Related Experiment Video
Updated: Jul 21, 2025
13:44
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
15.4K
Low-Profile Millimeter-Wave Metasurface-Based Antenna with Enhanced Bandwidth
1State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Haidian District, Beijing 100876, China.
Micromachines
|July 29, 2023
Summary
A novel low-profile metasurface antenna achieves broadband performance using characteristic mode analysis (CMA) and slot etching techniques. This design enhances bandwidth and reduces cross-polarization for millimeter-wave applications.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Antenna Theory
Background:
- Metasurface antennas offer unique electromagnetic properties.
- Low-profile antennas are crucial for compact electronic devices.
- Millimeter-wave frequencies present challenges for antenna design.
Purpose of the Study:
- To propose a low-profile, broadband metasurface antenna for millimeter-wave applications.
- To utilize Characteristic Mode Analysis (CMA) for antenna design and optimization.
- To enhance impedance bandwidth and reduce cross-polarization.
Main Methods:
- Characteristic Mode Analysis (CMA) for mode excitation and optimization.
- Design of coplanar patches with varying dimensions.
- Etching slots on parasitic and mid patches to introduce new resonant modes and mitigate cross-polarization.
- Direct feeding using a coaxial probe.
Main Results:
- Achieved 25.02% impedance bandwidth from 30-38.58 GHz.
- Realized gain ranges from 8.35-11.3 dB within the operating band.
- The antenna has a compact physical size (1.423×1.423×0.029λ0).
Conclusions:
- The proposed metasurface antenna effectively achieves broadband operation with a low profile.
- CMA is a valuable tool for guiding the design and optimization of such antennas.
- Slot etching is an effective technique for enhancing bandwidth and improving polarization characteristics.
Related Concept Videos
01:23Parallel Resonance
231
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
231
01:28Standing Waves in a Cavity
957
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
957