The design and analysis of ellipse shaped broad band micro strip patch antenna are discussed in this paper. In modern wireless communication system at the higher frequency, this basically needs all its components to be in compact size. The proposed antenna inspired by ellipse shaped which offer the better performance compare to the conventional antenna. Here, the proposed antenna is one such co...

Satellite radar altimeters have been successfully used for sea surface height (SSH) measurement decades, gaining great insight in oceanography, meteorology, marine geology, etc. To further improve the observation precision and spatial resolution, evolved from real aperture to synthetic aperture, Ku-band Ka-band. Future (SAR) altimeter of Ka-band is expected achieve better performance than its p...

We study some aspects of the Ka luża-Klein Melvin solution in M-theory. The associated magnetic field has a maximal critical value B = ±1/R where R is the radius of the compactification circle. It is argued that the Melvin background of type IIA with magnetic field B and of type 0A with magnetic field B = B−1/R are equivalent. Evidence for this conjecture is provided using a further circle comp...

Efficiency observations performed in January and February 2009 during clear dry weather with the EVLA receivers mounted on antenna #24 show excellent performance at K, Ka, and Q bands. System temperatures are well below project requirements, with mid-band values of 37, 43, and 58 K at K, Ka, and Q bands, respectively. Antenna efficiencies decline smoothly with increasing frequency, from a high ...