研究目的
To design dual-band modulated metasurface (MTS) antennas capable of generating RHCP broadside pencil beams at two different frequencies in the K and Ka band.
研究成果
The proposed approach of superimposing two modulations with different periods on the antenna aperture effectively achieves dual-band operation with a single aperture, allowing for the generation of RHCP broadside pencil beams at two different frequencies. The method has been validated through simulation, showing excellent agreement between different simulation methods.
研究不足
The gain × bandwidth product of MTS antennas is directly proportional to the group velocity (vg) of the SW and to the electrical size of the aperture.
1：Experimental Design and Method Selection:
The methodology involves superimposing two modulations with different periods on the antenna aperture to achieve dual-band operation. One modulation produces beam #1 at frequency f1, and the other generates beam #2 at frequency f2. The resulting inductive surface is synthesized using sub-wavelength patches printed on a grounded dielectric slab.
2：The resulting inductive surface is synthesized using sub-wavelength patches printed on a grounded dielectric slab.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: The design example consists of a dual-band antenna with RHCP broadside pencil beams at f1 = 26.25 GHz and f2 = 32.05 GHz.
3：25 GHz and f2 = 05 GHz.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: A RO3010 laminate with thickness h =
4：635 mm and relative permittivity (cid:
304)r = 10.2 is used.
5：2 is used.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The design is first analyzed using a MoM formulation for continuous impedance boundary conditions and then validated with a Fast Multipole Method (FMM) full-wave simulation of the actual structure.
6：Data Analysis Methods:
The effectiveness of the proposed approach is verified through simulation results showing directivity patterns at the two frequencies.
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