# 2.4GHz Inverted-F PCB Antenna (IFA) Footprint

## Overview

This KiCad footprint provides a 2.4GHz Inverted-F antenna designed for 2-layer 1.6mm PCB (JLCPCB stackup). The antenna is tuned in the 2.4GHz ISM band.

## Specifications

- **Type:** Inverted-F Antenna (IFA)
- **Frequency:** 2.4GHz ISM band
- **PCB:** 2-layer, 1.6mm thickness
- **Impedance:** 50Ω matched

## Design

### Footprint

![Antenna Footprint](pics/footprint_v2.png)

### Sketch

![Antenna Sketch](pics/sketch_v2.png)

## Tuning Parameters

### Z-Parameters

![Z-Parameters](pics/z_param_2d_v2.png)

- Center frequency: 2.4460 GHz
- Real impedance: 50.0875 Ω
- Imaginary impedance: 0.0621 Ω

### S-Parameters

![S-Parameters](pics/s_param_2d_v2.png)

- Center frequency (2.4460 GHz): -59.3942 dB
- 2.4 GHz: -22.4248 dB
- 2.4875 GHz: -23.71 dB
- 2.2480 GHz: -9.7640 dB
- 2.6680 GHz: -10.0289 dB
- Bandwidth (S11 < -10dB): 0.4200 GHz

### Smith Chart Parameters

![Smith Chart](pics/smith_v2.png)

- Frequency: 2.446 GHz
- Angle: 35.3197°
- Magnitude: 0.0011
- Normalized impedance: 1.0018 + 0.0012i