Analysis and design of a 200W LDMOS based doherty amplifier for 3G base stations

2004 ◽  
Author(s):  
J.R. Gajadharsing ◽  
O. Bosma ◽  
P. van Westen
Keyword(s):  
Base Stations ◽  
Analysis And Design ◽  
Doherty Amplifier

scholarly journals Wideband and UWB Antennas for Wireless Applications: A Comprehensive Review

2017 ◽  
Vol 2017 ◽  
pp. 1-45 ◽  
Author(s):  
Renato Cicchetti ◽  
Emanuela Miozzi ◽  
Orlandino Testa
Keyword(s):  
Communication Systems ◽  
Base Stations ◽  
Portable Devices ◽  
Comprehensive Review ◽  
Dielectric Resonator Antennas ◽  
Analysis And Design ◽  
Wireless Applications ◽  
Uwb Antennas ◽  
Time Domain Response ◽  
Manufacturing Technologies

A comprehensive review concerning the geometry, the manufacturing technologies, the materials, and the numerical techniques, adopted for the analysis and design of wideband and ultrawideband (UWB) antennas for wireless applications, is presented. Planar, printed, dielectric, and wearable antennas, achievable on laminate (rigid and flexible), and textile dielectric substrates are taken into account. The performances of small, low-profile, and dielectric resonator antennas are illustrated paying particular attention to the application areas concerning portable devices (mobile phones, tablets, glasses, laptops, wearable computers, etc.) and radio base stations. This information provides a guidance to the selection of the different antenna geometries in terms of bandwidth, gain, field polarization, time-domain response, dimensions, and materials useful for their realization and integration in modern communication systems.

High Power Uneven GaN Doherty Amplifier for UMTS Radio Base Stations

2013 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Khaled Bathich ◽  
Ahmed Sayed ◽  
Georg Boeck
Keyword(s):  
High Power ◽  
Base Stations ◽  
Doherty Amplifier

scholarly journals Design and analysis of 80-W wideband asymmetrical Doherty amplifier

2014 ◽  
Vol 7 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Khaled Bathich ◽  
Georg Boeck
Keyword(s):  
Output Power ◽  
Performance Enhancement ◽  
Limiting Factors ◽  
Average Output ◽  
Analysis And Design ◽  
Power Added Efficiency ◽  
Single Carrier ◽  
Amplifier Design ◽  
Flat Back ◽  
Doherty Amplifier

This paper presents the analysis and design of a wideband asymmetrical Doherty amplifier. The frequency response of the output combining network of the Doherty amplifier with arbitrary back-off level configuration is analyzed. Other bandwidth-limiting factors were discussed and analyzed as well. A number of performance enhancement techniques were taken into consideration to obtain high and flat back-off efficiency over the amplifier design band of 1.7–2.25 GHz. The designed Doherty amplifier had, at 8.0–9.9 dB output back-off, a minimum efficiency of η = 50% [power-added efficiency of 45%], measured near 40 dBm of output power, and over 28% bandwidth. Using digital predistortion (DPD) linearization, an adjacent-channel leakage ratio (ACLR) of −43 dBc was obtained for a single-carrier W-CDMA signal, at 40.9 dBm and 46% of average output power and drain efficiency, respectively. The designed amplifier represents the first wideband Doherty amplifier reported over extended power back-off range.

A 33W GaN HEMT Doherty amplifier with 55% drain efficiency for 2.6GHz base stations

2009 ◽  
Author(s):  
Hiroaki Deguchi ◽  
Norihiko Ui ◽  
Kaname Ebihara ◽  
Kazutaka Inoue ◽  
Norihiro Yoshimura ◽  
...  
Keyword(s):  
Base Stations ◽  
Gan Hemt ◽  
Doherty Amplifier
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