ABSTRACT Characterizing spectral variability of radio sources is a technique that offers the ability to determine astrophysics intervening media, source structure, emission, and absorption processes. We present broadband (0.072–10 GHz) 15 peaked-spectrum (PS) with Australia Telescope Compact Array (ATCA) Murchison Widefield (MWA). These PS were observed quasi-contemporaneously ATCA MWA four six...

A wide-band phased array antenna with wide-angle scanning capability for mobile communication system is proposed in this article. An air cavity properly embedded into the substrate under each element. This method very simple and can efficiently enhance performance by improving impedance matching (WAIM) realizing beam-width of elements array. Besides, operating bandwidth also extended approach. ...

In this white paper we discuss strategies for a wide-band continuum and spectral line galactic plane survey in the l-band exploiting the power of the vla’s widar correlator for simultaneous high resolution observations of the h  21cm line, all four oh transitions, 18 radio recombination lines (both h and c), and the 1066mhz transition of formaldehyde. All other existing surveys of the galactic...

A transimpedance ampli er with nominal performance of 355MHz bandwidth, 20.6k transresistance, total equivalent input current noise of 43.1nA rms, and power dissipation of 20.7mW is presented.

In this work we present the concept of wide band interferometry as opposed to white-light interferometry to introduce a thickness measurement method that gains precision when the bandwidth is reduced to an adequate compromise in order to avoid the distortions arising from the material dispersion. The use of the widest possible band is a well established dogma when the highest resolution is desi...

ULTRA WIDE BAND VCO USING CMOS TECHNOLOGY Seema Malik, Mr. Sunil Kumar M.Tech (VLSI Design), Banasthali University, Banasthali, Jaipur, Rajasthan, INDIA 2 Scientist (Agriculture Statistics), Project Directorate for Farming System Research, Modipuram, Meerut (U.P) 250-110, INDIA ___________________________________________________________________________________ Abstract: Ultra wideband (UWB) wir...

This paper presents coplanar waveguide (CPW) fed slot antenna. A rectangular slot antenna is excited by a 50 ohm CPW with L-shaped tuning stub. It can achieves wide band from 2.0 GHz to 6 GHz which is the frequency band covered the standard IEEE 802.11a/b/g for use in WLAN (Wireless Local Area Network) and covered the WiMAX (Worldwide Interoperability for Microwave Access, 2-6 GHz). The charact...

Acknowledgment There is no way I could come through the course of the project without the help from these people and institutions. First of all, I would like to thank my advisor Professor Bob Brodersen for his support and guidance ever since I joined the group. His trust and insight has helped me out at the various time of this project. Also his personality and vision has offered me a great mod...