Frontiers of Information Technology & Electronic Engineering
>> 2023,
Volume 24,
Issue 4
doi:
10.1631/FITEE.2200473
An array of two periodic leaky-wave antennas with sum and difference beam scanning for application in target detection and tracking
Affiliation(s): School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems, Sun Yat-sen University, Guangzhou 510006, China; less
Received: 2022-10-16
Accepted: 2023-05-06
Available online: 2023-05-06
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Abstract
An array of two periodic leaky-wave s (LWAs) with scanning is proposed for application in . The array is composed of two periodic LWAs with different periods, in which each LWA generates a narrow beam through the =-1 space harmonic. Due to the two different periods for the two LWAs, two beams with two different directions can be realized, which can be combined into a sum beam when the array is fed in phase or into a difference beam when the array is fed 180° out of phase. The array integrated with 180° hybrid is designed, fabricated, and measured. Measurement results show that the sum beam can reach a gain up to 15.9 dBi and scan from -33.4° to 20.8°. In the scanning range, the direction of the null in the difference beam is consistent with the direction of the sum beam, with the lowest null depth of -40.8 dB. With the excellent performance, the provides an alternative solution with low complexity and low cost for .
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