Based on the electric rotating magnetoresistance method, the shape anisotropy of a Co microstrip has been systematically investigated. We find that the shape anisotropy is dependent not only on the shape itself, but also on the magnetization distribution controlled by an applied magnetic field. Together with micro-magnetic simulations, we present a visualized picture of how non-uniform magnetiz...

This study discusses the design and manufacture of microstrip antennas that aim to widen bandwidth in application Wi-Fi form a hexagonal patch composed 2x4 element array. Microstrip have weakness, namely narrow bandwidth, therefore modification is needed using DGS (Defected Ground Structure) method dumbbell circle head. The allocation working frequency often used community 2.4 GHz accordance wi...

An artificial neural network (ANN) and affinity propagation (AP) algorithm based user categorization technique is presented. The proposed algorithm is designed for closed access femtocell network. ANN is used for user classification process and AP algorithm is used to optimize the ANN training process. AP selects the best possible training samples for faster ANN training cycle. The users are di...

In this study, a mechanical movable device is used to achieve tuning phase shifter with adjustable substrate, which has huge potentiality of range. The main body microstrip structure. substrate two layers one layer. By moving the layer, equivalent relative permittivity component changed and tunability realized. -128.2° 96.1° at 6GHz while transmission coefficient S21 from -2.09dB -2.70dB throug...

Microstrip patch antennas are well known for their advantages in terms of small weight, low profile and ease of manufacture. However, the main limiting factor in implementing these antennas in many applications is their low impedance bandwidth (typically 2-3%). One popularly used technique of enhancing the bandwidth is to use multi-layered microstrip[1,2]. The most widely accepted structure in ...

Analysis and design of the planar microstrip antenna have been discussed in the preceding chapters. Planar microstrip antenna by and large can be considered to have reached its maturity. Development of conformable antennas on non planar surfaces lags behind vis-à-vis planar microstrip antennas. Relatively non planar or microstrip antennas conformable to non planar surfaces are at present topic ...

Microstrip patch antennas has many advantage due to light weight and small size, low cost but also have some disadvantage as low gain , narrow band width these are the two important parameters. This review paper describe how we can increase the performance of the patch antenna by using metamaterials or how we can improve the gain & bandwidth. Here we first provide the introduction of metamateri...

Microstrip patch antennas can be fed by a variety of methods. These methods can be classified into two categoriescontacting and non-contacting. In the contacting method, the RF power is fed directly to the radiating patch using a connecting element such as a microstrip line. In the non-contacting scheme, electromagnetic field coupling is done to transfer power between the microstrip line and th...

Differential evolution (DE) algorithm is applied to the design of single-layer and multi-layer microstrip antennas. For the design of single-layer co-axial probe-fed microstrip antenna, fitness function is obtained from cavity model theory of microstrip antenna, whereas for the design of multi-layer aperture-coupled microstrip antenna, transmission line model is used to obtain fitness function ...

Rectangular microstrip structures are widely used in various microwave devices. Using the method of moments and principle of partial images, various techniques are developed to determine charge distribution in 2D models of microstrip structures (their cross-section). In this paper, a technique for calculating surface charge distribution and total capacitance of complex 3D rectangular microstrip...