Balanced Power Amplifier Protection Against Load Mismatch

被引：8
作者：
Sinha, Shruti [1 ]
Rao, Ch. V. N. [1 ]
Pujara, Dhaval [2 ]
机构：
[1] Indian Space Res Org, Space Applicat Ctr, Ahmadabad 380015, Gujarat, India
[2] Nirma Univ, Elect & Commun Engn Dept, Ahmadabad 382481, Gujarat, India
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2018年 / 28卷 / 02期
关键词：
Balanced power amplifier (PA); load mismatch; protection;
D O I：
10.1109/LMWC.2018.2792692
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：
This letter presents a new approach for balanced power amplifier protection against load mismatch under pulsed-RF operation. The proposed protection mechanism completely eliminates the reflected power under severe mismatch conditions while not affecting nominal operating condition. The concept is based on detection, comparison, and switching technique. The proposed protection circuit offers full protection against open and short at the output. This protection mechanism has been demonstrated on a 10-W X-band power amplifier, intended to be used in space borne radar payloads. The reaction time of the proposed protection mechanism is < 100 ns.
引用
收藏
页码：165 / 167
页数：3
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