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A unit cell composed of a microstrip ring and a slot on the ground plane is presented. The phase response range of the unit cell at 18 GHz is over 440° with a smooth phase variation. A Ku band reflectarray is designed and measured at 18 GHz to verify its performance. The maximum gain and half-power beam width is 31.7 dB and 4.7°, respectively. The reflectarray gives a high gain despite of some leakage...
This paper presents a reflectarray configuration which supports the operation of six frequency bands. The proposed reflectarray has two substrate layers and each layer accommodates array elements of three frequency bands. Reflection phase curves of the array elements of different frequency bands are simulated. Interactions among elements are also explored.
This paper presents a new configuration for dual-band linearly polarized reflectarray. Simulated phase responses are given in the paper. The radiating elements at two frequency bands are printed at the same layer. No physical contacts between elements will occur as the sizes of the elements are changing. Top layer blocking effects of the dual-layer configuration are also eliminated. The proposed configuration...
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