Power net portal is a special schematic object used to define a power or ground net. Power ports allow you to conveniently indicate a power net at any location in the design. Power nets of the same designator automatically connect throughout your design #portal #power
A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
Certainly! Designing a WiFi antenna can be a bit complex, but I'll help you get started. Here, I will outline steps to create a simple PCB trace antenna for a 2.4GHz WiFi network. A popular choice is the Inverted-F Antenna (IFA), which is relatively simple to design and can be directly integrated into your PCB.
Antenna Dimensions Calculation:
The length of the PCB trace for a 2.4GHz frequency can be roughly calculated using the formula for the resonant length:
L=4×f×εeffc
Where:
$c$ is the speed of light ($\approx 3 \times 10^8$ m/s)
$f$ is the resonant frequency (2.4 GHz)
$\varepsilon_{\text{eff}} \approx \frac{\varepsilon_r + 1}{2}$ is the effective dielectric constant.
Plugging in the values:
εeff≈24.4+1=2.7L≈4×2.4×109×2.73×108≈0.031 meters≈31 mm
Basic Layout:
The antenna consists of a trace that is about 31 mm long.
You'll also need a ground plane, a matching network (usually a capacitor and an inductor), and a feeder line to connect to the RF pin.
Schematic and PCB Layout in FluxComponents and Pins
Connect the antenna trace to a GPIO pin of the MCU capable of RF output, e.g., TX GPIO1.
You need a matching network based on capacitor (C1) and inductor (L1).
Markdown
Connect C1:1 to TX GPIO1:1, and L1:1 to C1:2.
Connect L1:2 to the antenna trace.
Connect the antenna trace to GND at the other end.
Implementation in Flux
Step 1: Create the Inverted-F Antenna trace with a width of about 1-2 mm and length of 31 mm on the top layer.
Step 2: Place the matching network (capacitor and inductor) close to the RF GPIO pin.
Step 3: Connect the end of the antenna trace to the designated ground plane on your PCB layout.
Step 4: Ensure the appropriate connection back to the NodeMCU.
Do you have specific requirements for the antenna design or additional components you plan to integrate?
5mo
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Passive Components
Resistor Power Rating
Beta
Checks that the power traveling across a given resistor is under its rating with 50% headroom.