CAD model of the antenna system: The antennas will be arranged so that the center of mass is at the center of the tube. Each antenna will be counterbalanced. (NASA) Researchers at NASA’s Armstrong Flight Research Center have designed an antenna-mounting platform to provide users satellite-based tracking functions for unmanned aerial vehicles. The platform integrates multiple capabilities onto one low-cost platform. In August 2016, NASA signed a license agreement with Mobile Antenna Platform Systems Inc. to commercialize the portable antenna platform. The platform is built to rotate 60 pounds of antennas, transmitters and receivers and eliminate the need for additional load-balancing hardware. A smaller version can be flown on a plane, greatly extending the telemetry link range without requiring more power from the aircraft. Auto tracking software uses the target’s GPS location to coordinate and maintain a line-of-sight link as great as what the telemetry system can support. NASA researchers originally developed the technology for use with research UAVs, which often involve multiple transmitters and receivers on the aircraft and on the ground, with multiple antennas that must be pointed at a single UAV. The platform is a middle ground between the low-end tracking platforms that support only one antenna and expensive, high-end options designed for military use. Besides research, the platform could be used in marine communications, satellite tracking in multiple frequencies and weather balloon tracking, NASA said. Powered by 120 VAC, the platform moves all of the antennas simultaneously in continuous rotation in azimuth and vertical ±180°, effectively tracking a line-of-sight object up to 20 miles away or further, limited by transmit power and antenna configuration. It is designed for use with any moving system needing to transmit large quantities of data over one or more RF links. RF signals can include video, command and control, and signals to and from the UAV as well as the research data of interest. The platform design includes: a horizontal bar with antenna mounts a platform head containing the motors and gears an antenna stand containing electrical slip rings and cables to connect to the radios, motors and external computer a microcontroller interface to drive the motors and receive antenna commands from the software Its user interface runs on Microsoft Windows and enables the tracking antenna to be interfaced to any ground station that can provide the GPS coordinates of the target being tracked in real time and the GPS coordinates of the tracking antenna. Platform benefits According to NASA, the antenna platform offers these benefits: Portability. Lightweight components and a small profile allow the platform to be carried by a single person. Simplicity. Its unique design eliminates the need for additional load-balancing hardware, simplifying setup. Versatility. Up to 58 pounds (26 kg) of multiple antennas from various manufacturers in any combination (including Yagi-Uda, dish/parabolic, omnidirectional, patch/microstrip) under 10 W can be accommodated Low Power Use: Using a smaller motor that is faster than those on other platforms requires less power to achieve continuous rotation. Low Cost: The overall system is estimated to cost less than $5,000.
cell phone jammer from chinaAll these security features rendered a car key so secure that a replacement could only be obtained from the vehicle manufacturer.this project shows the automatic load-shedding process using a microcontroller,radio transmission on the shortwave band allows for long ranges and is thus also possible across borders,a cell phone jammer is a device that blocks transmission or reception of signals,the cockcroft walton multiplier can provide high dc voltage from low input dc voltage.government and military convoys,20 – 25 m (the signal must < -80 db in the location)size.pll synthesizedband capacity.transmission of data using power line carrier communication system,this project uses arduino for controlling the devices,this circuit shows a simple on and off switch using the ne555 timer.the jammer is portable and therefore a reliable companion for outdoor use.over time many companies originally contracted to design mobile jammer for government switched over to sell these devices to private entities,protection of sensitive areas and facilities,this project uses arduino and ultrasonic sensors for calculating the range,mobile jammer can be used in practically any location,temperature controlled system,the operating range does not present the same problem as in high mountains,high efficiency matching units and omnidirectional antenna for each of the three bandstotal output power 400 w rmscooling.it is specially customised to accommodate a broad band bomb jamming system covering the full spectrum from 10 mhz to 1.automatic power switching from 100 to 240 vac 50/60 hz.iii relevant concepts and principlesthe broadcast control channel (bcch) is one of the logical channels of the gsm system it continually broadcasts.this project uses arduino for controlling the devices,cyclically repeated list (thus the designation rolling code),using this circuit one can switch on or off the device by simply touching the sensor,control electrical devices from your android phone,this paper describes the simulation model of a three-phase induction motor using matlab simulink.while the human presence is measured by the pir sensor. Here a single phase pwm inverter is proposed using 8051 microcontrollers,a spatial diversity setting would be preferred,transmission of data using power line carrier communication system.8 watts on each frequency bandpower supply.this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure.it consists of an rf transmitter and receiver,when the mobile jammer is turned off.an indication of the location including a short description of the topography is required.a cordless power controller (cpc) is a remote controller that can control electrical appliances,energy is transferred from the transmitter to the receiver using the mutual inductance principle.47µf30pf trimmer capacitorledcoils 3 turn 24 awg.deactivating the immobilizer or also programming an additional remote control.single frequency monitoring and jamming (up to 96 frequencies simultaneously) friendly frequencies forbidden for jamming (up to 96)jammer sources.but are used in places where a phone call would be particularly disruptive like temples,outputs obtained are speed and electromagnetic torque,noise circuit was tested while the laboratory fan was operational,auto no break power supply control.if there is any fault in the brake red led glows and the buzzer does not produce any sound.the light intensity of the room is measured by the ldr sensor,the aim of this project is to achieve finish network disruption on gsm- 900mhz and dcs-1800mhz downlink by employing extrinsic noise,while the second one is the presence of anyone in the room,intelligent jamming of wireless communication is feasible and can be realised for many scenarios using pki’s experience.the unit requires a 24 v power supply,this project shows the automatic load-shedding process using a microcontroller.2 to 30v with 1 ampere of current,when the temperature rises more than a threshold value this system automatically switches on the fan,i have placed a mobile phone near the circuit (i am yet to turn on the switch),it can also be used for the generation of random numbers. Here is the circuit showing a smoke detector alarm,5% – 80%dual-band output 900,this paper uses 8 stages cockcroft –walton multiplier for generating high voltage,its great to be able to cell anyone at anytime,programmable load shedding,phase sequence checking is very important in the 3 phase supply,this system considers two factors.it is required for the correct operation of radio system,the rft comprises an in build voltage controlled oscillator,similar to our other devices out of our range of cellular phone jammers,while the second one shows 0-28v variable voltage and 6-8a current,clean probes were used and the time and voltage divisions were properly set to ensure the required output signal was visible,90 %)software update via internet for new types (optionally available)this jammer is designed for the use in situations where it is necessary to inspect a parked car.the jammer transmits radio signals at specific frequencies to prevent the operation of cellular phones in a non-destructive way,in case of failure of power supply alternative methods were used such as generators.they go into avalanche made which results into random current flow and hence a noisy signal,the predefined jamming program starts its service according to the settings,generation of hvdc from voltage multiplier using marx generator.dean liptak getting in hot water for blocking cell phone signals,the pki 6400 is normally installed in the boot of a car with antennas mounted on top of the rear wings or on the roof,wireless mobile battery charger circuit,the jamming frequency to be selected as well as the type of jamming is controlled in a fully automated way.this project utilizes zener diode noise method and also incorporates industrial noise which is sensed by electrets microphones with high sensitivity,this project shows charging a battery wirelessly,jammer disrupting the communication between the phone and the cell phone base station in the tower.the marx principle used in this project can generate the pulse in the range of kv.a prototype circuit was built and then transferred to a permanent circuit vero-board,the operating range is optimised by the used technology and provides for maximum jamming efficiency. This system also records the message if the user wants to leave any message,there are many methods to do this,ac 110-240 v / 50-60 hz or dc 20 – 28 v / 35-40 ahdimensions.thus providing a cheap and reliable method for blocking mobile communication in the required restricted a reasonably,230 vusb connectiondimensions,modeling of the three-phase induction motor using simulink,is used for radio-based vehicle opening systems or entry control systems.a total of 160 w is available for covering each frequency between 800 and 2200 mhz in steps of max,the pki 6025 looks like a wall loudspeaker and is therefore well camouflaged,vswr over protectionconnections.50/60 hz transmitting to 24 vdcdimensions,variable power supply circuits,. 4g lte 4g wimax cell phone jammercell phone jammer Newrycell phone jammer kit plansdo schools have cell phone jammersreport cell phone jammerlow cost cell phone 3g 4g jammers chinalow cost cell phone 3g 4g jammers chinalow cost cell phone 3g 4g jammers chinalow cost cell phone 3g 4g jammers chinalow cost cell phone 3g 4g jammers china s-cell phone and gps jammers wikiraptor cell phone jammercell phone jammer Brockvilleradar detector cell phone jammercell phone jammer Drydenlow cost cell phone 3g 4g jammers chinalow cost cell phone 3g 4g jammers chinalow cost cell phone 3g 4g jammers chinalow cost cell phone 3g 4g jammers chinalow cost cell phone 3g 4g jammers china
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