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This letter presents a new broadband circularly polarized (CP) planar monopole antenna with a simple structure and compact size. Broadband CP operation is achieved by vertically extending one side of the ground plane, while a cross-shaped monopole structure and the presence of a slot in the groun...
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This article presents the design of a compact circularly polarized square slot antenna fed by a G‐shaped strip feedline. The 3 dB axial ratio (AR) band can be achieved by modifying the feedline by simply extending it with an L‐shaped monopole and an inverted C‐shaped monopole. In simple terms,...
Read MoreFor the sensitive high-resolution force- and field-sensing applications, the large-mass microelectromechanical system (MEMS) and optomechanical cavity have been proposed to realize the sub-aN/Hz1/2 resolution levels. In view of the optomechanical cavity-based force- and field-sensors, the optomec...
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This paper presents a wideband and high gain circularly polarized ultra-high- frequency (UHF) radio frequency identification (RFID) reader microstrip antenna and array. Such antenna unit is composed of one main radiation patch and one parasitic radiation patch with air as the dielectric spacer. T...
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We demonstrate the controllable optomechanical coupling and Drude self-pulsation plasma locking in chip-scale optomechanical cavities. The optomechanical coupling between the optical and mechanical degrees-of-freedom is dependent on the intracavity energy via the coupled fiber position. With the ...
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