scholarly journals Design of waveguide array frequency selective surface filter in sub-millimeter wave band

2012 ◽  
Vol 61 (22) ◽  
pp. 224102
Author(s):  
Cui Guang-Bin ◽  
Miao Jun-Gang ◽  
Zhang Yong-Fang
Keyword(s):  
Millimeter Wave ◽  
Frequency Selective Surface ◽  
Waveguide Array ◽  
Wave Band ◽  
Millimeter Wave Band ◽  
Frequency Selective

scholarly journals A transmit/reflect switchable frequency selective surface based on all dielectric metamaterials

2015 ◽  
Vol 05 (04) ◽  
pp. 1550035 ◽  
Author(s):  
Fei Yu ◽  
Jun Wang ◽  
Jiafu Wang ◽  
Hua Ma ◽  
Hongliang Du ◽  
...  
Keyword(s):  
Effective Medium Theory ◽  
Frequency Selective Surface ◽  
Wave Band ◽  
Medium Theory ◽  
Left Handed ◽  
Resonance Frequencies ◽  
Induced Field ◽  
Millimeter Wave Band ◽  
Frequency Selective ◽  
Magnetic Resonances

In this paper, we propose a novel transmit/reflect switchable frequency selective surface (FSS) in millimeter wave band based on the effective medium theory under quasi-static limit, which is designed with square-hole elements cut from continuum dielectric plates. The building elements of the surface are composed of all dielectric metamaterial rather than metal material. With proper structural design and parameters tuning, the resonance frequencies can be tuned appropriately. The frequency response of the surface can be switched from that of a reflecting structure to a transmitting one by rotating the surface [Formula: see text], which means under different incident polarizations. The reflective response can be realized due to the effect of electric and magnetic resonances. Theoretical analysis shows that the reflective response arises from impedance mismatching by electric and magnetic resonances. And the transmitting response is the left-handed passband, arises from the coupling of the electric and magnetic resonances. In addition, effective electromagnetic parameters and the dynamic induced field distributions are analyzed to explain the mechanism of the responses. The method can also be used to design switchable all-dielectric FSS with continuum structures in other frequencies.

scholarly journals 3D Inductive Frequency Selective Structures Using Additive Manufacturing and Low-Cost Metallization

Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 552
Author(s):  
Juan Andrés Vásquez-Peralvo ◽  
Adrián Tamayo-Domínguez ◽  
Gerardo Pérez-Palomino ◽  
José Manuel Fernández-González ◽  
Thomas Wong
Keyword(s):  
Additive Manufacturing ◽  
Millimeter Wave ◽  
Low Cost ◽  
Wave Band ◽  
Copper Electroplating ◽  
Before And After ◽  
Millimeter Wave Band ◽  
Frequency Components ◽  
Band Pass ◽  
Frequency Selective

The use of additive manufacturing and different metallization techniques for prototyping radio frequency components such as antennas and waveguides are rising owing to their high precision and low costs. Over time, additive manufacturing has improved so that its utilization is accepted in satellite payloads and military applications. However, there is no record of the frequency response in the millimeter-wave band for inductive 3D frequency selective structures implemented by different metallization techniques. For this reason, three different prototypes of dielectric 3D frequency selective structures working in the millimeter-wave band are designed, simulated, and manufactured using VAT photopolymerization. These prototypes are subsequently metallized using metallic paint atomization and electroplating. The manufactured prototypes have been carefully selected, considering their design complexity, starting with the simplest, the square aperture, the medium complexity, the woodpile structure, and the most complex, the torus structure. Then, each structure is measured before and after the metallization process using a measurement bench. The metallization used for the measurement is nickel spray flowed by the copper electroplating. For the electroplating, a detailed table showing the total area to be metallized and the current applied is also provided. Finally, the effectiveness of both metallization techniques is compared with the simulations performed using CST Microwave Studio. Results indicate that a shifted and reduced band-pass is obtained in some structures. On the other hand, for very complex structures, as in the torus case, band-pass with lower loss is obtained using copper electroplating, thus allowing the manufacturing of inductive 3D frequency selective structures in the millimeter-wave band at a low cost.

LTCC Partially-Filled Post-Wall Rectangular-Waveguide Slot Array Antenna in the Millimeter-Wave Band

2012 ◽  
Vol E95.C (10) ◽  
pp. 1635-1642 ◽  
Author(s):  
Yuanfeng SHE ◽  
Jiro HIROKAWA ◽  
Makoto ANDO ◽  
Daisuke HANATANI ◽  
Masahiro FUJIMOTO
Keyword(s):  
Millimeter Wave ◽  
Rectangular Waveguide ◽  
Array Antenna ◽  
Wave Band ◽  
Waveguide Slot ◽  
Millimeter Wave Band
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