scholarly journals Digitally-Compensated Wideband 60 GHz Test-Bed for Power Amplifier Predistortion Experiments

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1473
Author(s):  
Martin Pospíšil ◽  
Roman Maršálek ◽  
Tomáš Götthans ◽  
Tomáš Urbanec

Millimeter waves will play an important role in communication systems in the near future. On the one hand, the bandwidths available at millimeter-wave frequencies allow for elevated data rates, but on the other hand, the wide bandwidth accentuates the effects of wireless front-end impairments on transmitted waveforms and makes their compensation more difficult. Research into front-end impairment compensation in millimeter-wave frequency bands is currently being carried out, mainly using expensive laboratory setups consisting of universal signal generators, spectral analyzers and high-speed oscilloscopes. This paper presents a detailed description of an in-house built MATLAB-controlled 60 GHz measurement test-bed developed using relatively inexpensive hardware components that are available on the market and equipped with digital compensation for the most critical front-end impairments, including the digital predistortion of the power amplifier. It also demonstrates the potential of digital predistortion linearization on two distinct 60 GHz power amplifiers: one integrated in a direct-conversion transceiver and an external one with 24 dBm output power.

2016 ◽  
Vol 78 (4-3) ◽  
Author(s):  
Sana Ullah ◽  
Sadiq Ullah ◽  
Shahbaz Khan

In this paper an inset feed 60 GHz millimeter wave microstrip patch antenna is proposed for future high speed wireless communication systems. The performance of a conventional 60 GHz patch antenna compared with metamaterial-based 60 GHz antennas. The later employs three types (mushroom, cross and hexagonal) of Electromagnetic Bandgap (EBG) surfaces as a ground planes. The millimeter wave antenna employing the cross-shaped EBG give improved gain as compared to the rest of the antenna models. The 60 GHz antenna based on the mushroom type EBG present better efficiency due to the surface suppression by the ground plane. The proposed antennas can be used in future high speed wireless applications. Due to the very small size these antennas are suitable for medical implants operating in the unlicensed millimeter wave band.


IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 40454-40462 ◽  
Author(s):  
Chong Zhang ◽  
Gongpu Wang ◽  
Minzheng Jia ◽  
Ruisi He ◽  
Li Zhou ◽  
...  

Author(s):  
Morteza Abbasi ◽  
Torgil Kjellberg ◽  
Anton de Graauw ◽  
Edwin van der Heijden ◽  
Raf Roovers ◽  
...  

2013 ◽  
Vol 347-350 ◽  
pp. 102-106
Author(s):  
Shu Sheng Peng ◽  
Feng Xu ◽  
Li Wu ◽  
Jian Zhong Xu

This paper is focused on a millimeter-wave detector system that works at self-heterodyne mode. The detector antenna and MMW front-end are integrated and a weak heterodyne signal is amplified with a low-noise amplifier. After high-speed sampled with a high-speed A/D, digital signal are processed in a FPGA. Some experiment results are shown finally.


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