Power Measurements for Wide Frequency Band from DC to VHF Region Employing Hall Element and Magnetoresistance Element

Asymmetrical-fed RHCP Wide-Band Slot Element for X-Band applications

An outstanding square slot element, for x-band wireless applications with asymmetric coplanar waveguide fed (CPW) is proposed. Various shapes of metallic strips are utilized as grounded stubs for providing Right Hand Circular Polarization (RHCP) functionality and wide-band properties. By adjusting the proposed stubs and hook-shaped radiator, length and positions, wider impedance band width is o...

Designing Wide-band Transformers for HF and VHF Power Amplifiers

In the design of RF power amplifiers, wide-band transformers play an important role in the quality of the amplifier as they are fundamental in determining the input and output impedances, gain flatness, linearity, power efficiency and other performance characteristics. The three forms of transformers that are encountered, unbalanced-to-unbalanced (unun), balanced-to-balanced (balbal), and balan...

System Noise Analysis of an Ultra Wide Band Aperture Array Element for Low Frequency Radio Astronomy

One of the biggest challenges in radio astronomy for the 21st century is the SKA telescope, the newest radio telescope in the world to be built as a Square Kilometre Array of antennas distributed in hundreds of stations to form an interferometric image of the sky. Below 1 GHz, these stations will be composed of thousands of inexpensive elements in a dense or sparse configuration delivering data...

Finite-Element Modelling and Analysis of Hall Effect and Extraordinary Magnetoresistance Effect

Wide Band Nonuniform Substrate Integrated Waveguide (NSIW) Wilkinson Power Divider

A new wideband Wilkinson Power Divider which use the nonuniform substrate integrated waveguide (NSIW) method is presented in this paper. This structure utilizes NSIWs instead of the uniform quarter wavelength SIWs in conventional Wilkinson power divider. The proposed structure is analyzed by odd and even mode analysis. The proper NSIW section widths can be extracted by using even mode while the...