Natural Science Basic Fundamental Program of Shaanxi Province(2023-JC-YB-499);Open Project of Southeast University State Key Laboratory of Millimeter Waves(K202318);Proof of Concept Foundation of Xidian University Hangzhou Institute of Technology(GNYZ2023XJ0204)
YIN Jia-yuan, WU Jian, DENG Jing-ya, et al. Slow-Wave SIW Periodic Leaky-Wave Antenna with Increased Gain and Continuous Beam Scanning Through Broadside[J]. Acta Electronica Sinica, 2025, 53(03): 782-789.
YIN Jia-yuan, WU Jian, DENG Jing-ya, et al. Slow-Wave SIW Periodic Leaky-Wave Antenna with Increased Gain and Continuous Beam Scanning Through Broadside[J]. Acta Electronica Sinica, 2025, 53(03): 782-789. DOI:10.12263/DZXB.20240447
Slow-Wave SIW Periodic Leaky-Wave Antenna with Increased Gain and Continuous Beam Scanning Through Broadside
A substrate integrated waveguide (SIW) periodic leaky-wave antenna (PLWA) with increased gain and continuous beam scanning through broadside is proposed by loading slow-wave (SW) structures. Slow wave structure in the form of periodic blind via-holes with loaded patches decelerates the phase velocity of the electromagnetic wave traveling in SIW
reducing the guided wavelength by 50%. Compared with normal SIW PLWA
the distance between the adjacent radiating slots in the proposed SW-SIW PLWA is decreased by half
allowing twice as many radiating slots in SW-SIW PLWA with the same length. Therefore
the radiation efficiency and the gain of SW-SIW PLWA can be significantly increased. Furthermore
the loaded patches of slow wave structure under the radiating slots are extended to improve the impedance match of the radiating slots and suppress the reflected wave
so the open-stopband (OSB)
which is a common drawback of the PLWA
is suppressed. In consequence
the radiation beam can scan from backward to forward direction continuously. A prototype of the proposed SW-SIW PLWA is manufactured and measured
the scanning angle of the proposed PLWA reaches 72.7° during the operating frequency range of 13.4~15.4 GHz with maximum gain of 8.47 dBi. The measured results agree well with the simulations.
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references
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