scholarly journals Characterization of CVD graphene permittivity and conductivity in micro-/millimeter wave frequency range

AIP Advances ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 095014 ◽  
Author(s):  
Yunqiu Wu ◽  
Yun Wu ◽  
Kai Kang ◽  
Yuanfu Chen ◽  
Yanrong Li ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Wave Frequency ◽  
Frequency Range ◽  
Cvd Graphene

Study of transmission line attenuation in broad band millimeter wave frequency range

2013 ◽  
Vol 84 (10) ◽  
pp. 103505 ◽  
Author(s):  
Hitesh Kumar B. Pandya ◽  
M. E. Austin ◽  
R. F. Ellis
Keyword(s):  
Transmission Line ◽  
Millimeter Wave ◽  
Broad Band ◽  
Wave Frequency ◽  
Frequency Range

A novel planar level chip interconnection for unpackaged MMICs in the millimeter wave frequency range

2011 ◽  
Author(s):  
Florian Poprawa ◽  
Andreas Ziroff ◽  
Christina Schindler ◽  
Abdellatif Zanati ◽  
Frank Ellinger
Keyword(s):  
Millimeter Wave ◽  
Wave Frequency ◽  
Frequency Range

Beam-Steerable Antenna Array with Metasurface at Millimeter Wave Frequency Range

2019 ◽  
Author(s):  
Syeda Iffat Naqvi ◽  
Muhammad Awais Azam ◽  
Yasar Amin ◽  
Jonathon Loo ◽  
Hannu Tenhunen
Keyword(s):  
Antenna Array ◽  
Millimeter Wave ◽  
Wave Frequency ◽  
Frequency Range ◽  
Steerable Antenna

Bulk and In-Circuit Dielectric Characterization of LTCC Tape Systems Through Millimeter Wave Frequency Range

2011 ◽  
Vol 2011 (1) ◽  
pp. 000740-000746 ◽  
Author(s):  
Bradley Thrasher ◽  
Deepukumar Nair ◽  
James Parisi ◽  
Glenn Oliver ◽  
Michael A. Smith
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Millimeter Wave ◽  
Design Stage ◽  
Frequency Range ◽  
Dielectric Thickness ◽  
Dielectric Characterization ◽  
Wide Range ◽  
Comprehensive Characterization

Low Temperature Co-fired Ceramic (LTCC) material systems offer a highly versatile microwave and millimeter wave packaging platform. Extremely low microwave loss, excellent control of dielectric constant, uniform dielectric thickness, non-existent water absorption leading to very high hermeticity, ability to support multilayer structure leading to 3-dimensional packaging, ability to embed passive functions within the tape layers, availability of a wide range of metallizations, etc. are some of the key advantages of LTCC for microwave packaging. One of the important parameters which needs to be determined at the very early stages of circuit designs are the dielectric properties - dielectric constant and loss tangent, both of which are functions of frequency. These properties need to be known accurately over the entire frequency range of operation for the circuit. For LTCC based designs, the use of dielectric constant of bulk material can lead to deviations between the performance expected at the design stage and for the fabricated circuit. Such deviations are a significant concern for broadband circuits as well as for circuits with sharp resonant behavior such as filters. One of the significant sources of deviation between bulk LTCC and “in-circuit” dielectric constant is the nature of the thick film metallizations used in LTCC technology. Work described here is a comprehensive characterization of three DuPont™ GreenTape™ LTCC systems 951, 943, and 9K7 - in the frequency range 10 to 70 GHz. Both bulk and “in-circuit” dielectric properties with silver and gold metallizations are studied to quantify the deviations in dielectric properties. A Fabry-Perot open resonator technique is used for the bulk characterization while printed ring resonators are used for the in-circuit characterization. This comprehensive characterization will provide key design data for LTCC designers in the 10 – 70 GHz frequency range.

Dual band T Shaped Antenna at Millimeter Wave Frequency for 5G Applications

2021 ◽  
Vol 9 (VII) ◽  
pp. 1658-1660
Author(s):  
Prishail Mishra
Keyword(s):  
Millimeter Wave ◽  
Radiation Efficiency ◽  
Wave Frequency ◽  
Dual Band ◽  
Frequency Range ◽  
Dual Band Antenna ◽  
Compact Size

In this paper, there is a t shaped antenna patch on a 12mm X 12mm plane, with another patch which is inverted T shaped patch on the same plane. Its operated in the frequency range of 24GHz to 40GHz. It is a millimeter wave frequency antenna for 5th generation applications. Owing to its compact size it has less complexity, and fed by waveguide on both sides of patch[1]. It gives a bandwidth of 2GHz and 5.6 GHz in the range 24-26 GHz and 30-35GHz respectively. Radiation efficiency is of 83% at 40 GHz and directivity of 5.27 . We get to see two resonating frequencies, one at 28GHz and other at 37 GHz thus creating dual band antenna[2].

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