What is the difference between hpa and sspa

We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime. Twta and sspa. Upcoming SlideShare. Like this presentation? Why not share! Amplifiers Pesentation by Anmol Bagga views. Embed Size px. Start on. Show related SlideShares at end. WordPress Shortcode. Next SlideShares. Download Now Download to read offline and view in fullscreen.

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Leelarani Chittiprolu. Cuma Kaya. Neha Nainta. As shown TWTA consists of cathode, electron gun, tube structure and collector plate. Cathode is the source of electrons. This cathode is heated at approx. High voltage bias application results into generation of electrons down the tube structure. As cathode has finite source of electrons, TWT will have certain life time. In SSPA design low or medium power amplifiers are combined to obtain high power output. Solid State amplifiers were only limited by the amount of power they could produce, and that number was increasing on a regular basis.

A collector is a chamber in the TWT where, after the electron beam has interacted with the microwave circuit, electrons are stopped in metallic electrodes, and the remaining kinetic energy is converted to heat.

Multiple collector stages enable more efficient use of the electron beam, thus more prime power is usable and less heat is produced. This results in the ability to produce smaller tubes and amplifiers, and reduces the power needed to fan the system and keep it cool. Immediately, TWTAs were drastically reduced in size and became much more efficient. Where previously a W amplifier required over 3 kW of prime power at Plin, the new ones required only 2. While TWTAs could now match SSPAs for efficiency, amplifiers were reduced in size to only 5 to 9 inches high, depending on power level, and lost more than half their weight, down to lbs versus the previous In addition, linearizers were also introduced to the market.