Smith chart

Plot impedance sweeps as reflection coefficients inside the unit disc, with the constant-resistance and constant-reactance grid. For RF work. Hover, touch or step through samples with the keys to read each impedance and |Γ|; hovering a legend row picks out its trace.

Input impedance, 1 to 3 GHz
Trace	Sample	Impedance
Antenna	1 GHz	0.35 − j0.60
Antenna		0.60 − j0.30
Antenna		1.00 + j0.10
Antenna		1.80 + j0.70
Antenna	3 GHz	3.00 + j1.50
Filter	1 GHz	0.50 + j1.40
Filter		0.90 + j0.80
Filter		1.30 − j0.20
Filter	3 GHz	0.70 − j1.10

Usage

use hydroxy_leptos::smith_chart::*;
use leptos::prelude::*;

#[component]
pub fn Demo() -> impl IntoView {
    // Normalised impedance (z / Z0) swept across frequency. The first and last labels name the ends of each trace.
    let samples = vec![
        Sample::new("Antenna", 0.35, -0.60).labelled("1 GHz"),
        Sample::new("Antenna", 0.60, -0.30),
        Sample::new("Antenna", 1.00, 0.10),
        Sample::new("Antenna", 1.80, 0.70),
        Sample::new("Antenna", 3.00, 1.50).labelled("3 GHz"),
        Sample::new("Filter", 0.50, 1.40).labelled("1 GHz"),
        Sample::new("Filter", 0.90, 0.80),
        Sample::new("Filter", 1.30, -0.20),
        Sample::new("Filter", 0.70, -1.10).labelled("3 GHz"),
    ];

    view! {
        <SmithChart samples=samples label="Input impedance, 1 to 3 GHz" />
    }
}

use dioxus::prelude::*;
use hydroxy_dioxus::smith_chart::{Sample, SmithChart};

#[component]
pub fn SmithChartDemo() -> Element {
    let samples = vec![
        Sample::new("Antenna", 0.35, -0.60).labelled("1 GHz"),
        Sample::new("Antenna", 0.60, -0.30),
        Sample::new("Antenna", 1.00, 0.10),
        Sample::new("Antenna", 1.80, 0.70),
        Sample::new("Antenna", 3.00, 1.50).labelled("3 GHz"),
        Sample::new("Filter", 0.50, 1.40).labelled("1 GHz"),
        Sample::new("Filter", 0.90, 0.80),
        Sample::new("Filter", 1.30, -0.20),
        Sample::new("Filter", 0.70, -1.10).labelled("3 GHz"),
    ];

    rsx! {
        SmithChart { samples, label: "Input impedance, 1 to 3 GHz" }
    }
}

Anatomy

Component	data-part	Renders
`SmithChart`	root	figure; `data-highlight` while a trace is picked out
	plot	Focusable group; reads the sample nearest the pointer
	boundary	The unit circle: zero resistance
	grid	Constant-resistance circles and constant-reactance arcs
	series	One group per trace; `data-active` when picked out, the others quiet
	point	One per sample; the sweep ends are filled; `data-active` when read
	end-label	Labels at the start and end of a sweep
	tooltip	Trace, sample label, impedance and \|Γ\|
	legend	One row per trace when there are two or more; hover picks the trace out
	sr-live	Announces the sample being read
	sr-table	Every sample, for screen readers and CSV export

Keyboard

Key	Does
`ArrowRight / ArrowLeft`	Next or previous sample along the trace
`ArrowDown / ArrowUp`	Same position on the next or previous trace
`Home / End`	First or last sample of the trace
`Escape`	Clear the tooltip

Props

Prop	Type	Notes
`samples`	Vec<Sample>	Required. Sample::new(trace, real, imaginary).labelled(..); same trace name is one sweep
`label`	String	Required. What the chart shows; the accessible name
`z0`	f64	Reference impedance. 1 for normalised samples (default); 50 for raw ohms
`format`	Fn(f64) -> String	Formats resistance and reactance. Default: two decimal places

Events

Prop	Type	Notes
`on_hover`	Callback<Option<Datum>>	The mark under the pointer or keyboard focus changes, or is left. Fires only on a change
`on_select`	Callback<Datum>	Click, tap or Enter on a mark