# 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: 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.