| 1. |
- Amendola, Giandomenico, et al.
(författare)
-
Low-Earth Orbit User Segment in the Ku and Ka-Band
- 2023
-
Ingår i: IEEE Microwave Magazine. - : Institute of Electrical and Electronics Engineers (IEEE). - 1527-3342 .- 1557-9581. ; 24:2, s. 32-48
-
Tidskriftsartikel (refereegranskat)abstract
- Low-Earth orbit (LEO) constellations are revolutionizing the world of satellite communication (Satcom), providing new opportunities to manufacturers and operators and enabling innovative and attractive services to users.
|
|
| 2. |
|
|
| 3. |
- Bistarelli, Silvia, et al.
(författare)
-
Evaluating CNT-Based Interconnects : A Nummerical Tool to Characterize Hybrid CNT-Copper Interconnects
- 2017
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 18:4, s. 124-129
-
Tidskriftsartikel (refereegranskat)abstract
- Nanotechnologies offer a vast number of applications due to the unique features of nanostructured materials [1]. In the electronics field, this new technology could open innovative ways to go beyond Moore's law [2], but progress in manufacturing technology still limits the wide dispersion of nanotechnology-based circuits. The bridge between nanoscience and realized devices can be achieved by modeling the multiphysics phenomena at the nanoscale, which will aid in the development of the technology.
|
|
| 4. |
- Callebaut, Gilles, et al.
(författare)
-
6G Radio Testbeds: Requirements, Trends, and Approaches
- 2024
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 25:4, s. 14-31
-
Tidskriftsartikel (refereegranskat)abstract
- The proof of the pudding lies in eating, and that is why 6G testbeds are essential in the progress toward the next generation of wireless networks. Theoretical research toward 6G wireless networks proposes advanced technologies to serve new applications and drastically improve energy performance. Testbeds are indispensable to validate these new technologies under more realistic conditions. This article clarifies the requirements for 6G radio testbeds, reveals trends, and introduces approaches toward their development.
|
|
| 5. |
- Fager, Christian, 1974, et al.
(författare)
-
Linearity and Efficiency in 5G Transmitters: New Techniques for Analyzing Efficiency, Linearity, and Linearization in a 5G Active Antenna Transmitter Context
- 2019
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 20:5, s. 35-49
-
Tidskriftsartikel (refereegranskat)abstract
- Every new generation of mobile systems should provide higher capacity, serve more users, be more energy efficient, and have lower cost. Radio-access hardware constitutes a major bottleneck for reaching these goals, which is a particularly noticeable issue now that 5G communication systems are being developed. A combination of breakthroughs in communication theory-as in massive multiple input/multiple output (MIMO) [1], highly integrated semiconductor and packaging technologies, and extended spectrum allocations- has enabled a paradigm shift in the way radio hardware will be realized. Today's high-power, fewantenna, sectorized systems will soon be replaced with highly integrated active antenna systems having up to hundreds of individually driven low-power radios operating with very wideband signals.
|
|
| 6. |
- Fhager, Andreas, 1976, et al.
(författare)
-
Microwave Diagnostics Ahead: Saving Time and the Lives of Trauma and Stroke Patients
- 2018
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 19:3, s. 78-90
-
Tidskriftsartikel (refereegranskat)abstract
- Microwave technology has the potential to revolutionize how, when, and what care can be delivered to patients with acute, life-threatening medical conditions. The prospects are that microwave systems can both improve diagnostic ability and accuracy and enable earlier diagnosis. Early diagnosis is a key factor in acute situations, especially when breathing and circulation are affected. Conventional imaging modalities used for diagnostics, such as magnetic resonance imaging (MRI) and X-ray computed tomography (CT), are powerful but normally available only at hospitals.
|
|
| 7. |
|
|
| 8. |
- Gevorgian, Spartak, 1948
(författare)
-
Agile microwave devices
- 2009
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 10:5, s. 93-98
-
Tidskriftsartikel (refereegranskat)
|
|
| 9. |
- He, Zhongxia Simon, 1984, et al.
(författare)
-
Modulator and Demodulator Solutions for Real-Time Communication Toward 100 Gb/s: Realtime Modem Solution towards 100 Gb/s
- 2023
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 24:8, s. 35-49
-
Tidskriftsartikel (refereegranskat)abstract
- Due to government and other agency regulations, microwave bands, which range in frequency from 6 to 42 GHz, often have a small bandwidth of a few hundred megahertz, which lowers the data rate for communications. On the other hand, high data rate communications can be realized in millimeter-wave (mm-Wave) frequencies (30-300 GHz). Tens of gigabits per second of bandwidth are available in mm-Wave bands, such as the D-band, from 110 to 170 GHz, and H-band, from 170 to 260 GHz.
|
|
| 10. |
- Kruglov, Dmitrii, 1994, et al.
(författare)
-
Enhancing mmWave On-Chip-Antennas Using In-Package Electromagnetic Bandgap Structures
- 2021
-
Ingår i: European Microwave Conference. - 1527-3342 .- 1557-9581. - 9782874870637 ; , s. 885-888
-
Konferensbidrag (refereegranskat)abstract
- We propose a silicon on-Chip-in-Package antenna design featuring a simulated radiation efficiency of > 70% and an S11 matching better than −10 dB in the 112–125 GHz frequency range. High radiation performance is achieved by: (i) thinning the silicon substrate down to 100 μm through wafer-level grinding; (ii) embedding the IC in-between two PCBs, one of which forms an electromagnetic bandgap structure that attenuates the EM leakage inside the silicon substrate. Furthermore, since the die-embedding concept employs the gap-waveguide packaging technology, a universal contactless waveguide interconnect is realized between the IC and the radiating gap waveguide in the package. This will also enable modular antenna designs.
|
|
| 11. |
- Lai, Szhau, 1985, et al.
(författare)
-
LDMOS Modeling
- 2013
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 14:1, s. 108-116
-
Tidskriftsartikel (refereegranskat)abstract
- This article describes the detailed efforts of the winning contribution of the first student competition in microwave transistor modeling, held at the 2012 International Microwave Symposium (IMS2012) in Montreal, Quebec, Canada. The competition was sponsored by MTT-1, Freescale Semiconductor Inc., and WIN Semiconductor Inc. The transistor modeled was a commercially available high-power device from Freescale, and the characterization data required for modeling was distributed to all competitors. No measurements were to be carried out by the participants, so all students world wide, even those without expensive transistor characterization equipment, could participate. The main objectives of the competition were to identify the technology and develop a nonlinear model from the provided measurement data set [e.g., cold field effect transistor (FET) measurements, pulsed IV, IV versus temperature, S parameter versus bias, and pulsed S-parameter measurements] . The developed model was also to be validated versus large signal one-and two-tone measurements. The validation data was in the form of output power and power added efficiency (PAE) versus input power and measured at two different conditions, e.g., input/output terminations for maximum efficiency and maximum output power, respectively. An accurate model should be able to predict the large signal measurements across the full range of input power levels and bias points available. The judgment of the modeling result was based on the agreement between model simulation and measurement in terms of output power, efficiency, and third-order intermodulation (IM3) versus input power, several of which were not provided to the competitors. © 2000-2012 IEEE.
|
|
| 12. |
- Landin, Per, 1983, et al.
(författare)
-
WebLab: A Web-Based Setup for PA Digital Predistortion and Characterization
- 2015
-
Ingår i: IEEE Microwave Magazine. - : Institute of Electrical and Electronics Engineers (IEEE). - 1527-3342 .- 1557-9581. ; 16:1, s. 138-140
-
Tidskriftsartikel (refereegranskat)abstract
- The WebLab that is described here was initially motivated by the 2014 IEEE Microwave Theory and Techniques Society International Microwave Symposium's (IMS2014's) Student Design Competition on Digital Predistortion (DPD) Linearization, described in "Accurate Linearization with Low-Complexity Models Using Cascaded Digital Predistortion Systems," by Barradas et. al on page 94 in this issue of IEEE Microwave Magazine. To make a comparison of DPD algorithm performance, it is necessary to have one device under test (DUT), a Doherty power amplifier (PA), and one measurement setup for everybody to use. This was not a problem for the finals of the competition because the competitors would all be physically present at the same location. However, for the preparations starting half a year in advance, this posed a serious problem. The solution we implemented takes advantage of the fact that most universities today provide a decent Internet connection for their employees and students. A remotely accessible WebLab seemed to be a viable solution to the problem of letting the competitors practice on the actual DUT using the same measurement setup before the final competition at IMS2014. We decided to construct a Web-based remote-controlled PA measurement setup that allowed any user (not only the competitors) to upload his or her own input data and download the resulting measured output data.
|
|
| 13. |
- Lasser, Gregor, 1983, et al.
(författare)
-
IMS2022 Student Paper Competition
- 2022
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 23:5, s. 123-
-
Tidskriftsartikel (refereegranskat)
|
|
| 14. |
- Mashad Nemati, Hossein, 1980, et al.
(författare)
-
High-Efficiency Power Amplifier
- 2011
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 12:1, s. 81-84
-
Tidskriftsartikel (refereegranskat)abstract
- P As are usually the most powerconsuming circuit blocks in wireless communication systems. The overall power efficiency of the system is therefore highly dependent on the PA efficiency. The maximum achievable PA efficiency is determined by the RF power transistor technology as well as the external circuitry, which makes the transistor operate in a certain class of operation. Various high-efficiency classes, including switched-mode and harmonically tuned classes, have been proposed in the literature to achieve theoretical efficiencies of up to 100%. © 2011 IEEE.
|
|
| 15. |
- Nader, Charles, et al.
(författare)
-
Wideband Radio Frequency Measurements : From instrumentation to sampling theory
- 2013
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 14:2, s. 85-98
-
Tidskriftsartikel (refereegranskat)abstract
- Whether listening to broadcast radio or testing developed wireless devices, for civilian or military applications, based on terrestrial or spatial links, a radio frequency (RF) receiver with good measurement capabilities that preserves the received signal information is required. Todays RF measurement receivers with wideband capabilities are split into two groups based on the measurement strategy they adopt. Both groups produce a time domain waveform with both amplitude and phase information that is constructed either from a transformation of its frequency contents or directly from its time-domain samples.
|
|
| 16. |
- Pandian, J. D., et al.
(författare)
-
Low-noise 6-8 GHz receiver
- 2006
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 7:6, s. 74-84
-
Tidskriftsartikel (refereegranskat)
|
|
| 17. |
- Pengelly, R., et al.
(författare)
-
Doherty's Legacy
- 2016
-
Ingår i: IEEE Microwave Magazine. - : Institute of Electrical and Electronics Engineers (IEEE). - 1527-3342 .- 1557-9581. ; 17:2, s. 41-58
-
Forskningsöversikt (refereegranskat)abstract
- William H. Doherty was an American electrical engineer, best known for his invention of the Doherty amplifier. Born in Cambridge, Massachusetts, in 1907, Doherty attended Harvard University, where he received his bachelor's degree in communication engineering (1927) and his master's degree in engineering (1928). He then joined the American Telegraph and Telephone Company Long Lines Department in Boston. He remained there for a few months before joining the National Bureau of Standards, where he researched radio phenomena. Doherty joined Bell Telephone Laboratories (now Bell Labs) in 1929 and, while there, worked on the development of high power radio transmitters that were used for transoceanic radio telephones and broadcasting.
|
|
| 18. |
|
|
| 19. |
- Sorrentino, R., et al.
(författare)
-
European Microwaves
- 2012
-
Ingår i: IEEE Microwave Magazine. - : Institute of Electrical and Electronics Engineers (IEEE). - 1527-3342 .- 1557-9581. ; 13:6, s. 65-79
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The European Microwave Association (EuMA), as an international nonprofit association, works with the aim of developing education, training, and research activities in the area of microwave technology in Europe. In the Göteborg region of Spain, microwave and millimeter-wave (mm-wave) links for microwave backhaul are developed and produced from 7 to 40 GHz, lately also at E-band. At the Aalto University in Finland, microwave techniques and related topics such as electromagnetics, antennas and propagation, RF circuit design, circuit theory, microwave remote sensing, and radio communications are studied and taught, mainly at the Department of Radio Science and Engineering. Polish microwave engineering activities date back to the late 1940s with the advent of the first Polish microwave tube: a pulse magnetron model M2, developed by the Telecommunications Research Institute (PIT) in collaboration with the Warsaw University of Technology.
|
|
| 20. |
- Swahn, Thomas, 1961, et al.
(författare)
-
ICs for 100-Gb/s Serial Operation
- 2009
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 10:2, s. 58-67
-
Tidskriftsartikel (refereegranskat)abstract
- The building blocks of 100-Gb/s serial transmission system of Integrated Circuits (IC) for communication systems has been discussed. The transceiver building blocks has been grouped into three application areas such as Blue building blocks, Green building blocks, and Orange building blocks. The products will play very important role in solving immediate bandwidth needs, apart from providing future applications and services, such as remote-presence applications, high- definition cinema and three-dimensional applications. The cost-effective and highly integrated systems must be developed, for enabling a volume penetration of 100 Gb/s systems. The IC technologies which currently have proven to be most suitable for these high-speed transceiver electronics are indium phosphide and silicon germanium HBT technologies.
|
|
| 21. |
- Tatu, Serioja Ovidiu, et al.
(författare)
-
Multiport Technology : The New Rise of an Old Concept
- 2014
-
Ingår i: IEEE Microwave Magazine. - : IEEE. - 1527-3342 .- 1557-9581. ; 15:7, s. 34-44
-
Tidskriftsartikel (refereegranskat)abstract
- This article provides an overview of the basics, possible applications, and specific calibration procedures for the six-port circuit, which is the most common multiport implementation of this promising architecture.
|
|
| 22. |
- Töpfer, Fritzi, et al.
(författare)
-
Millimeter-Wave Tissue Diagnostics : The most promising fields for medical applications
- 2015
-
Ingår i: IEEE Microwave Magazine. - 1527-3342 .- 1557-9581. ; 16:4, s. 97-113
-
Tidskriftsartikel (refereegranskat)abstract
- At the end of the 19th century, researchers observed that biological substances have frequency-dependent electrical properties and that tissue behaves like a capacitor [1]. Consequently, in the first half of the 20th century, the permittivity of many types of cell suspensions and tissues was characterized up to frequencies of approximately 100 MHz. From the measurements, conclusions were drawn, in particular, about the electrical properties of the cell membranes, which are the main contributors to the tissue impedance at frequencies below 10 MHz [2]. In 1926, a study found a significant different permittivity for breast cancer tissue compared with healthy tissue at 20 kHz [3]. After World War II, new instrumentation enabled measurements up to 10 GHz, and a vast amount of data on the dielectric properties of different tissue types in the microwave range was published [4]-[6].
|
|
| 23. |
- Akhavan, Sharareh, et al.
(författare)
-
Practitioner and Client Explanations for Disparities in Health Care Use Between Migrant and Non-migrant Groups in Sweden : A Qualitative Study
- 2013
-
Ingår i: Journal of Immigrant and Minority Health. - : Springer. - 1557-1912 .- 1557-1920. ; 15:1, s. 188-197
-
Tidskriftsartikel (refereegranskat)abstract
- To investigate variations in explanations given for disparities in health care use between migrant and nonmigrant groups, by clients and care providers in Sweden. Qualitative evidence collected during in-depth interviews with five ‘migrant’ health service clients and five physicians. The interview data generated three categories which were perceived by respondents to produce ethnic differences in health service use: ‘‘Communication issues’’, ‘‘Cultural differences in approaches to medical consultations’’ and ‘‘Effects of perceptions of inequalities in care quality and discrimination’’. Explanations for disparities in health care use in Sweden can be categorized into those reflecting social/structural conditions and the presence/absence of power and those using cultural/behavioural explanations. The negative perceptions of ‘migrant’ clients held by some Swedish physicians place the onus for addressing their poor health with the clients themselves and risks perpetuating their health disadvantage. The power disparity between doctors and ‘migrant’ patients encourages a sense of powerlessness and mistreatment among patients.
|
|
| 24. |
- Fhager, A., et al.
(författare)
-
Microwave Diagnostics Ahead
- 2018
-
Ingår i: Ieee Microwave Magazine. - : Institute of Electrical and Electronics Engineers (IEEE). - 1527-3342. ; 19:3, s. 78-90
-
Tidskriftsartikel (refereegranskat)abstract
- Microwave technology has the potential to revolutionize how, when, and what care can be delivered to patients with acute, life-threatening medical conditions. The prospects are that microwave systems can both improve diagnostic ability and accuracy and enable earlier diagnosis. Early diagnosis is a key factor in acute situations, especially when breathing and circulation are affected. Conventional imaging modalities used for diagnostics, such as magnetic resonance imaging (MRI) and X-ray computed tomography (CT), are powerful but normally available only at hospitals.
|
|
| 25. |
- Molisch, Andreas, et al.
(författare)
-
MIMO systems with antenna selection
- 2004
-
Ingår i: IEEE Microwave Magazine. - 1527-3342. ; 5:1, s. 46-56
-
Tidskriftsartikel (refereegranskat)
|
|
