Results
| Element | Length (m) | Spacing from Previous (m) |
|---|
Boom Length: N/A m
Estimated Gain: N/A dBi
A log periodic antenna calculator helps you build an antenna that works for many radio frequencies at once. It looks like a row of rods that get smaller, like a ladder that shrinks. It’s great for things like TV, ham radios, or Wi-Fi because it can catch lots of signals.
With this calculator, you can enter the range of frequencies you want to use, like picking multiple radio stations. It will tell you how long each rod should be and how to arrange them. You don’t need to do hard math because the calculator does it for you. It’s like getting a plan to build your antenna the right way!
This tool is perfect for anyone who wants an antenna for different signals. For example, if you’re setting up a TV antenna to get many channels, this calculator will help you make a log periodic antenna that works great. It will also show you how to set it up to get clear signals, like tuning a radio to avoid static.
You can use this calculator on your phone or computer, so it’s always ready. It’s made for beginners, so you don’t need to know much about antennas. Whether you’re a student doing a project or a hobbyist building radios, this tool will make it fun and simple.
A Log Periodic Antenna Calculator is a specialized software tool, often available online or as an application, designed to compute the geometric and electrical parameters required for building or simulating a log-periodic antenna (also known as a log-periodic dipole array or LPDA). This type of antenna is a directional, broadband antenna that maintains consistent performance across a wide range of frequencies, making it popular for applications like TV reception, amateur radio, scanning, and RF engineering. The calculator simplifies the design process by using input parameters such as the desired frequency range, boom length, and design constants to output element lengths, spacings, and other dimensions.
Key Features and Purpose
- Design Basis: LPDA designs follow logarithmic scaling principles, where elements (dipoles) are arranged in a way that their sizes and positions decrease progressively toward the “active” region. The calculator automates equations derived from antenna theory, such as those involving the scaling factor (τ, typically 0.8–0.95) and the apex angle (α), to ensure impedance matching and wideband operation.
- Typical Inputs:
- Frequency range (e.g., lowest and highest frequencies in MHz).
- Number of elements or boom length.
- Design constants (e.g., τ for element scaling, σ for spacing).
- Typical Outputs:
- Lengths of individual dipole elements (e.g., Lx for element x).
- Distances between elements (e.g., dp,q).
- Feed point impedances and other electrical characteristics.
- Applications: Useful for hobbyists, engineers, and technicians to prototype antennas without trial-and-error. For example, it can generate blueprints for a 13-element LPDA for HF/VHF bands.