cassegrain - 1 gs = 41.9db, sll= -19db, gdel = 35.9db, sll...
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![Page 1: Cassegrain - 1 Gs = 41.9dB, SLL= -19dB, Gdel = 35.9dB, SLL ...ael.chungbuk.ac.kr/AEL-results/design/ael(18)-w-band-seeker-design.pdf · Cassegrain - 1 Gs = 41.9dB, SLL= -19dB, Gdel](https://reader033.vdocuments.site/reader033/viewer/2022050505/5f96defe12fa577611578326/html5/thumbnails/1.jpg)
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Cassegrain - 1
Gs = 41.9dB, SLL= -19dB, Gdel = 35.9dB, SLL = -15dB
Dm = 160, Ds = 20, FmFs =100, Feed angle = 20 deg
1. Structure
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Five Deielectric Rod Feed
16.03.2018
1. Structure view
Dielectric: er=2.73, tand=0.001 (Rexolite)
z=0 port plane
Rod diameter
Square waveguide width
Full length of structure 43.43mm
Central dielectric rod length 24.50mm
Side dielectric rods length 18.60mm
Phase center z= 35.66 mm (7.77mm away from sum element tip toward square wg)
phase center-to-rod ground plane = 16.73
Waveguide’s size 2.1x2.1mm
Start diameter of the rod 2.1mm; end diameter of the rod 0.79mm
Full diameter 10.16mm
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2. Results
2.1 Farfield of the original size of the rods
2.2 Farfield of the feed with 50% rod’s length increased
Feed for Cassegrain-1
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2.3 Farfield with increased spacing between rods from 0.6mm to 1mm
Feed for Cassegrain-2
2.4 Farfield for not lofted dielectric rod in the waveguide
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2.5 Reflection coefficient
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2. Results Farfield results with sum farfield pattern of the feed system
Cross polar
Scan 9.6deg
![Page 8: Cassegrain - 1 Gs = 41.9dB, SLL= -19dB, Gdel = 35.9dB, SLL ...ael.chungbuk.ac.kr/AEL-results/design/ael(18)-w-band-seeker-design.pdf · Cassegrain - 1 Gs = 41.9dB, SLL= -19dB, Gdel](https://reader033.vdocuments.site/reader033/viewer/2022050505/5f96defe12fa577611578326/html5/thumbnails/8.jpg)
Cross-polar scan 9.6deg
∆-Elevation pattern
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Cross-polar of ∆-Elevation pattern
∆-Elevation pattern 9.6deg
![Page 10: Cassegrain - 1 Gs = 41.9dB, SLL= -19dB, Gdel = 35.9dB, SLL ...ael.chungbuk.ac.kr/AEL-results/design/ael(18)-w-band-seeker-design.pdf · Cassegrain - 1 Gs = 41.9dB, SLL= -19dB, Gdel](https://reader033.vdocuments.site/reader033/viewer/2022050505/5f96defe12fa577611578326/html5/thumbnails/10.jpg)
Cross-polar of ∆-Elevation pattern 9.6deg scan
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Cassegrain-2
Dm = 160, Ds = 24, FmFs =120, Feed angle = 22.5 deg