Learn How to Calculate Jpole Antenna - Tutorial

Learn How to Calculate Jpole Antenna - Definition, Formula and Example

Definition:

Jpole antenna is nothing but an omni-directional antenna having a configuration similar to 'J' and it consists of a half-wave antenna end-fed by a parallel-wire quarter-wave segment.

J-pole Antenna:

Jpole Antenna Calculator

In the above figure A, B, C, D denotes the feet values of the antenna.

Example:

If the current frequency is 100 MHz, then find the dimensions in various stages for the above given diagram.

Given,

Frequency (f)= 100 MHz Feet (A) = 705 Feet (B) = 234 Feet (C) = 23 Feet (D) = 22

To Find,

Long section dimension (A) Short section dimension (B) Feed point dimension (C) Spacing dimension (D)

Solution:

Let us calculate various dimensions for the given frequency.

Long section dimension (A) :
Long section dimension = 705 / frequency
= 705 / 100
= 7.05 feet
Short section dimension (B) :
Short section dimension = 234 / frequency
= 234 / 100
= 2.34 feet
Feed point dimension (C) :
Feed point dimension = 23 / frequency
= 23 / 100
= 0.23 feet
Spacing dimension (D) :
Spacing dimension = 22 / frequency
= 22 / 100
= 0.22 feet

Related Calculator:

Learn how to calculate Jpole Antenna dimensions in this tutorial, given with the definition, formula and example.


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