Frequency Reconfigurable Microstrip Patch Antenna

1. Frequency Reconfigurable Microstrip Patch Antenna Research Supported by: NSF CAREER Grant #ECCS-0845822 Antenna and Microwave Laboratory (AML) Student: Rafid N. Damman Professor: Dr. Satish K. SharmaGraduate Student Mentor: Jennifer Taylor • Project Goals • Microstrip patch antenna that can be reconfigured to operate at two frequencies:1.8GHz and 2.4GHz • Find the best parameters for the antenna to achieve the best gain, matching, and acceptable radiation pattern. • Utilized PIN Diode RF switches to make the antenna reconfigurable • Ansoft/AnSys HFSS software used to model the RF switches and patch antenna. 2D Radiation Pattern: 1.8GHz 3D Radiation Pattern: 1.8GHz Antenna Geometry 2D Radiation Pattern: 2.4GHz 3D Radiation Pattern: 2.4GHz Key Substrate thickness: 0.8mm Substrate Dielectric Constant: 4.4 PIN Diode: • Approach • Upon knowing the thickness and the dielectric constant of the substrate material I can calculate the width and length of my rectangular patch using the equations given in the Antenna Theory and Design textbook by Balanis. • I run many simulations to find the exact configurations for the two different lengths to have a resonant frequency of 1.8GHz and 2.4GHz and the best matching levels. • Finally, I will include five PIN Diode switches to be able to add the specified length to the antenna so that the single antenna can operate at the two different frequencies. S11 • Conclusion • The reconfigurable microstrip patch antenna was designed with two different frequencies to operate from 1.75GHz to 1.85GHz and 2.36GHz to 2.42GHz depending on the ON or OFF state of the five switches. • These two bands are used in many wireless communication applications including cell phone and Bluetooth technologies. All Switches OFF All Switches ON