A Compact, High-Gain, High-Power, Ultrawideband Microwave Pulse Compressor Using Time-Reversal Techniques
| Autor: | Victor M. Mendez, Zachary B. Drikas, Sanjay Raman, Bisrat D. Addissie |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Waveguide (electromagnetism) Radiation 020206 networking & telecommunications 02 engineering and technology Condensed Matter Physics law.invention Power (physics) Pulse (physics) RF switch law Pulse compression 0202 electrical engineering electronic engineering information engineering Electronic engineering Electrical and Electronic Engineering Radar Impulse response Microwave |
| Zdroj: | IEEE Transactions on Microwave Theory and Techniques. 68:3355-3367 |
| ISSN: | 1557-9670 0018-9480 |
| DOI: | 10.1109/tmtt.2020.3003037 |
| Popis: | Generation of high-peak-power, microwave ultrashort pulses (USPs) is desirable for ultrawideband communications and radar/remote sensing. A variety of microwave USP generators exist today, or are described in the literature, and have benefits and limitations depending on the application. A new class of pulse compressors for generating USPs using electromagnetic time-reversal (TR) techniques has been developed in the last decade and is the topic of this article. This article presents a compact TR microwave pulse-compression cavity that has ultrawide bandwidth (BW) (5–18 GHz) and employs waveguide feeds for high-peak-power output over the entire band. The system uses a time-reversal-based pulse compression scheme with one-bit processing (OBTR) to achieve high-peak power. We present results from full-wave simulations and measurements showing compression gain exceeding 21.2 dB, 22% efficiency, and measured instantaneous peak output powers reaching 39.2 kW. These are all record results for this type of pulse compressor. In addition, we present a new analysis of variation in compression gain due to impulse response recording time and BW variation, new experimental work on the effect of mode stirrer position on compression gain, and a novel RF switch-based technique for reducing time-sidelobes while using OBTR. |
| Databáze: | OpenAIRE |
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