Reducing the Extra Noise: Patch Antennas with Ferrite Cores

The Problem:
Microstrip patch antennas are widely used in advanced wireless communication systems, however, they suffer from excess harmonic radiation. During the transmission of information between antennas (such as a phone call), noise from other parts of the system is captured. This “noise” then affects the quality of the information transmitted between the two antennas, potentially leading to system interference with potential component/ equipment degradation long term. There is a market need for novel methods of harmonic suppression that could be implemented in current generations of wireless handsets.

The Solution:
To reduce harmonic suppression, researchers at the University of Alabama have developed novel antenna designs with ferrite cores. The antenna designs have been demonstrated to significantly suppress harmonic radiation generated by radio frequency components. The designs are microstrip patch antennas with ferrite cores that are arranged on the antenna to realize peak gain at the fundamental frequency


  • Blocks extra noise/unwanted signals during the transmission of information from one antenna to another.
  • Significantly suppresses harmonic radiation and reduces back lobe.
  • Low loss of wanted frequency, high loss of unwanted frequency.
  • Can be employed for active integrated antenna applications.

The University of Alabama Research Office of Innovation and Commercialization (OIC) is a non-profit corpo­ration that is responsible for commercializing University of Alabama technologies and for supporting University research. At OIC, we seek parties that are interested in learning more about our technologies and commercialization opportunities, and we welcome any inquiries you may have.


Contact Information

TTO Home Page:

Name: Lynnette Scales

Title: Administrative Assistant

Department: Office for Innovation & Commercialization


Phone: (205) 348-5433