scholarly journals Study of CMOS power amplifier design techniques for ka-band applications

2019 ◽  
Vol 13 (2) ◽  
pp. 808
Author(s):  
A.F Hasan ◽  
S.A. Z Murad ◽  
K.N Abdul Rani ◽  
F.A. Bakar ◽  
T.Z.A Zulkifli
Keyword(s):  
Group Delay ◽  
High Efficiency ◽  
High Gain ◽  
Performance Criteria ◽  
Low Power Consumption ◽  
Ka Band ◽  
Input And Output ◽  
Matching Efficiency ◽  
Recent Developments ◽  
Amplifier Design

<span>This paper reviews of high efficiency CMOS power amplifiers (PAs) in millimeter (mm) wave Ka - Band applications. The study is focused on the challenges in designing PA especially in GHz frequencies inclusive of high gain, good input and output matching, efficiency, linearity, low group delay and low power consumption. Several works on CMOS PA from year 2009 to 2018 are discussed in this paper. Recent developments of CMOS PAs are examined and a comparison of the performance criteria of various techniques is presented.</span>

scholarly journals Ka-Band Lightweight High-Efficiency Wideband 3D Printed Reflector Antenna

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Yu Zhai ◽  
Ding Xu ◽  
Yan Zhang
Keyword(s):  
High Efficiency ◽  
Near Field ◽  
Side Lobe ◽  
High Gain ◽  
Reflector Antenna ◽  
Field Analysis ◽  
Side Lobe Level ◽  
Ka Band ◽  
3D Printed ◽  
Reflecting Surface

This paper presents a lightweight, cost-efficient, wideband, and high-gain 3D printed parabolic reflector antenna in the Ka-band. A 10 λ reflector is printed with polylactic acid- (PLA-) based material that is a biodegradable type of plastic, preferred in 3D printing. The reflecting surface is made up of multiple stacked layers of copper tape, thick enough to function as a reflecting surface (which is found 4 mm). A conical horn is used for the incident field. A center-fed method has been used to converge the energy in the broadside direction. The proposed antenna results measured a gain of 27.8 dBi, a side lobe level (SLL) of −22 dB, and a maximum of 61.2% aperture efficiency (at 30 GHz). A near-field analysis in terms of amplitude and phase has also been presented which authenticates the accurate spherical to planar wavefront transformation in the scattered field.

ISM 2.45 GHz band high-efficient 15 W GaN HEMT power amplifier: design validation

2019 ◽  
Vol 11 (7) ◽  
pp. 546-553 ◽  
Author(s):  
Marcin Góralczyk ◽  
Wojciech Wojtasiak
Keyword(s):  
Output Power ◽  
Power Amplifier ◽  
High Efficiency ◽  
Power Level ◽  
High Gain ◽  
Output Power Level ◽  
Tuning Method ◽  
Gan Hemt ◽  
High Efficient ◽  
Amplifier Design

AbstractThis paper describes the development of a power amplifier operating over a 2.4–2.5 GHz frequency range with the output power level more than 15 W and 60% PAE. The transistor applied was the 10 W (13 W Psat) power GaN HEMT (CGH40010F from Wolfspeed) recommended up to 6 GHz. A harmonic tuning method was used to achieve even 30% more output power than the CGH40010 transistor was specified to deliver while maintaining high gain and high efficiency. Furthermore, an accuracy analysis of amplifier design was also conducted. It included validation and correction of the available transistor models as well as validation of the models of microstrip circuits implemented in ADS. Finally, it was concluded that both the mentioned sources of errors contributed at a similar level.

A wideband Ka-band receiver with high gain flatness and slight group delay fluctuation

2015 ◽  
Author(s):  
Gang Liu ◽  
Lei Tan ◽  
Jinping Xu ◽  
Wenbo Wang ◽  
Zhiqiang Liu ◽  
...  
Keyword(s):  
Group Delay ◽  
High Gain ◽  
Ka Band

scholarly journals Recent Developments on Five-Component Reactions

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1986
Author(s):  
Xiaoming Ma ◽  
Sanjun Zhi ◽  
Wei Zhang
Keyword(s):  
Multicomponent Reactions ◽  
High Efficiency ◽  
Review Article ◽  
Reaction Centers ◽  
Synthetic Approach ◽  
Recent Developments

Multicomponent reactions (MCRs) have inherent advantages in pot, atom, and step economy (PASE). This important green synthetic approach has gained increasing attention due to high efficiency, minimal waste, saving resources, and straightforward procedures. Presented in this review article are the recent development on 5-compoment reactions (5CRs) of the following six types: (I) five different molecules A + B + C + D + E; pseudo-5CRs including (II) 2A + B + C + D, (III) 2A + 2B + C, (IV) 3A + B + C, (V) 3A + 2B, and (VI) 4A + B. 5CRs with more than five-reaction centers are also included.

scholarly journals The Ka-band high power klystron amplifier design program of INFN

Vacuum ◽  
2021 ◽  
pp. 110377
Author(s):  
M. Behtouei ◽  
B. Spataro ◽  
F. Di Paolo ◽  
A. Leggieri
Keyword(s):  
High Power ◽  
Ka Band ◽  
Design Program ◽  
Amplifier Design
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