Effects of Antenna Arrays on Broadband Signals.
AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING
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This paper develops a complex, baseband model for an adaptive array. The array is assumed to have N isotropic elements. Only two aspects of arrays are modeled spatial propagation delays and the weighting coefficients. The array model is used to determine the effects of arrays on wideband signals. The most important finding is that the output of the array consists of the input signal and its time derivatives. Each of these signal components is multiplied by a complex number that is a function of the array and signal parameters. Properties of these complex numbers are investigated. A four element linear array is used as a specific example to illustrate these properties. Two models of the weighting coefficients are analyzed to develope information about adaptive effects. These models are used to show how the array output is degraded by changing coefficients. Author
- Electrical and Electronic Equipment
- Radiofrequency Wave Propagation