A Novel Printed Antenna for Polarization Modulation
Location
CSU 203
Start Date
20-4-2015 10:00 AM
End Date
20-4-2015 11:00 AM
Student's Major
Electrical and Computer Engineering and Technology
Student's College
Science, Engineering and Technology
Mentor's Name
Xuanhui Wu
Mentor's Email Address
xuanhui.wu@mnsu.edu
Mentor's Department
Electrical and Computer Engineering and Technology
Mentor's College
Science, Engineering and Technology
Description
Traditionally, a communication system modulates digital signals on either frequency, phase or amplitude of a waveform. A combination of these modulation techniques gives a high data throughput to satisfy the demands for higher data rate nowadays. Since all the degree of freedom on those signal dimensions are used up, it is necessary to look for a new dimension for modulation to further improve the data throughput. It comes to the polarity of the electromagnetic wave, which can be utilized to modulate digital signals. Such a technique is called polarization modulation [1, 2]. This technique leads to power loss in the novel ports, hence reducing the efficiency of the antenna. For solving the issue, we placed RF switches at all the ports. RF switches will be used to electrically activate one of those ports based on the digital information. A commercial software package called HyperLynx from Mentor Graphics has been used to design a single element circular patch antenna. The radiating element is then fed by four microstrip lines, with a 45 degree separation. The antenna have at least 17 dB return loss for each port and a broadside radiation pattern. Next, a 2X2 antenna has been designed using the radiating element obtained in the first stage. The antenna elements is separated with a distance of around half wavelength at the carrier frequency. An RF switch had been setup on the feeding line of each antenna element in order to electrically change the polarization for the modulation purpose.
A Novel Printed Antenna for Polarization Modulation
CSU 203
Traditionally, a communication system modulates digital signals on either frequency, phase or amplitude of a waveform. A combination of these modulation techniques gives a high data throughput to satisfy the demands for higher data rate nowadays. Since all the degree of freedom on those signal dimensions are used up, it is necessary to look for a new dimension for modulation to further improve the data throughput. It comes to the polarity of the electromagnetic wave, which can be utilized to modulate digital signals. Such a technique is called polarization modulation [1, 2]. This technique leads to power loss in the novel ports, hence reducing the efficiency of the antenna. For solving the issue, we placed RF switches at all the ports. RF switches will be used to electrically activate one of those ports based on the digital information. A commercial software package called HyperLynx from Mentor Graphics has been used to design a single element circular patch antenna. The radiating element is then fed by four microstrip lines, with a 45 degree separation. The antenna have at least 17 dB return loss for each port and a broadside radiation pattern. Next, a 2X2 antenna has been designed using the radiating element obtained in the first stage. The antenna elements is separated with a distance of around half wavelength at the carrier frequency. An RF switch had been setup on the feeding line of each antenna element in order to electrically change the polarization for the modulation purpose.
Recommended Citation
Tasrif, Syed. "A Novel Printed Antenna for Polarization Modulation." Undergraduate Research Symposium, Mankato, MN, April 20, 2015.
https://cornerstone.lib.mnsu.edu/urs/2015/oral_session_03/3
