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- Title
Substrate Integrated Waveguide-Fed Tapered Slot Antenna With Smooth Performance Characteristics Over an Ultra-Wide Bandwidth.
- Authors
Locke, Lisa S.; Bornemann, Jens; Claude, Stéphane
- Abstract
We present an ultra-wide extended K-band (18 GHz - 30 GHz) planar linear tapered slot antenna (LTSA) design. From a parametric study involving eight designs, the best compromise LTSA is selected in terms of flattest gain and beam width and most symmetric beam width. The design is antipodal with alumina (&#949 = 10) substrate and fed with substrate integrated waveguide (SIW). Regular corrugations improve cross-polarization, input return loss, and gain. Numerical simulations use finite element analysis and time domain finite integration technique field solvers. The resulting design has half power beam widths (HPBW) of only ± 3.2° and ± 2.5° variation in frequency in the E- and H-planes, respectively. Cross-polarization levels at boresight are 35.7 dB at 18 GHz and 17.4 dB at 30 GHz, return loss is better than -11.7 dB and gain is 9.23 dB with ± 0.40 dB variation with frequency. Alternatively, for imaging systems requiring efficient illumination of a reflector or focusing elements, a second resulting design shows near-perfect beam symmetiy with HPBWE/HPBWH = 0.91. These two LTSAs are good candidates for dual-polarization focal plane array feed applications in astronomy imaging.
- Subjects
WAVEGUIDES; ULTRA-wideband antennas; SLOT antennas; ANTENNA design; IMAGING systems; FOCAL plane arrays sensors
- Publication
Applied Computational Electromagnetics Society Journal, 2013, Vol 28, Issue 5, p454
- ISSN
1054-4887
- Publication type
Article