Travelling-Wave Tubes for Space Application: Present and Future


Downloads per month over past year

Ghosh, SK (2020) Travelling-Wave Tubes for Space Application: Present and Future. In: URSI Regional Conference on Radio Science (URSI-RCRS 2020), February 12-14, 2020, IIT (BHU), Varanasi, India.

Download (1924Kb) | Preview


Travelling wave tube amplifiers (TWTAs) and solid-state power amplifiers (SSPAs) are the two main RI: amplifiers for onboard communications satellites. In fact, TWTAs are the first successful RF power amplifier technology for communication systems since the birth of space age and covers 60% global market among vacuum tubes for various applications. Both up-linked and down-link signals experience substantial losses and hence must be suitably amplified. However, demand for high power, high frequency, wide-band, high efficiency and with the advancements technology such as linearization, miniaturization, weight reduction, etc. makes TWTAs superior compare to SSPAs and also in the family of vacuum microwave devices and resulting TWTAs as the best choice and no other amplifiers can give similar performance. With advancement of state-of-the-art TWTs for space communication, for instance, wide-band, high power, gain efficiency, reliability, light weight etc make realization of space TWT more and more complex and challenging. However, many of the older version of TWTs have been replaced by its counterpart, SSPA, in L, S, C and X bands where both power and bandwidth requirements were limited. In present generation of TWTs, C, X, Ku and Ka band TWTs are being used with vie wide-band width and much higher performances where SSPAs cannot rival. In addition to that, with the agility of wide-band, high frequency, much higher performance in a single device for next generation realization of space TWTs in above band including W hand and so on becoming a challenge to designers. This paper, presents the state-of-the-art space TWTS for present and future communication satellites.

Item Type: Conference or Workshop Item (Paper)
Subjects: Microwave Tubes > Travelling Wave Tubes
Divisions: Microwave Tubes
Depositing User: Mr. Jitendra Nath Bajpai
Date Deposited: 10 Sep 2021 11:29
Last Modified: 10 Sep 2021 11:29

Actions (login required)

View Item View Item