Resonant frequencies of open and closed loop frequency selective surface arrays

Reduction of Resonant Frequencies of Frequency Selective Surface by Introducing Different Types of Slots

In this paper, frequency Selective Property of a rectangular patch has been investigated. Study is based on patch without slot and the same patch with slot. In a fixed patch different shapes of slots have been cut and simulated results are noted. Observations are reported with different periodicities. The investigation includes a comparative study also.

A Compact Miniaturized Frequency Selective Surface with Stable Resonant Frequency

A compact miniaturized frequency selective surface (FSS) with stable resonant frequency is proposed in this letter. The proposed FSS is composed of four spiral triangles connected in the middle of the unit cell, symmetrically. Simulated results show that the dimension of the element is only 0.0558λ0 × 0.0558λ0, and reduction in FSS size is up to 97.7% with respect to conventional cross-dipole F...

Open-loop and closed-loop filters for optimal trajectory planning under time and frequency constraints

Dynamic filters for real-time trajectory generation can be designed in different ways with quite different levels of performances and complexity. However, one can observe that the configurations of such filters are based on two main schemes: systems composed of a chain of integrators with a feedback control and systems formed of a sequence of linear filters disposed in a cascade configuration. ...

Closed-Loop Operation of A tuator Arrays

Closed-Loop Operation of Actuator Arrays

An actuator array performs distributed manipulation where an object being transported and manipulated rests on a large number of stationary supporting actuators. The authors have developed a macroscopic actuator array consisting of many motorized wheels. As opposed to a MEMS array, the analysis requires the explicit modeling of the discreteness in the system, including the set of supports, dist...