Microwave high power amplifier technologies for space-borne applications

Ayllon, Natanael

doi:10.1109/wamicon.2015.7120429

Cited by 10 publications

(3 citation statements)

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“…Taking the Cassini experiment as a reference, in which a Kα-band travelling wave tube amplifier (TWTA) on board the spacecraft had an output power of 10 W for a distance of 5 AU [25], therefore for the distance of 1.5 AU as in DOCS, an amplifier roughly needs an output power of 10 × (1.5/5) 2 W ≈ 1 W. This amplifier can be easily satisfied, e.g. today the most advanced amplifier in space for Kα-band communication can reach an output of 250 W with a bandwidth of 2.9 GHz [48,49]. However, in Cassini project a 4 meter diameter antenna on board the spacecraft, and especially a 34 meter diameter antenna receiver on ground were used to keep a decent low thermal noise level [25].…”

Section: Technical Issues To Be Solvedmentioning

confidence: 99%

“…This amplifier can be easily satisfied, e.g. today the most advanced amplifier in space for Kα-band communication can reach an output of 250 W with a bandwidth of 2.9 GHz[48,49]. However, in Cassini project a 4 meter diameter antenna on board the spacecraft, and especially a 34 meter diameter antenna receiver on ground were used to keep a decent low thermal noise level[25].It is not yet clear for DOCS if we could achieve a similar or even lower noise level by using similar antennas on board of the two spacecrafts (i.e.…”

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confidence: 99%

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Low-frequency gravitational wave detection via double optical clocks in space

Wang

Wang³

et al. 2018

Class. Quantum Grav.

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We propose a Doppler tracking system for gravitational wave detection via Double Optical Clocks in Space (DOCS). In this configuration two spacecrafts (each containing an optical clock) are launched to space for Doppler shift observations. Compared to the similar attempt of gravitational wave detection in the Cassini mission, the radio signal of DOCS that contains the relative frequency changes avoids completely noise effects due for instance to troposphere, ionosphere, ground-based antenna and transponder. Given the high stabilities of the two optical clocks (Allan deviation ∼ 4.1 × 10 −17 @ 1000 s), an overall estimated sensitivity of 5 × 10 −19 could be achieved with an observation time of 2 years, and would allow to detect gravitational waves in the frequency range from ∼ 10 −4 Hz to ∼ 10 −2 Hz.

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Section: Technical Issues To Be Solvedmentioning

confidence: 99%

mentioning

confidence: 99%

Low-frequency gravitational wave detection via double optical clocks in space

Wang

Wang³

et al. 2018

Class. Quantum Grav.

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“…Additionally, since the available energy in a spacecraft is limited, due to the restricted number of solar panels and batteries, also the efficiency of every subsystem becomes a key feature. Therefore, the design of space-borne components is usually the result of a compromise among many aspects [1].…”

Section: Introductionmentioning

confidence: 99%

A high-power solid state amplifier for Galileo satellite system exploiting European GaN technology

Giofrè

Colantonio

Cipriani

et al. 2016

Int. J. Microw. Wireless Technol.

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This paper describes the development of an L-Band (f0= 1.575 GHz) high power and efficient solid state power amplifier (SSPA) designed for the European satellite navigation system (i.e. Galileo). The amplifier, developed in the framework of the European Project named SLOGAN, exploits the GH50-10 GaN technology available at United Monolithic Semiconductor foundry. The aim of the project is to offer, using as much as possible European technologies, a valid alternative to replace traveling wave tube amplifiers with more compact and reliable systems. All the SSPA functionalities, i.e. power supply, power conditioning and radio frequency amplification, are integrated in the developed architecture and accommodated in a single box with limited volume and mass. The required output power level is achieved by parallelizing several GaN die power bars of 12 and/or 25.6 mm. In continuous wave operating mode, the overall SSPA delivers an output power higher than 250 W at less than 2 dB of gain compression in the whole E1-band. Moreover, the registered gain and efficiency are higher than 67 dB and 54%, respectively.

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