Resonant Pulse-Shaping Power Supply for Radar Transmitters

被引：20
|
作者：
Rodriguez, Miguel [1 ]
Roberg, Michael [2 ]
Zai, Andrew [1 ]
Alarcon, Eduard [3 ]
Popovic, Zoya [1 ]
Maksimovic, Dragan [1 ]
机构：
[1] Univ Colorado, Dept Elect Comp & Energy Engn, Boulder, CO 80309 USA
[2] TriQuint Semicond, Richardson, TX 75080 USA
[3] Tech Univ Catalunya UPC, Dept Elect Engn, Energy Proc Integrated Circuits EPIC Grp, E-08034 Barcelona, Spain
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2014年 / 29卷 / 02期
关键词：
Power conversion; pulsed power supplies; radar applications; radiofrequency amplifiers; RLC circuits; RF; PA;
D O I：
10.1109/TPEL.2013.2256471
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：
Typical radar transmitter signals are frequency-modulated with pulsed constant-amplitude envelopes in order to optimize radio-frequency power amplifier (RFPA) efficiency, which results in spectral broadening and power radiated outside of the radar frequency band. This problem can be alleviated by using an appropriately shaped pulse envelope, provided that high-efficiency operation of the radar transmitter is maintained. This paper introduces a pulse-shaping power supply for RFPAs in radar transmitters which enables high efficiency while reducing the spectral emissions. The pulse-shaping power supply is a simple switched resonant circuit capable of approximating a Gaussian pulse envelope waveform. Operating principles are presented and a state-plane-based design approach is described for the resonant pulse-shaping power supply, which enables improved waveform quality and efficiency. An experimental prototype with efficiency greater than 90% is used to supply a 2.14-GHz GaN RFPA. The RFPA efficiency of up to 76%, overall transmitter efficiency of up to 67%, and output signal having high spectral purity demonstrate feasibility of a high-efficiency, high-performance radar system.
引用
收藏
页码：707 / 718
页数：12
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