Articles | Volume 6, issue 1
Geosci. Instrum. Method. Data Syst., 6, 159–167, 2017
https://doi.org/10.5194/gi-6-159-2017
Geosci. Instrum. Method. Data Syst., 6, 159–167, 2017
https://doi.org/10.5194/gi-6-159-2017

Research article 31 Mar 2017

Research article | 31 Mar 2017

One-chip analog circuits for a new type of plasma wave receiver on board space missions

Takahiro Zushi, Hirotsugu Kojima, and Hiroshi Yamakawa Takahiro Zushi et al.
  • Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, 611-0011, Japan

Abstract. Plasma waves are important observational targets for scientific missions investigating space plasma phenomena. Conventional fast Fourier transform (FFT)-based spectrum plasma wave receivers have the disadvantages of a large size and a narrow dynamic range. This paper proposes a new type of FFT-based spectrum plasma wave receiver that overcomes the disadvantages of conventional receivers. The receiver measures and calculates the whole spectrum by dividing the observation frequency range into three bands: bands 1, 2, and 3, which span 1 Hz to 1 kHz, 1 to 10 kHz, and 10 to 100 kHz, respectively. To reduce the size of the receiver, its analog section was realized using application-specific integrated circuit (ASIC) technology, and an ASIC chip was successfully developed. The dimensions of the analog circuits were 4.21 mm  ×  1.16 mm. To confirm the performance of the ASIC, a test system for the receiver was developed using the ASIC, an analog-to-digital converter, and a personal computer. The frequency resolutions for bands 1, 2, and 3 were 3.2, 32, and 320 Hz, respectively, and the average time resolution was 384 ms. These frequency and time resolutions are superior to those of conventional FFT-based receivers.

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Short summary
Plasma waves are important observational targets for scientific missions investigating space plasma phenomena. Conventional plasma wave receivers have the disadvantages of a large size and a narrow dynamic range. We proposes a new receiver that overcomes the disadvantages of conventional receivers. The analog section of the new receiver was realized using application-specific integrated circuit (ASIC) technology in order to reduce the size, and an ASIC chip was successfully developed.