A planar multi-beam array with a co-planar Rotman lens beamformer is introduced for wireless applications. The array consists of 8 linear series-fed subarrays with proximity-coupled patch elements. The Rotman lens feeds the subarrays through coupling slots. To reduce beam squinting, the subarrays are fed from the center. The coupling slot feeds each arm of a subarray 180° out of phase. To compensate out-of phase feeding, two feeding arms of each subarray are designed in the opposite direction. Also, cross-polar radiation is reduced significantly. In order to reduce the size of radiating patches to fit within array cell size, they are formed by four sub-patches with indentions and are fed by microstrip line from feed layer with two matching sections to improve the bandwidth. Measured results of the array structure in terms of the S-parameter of beam ports and radiation patterns are presented.
Shokouhi, F., Firouzeh, Z. (2020). Planar Multibeam Array Antenna with Rotman Lens Beamformer for 5GHz Band Wireless Applications. Journal of Communication Engineering, 9(2), 258-270. doi: 10.22070/jce.2021.14278.1184
MLA
Farid Shokouhi; Zaker Hossein Firouzeh. "Planar Multibeam Array Antenna with Rotman Lens Beamformer for 5GHz Band Wireless Applications". Journal of Communication Engineering, 9, 2, 2020, 258-270. doi: 10.22070/jce.2021.14278.1184
HARVARD
Shokouhi, F., Firouzeh, Z. (2020). 'Planar Multibeam Array Antenna with Rotman Lens Beamformer for 5GHz Band Wireless Applications', Journal of Communication Engineering, 9(2), pp. 258-270. doi: 10.22070/jce.2021.14278.1184
VANCOUVER
Shokouhi, F., Firouzeh, Z. Planar Multibeam Array Antenna with Rotman Lens Beamformer for 5GHz Band Wireless Applications. Journal of Communication Engineering, 2020; 9(2): 258-270. doi: 10.22070/jce.2021.14278.1184