Designed Omnidirectional Antenna of Quarter-Mode Substrate-Integrated Waveguide Element with Characteristic Mode...

Area of Science:

• Electromagnetics and Antenna Theory
• Wireless Communication Systems

Background:

• Omnidirectional antennas are crucial for ubiquitous wireless connectivity.
• Efficient antenna design is key for emerging applications like wireless energy harvesting.
• Characteristic Mode Analysis (CMA) provides a powerful framework for antenna design and optimization.

Purpose of the Study:

• To investigate the design of omnidirectional antennas using Characteristic Mode Analysis (CMA).
• To explore and compare two distinct feeding methods for omnidirectional antennas.
• To evaluate antenna performance metrics such as bandwidth, gain, and profile for wireless energy harvesting.

Main Methods:

• Utilized Characteristic Mode Analysis (CMA) for antenna design.
• Implemented two feeding strategies: equal-amplitude in-phase excitation and equal-amplitude 180° phase difference excitation.
• Analyzed antenna performance including operating bandwidth and peak gain.

Main Results:

• Achieved operating bandwidths of 2.45-2.58 GHz and 2.42-2.45 GHz for the two designs.
• Obtained peak gains of 4.1 dBi and 4.4 dBi at 2.45 GHz.
• Demonstrated high gain and low-profile characteristics for both antenna designs.

Conclusions:

• The proposed omnidirectional antennas, designed with CMA and specific feeding methods, meet key performance requirements.
• The antennas' high gain and low-profile nature make them highly suitable for wireless energy harvesting systems.
• This research contributes to the advancement of efficient antenna solutions for wireless power transfer.