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.
In the above figure A, B, C, D denotes the feet values of the antenna.
If the current frequency is 100 MHz, then find the dimensions in various stages for the above given diagram.
Frequency (f)= 100 MHz Feet (A) = 705 Feet (B) = 234 Feet (C) = 23 Feet (D) = 22
Long section dimension (A) Short section dimension (B) Feed point dimension (C) Spacing dimension (D)
Let us calculate various dimensions for the given frequency.
| Long section dimension | = | 705 / frequency |
| = | 705 / 100 | |
| = | 7.05 feet |
| Short section dimension | = | 234 / frequency |
| = | 234 / 100 | |
| = | 2.34 feet |
| Feed point dimension | = | 23 / frequency |
| = | 23 / 100 | |
| = | 0.23 feet |
| Spacing dimension | = | 22 / frequency |
| = | 22 / 100 | |
| = | 0.22 feet |
Learn how to calculate Jpole Antenna dimensions in this tutorial, given with the definition, formula and example.
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