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Communications and Power Industries (CPI) has designed and manufactured the VTU-6398D9C, a compact high peak power, high linear power, high efficiency, and conduction-cooled helix vacuum electron device. The helix traveling wave tube operates with a 1,100 MHz instantaneous bandwidth and covers the full extended DBS band of 17.3 to 18.4 GHz. The minimum peak rf output power is 1,250 watts, and the...
A fully integrated Ku-band down-converter front-end for digital broadcast satellite (DBS) receiver in a 0.18 µm SiGe BiCMOS technology is presented. To meet the specifications in different areas, the circuit can cover a wide RF range (10.7–13.45 GHz) with four LO frequencies, and down convert the RF signal to L-Band (950–2150 MHz). Compared with previous works, the presented down-converter using a...
This paper presents an analysis of optimum rectifier circuits for wireless energy harvesting in deep brain stimulation (DBS) devices. Since DBS demands compact and low power consumption devices, small, high conversion efficient, and high output voltage rectifiers need to be developed. The investigation that is presented in this paper is analytical and simulated based. Analysis on a variety of circuit...
NEC Microwave Tube, Ltd.(NEMT) has been developed the new DBS bands (17.3 to 18.4 GHz) high power TWT for satellite uplink applications. This DBS band TWT is applied the technology of high power conduction cooled TWTs grown in C band and Ku band. As the features, these TWTs have realized high efficiency (low power consumption) by use of dual stage depressed collector, as well as get a substantial...
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