Among other improvements included lanka sri optimizing lanka sri the standing wave ratio (VSWR) at

Based on the background to its extensive development and production of wave tubes moving coil (TWT) military applications Airborne, developed a e2v, "new generation" of wave tubes moving their use extends beyond airborne applications disrupt signals ("dummy" - decoy), and they are anticipated requirements lanka sri of future systems. The company has created over the past 20 years moving small wave tubes (mini-TWT) broadband (with an operating voltage of 6 pounds - V) for use in airborne jamming trailing. lanka sri The company has developed in the late nineties a small moving wave tube (with an operating voltage of 4.5 pounds - V) for use in airborne jamming trailing which gave a home to maximize military programs in Europe and the U.S..
Diversity standard lanka sri small tubes TWT based on broadband device (4.5 to 18 GHz - Hz) e2v's original 100 watts and to -4.5 pounds - Walt originally planned action at high altitude (70,000 ft, 22,000 m ) and high temperature (greater than 140 C base plate measuring tube TWT). New range of handsets included custom TWT tubes narrow band, with the goal of providing a range of devices to suit future applications, including electronic countermeasures (ECM), electronic warfare (EW), microwave power modules (MPM), pinhole Radar Synthetic (SAR) and microwave data links. these new tubes, based on the rugged and proven technology exists, offer output power, frequency range and efficiency dilated.
Models created for the design of important areas TWT tubes, integrated lanka sri rapid creation of prototypes led to the development of a new family of small TWT tubes, using the design of small tubes TWT standard base. The result yielded lanka sri three ranges of small tubes TWT: N20173 tubes range - 6 to 18 gigabytes - Run, coming from at least 100 watts; range handsets N20160 - 4.5 to 18 GHz - Run, coming from a typical power of 140 watts; range handsets N20154 - 13.75 to 14.5 GHz - Run (Ku Band), coming from at least 120 watts.
TWT tubes standard lanka sri currently operate in this band, 6 to 18 gigabytes - Run, but their output power small upper frequency range. Planning motive of N20173 (shown in Figure 1) was to increase the efficiency of the new device at the higher lanka sri frequencies without taking performance at the low end of the frequency band of operation. This goal was achieved with slow wave structure (SWS) with potentiometer (taper) modern speed performance.
As a result, the new N20173 tube achieves more than 100 watts over the entire frequency band of operation and structure of the RF (RF) reduces new harmony exit to second order less than - 9 dBc at 6 GB - Run. Fig. 2 shows the power versus frequency performance of N20173 small compared TWT tube e2v standard.
Also, port TNC Coaxial Connector provides lanka sri optimized standing wave ratio (VSWR) better than -2.2:1 versions of these tubes range include collectors (collector) with two degrees and three degrees and electrodes ZIP or continuous operation (CW). NV20173 tube compact design compatible TWT tubes e2v's small, with a length of 220 mm, a width of 27 mm and a height of 29 mm and a mass of 320 g. It can operate in temperatures lanka sri of the base plate to 140 C and at altitudes of up to 70,000 feet, and high levels of shocks and vibrations.
For some time there is a growing demand of small tubes TWT higher power, can operate increased bandwidth of 4.5 to 18 GHz - Run. Therefore, the device N20160 (shown lanka sri in Figure 3) was designed as a direct replacement tube little TWT standard, and has the ability to operate in those tensions and keep the same spatial physical shell. lanka sri
Extended performance achieved lanka sri by a combination of increasing the efficiency with the use of a variable resistor speed slow wave structure with an increased flow of fund. N20160 device has power of at least 140 watts from 6 to 13 MB - Run, more than 100 watts in 18 GB - Hertz and more than 50 W 4.5 GHz - Run. Push the maximum RF saturation is necessary +22 dBm, and small signal amplifier intermediate-band concept is 59 dB.
With optimization of slow wave structure was able to expand the performance of the second harmony, which is the dominant feature of the standard multi octaves. The device achieves normal levels of +1 dBc harmony sec 4.5 GB - Hz and - 10 dBc at 6 GB - Run. Figure 4 shows the performance of power versus frequency of N20160 small compared TWT tube e2v standard.
Pre-production models of N20160 were tested using two ranks and pick three levels and achieved regular suppliers (prime power) of less than -460 watts. Extended performance were achieved while maintaining a compact size and weight - length 220 mm, width 27 mm, height of 29 mm and a mass of 320 grams.
N20154 little TWT tube (shown in Figure 5) was developed to meet the increasing demands constantly TWT tubes Low cost, are compact, lightweight and high efficiency applications and data link communications. TWT design of small tubes away from the concept of conventional broadband and optimized specifically for action narrow band communications. This way are advantages of linearity and uniformity improved compared to male Broadband lanka sri devices.
RF circuit optimized around against negative changes lanka sri speed in order to achieve high efficiency of the circuit and combined with multi-stage receptive to exercise overall efficiency of the receiver that is more than 33 percent. Supplier of departure the band is at least 120 watts, with signal booster a characteristic of 52 dB. parameters essential nonlinearity communication tubes. performance characteristic IP output third-order detachment (OBO) of 4 dB are -22 dBc and-OBO of 7 dB are -28 dBc.
Among other improvements included lanka sri optimizing lanka sri the standing wave ratio (VSWR) at the entrance and exit achieves better value than -1.5:1 on the abnormal frequency lanka sri bandwidth