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Dissertation
Design of phased arrays for wide-bandwidth signals
Doctor of Philosophy (Ph.D.), Drexel University
Dec 1990
DOI:
https://doi.org/10.17918/00000806
Abstract
Many applications of weighted arrays require wide bandwidth signal processing. This work contributes to two of the major issues in phased-array design: beam steering and arbitrary pattern shaping for wide-bandwidth signals. Wide-bandwidth beam steering is approached through subarraying of a uniform linear array, a well known method of minimizing the number of true-time delayers in phased arrays. The available literature provides a systematic analysis only for identical contiguous subarrays. Arrays with unequally-sized subarrays are expected to have better performance in terms of grating lobes. Two architectures are analyzed and compared: (1) Sizes and locations of subarrays are chosen randomly. (2) Randomly-chosen subarray sizes with contiguous subarrays. Detection performance of the studied subarrayed architectures is analyzed, including receiver operating characteristics and expressions for the output signal-to-noise ratio (SNR), which relate the array parameters to a performance criterion. A wide bandwidth arbitrary pattern shaping technique is developed, based on imposing a spatial spectrum (signal environment) and adjusting the weights to minimize the output power or maximizing the output SNR. The imposed spatial spectrum is chosen to induce a specified radiation pattern. The result is a simple method, using closed-form expressions which guarantee the best approximation of a desired pattern.
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Details
- Title
- Design of phased arrays for wide-bandwidth signals
- Creators
- Amit Pinhas Goffer
- Contributors
- Moshe Kam (Advisor)Peter R. Herczfeld (Advisor)
- Awarding Institution
- Drexel University
- Degree Awarded
- Doctor of Philosophy (Ph.D.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xv, 131 pages
- Resource Type
- Dissertation
- Language
- English
- Academic Unit
- College of Engineering (1970-2026); Electrical (and Computer) Engineering [Historical]; Drexel University
- Other Identifier
- 991014970205504721