Temporal Focusing Effects of Time-Reversal Frequency Diverse Array Antenna

被引：6

作者：

Cheng, Jie ^{[1
]}

Wang, Wen-Qin ^{[1
]}

Chen, Hui ^{[1
]}

Ji, Shilong ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Informat & Commun Engn, Chengdu 611731, Sichuan, Peoples R China

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2019年 / 18卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Array beampattern; channel modeling; frequency diverse array (FDA); temporal focusing; time-reversal communication; RADAR;

D O I：

10.1109/LAWP.2019.2931457

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：

Omnidirectional or the phased-array antenna is usually adopted in the time-reversal literature, but it cannot focus the power of the transmitted signals in both time- and space-domains. In this letter, we propose the hybridization of time reversal and frequency diverse array (FDA), which transmits the signal with a small frequency offset across the array to generate both angle- and range-dependent beampattern, for temporal focusing. The time-reversal FDA channel is modeled in multipath scenarios. For the given parameters with 12 transmit elements spaced by half-wavelength, carrier frequency 1 GHz, and frequency offset 1 kHz, the peak of time-reversal FDA focusing is 18.7% higher than that of a standard FDA. Both theoretic analysis and simulation results verify that, while maintaining FDA angular-time periodicity, the FDA range periodicity is eliminated and the energy is focused at the target position by the use of time-reversal processing.

引用

页码：1858 / 1862

页数：5