Challenges of Millimeter-Wave Active Antenna Systems in 5G

Author(s):  
U. Gustavsson ◽  
M. Johansson ◽  
F. Athley ◽  
A. Zaidi
2021 ◽  
pp. 1-1
Author(s):  
Rui Sun ◽  
Weidong Wang ◽  
Li Chen ◽  
Guo Wei ◽  
Wenyi Zhang

2013 ◽  
Vol 5 (3) ◽  
pp. 329-334 ◽  
Author(s):  
Udo Karthaus ◽  
Stephan Ahles ◽  
Ahmed Elmaghraby ◽  
Horst Wagner

This paper presents a radio frequency (RF) continuous-time band-pass delta sigma modulator (CT BP DSM) receiver realized in a 180 nm SiGe BiCMOS technology. It also provides an introduction to active antenna systems (AAS) for cellular infrastructure base stations, which is the target application for this RF integrated circuit (IC). The internal quantizer and feedback digital to analog converter (DAC) resolution of the CT BP DSM is 2 bit. Without applying DAC linearization techniques such as trimming or dynamic element matching being utilized, measured performance parameters include an SNR and SNDR in 35 MHz bandwidth of 56.7 and 53.7 dB, respectively. IIP3 and noise figure are −6.6 dBm and 10 dB, respectively. No image reception is noticeable within a measurement dynamic range of 83 dB. When driven by single-carrier and three-carrier W-CDMA signals, adjacent channel leakage ratio (ACLR) is −62.6 and −52.1 dB, respectively, making the design also suitable as a modulator for a class-S power amplifier.


Author(s):  
Vojislav Milosevic ◽  
Branka Jokanovic ◽  
Olga Boric-Lubecke ◽  
Victor M. Lubecke

This chapter presents an overview on the drivers behind the 5G evolution and explains technological breakthroughs in the microwave and millimeter wave domain that will create the 5G backbone. Extensions to millimeter wave frequency bands, advanced multi-antenna systems and antenna beamforming and simultaneous transmission and reception are some of the prospects that could lead to both architectural and component disruptive design changes in the future 5G. 5G is expected to include an innovative set of technologies that will radically change our private and professional lives, though applications of novel services, such as remote healthcare, driverless cars, wireless robots and connected homes, which will alter boundaries between the real and the cyber world.


2018 ◽  
Vol 56 (7) ◽  
pp. 14-20 ◽  
Author(s):  
Eva Rajo-Iglesias ◽  
Miguel Ferrando-Rocher ◽  
Ashraf Uz Zaman

Sign in / Sign up

Export Citation Format

Share Document