The effect of antenna performance on the carrier phase measurement accuracy is described. The antenna performance characteristics in the presence of multipath are analyzed in terms of an antenna Axial Ratio and an antenna Noise Figure. In this analysis, the multipath is assumed to originate from a single point located on a perfectly conducting ground. The analysis focuses on the carrier phase s...

In this paper, a directional GPS antenna for L1 frequency 1575 MHz with RHCP and a high directive gain is proposed for indoor positioning applications. The proposed antenna is made of a standard off the shelf GPS patch antenna with an additional conical reflector to enhance the gain and the beamwidth of the antenna. The angle of the cone reflector is optimized by HFSS 11 software. Finally, the ...

The radiation field from a transmitting antenna is characterized by the complex Poynting vector E x H* in which E is the electric field and H is the magnetic field. Close to the antenna the Poynting vector is imaginary (reactive) and (E,H) decay more rapidly than 1/r, while further away it is real (radiating) and (E,H) decay as 1/r . These two types of fields dominate in different regions in sp...

Antenna calibration measurement is a specific type of multidimensional measurement with a plenty of influencing factors. In order to validate these measurements, the specialized methodology with a goal of improving the calibration procedures has been developed. The method is based on cluster analysis of existing antenna calibration measurements in a combination with tailored outlier detection m...

A fully polarimetric borehole radar system with four combinations of dipole and cylindrical slot antennas, as shown in Fig. 1, was developed to acquire fully polarimetric data sets in drilled boreholes [1]. The system in conjunction with a methodology of radar polarimetry analysis, proposed in previous (a) Measurement configuration (b) Antenna arrangements for polarimetric data collection Fig. ...

This paper presents a simple antenna system for land vehicle communication aimed at Engineering Test Satellite-VIII (ETS-VIII) applications. The developed antenna system which designed for mounting in a vehicle is compact, light weight and offers simple satellite-tracking operation. This system uses a microstrip patch array antenna, which includes onboard-power divider and switching circuit for...

Abstract—In this paper we have developed a FDTD simulation code which can treat wave propagation of a monopole antenna in a metallic case which covers with PML, and performed a series of three dimensional FDTD simulations of electromagnetic wave propagation in this space .We also provide a measurement set up in antenna lab and fortunately the simulations and measurements show good agreement. Ac...

Author: Jari-Matti Hannula Title: On the Use of Intermodulation Response for Characterizing Antennas Date: May 20, 2015 Number of pages: 63 Unit: Department of Radio Science and Engineering Field of research: Radio Science and Engineering Supervisor: Assistant Professor Ville Viikari Advisor: M.Sc. (Tech.) Kimmo Rasilainen The intermodulation measurement technique enables the contactless measur...

A multiband Fractal Koch dipole textile antenna is proposed for wearable applications. The antenna is designed to operate at 0.9 GHz, 2.45 GHz and 5.8 GHz. Denim materials as the substrate are selected aiming to obtain robustness, flexibility and a lightweight textile antenna. The antenna model is designed, simulated, optimized and analyzed using Microwave Studio CST software. Two types of mult...

We address the issue of MIMO channel estimation with the aid of a priori temporal correlation statistics of the channel as well as the spatial correlation. The temporal correlations are incorporated to the estimation scheme by assuming the Gauss-Markov channel model. Under the MMSE criteria, the Kalman filter performs an iterative optimal estimation. To take advantage of the enhanced estimation...