High-power microstrip switch

Switch, which uses only two p-i-n diodes on microstrip substrate, has been developed for application in spacecraft radio systems. Switch features improved power drain, weight, volume, magnetic cleanliness, and reliability, over currently-used circulator and electromechanical switches

High power arcjet

The activities of the High Power Arcjet Project (HIPARC) from August 1990 to January 1991 are discussed. In this period the HIPARC thruster was ignited for the first time. Power levels up to 140 kW with a mass flow rate of 300 mg/s hydrogen were reached. Specific impulse values of more than 1300 s were shown to be possible. Tests were performed with the baseline thruster version only, which has a 6 mm throat diameter and a conical nozzle with a 20 degree half angle. Measurement data summing up all tests carried out until now is included. All measuring methods are described, including a check on possible error sources

Pengontrolan High Power Amplifier dan Driver Standar Dvb-t2 untuk Pemancar TV Komunitas

Sistem penyiaran TV di Indonesia masih menggu[nakan modulasi analog. Hal ini mengakibatkan penggunaan bandwidth frekuensi UHF tidak efisien. TV digital dikembangkan sebagai solusi permasalahan tersebut.Bandwidth UHF pada TV digital mampu menduduki 9 kanal televisi dalam bandwidth 8 Mhz. Pada penelitian sebelumnya, telah dirancang suatu HPA standar DVB T-2 sebagai salah satu komponen transmitter TV digital untuk TV Komunitas. Namun, perangkat power amplifier ini sangat rentan dan mudah rusak jika tidak memiliki pengontrolan yang cepat dan tepat. Sehingga diperlukan suatu sistem pengontrolan power amplifier untuk meningkatkan efesiensi penggunaan power amplifier tersebut di sisi transmitter TV komunitas.Penelitian ini membahas perancangan sistem pengontrolan HPA (High Power Amplifier) dan driver standar DVB-T2 berbasis mikrokontroller yang diintegrasikan dengan sms gateway sehingga pengontrolan perangkat penguat tersebut bisa dilakukan dari jarak jauh.Power Amplifier UHF ini memiliki VSWR 1.329 pada frekuensi tengahnya hal ini telah memenuhi speifikasi awal, yaitu VSWR ≤1.5. Dengan bandwidth sebesar 225 MHz serta memiliki gain sebesar 18 dB. Penguatan sinyal yang dihasilkan sesuai dengan parameter yang dikejarnya, sehingga mampu memancarkan sinyal informasi melalui transmitter TV digital. Namun aplikasi sistem pengontrolan power amplifier yang dibangun belum terwujud sempurna karena masih harus banyak perbaikan interface dan sistem yang belum terintegrasi dengan sempurna

High power metallic halide laser

A laser amplification system is disclosed whereby a metallic halide vapor such as copper chloride is caused to flow through a laser amplifier and a heat exchanger in a closed loop system so that the flow rate is altered to control the temperature rise across the length of the laser amplifier. The copper atoms within the laser amplifier should not exceed a temperature of 3000 K, so that the number of copper atoms in the metastable state will not be high enough to prevent amplification in the amplifier. A molecular dissociation apparatus is provided at the input to the laser amplifier for dissociating the copper chloride into copper atoms and ions and chlorine atoms and ions. The dissociation apparatus includes a hollow cathode tube and an annular ring spaced apart from the tube end. A voltage differential is applied between the annular ring and the hollow cathode tube so that as the copper chloride flows through, it is dissociated into copper and chlorine ions and atoms

High-power transmitter automation

The current status of the transmitter automation development applicable to all transmitters in the deep space network is described. Interface and software designs are described that improve reliability and reduce the time required for subsystem turn-on and klystron saturation to less than 10 minutes

High-power radiating plasma

The physical principles underlying the use of radiating plasmas for the optical pumping of lasers are described. Particular consideration is given to the properties of radiating plasmas; radiation selectivity; the dynamics, equilibrium, and stability of radiating plasmas; the radiative Reynolds number; and experimental results on radiating discharges

High power-high voltage waterload Patent

Variable water load for dissipating large amounts of electrical power during high voltage power supply test

High power laser apparatus and system

A high-power, continuous-wave laser was designed for use in power transmission and energy-collecting systems, and for producing incoherent light for pumping a laser material. The laser has a high repetitive pulsing rate per unit time, resulting in a high-power density beam. The laser is composed of xenon flash tubes powered by fast-charging capacitors flashed in succession by a high-speed motor connected to an automobile-type distributor

Improved high power/high frequency inductor

A toroidal core is mounted on an alignment disc having uniformly distributed circumferential notches or holes therein. Wire is then wound about the toroidal core in a uniform pattern defined by the notches or holes. Prior to winding, the wire may be placed within shrink tubing. The shrink tubing is then wound about the alignment disc and core and then heat-shrunk to positively retain the wire in the uniform position on the toroidal core