A Baseband Impedance Cancellation Technique for Wideband Multitransistor Amplifiers

被引：0

作者：

van den Heuvel, Indy ^{[1
]}

Azad, Ehsan M. ^{[2
]}

Omisakin-Edwards, Mark

Cripps, Steve C. ^{[1
]}

Tasker, Paul J. ^{[1
]}

Quaglia, Roberto ^{[1
]}

机构：

[1] Cardiff Univ, Ctr High Frequency Engn, Cardiff CF24 3AA, Wales

[2] IMPERIAL Pk Innovat Ctr, IMPERIAL Pk Innovat Ctr, Newport NP10 8BE, Wales

来源：

IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS | 2024年 / 34卷 / 06期

关键词：

Concurrent wideband operation; Doherty; gallium nitride; linearity; power amplifiers (PAs); wideband signals; DESIGN;

D O I：

10.1109/LMWT.2024.3390594

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A new baseband (BB) impedance cancellation technique is presented for broadband multitransistor amplifier designs. By placing a BB transformer in between the Doherty main and auxiliary amplifier, the BB component of a two-tone signal can be canceled out, resulting in improved efficiency, output power, and linearity over two-tone bandwidth. A 20-W, 6-dB back-off 3.5-GHz Doherty is designed and its performance is measured with and without this cancellation technique. The prototype shows significant improvements for all metrics for tone spacing above 130 MHz when the transformer is used, and it has an efficiency enhancement up to 15% points at 300-MHz tone spacing.

引用

页码：777 / 780

页数：4

共 50 条

[1] A novel topology with controllable wideband baseband impedance for power amplifiers
Yao, Yao
Dai, Zhijiang
Li, Mingyu
[J]. FRONTIERS OF INFORMATION TECHNOLOGY & ELECTRONIC ENGINEERING, 2024, 25 (02) : 308 - 315
[2] Impact of the Input Baseband Impedance on the Instantaneous Bandwidth of Wideband Power Amplifiers
Barros, Diogo R.
Nunes, Luis C.
Cabral, Pedro M.
Pedro, Jose C.
[J]. 2019 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM (IMS), 2019, : 1171 - 1174
[3] Removing the effects of baseband impedance on distortion in FET amplifiers
Richards, A.
Morris, K. A.
McGeehan, J. P.
[J]. IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION, 2006, 153 (05) : 401 - 406
[4] Complex baseband predistorters for nonlinear wideband RF power amplifiers
Singerl, Peter
Agrawal, Aditya
Garg, Aditya
Neelabh
Kubin, Gernot
Eul, Hermann
[J]. IEEE MWSCAS'06: PROCEEDINGS OF THE 2006 49TH MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOL II, 2006, : 675 - +
[5] A bootstrap technique for wideband amplifiers
Centurelli, F
Luzzi, R
Olivieri, M
Trifiletti, A
[J]. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-FUNDAMENTAL THEORY AND APPLICATIONS, 2002, 49 (10): : 1474 - 1480
[6] Digital Baseband Predistortion of Wideband Power Amplifiers with Improved Memory Effects
Bondar, D.
Budimir, D.
[J]. RWS: 2009 IEEE RADIO AND WIRELESS SYMPOSIUM, 2009, : 275 - 278
[7] Chebyshev approximation of baseband Volterra series for wideband RF power amplifiers
Singerl, P
Kubin, G
[J]. 2005 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS), VOLS 1-6, CONFERENCE PROCEEDINGS, 2005, : 2655 - 2658
[8] A Novel Technique for Wideband Bipolar Amplifiers
Ghasemzadeh, Mehdi
Akbari, Amin
Mousazadeh, Morteza
Hadidi, Khayrollah
Khoei, Abdollah
[J]. 2013 21ST IRANIAN CONFERENCE ON ELECTRICAL ENGINEERING (ICEE), 2013,
[9] Baseband Fusion Technique for Filter-Less Wideband Transmitters
Tripathi, Girish Chandra
Rawat, Meenakshi
[J]. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2021, 68 (08) : 3508 - 3519
[10] Input Offset Cancellation Trimming Technique for Operational Amplifiers
Mohamed, Ahmed Reda
Ibrahim, Mohamed F.
Farag, Fathi
[J]. 2013 SAUDI INTERNATIONAL ELECTRONICS, COMMUNICATIONS AND PHOTONICS CONFERENCE (SIECPC), 2013,

← 1 2 3 4 5 →