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A wideband and continuous beam steering flat antenna is proposed in the 60-GHz band. The antenna consists of two layers and is made of two parts: 1) a feeding network and 2) a slotted plate. The relative rotation movement between the two antenna parts generates a phase gradient across the radiating part, and a continuous beam is generated in the upper hemisphere. The mechanical movement between the...
A novel array-antenna is proposed, where antenna element and photodiode as well as optical fiber for RF power feeding are integrated. 4×2 60GHz arrayed patch antenna is actually fabricated and it is experimentally demonstrated that the two dimensional antenna beam steering is achieved by tuning the wavelength of the optical signal.
We demonstrate digital signal transmission in RoF system with antenna beam steering capability. Beam steering operation for 40-GHz array-antenna has been experimentally confirmed by quantitatively analyzing the relationship between wavelength tuning range and signal quality.
A beam steering scheme of photonic array-antennas for 60 GHz RF signals generated by optical two-tone technique is reported. It is experimentally demonstrated that 60 GHz antenna beam can be remotely steered by tuning wavelengths.
In order to keep up with the explosive mobile traffic increase, many wireless access points in a millimeter-wave band will be deployed in the future. A beam steering of an array antenna is effective for avoiding interference among plural access points, and a 2-dimensional (2-D) array operation is required for more flexible beam control. The Radio over Fiber (RoF) is one of the promising solutions...
We demonstrated beam steering of array-antenna in millimeter-wave band at 39 GHz by WDM Radio over Fiber. The proposed photonic antenna can realize future ultra-broadband and smart antenna systems by a novel photonic approach.
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