1. Theoretical Approach to Estimate Intermodulations in Wideband Active Transmit Phase-Array Antennas.
- Author
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Johari, Ehsan, Karkhaneh, Haleh, and Ghorbani, Ayaz
- Subjects
- *
PHASED array antennas , *ESTIMATION theory , *BROADBAND communication systems , *NONLINEAR statistical models , *ELECTRONIC amplifiers , *ELECTRONIC modulation , *ELECTRIC power consumption - Abstract
In this article, an active phased-array multi-beam antenna model including the nonlinear model of the amplifier is developed and validated by experimental data. An amplifier model with frequency-dependent parameters is considered. To investigate nonlinearity effects in a phased-array antenna, a two-beam S-band array is analyzed, and the results of the proposed method are compared with measured data. It is shown that the presented model is able to precisely predict the intermodulation products with an accuracy of 1 dB. Therefore, the model can be used as a tool to accurately predict the intermodulation patterns for multi-beam satellite array applications, avoiding excessive system margin and reducing DC power consumption. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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