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A compact and low-loss MEMS-based phase shifter is proposed for microwave/millimetre-wave phased array antenna systems. The proposed phase shifter is an alumina-based CPW line, loaded with a variable series capacitor. The phase shifter uses an electromagnetic MEMS actuator to change the capacitor value. A simple three-mask surface micromachining process has been developed for device fabrication. The...
This paper presents a new dielectric grating antenna based on high resistivity silicon image guide technology. The radiation is due to triangular shaped (sawtooth) dielectric gratings on the both sides of the image guide. The proposed antenna has been fabricated with a low cost single mask deep reactive-ion-etching process. The proposed optimized antenna is well-matched over the W band with radiation...
A new dielectric grating antenna is proposed in this paper. The proposed all-silicon antenna consists of a rectangular dielectric waveguide with rectangular gratings on its both sides. This type of grating can be fabricated with low cost single print deep reactive-ion-etching process. The radiation mechanism in the proposed structure, is based on the power leakage of the order −1 space harmonic (Floquet's...
This paper presents a new method for designing planar millimeter-wave antennas with optimal shape. The method is applied to dielectric antennas for high efficiency. The method simply pixelates the available space for the antenna into small boxes and then a finite-elements solver integrated with an optimization engine is used to find the pixels pattern in this finite space which satisfies the required...
Three new Particle Swarm Optimization approaches are proposed. We used these approaches to solve a Curve fitting problem for Parasitic Extraction Macro-modeling application. In the first proposed approach, Wiggling PSO (WPSO); we enforce the particles to vibrate in their motion towards the best position -instead of straight motion- to enlarge the scanning area. The second approach, Incrementally Social...
Three new Genetic Algorithm (GA) are proposed and used to solve a Curve fitting problem for Parasitic Extraction Macro-modeling application. The first proposed approach, Diagonal GA (DGA); is based on replacing the traditional random population initialization method with a deterministic diagonal-like one. The second proposed approach, Elite Condensation GA (ECGA); is based on fine tuning the GA by...
Three new Genetic Algorithm (GA) approaches and four new Particle Swarm Optimization (PSO) approaches are proposed and used to solve a Curve fitting problem for Parasitic Extraction Macro-modeling application. For GA, the first proposed approach, Diagonal GA (DGA); is based on replacing the traditional random population initialization method with a deterministic diagonal-like one. The second proposed...
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