dc.contributor.author |
Laue, Heinrich Edgar Arnold
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dc.contributor.author |
Du Plessis, W.P. (Warren Paul)
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dc.date.accessioned |
2020-02-25T08:02:39Z |
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dc.date.available |
2020-02-25T08:02:39Z |
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dc.date.issued |
2019-11 |
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dc.description.abstract |
Existing overlapped subarray techniques for beamforming arrays aim to realize flat-topped subarray radiation patterns, where pattern synthesis is constrained by the hardware configuration. A generalized framework for designing compressive arrays with unconstrained feed network responses has recently been proposed with promising results, but no hardware implementation has been proposed. A planar checkered network of directional couplers and fixed phase shifters is proposed for implementing arbitrary complex-valued feed network responses, including completely overlapped networks. An algorithm is proposed for realizing a desired response while minimizing the range of coupling ratios and phase shifts required. The technique is validated by a comparison to the standard 4 x 4 Butler matrix implementation, and its versatility illustrated by sharing an eight-element aperture between three independently designed nonscanning arrays. A manufactured microstrip 2 x 4 compressive array feed network achieves the desired aperture illuminations to within 0.6 dB and 5.2° at 3.15 GHz, and to within 1.4 dB and 10.3° across the impedance bandwidth of 4.5%. |
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dc.description.department |
Electrical, Electronic and Computer Engineering |
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dc.description.librarian |
hj2020 |
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dc.description.sponsorship |
The National Research Foundation of South Africa (NRF) under Grant 85845 |
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dc.description.uri |
http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=22 |
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dc.identifier.citation |
H.E.A. Laue and W.P. du Plessis, "A Checkered Network for Implementing Arbitrary Overlapped Feed Networks," in IEEE Transactions on Microwave Theory and Techniques, vol. 67, no. 11, pp. 4632-4640, Nov. 2019. |
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dc.identifier.issn |
0018-9480 (print) |
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dc.identifier.issn |
1557-9670 (online) |
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dc.identifier.other |
10.1109/TMTT.2019.2940223 |
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dc.identifier.uri |
http://hdl.handle.net/2263/73541 |
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dc.language.iso |
en |
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dc.publisher |
Institute of Electrical and Electronics Engineers |
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dc.rights |
© 2019 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. |
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dc.subject |
Subarrays |
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dc.subject |
Phased arrays |
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dc.subject |
Butler matrices |
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dc.subject |
Beam steering |
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dc.subject |
Antenna feed networks |
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dc.subject |
Antenna radiation patterns |
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dc.subject |
Array signal processing |
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dc.subject |
Matrix algebra |
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dc.subject |
Microstrip antenna arrays |
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dc.subject |
Planar antenna arrays |
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dc.subject |
Layout |
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dc.subject |
Couplers |
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dc.subject |
Couplings |
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dc.subject |
Phase shifters |
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dc.title |
A checkered network for implementing arbitrary overlapped feed networks |
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dc.type |
Postprint Article |
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