Abstract: The present invention relates to polymorphic forms of 5-Azacytidine and the process for preparation thereof. The present invention further relates to Crystalline 5-azacytidine 5 designated as Form-SA-1 characterized by an X-ray powder diffraction pattern having at least four characteristic diffraction angle peaks at about 12.00, 12.60, 13.90, 15.15 and 31.40±0.20 2?°, which is useful as active pharmaceutical ingredient in pharmaceutical compositions for the treatment of myelodysplastic syndrome.

Abstract: The present invention relates to lyophilized formulations comprising crystalline 5-azacytidine and process for preparing lyophilized formulations comprising crystalline 5-azacytidine.

Abstract: The directional coupler supports ultra high bandwidth of 5600 MHz (from 400 MHz to 6 GHz) in compact structure and also provides high directivity of (>15 dB). The coupler uses a two stage micro-strip directional coupler for a frequency range of 400 MHz to 6 GHz, where the first stage supports a frequency of operation from 0.4 GHz to 1 GHz and the second stage supports a frequency of operation from 1 GHz to 6 GHz and the required coupled port can be chosen using a radio frequency switch as required by the application used in.

Abstract: Multi-channel broadband re-configurable RF Front End for Software Defined Radio/Cognitive Radio. The RF front end helps improve spectrum sensing for better spectrum utilization. The RF front end comprising of multiple channels of reconfigurable transmitters and receivers, Tx/Rx switch, reference section, control section and power section is described. The RF front-end transceiver comprises of multiple channels and adapts its parameters based on the radio environment. The RF front end works on wide bandwidth and reconfigures its parameters.

Abstract: An RF receiver system operating on a broader frequency range and wide input dynamic power range is described. Received RF signal is downconverted to baseband signal using multiple quadrature demodulators. A microcontroller system controls the RF receiver by selecting frequency range to be produced by the frequency synthesizer, selecting appropriate amplification path for producing the required output power, controlling the power module for checking for automatic power gain and automatic gain control.

Abstract: An RF transmitter system operating on a broader frequency range and providing a higher output power dynamic range is described. Low power RF signal is produced from a baseband signal using a quadrature modulator and using a broadband local oscillator signal. A microcontroller system controls the RF transmitter by selecting frequency range to be produced by the frequency synthesizer, selecting appropriate amplification path for producing the required output power, controlling the power detection sections for providing precise automatic power and automatic gain control.

Abstract: Multi-channel broadband re-configurable RF Front End for Software Defined Radio/Cognitive Radio. The RF front end helps improve spectrum sensing for better spectrum utilization. The RF front end comprising of multiple channels of reconfigurable transmitters and receivers, Tx/Rx switch, reference section, control section and power section is described. The RF front-end transceiver comprises of multiple channels and adapts its parameters based on the radio environment. The RF front end works on wide bandwidth and reconfigures its parameters.

Abstract: The directional coupler supports ultra high bandwidth of 5600 MHz (from 400 MHz to 6 GHz) in compact structure and also provides high directivity of (>15 dB). The coupler uses a two stage micro-strip directional coupler for a frequency range of 400 MHz to 6 GHz, where the first stage supports a frequency of operation from 0.4 to 1 GHZ and the second stage supports a frequency of operation from 1 GHz to 6 GHz and the required coupled port can be chosen using a radio frequency switch as required by the application used in.

Abstract: An RF receiver system operating on a broader frequency range and wide input dynamic power range is described. Received RF signal is downconverted to baseband signal using multiple quadrature demodulators. A microcontroller system controls the RF receiver by selecting frequency range to be produced by the frequency synthesizer, selecting appropriate amplification path for producing the required output power, controlling the power module for checking for automatic power gain and automatic gain control.

Abstract: An RF transmitter system operating on a broader frequency range and providing a higher output power dynamic range is described. Low power RF signal is produced from a baseband signal using a quadrature modulator and using a broadband local oscillator signal. A microcontroller system controls the RF transmitter by selecting frequency range to be produced by the frequency synthesizer, selecting appropriate amplification path for producing the required output power, controlling the power detection sections for providing precise automatic power and automatic gain control.