Active Multiple Feed On-Chip Antennas With Efficient In-Antenna Power Combining Operating at 200–320 GHz

2017 ◽  
Vol 65 (2) ◽  
pp. 416-423 ◽  
Author(s):  
Benjamin Goettel ◽  
Philipp Pahl ◽  
Christoph Kutschker ◽  
Stefan Malz ◽  
Ullrich R. Pfeiffer ◽  
...  
Keyword(s):  
Power Combining ◽  
On Chip

scholarly journals A Fully Integrated Compact Outphasing CMOS Power Amplifier Using a Parallel-Combining Transformer with a Tuning Inductor Method

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 257 ◽  
Author(s):  
Se-Eun Choi ◽  
Hyunjin Ahn ◽  
Joonhoi Hur ◽  
Kwan-Woo Kim ◽  
Ilku Nam ◽  
...  
Keyword(s):  
Output Power ◽  
Power Amplifier ◽  
Cmos Process ◽  
Power Combining ◽  
Fully Integrated ◽  
Term Evolution ◽  
Class D ◽  
Adjacent Channel ◽  
On Chip

This work presents a compact on-chip outphasing power amplifier with a parallel-combining transformer (PCT). A series-combining transformer (SCT) and PCT are analyzed as power-combining transformers for outphasing operations. Compared to the SCT, which is typically used for on-chip outphasing combiners, the PCT is much smaller. The outphasing operations of the transformer combiners and class-D switching PAs are also analyzed. A tuning inductor method is proposed to improve the efficiency of class-D power amplifiers (PAs) with power-combining transformers in the out-of-phase mode. The proposed PA was implemented with a standard 0.18 µm CMOS process. The measured maximum drain efficiency is 37.3% with an output power of 22.4 dBm at 1.7 GHz. A measured adjacent channel leakage ratio (ACLR) of less than −30 dBc is obtained for a long-term evolution (LTE) signal with a bandwidth of 10 MHz.

Active multiple-feed on-chip radiator with in-antenna power-combining approach

2016 ◽  
Author(s):  
Benjamin Goettel ◽  
Daniel Mueller ◽  
Heiko Gulan ◽  
Akanksha Bhutani ◽  
Thomas Zwick
Keyword(s):  
Power Combining ◽  
On Chip

On-chip power-combining techniques for watt-level linear power amplifiers in 0.18 μm CMOS

2015 ◽  
Vol 36 (9) ◽  
pp. 095002 ◽  
Author(s):  
Zhixiong Ren ◽  
Kefeng Zhang ◽  
Lanqi Liu ◽  
Cong Li ◽  
Xiaofei Chen ◽  
...  
Keyword(s):  
Power Amplifiers ◽  
Power Combining ◽  
On Chip

Gut microbiome a promising target for management of respiratory diseases

2020 ◽  
Vol 477 (14) ◽  
pp. 2679-2696
Author(s):  
Riddhi Trivedi ◽  
Kalyani Barve
Keyword(s):  
Respiratory Diseases ◽  
New Technology ◽  
Bacterial Flora ◽  
Systemic Circulation ◽  
The Body ◽  
Lung Pathology ◽  
Promising Target ◽  
Current Therapies ◽  
Intestinal Microbial Flora ◽  
On Chip

The intestinal microbial flora has risen to be one of the important etiological factors in the development of diseases like colorectal cancer, obesity, diabetes, inflammatory bowel disease, anxiety and Parkinson's. The emergence of the association between bacterial flora and lungs led to the discovery of the gut–lung axis. Dysbiosis of several species of colonic bacteria such as Firmicutes and Bacteroidetes and transfer of these bacteria from gut to lungs via lymphatic and systemic circulation are associated with several respiratory diseases such as lung cancer, asthma, tuberculosis, cystic fibrosis, etc. Current therapies for dysbiosis include use of probiotics, prebiotics and synbiotics to restore the balance between various species of beneficial bacteria. Various approaches like nanotechnology and microencapsulation have been explored to increase the permeability and viability of probiotics in the body. The need of the day is comprehensive study of mechanisms behind dysbiosis, translocation of microbiota from gut to lung through various channels and new technology for evaluating treatment to correct this dysbiosis which in turn can be used to manage various respiratory diseases. Microfluidics and organ on chip model are emerging technologies that can satisfy these needs. This review gives an overview of colonic commensals in lung pathology and novel systems that help in alleviating symptoms of lung diseases. We have also hypothesized new models to help in understanding bacterial pathways involved in the gut–lung axis as well as act as a futuristic approach in finding treatment of respiratory diseases caused by dysbiosis.

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