| タイトル | Ka-Band Transponder for Deep-Space Radio Science |
| 本文（外部サイト） | http://hdl.handle.net/2060/20080048033 |
| 著者（英） | Mysoor, Narayan R.; Folkner, William M.; Mendoza, Ricardo; Dennis, Matthew S.; Venkatesan, Jaikrishna |
| 著者所属（英） | California Inst. of Tech. |
| 発行日 | 2008-12-01 |
| 言語 | eng |
| 内容記述 | A one-page document describes a Ka-band transponder being developed for use in deep-space radio science. The transponder receives in the Deep Space Network (DSN) uplink frequency band of 34.2 to 34.7 GHz, transmits in the 31.8- to 32.3 GHz DSN downlink band, and performs regenerative ranging on a DSN standard 4-MHz ranging tone subcarrier phase-modulated onto the uplink carrier signal. A primary consideration in this development is reduction in size, relative to other such transponders. The transponder design is all-analog, chosen to minimize not only the size but also the number of parts and the design time and, thus, the cost. The receiver features two stages of frequency down-conversion. The receiver locks onto the uplink carrier signal. The exciter signal for the transmitter is derived from the same source as that used to generate the first-stage local-oscillator signal. The ranging-tone subcarrier is down-converted along with the carrier to the second intermediate frequency, where the 4-MHz tone is demodulated from the composite signal and fed into a ranging-tone-tracking loop, which regenerates the tone. The regenerated tone is linearly phase-modulated onto the downlink carrier. |
| NASA分類 | Communications and Radar |
| レポートNO | NPO-46698 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/506874 |
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