State-of-the-art realization of millimeter-wave systems: a technology survey

1990 ◽  
Author(s):  
Holger H. Meinel
Keyword(s):  
Millimeter Wave ◽  
State Of The Art

Demonstration of Constant 8 W/mm Power Density at 10, 30, and 94 GHz in State-of-the-Art Millimeter-Wave N-Polar GaN MISHEMTs

2018 ◽  
Vol 65 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Brian Romanczyk ◽  
Steven Wienecke ◽  
Matthew Guidry ◽  
Haoran Li ◽  
Elaheh Ahmadi ◽  
...  
Keyword(s):  
Power Density ◽  
Millimeter Wave ◽  
State Of The Art

Comment on "Millimeter-wave generation with plasma devices: The state of the art"

1969 ◽  
Vol 57 (5) ◽  
pp. 836-837
Author(s):  
J. Asmussen ◽  
J.B. Beyer ◽  
R.E. McIntosh
Keyword(s):  
Millimeter Wave ◽  
State Of The Art ◽  
Wave Generation ◽  
The State

Multi-Channel Radiometry in MMW Imaging Systems

2000 ◽  
Vol 631 ◽  
Author(s):  
V. S. Ablyazov ◽  
V. V. Abramov ◽  
V. E. Lyubchenko ◽  
K. T. Mourzabulatov ◽  
S. Yu. Turigin
Keyword(s):  
Millimeter Wave ◽  
Time Constant ◽  
State Of The Art ◽  
Field Of View ◽  
Imaging Systems ◽  
One Dimension ◽  
Parabolic Antenna ◽  
Mechanical Scanning

ABSTRACTState of the art in development of millimeter wave radiometric imaging systems is analyzed and discussed. One-dimension array of 16 radiometers with mechanical scanning of the offset parabolic antenna is experimentally demonstrated that offers rms 0.03 K at time constant 1 s and instant field of view of 4×60 mrad.

scholarly journals A Millimeter-Wave 4th-Harmonic Schottky Diode Mixer with Integrated Local Oscillator

2021 ◽  
Vol 11 (16) ◽  
pp. 7238
Author(s):  
José M. Pérez-Escudero ◽  
Carlos Quemada ◽  
Ramón Gonzalo ◽  
Iñigo Ederra
Keyword(s):  
Millimeter Wave ◽  
Schottky Diode ◽  
Experimental Validation ◽  
State Of The Art ◽  
Schottky Diodes ◽  
Noise Temperature ◽  
Local Oscillator ◽  
Conversion Loss ◽  
Fourth Harmonic ◽  
Equivalent Noise Temperature

In this paper the design and experimental validation of a fourth-harmonic mixer based on Schottky diodes working around 300 GHz is presented. The main novelty of this work consists in the integration of an MMIC-based local oscillator, working around 75 GHz, and a mixer in the same metallic block housing. A prototype has been characterized using the Y-Factor method and yields a best measured conversion loss and an equivalent noise temperature of 14 dB and 9600 K, respectively. This performance is comparable to the state-of-the-art for this type of mixer.

The Sunyaev-Zeldovich Effect Imaging and Interferometry: BIMA-CBI-OVRO State of the Art and Future Prospects

2005 ◽  
Vol 201 ◽  
pp. 219-228
Author(s):  
Steven T. Myers
Keyword(s):  
Dark Matter ◽  
High Temperature ◽  
Millimeter Wave ◽  
State Of The Art ◽  
Cosmological Parameters ◽  
Low Energy ◽  
Clusters Of Galaxies ◽  
Future Prospects ◽  
Ionized Gas ◽  
Massive Clusters

This talk presents a summary of the most recent results from microwave and millimeter-wave surveys of the Sunyaev-Zeldovich Effect (SZE) in massive clusters of galaxies. The SZE is caused by Compton scattering of low-energy CMB photons off high-temperature ionized gas in cluster atmospheres, and is a direct measurement of the baryon content of the intracluster medium. New results from the Chicago-BIMA SZE survey of Carlstrom et al., the Penn-OVRO SZE program of Mason et al., and the Caltech-CBI SZE project of Padin et al. are discussed, along with prospects for future imaging and interferometric studies of clusters to pin down the astrophysical properties of cluster baryons and dark matter as well as possible constraints on cosmological parameters.

scholarly journals Spatial-Temporal-DBSCAN-Based User Clustering and Power Allocation for Sum Rate Maximization in Millimeter-Wave NOMA Systems

Symmetry ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 1854
Author(s):  
Huu-Trung Hoang ◽  
Quoc-Viet Pham ◽  
Won-Joo Hwang
Keyword(s):  
Power Allocation ◽  
Millimeter Wave ◽  
System Performance ◽  
Clustering Algorithm ◽  
State Of The Art ◽  
Clustering Algorithms ◽  
Real Life ◽  
Multiple User ◽  
User Clustering ◽  
Sum Rate

The combination of millimeter-wave (mmWave) communications and non-orthogonal multiple access (NOMA) systems exploits the capability to serve multiple user devices simultaneously in one resource block. User clustering, power allocation (PA), and hybrid beamforming problems in mmWave-NOMA systems can utilize the network setting’s potential to enhance the system performance. Based on similar characteristics of the spatial distributions of users in real life, we propose a novel spatial-temporal density-based spatial clustering of applications with noise (ST-DBSCAN)-based unsupervised user clustering in order to enhance the system sum-rate. ST-DBSCAN is a state-of-the-art density-based clustering algorithm for solving spatial and non-spatial problems. Moreover, instead of symmetric PA, we propose an inter-cluster PA algorithm. Next, we apply boundary-compressed particle swarm optimization in order to reduce inter-cluster interference and enhance system performance. The simulation results reveal that our proposed solution improves the sum-rate of mmWave-NOMA-based systems when compared with that of mmWave-OMA-based systems. In addition, we compare our proposed algorithm with other benchmark user clustering algorithms in order to investigate the performance of our ST-DBSCAN-based user clustering algorithm. The results also illustrate that our proposed approach outperforms the state-of-the-art user clustering algorithms in mmWave-NOMA systems.

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