Quasi-optical millimeter-wave band-pass filters using high-T/sub c/ superconductors

1991 ◽  
Vol 39 (9) ◽  
pp. 1493-1497 ◽  
Author(s):  
D. Zhang ◽  
M. Matloubian ◽  
T.W. Kim ◽  
H.R. Fetterman ◽  
K. Chou ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Wave Band ◽  
Millimeter Wave Band ◽  
Band Pass

A Novel Compact On-Chip Millimeter-Wave Band-Pass Filter with GaAs pHEMT Technology

2021 ◽  
Author(s):  
Wen-Tao Wang ◽  
Hao-Ran Zhu ◽  
Yu-Fa Sun ◽  
Zhi-Xiang Huang ◽  
Xian-Liang Wu
Keyword(s):  
Millimeter Wave ◽  
Band Pass Filter ◽  
Wave Band ◽  
Pass Filter ◽  
Millimeter Wave Band ◽  
Band Pass ◽  
On Chip

scholarly journals LDS Realization of High-Q SIW Millimeter Wave Filters with Cyclo-Olefin Polymers

2018 ◽  
Vol 8 (11) ◽  
pp. 2230 ◽  
Author(s):  
Adrien Glise ◽  
Yves Quéré ◽  
Azar Maalouf ◽  
Eric Rius ◽  
Vincent Castel ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
The Body ◽  
Wave Band ◽  
Quality Factors ◽  
Molding Process ◽  
Microwave Cavities ◽  
Low Dielectric ◽  
Millimeter Wave Band ◽  
Band Pass ◽  
Wave Filters

In this paper, we present narrow-band substrate integrated waveguide (SIW) millimeter wave band-pass filters, designed using cyclo-olefin polymers (COP). The structures were molded, drilled, and metalized with a laser direct structuring (LDS) process. COP are a type of thermoplastic with low dielectric losses in the millimeter waveband, typically 7.5 × 10−4 at 40 GHz for the COP RS420-LDS from Zeon®. The body of the filter was realized using a molding process that facilitates the combination of thin 50 Ω microstrip access lines with high thickness microwave cavities through 3D transitions, thus making high quality factors attainable. The simulations and experimental results are presented and discussed.

scholarly journals Low-loss and tunable millimeter-wave filters using spherical dielectric resonators

2020 ◽  
pp. 1-5
Author(s):  
Utpal Dey ◽  
Julio Gonzalez Marin ◽  
Jan Hesselbarth
Keyword(s):  
Millimeter Wave ◽  
Insertion Loss ◽  
Integrated Circuit ◽  
Circuit Board ◽  
Dielectric Resonators ◽  
Band Pass Filter ◽  
Wave Band ◽  
Pass Filter ◽  
Millimeter Wave Band ◽  
Band Pass

Abstract Millimeter-wave band-pass filters using spherical dielectric resonators are presented. The dielectric spheres are sandwiched between metal plates and are excited by a simple microstrip line structure on a thin-film circuit board. As such, these filters could also be implemented in the back-end-of-line layers of an integrated circuit. A single resonator, based on a diameter 0.6 mm alumina ceramic sphere, is shown to resonate with high unloaded Q-factor of 750 at 170 GHz. A three-sphere band-pass filter is measured showing <5 dB insertion loss and 0.4% bandwidth at 170 GHz. A concept for mechanically tuning of a two-sphere band-pass filter is demonstrated for a filter operating around 105 GHz. The measured filter shows approximately 5 dB insertion loss and <0.5% bandwidth and its passband can be varied over 3 GHz of frequency, or 3%. Technological challenges are discussed.

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.

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