Applications

Cutting-edge ACE (Applied & Computational Electromagnetic) algorithms developed by the ACE Lab, have been extending the application areas for a variety of electromagnetic software and systems.

Metal-Only Reflectarray (MOR) Antenna

Based on the first reflectarray antenna composed of rectangular waveguides in 1963, novel metal-only reflectarray (MOR) antennas were proposed in 2D (2010) and 3D (2011), respectively. The MOR antenna was analyzed and designed by an overlapping T-block method (OTM) that had been well-studied (2006/2010/2011). Owing to the fact that the MOR is made up of metal only without any dielectrics, the MOR antenna has wideband, extremely low loss, high aperture efficiency, and high power capability for millimeter- and submillimeter-wave bands. The Agency for Defense Development (ADD), Korea initiated and financially supported a project focusing the development of W-band MOR antennas and related high-performance electromagnetic code (HPEC).

• Related Achievements (International Journals)

1. IEEE TAP (Dec. 2011, May 2010, Feb. 2006)

High-performance Electromagnetic Code (HPEC) for Large-scale Antenna Analysis

A high-performance electromagnetic code (HPEC) is widely used to accelerate the computation times of large-scale antenna analysis. OpenMP (Open Multi-Processing) in a single compute node and MPI (Message Passing Interface) in multiple compute nodes enable us to implement the HPEC efficiently. GPU CUDA (Compute Unified Device Architecture) is another parallel option for fast integral and matrix operations. The HPEC using combined ACE algorithms was successfully applied to design a W-band MOR antenna with ultra high gain, which is more than 50 [dBi]. The HPEC, which dramatically reduces the computation times, opens new possibility of an automatic design algorithm (ADA) using genetic algorithm (GA), particle swarm optimization (PSO), and differential evolution (DE).

• Related Achievements (International Journals)

1. IEEE TAP (Dec. 2023, Dec. 2011)

Orbital Angular Momentum (OAM) Radio

The concept of orbital angular momentum (OAM) modes carried by electromagnetic fields was originally developed in the area of optics in 1992. A new multiplexed OAM radio system was proposed and proved experimentally in 2016, where three OAM modes (l = 0, ±1) could be multiplexed in a single Cassegrain antenna system with a 2x2 matrix feed and an OAM mode mux (OMM). Although the OAM radio has inherent physical drawbacks, this radio reveals unique characteristics using OAM mode multiplexing and demultiplexing, thus expecting that the OAM radio can be widely used for next generation wireless communications. The Electronics and Telecommunications Research Institute (ETRI), Korea initiated and financially supported multiple projects for the development of a variety of OAM-generating reflector and reflectarray antennas toward several practical applications.

• OAM Mode-combining and Mode-canceling Relation in Near- and Far-fields

• Generalized Friis Transmission Equation

• Related Achievements (International Journals)

1. SR in Nature (Oct. 2017, Jun. 2016)

2. IEEE TAP (Apr. 2019)

3. ETRIJ (Jun. 2017)

4. IET EL (May 2019, Sep. 2015)