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Stepped Waveform Time-Modulated Multibeam Array With Beam Suppression Functionality

delete2024-09-01
delete0
PRE
AI
Q
Qiaoyu Chen
J
Jindong Zhang
M
Mingxuan Cai
D
Deng-Yue Luo
W
Wen Wu *
D
Da‐Gang Fang
DOI：10.1109/LAWP.2024.3402819delete
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Abstract

Abstract

En 中文
Time-modulated array (TMA) naturally generates a large number of sidebands to achieve multibeam radiation. Conventional multibeam TMAs using rectangular modulation signals lack design flexibility, and recent high-flexibility designs are mostly theoretical without experimental validation. To balance flexibility and feasibility, this letter proposes a stepped waveform multibeam TMA with beam suppression functionality. It uses in-phase/quadrature (I/Q) time modulators with digital attenuators and 0/pi phase shifters to independently generate stepped waveforms in both in-phase and quadrature channels. These waveforms can fit various complex modulation signals, enabling the realization of diverse multibeam radiations and the suppression of specific beams. Experimental verification is conducted on the same TMA hardware system, achieving a 5-beam TMA and a 4-beam TMA by adjusting the time-modulated signals. The suppressed beams achieve a suppression level of up to -36 dB, making it effective for anti-interference.
Keywords:
Amplitude modulation
Attenuators
Hardware
Field programmable gate arrays
Interference
Phase modulation
Frequency modulation
Anti-interference
beam suppression
in-phase/quadrature (I/Q) modulation
multibeam antenna
time-modulated array (TMA)

Journal

IEEE Antennas and Wireless Propagation Letters cover
IEEE Antennas and Wireless Propagation Letters
IF:
4.8
Papers:
1.0W
Citations:
2.8W

Organization

No organization information available