bandwidth of the unknown impedance
A wheat stone bridge will measure the unknown impedance
An Arduino mini pro will control the DDS and the display and perform math operations on measured voltages
The unit will be powered by a 9volt PP3 battery
any help would be great
thanks
simon
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