J Pole Antenna Calculator

J Pole Antenna Calculator calculator can be used to calculate the dimensions of a J Pole antenna based on the operating frequency for optimal performance.

Input Parameters

Calculation Results

Calculation Results

Length of J Pole (λ/4): -- meters

Length of Tuning Stub (λ/8): -- meters

Width of J Pole: -- mm

Width of Tuning Stub: -- mm

Calculation Formula

Wavelength (λ) = 300 / Frequency (MHz)
J Pole Length = λ/4
Tuning Stub Length = λ/8
Width = 1.5 mm per 100 MHz up to 1 GHz
Stub Width = 1.2 mm per 100 MHz up to 1 GHz

J Pole Antenna Calculator Usage Guide

Learn how to use the J Pole Antenna Calculator and understand its working principles

How to Use This Calculator

  1. Enter the operating frequency of your J Pole antenna in MHz (e.g., 433, 915, 2400).
  2. Click the "Calculate" button to compute the antenna dimensions.
  3. The calculator will display the required length of the J Pole, the tuning stub length, and their respective widths.
  4. Use these dimensions to construct your J Pole antenna for optimal performance at the specified frequency.

Working Principle

A J Pole antenna is a type of resonant antenna that consists of a main radiating element (J Pole) and a shorting stub. The J Pole works by creating a quarter-wavelength monopole above a ground plane, while the stub helps to tune the antenna to the operating frequency by providing a capacitive effect.

The dimensions of the J Pole antenna are directly related to the operating frequency. As the frequency increases, the wavelength decreases, resulting in a shorter antenna. The width of the antenna elements is also important for proper impedance matching and radiation efficiency.

Applications

J Pole antennas are commonly used in various applications including:

  • Wireless communication systems
  • Radio frequency identification (RFID)
  • Bluetooth devices
  • LoRa and other low-power wireless networks

Note: The calculator provides simplified calculations for educational purposes. For precise antenna design, refer to advanced antenna design software or consult with an antenna engineer.