Design narrow-band compact filters, based on high-quality waveguide-dielectric resonators with anisotropic materials is the subject of this paper. Filter represents a segment rectangular waveguide rotated around longitudinal axis 90 degrees and containing one or more dielectric inserts that completely fill resonator along narrow wall partially wide one. A distinctive feature proposed filter hig...

In this study, effects of modulation types on data transmission performance used in satellite communication systems for earth observation satellites were examined. The effects of PSK modulation, which is commonly used especially in S band and X band communication, on BER-Eb/No performance were also compared. The effects of “8 Phase Shift Keying-8 PSK, 16 Phase Shift Keying-16PSK, 32 Phase Shift...

The total allotted bandwidth available for space-toearth data transmission is 20 MHz in S-band, 375 MHz in X-band and 1500 MHz in Ka-band for Indian Remote Sensing (IRS) Satellites. The band allotted to communication satellites for space to earth communication in GEO missions is C-band (3.7-4.2 GHz). In this band, a small portion is identified for telemetry (TM) data transmission to ground. The...

Ka-band offers the promise of very low-cost broadband terminals deployed in quantities an order of magnitude greater than the total number of all the two-way Cand Ku-band terminals installed since the birth of satellite communications. For small terminals, installation and commissioning costs can easily overwhelm equipment cost unless the terminal is pre-qualified for interference-limiting perf...

With the consideration of the existing Ka-band satellite channel model in data processing method deficiency, the Ka-band satellite channel propagation characteristic is analyzed and the influence of meteorological factors on the satellite channel is discussed. The channel of meteorological factor principal component is obtained by using the principal component analysis and fuzzy clustering anal...

In this paper, a novel microstrip-fed compact antenna with triple band-notched characteristics is presented for ultrawideband (UWB) applications. The antenna consists of a circular radiating patch, a 50 Ω microstrip feed line, a partially slotted ground plane, and a pair of modified capacitance loaded loop (MCLL) resonators. The novel resonators are symmetrically located in the vicinity of the ...

A novel ultra-wideband (UWB) monopole antenna with triple band-notched functions is presented. A pair of folded multiplemode resonators (MMR) symmetrically coupled to the feed line are utilized to generate triple notched bands for WiMAX, WLAN and downlinks of X-band satellite communication, respectively. The centre frequencies and band gaps between them can be tuned by varying the length and wi...

Using restriction endonucleases which preferentially digest mouse main band DNA and leave satellite DNA intact, we have isolated highly purified chromatin fractions containing only mouse satellite or main band DNA. Following the digestion of mouse brain nuclei with EndoR Alu I, main band DNA chromatin is selectively extracted with 10mM Tris, 10mM EDTA. Satellite DNA chromatin is subsequently ex...