A four element prototype phased array surface probe has been designed and constructed to improve clinical human prostate spectroscopic data. The probe consists of two pairs of adjacent rectangular coils with an optimum overlap to reduce the mutual inductance. The two pairs are positioned on the anterior and the posterior pelvic region and two couples of varactors at the input of each coil under...

We describe a waveguide to thin-film microstrip transition for highperformance submillimetre wave and teraherz applications. The proposed constant-radius probe couples thin-film microstrip line, to fullheight rectangular waveguide with better than 99% efficiency (VSWR ≤ 1.20) and 45% fractional bandwidth. Extensive HFSS simulations, backed by scale-model measurements, are presented in the paper...

INTRODUCTION A SAR-probe is usually calibrated using a rectangular waveguide with a matching dielectric spacer below 3 GHz [1, 2]. However, the probe diameter is comparable with the aperture size of the waveguide above 3 GHz, and it can deteriorate the accuracy of the calibration. Therefore, an alternative calibration method using a reference antenna in the phantom liquid has been examined [3]....

On the basis of the Keldysh method of nonequilibrium systems, we develop a theory of electron tunneling in normal-metal–superconductor junctions. By using the tunneling Hamiltonian model ~being appropriate for the tight-binding systems!, the tunneling current can be exactly obtained in terms of the equilibrium Green functions of the normal metal and the superconductor. We calculate the conducta...

This paper describes the design of H and T-Slotted Rectangular Microstrip Patch Antennas (RMPA) which resonates at a frequency of fo = 2. 4 GHz. The FR4 glass Epoxy with relative permittivity 4. 4 and height 1. 6 mm is used as substrate material. Antenna is fed by coaxial probe feed and simulated using HFSS. This antenna used to various wireless applications such as WiMAX, Wi-Fi, and Digital Mu...

A cross slotted electronic band gap (EBG) with stacked rectangular patches shorted with a shorting pin is proposed in this paper. The study is being done on how the various parameters are varied by changing the probe feed location. The design is constructed by using stacking of patches, shorting pin and cross slotted EBG to form an optimized antenna design with antenna efficiency of approximate...

Motivation Diffusion weighted Hyperecho (HEDW) Imaging [1-3] has maintained some interest during the last years since it has the potential to offer a probe for tissue microstructure. One meaningful parameter for such a multi spin echo diffusion sequence is the knowledge of the exact effective b-factor [4] exhibited. The present work examines the effect of the common simplification to use rectan...

|We introduce a neareld to fareld transformation algorithm that relaxes the usual restriction that data points be located on a plane-rectangular grid. Computational complexity is O (N logN), where N is the number of data points. This algorithm allows e cient processing of neareld data with known probe position errors. Also, the algorithm is applicable to other measurement approaches, such as pl...

A novel single layer, coaxial probe feed compact triple band slotted microstrip patch antenna with modified ground plane for wireless application has been designed and analyzed. The presented antenna, occupying a compact size of 24 × 22 × 1.6mm3, embodies a rectangular slotted patch and a rectangular ground plane modified with open ended step graded slots. The step graded slots are introduced o...