CST – Computer Simulation Technology

J-pole Antenna

Image of the J-pole antenna Image of the J-pole antenna

The J-pole antenna is a wire antenna with a form that resembles the letter "J" and performance similar to that of a wire dipole antenna. In its most basic form it is defined as a half wavelength antenna with a quarter wavelength matching stub. Similar to a dipole, the J-pole has an omnidirectional radiation pattern. It is sometimes referred to as an end-fed Zepp; a reference to the antennas used on the Zeppelin dirigibles in the 1930's.

The J pole has a fairly narrow impedance bandwidth, ranging from 3% to 5%. The radiation pattern is similar to that of a dipole, with slightly more gain.

Typical total 3D radiation pattern at the center frequency Typical total 3D radiation pattern at the center frequency Typical S11 performance of the antenna Typical S11 performance of the antenna

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