gainlineup

Gain Lineups for RF Engineering

Example

Here is an example program to use (copy/paste) in main.rs of a new cargo new example-lineup project.

// use gainlineup::cascade::cascade_vector_return_output;
use gainlineup::cascade_vector_return_vector;
use gainlineup::Block;
use gainlineup::SignalNode;

fn main() {
    println!("\n----------------------------\n");
    run();
    println!("----------------------------\n");
}

fn run() {
    println!("Run function executed");

    // Add your code logic here
    const INPUT_POWER: f64 = 10.0; // dBm

    let input_node = SignalNode {
        name: "Input".to_string(),
        power: INPUT_POWER,
        noise_temperature: 290.0,
        cumulative_gain: 0.0, // starting/initial/input node of cascade
    };

    let cable_from_signal_generator = Block {
        name: "Cable Run from Signal Generator to DUT".to_string(),
        gain: -6.0,
        noise_figure: 6.0,
    };

    let line_amp: Block = Block {
        name: "Line Amp at X GHz".to_string(),
        gain: 22.0,
        noise_figure: 6.0,
    };

    let cable_run_to_spectrum_analyzer: Block = Block {
        name: "Cable Run from DUT to Spectrum Analyzer".to_string(),
        gain: -6.0,
        noise_figure: 6.0,
    };

    let blocks = vec![
        cable_from_signal_generator.clone(),
        line_amp.clone(),
        cable_run_to_spectrum_analyzer.clone(),
    ];

    let full_cascade: Vec<SignalNode> =
        cascade_vector_return_vector(input_node.clone(), blocks.clone());

    // println!("{:>8.2} dBm", node.power);`

    for (i, node) in full_cascade.iter().enumerate() {
        println!("");
        println!("Node {}: {}", i, node.name);

        if i == 0 {
            // the formatting `{:>8.2}` aligns positive and negative numbers on the decimal,
            // with two digits after the decimal (hundredths place)
            println!("Input Level {:>8.2} dBm", node.power);
        } else {
            let block_gain = full_cascade[i].power - full_cascade[i - 1].power;
            let input_power = node.power - block_gain;

            // the formatting `{:>8.2}` aligns positive and negative numbers on the decimal,
            // with two digits after the decimal (hundredths place)
            println!("Input Power\t{:>8.2} dBm", input_power);
            println!(
                "Block Gain:\t{:>8.2} dB    (Cumulative Gain: {:>8.2} dB)",
                block_gain, node.cumulative_gain
            );
            println!("Output Power\t{:>8.2} dBm", node.power);
        }
    }
    println!();
    println!("Final Cascade Summary:");
    println!("----------------------");
    println!("Number of Blocks: {}", full_cascade.len() - 1);
    println!("Pin:\t{:>8.2} dBm", full_cascade[0].power);

    let final_output_power = full_cascade.last().unwrap().power;
    println!("Pout:\t{:>8.2} dBm", final_output_power);
    println!(
        "Gain:\t{:>8.2} dB",
        full_cascade.last().unwrap().cumulative_gain
    );
}

The output is similar to the following:

----------------------------

Run function executed

Node 0: Input
Input Level    10.00 dBm

Node 1: Cable Run from Signal Generator to DUT Output
Input Power        10.00 dBm
Block Gain:        -6.00 dB    (Cumulative Gain:    -6.00 dB)
Output Power        4.00 dBm

Node 2: Line Amp at X GHz Output
Input Power         4.00 dBm
Block Gain:        22.00 dB    (Cumulative Gain:    16.00 dB)
Output Power       26.00 dBm

Node 3: Cable Run from DUT to Spectrum Analyzer Output
Input Power        26.00 dBm
Block Gain:        -6.00 dB    (Cumulative Gain:    10.00 dB)
Output Power       20.00 dBm

Final Cascade Summary:
----------------------
Number of Blocks: 3
Pin:       10.00 dBm
Pout:      20.00 dBm
Gain:      10.00 dB
----------------------------

behind the scenes, this calculates cumulative noise figure, by converting to noise temperature and performing the cascade functions. this could be added to the printouts, but it's not currently implemented.