scholarly journals 28 GHz Single-Chip Transmit RF Front-End MMIC for Multichannel 5G Wireless Communications

Symmetry ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1167
Author(s):  
Evgeny Erofeev ◽  
Vadim Arykov ◽  
Michael Stepanenko ◽  
Aleksei Voevodin ◽  
Aleksei Kogai ◽  
...  
Keyword(s):  
Wireless Networks ◽  
Integrated Circuits ◽  
Millimeter Wave ◽  
Communication Systems ◽  
Phase Shifter ◽  
Single Chip ◽  
Power Added Efficiency ◽  
Front End ◽  
Rf Front End ◽  
Digital Phase Shifter

Millimeter-wave wireless networks of the new fifth generation (5G) have become a primary focus in the development of the information and telecommunication industries. It is expected that 5G wireless networks will increase the data rates and reduce network latencies by an order of magnitude, which will create new telecommunication services for all sectors of the economy. New electronic components such as 28 GHz (27.5 to 28.35 GHz) single-chip transmit radio frequency (RF) front-end monolithic microwave integrated circuits (MMICs) will be required for the performance and power consumption of millimeter-wave (mm-wave) 5G communication systems. This component includes a 6-bit digital phase shifter, a driver amplifier and a power amplifier. The output power P3dB and power-added efficiency (PAE) are 29 dBm and 19.2% at 28 GHz. The phase shifter root-mean-square (RMS) phase and gain errors are 3° and 0.6 dB at 28 GHz. The chip dimensions are 4.35 × 4.40 mm.

A Single-Chip Multi-Mode RF Front-End Circuit and Module for W-CDMA, PCS, and GPS Applications

2006 ◽  
Author(s):  
Huijung Kim ◽  
Changjoon Park ◽  
Sanghyeok Choi ◽  
Seonghan Ryu ◽  
Jongryul Lee ◽  
...  
Keyword(s):  
Single Chip ◽  
Front End ◽  
Rf Front End ◽  
Multi Mode

Ultra-low Residue Flux Applications in RF Front-End Packages

2020 ◽  
Vol 2020 (1) ◽  
pp. 000125-000130
Author(s):  
Leo Hu ◽  
Sze Pei Lim
Keyword(s):  
Integrated Circuits ◽  
Flip Chip ◽  
Low Noise ◽  
Low Noise Amplifiers ◽  
Reflow Process ◽  
Reliability Study ◽  
Rf Switches ◽  
Front End ◽  
Rf Front End ◽  
Package Reliability

Abstract With the leap into the 5G era, the demand for improvements in the performance of mobile phones is on the rise. This is also true for the quantity of radio frequency (RF) front-end integrated circuits (ICs), especially for RF switches and low noise amplifiers (LNA). It is well-known that improvements in performance depend on the combination of new design, package technology, and choice of materials. Ultra-low residue (ULR) flux is an innovative, truly no-clean, flip-chip bonding material. By using ULR flux, the typical water-wash cleaning process can be removed and, in some instances, package reliability can be improved as well. This simplified assembly process will help to reduce total packaging costs. This paper will discuss the application of ULR fluxes on land grid arrays (LGAs) and quad-flat no-leads/dual-flat no-leads (QFN/DFN) packages for RF front-end ICs, as well as the reflow process. The solder joint strength and reliability study will be shared as well.

scholarly journals A Novel Dual-Polarization Total Power Radiometer with Single Channel

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Yiming Niu ◽  
Can Cui ◽  
Guo Yang ◽  
Wen Wu
Keyword(s):  
Millimeter Wave ◽  
Single Channel ◽  
Total Power ◽  
Dual Polarization ◽  
Front End ◽  
Rf Front End ◽  
False Target

A dual-polarization total power millimeter wave (MMW) radiometer with single channel was proposed in this paper. It completed the subtraction of two orthogonally polarized signals in the RF front end. The system used one channel to achieve the function of two channels. On the basis of discussing the theory and the configuration of the system, the performance of the system and the ability to identify the false target were analyzed and simulated. The results showed the radiometer could solve the problem that the performance of dual-polarization radiometer becomes weak because of gain inconformity with two channels. The system was cheap and small and could identify the false target which has different apparent temperatures at vertical- and horizontal-polarized radiations.

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