BROWSE
Detail
Conference Paper
High Step Accuracy MMIC Channel Amplifier using Nonlinear Temperature Compensation for Ka-band OBS Satellite Transponder
Cited - time in 
Share 
Share
- Authors
- In Kwon Ju, In Bok Yom
- Issue Date
- 2006-06
- Citation
- AIAA International Communications Satellite Systems Conference (ICSSC) 2006, pp.863-869
- Language
- English
- Type
- Conference Paper
- Abstract
- This paper presents the design and the test results of the high step accuracy MMIC channel amplifier using the nonlinear temperature compensation for the Ka-band OBS satellite transponder. The channel amplifier RF section comprises two kinds of MMIC amplifiers, five MMIC attenuators, a coupler, a detector, a band pass filter and an isolator. The temperature compensated control circuit using PTC and NTC thermistors is proposed to compensate the nonlinear attenuation characteristics of the MMIC attenuators over temperature. To obtain high step accuracy, the command word bits are modified correspondingly to the nonlinear attenuation characteristics of the MMIC attenuators versus control voltage. The test results show 32 dB settable gain control range, 16 dB output level control range, step accuracy of 1±0.3 dB and 1.2 dBp-p gain variation over temperature range in the operating frequency 19.8 GHz to 20.2 GHz.
- KSP Keywords
- Attenuation characteristics, Band-pass filter(BPF), Command Word(CW), Compensated control, Control Circuit, Control range, Gain Control, Gain variation, MMIC amplifiers, NTC thermistors, Operating frequency