New Researches in Electronic Defense Systems

New Researches in Electronic Defense Systems

Improvement of Bandwidth and Reduction of X-Pol in Rectangular Patch Antenna with Elliptical DGS

Document Type : Original Article

Author
mehdi aslinezhad
Assistant professor, Department of Electrical Engineering, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran.
10.22034/joeds.2025.501000.1081
Abstract
In this paper A novel microstrip patch antenna with band width improvement and low cross polarization level is presented. The use of DGS on the ground plane of the substrate is easy and can simply be applied in many microwave designs. The proposed design for the low cross polarization level and band width improved patch antenna consist of elliptical-slots on ground and Creation of Modifications and Defects in the Ground Plane of Microstrip Antenna. These practices reduce the strength of unwanted radiated fields of microstrip patch antenna that results low cross polarization level and improve band width of antenna. To validate the result a reference patch antenna with conventional ground plane is designed and compared with proposed antenna. The designed antenna cross polarization level and band width are improved about 20dB and 15% respectively compared with microstrip patch antenna with conventional ground plane. The purposed antenna XP (cross-polarized) ratio has remarkable improvement in impedance bandwidth that is from 3.7GHz to 4.5GHz.
Keywords
low cross polarization
defect ground structure
microstrip
patch antenna
New Researches in Electronic Defense Systems
Volume 4, Issue 10
Winter 2025
Pages 16-21