Compact 2-port linearly and circularly polarized antennas using low cross-polarization miniaturized patch

Area of Science:

• Electrical Engineering
• Electromagnetics
• Antenna Theory

Background:

• Miniaturized antennas are crucial for modern wireless systems.
• Achieving low cross-polarization in compact designs remains a challenge.
• Polarization diversity and dual circular polarization enhance system flexibility.

Purpose of the Study:

• To present compact two-port antenna arrays with linear and circular polarization.
• To demonstrate a miniaturized patch radiator with extremely low cross-polarization.
• To enable space-constrained wireless systems with advanced antenna capabilities.

Main Methods:

• A miniaturized rectangular patch radiator loaded with slots and meander-line structures was designed.
• The radiator's equivalent capacitance was increased to lower the resonant frequency.
• Two 2-port array configurations were implemented: one for polarization diversity and one for dual circular polarization.

Main Results:

• The proposed antenna arrays operate at 4.3 GHz with compact physical dimensions.
• Extremely low cross-polarization radiation was achieved.
• The arrays demonstrated stable radiation performance and significantly reduced size compared to existing designs.

Conclusions:

• The developed compact antenna arrays offer efficient linear and circular polarization capabilities.
• The miniaturized radiator design effectively reduces cross-polarization.
• These antennas are well-suited for size-constrained wireless applications requiring reliable performance.