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Transcript of Prof. Girish Kumar - nptel.ac.innptel.ac.in/courses/108101092/Week-10-Horn-Antennas-Part-2.pdf ·...
![Page 1: Prof. Girish Kumar - nptel.ac.innptel.ac.in/courses/108101092/Week-10-Horn-Antennas-Part-2.pdf · Horn Antennas Prof. Girish Kumar ... 2576 7436. Dual Mode Pyramidal Horn Antenna](https://reader031.fdocument.pub/reader031/viewer/2022013113/5aeb41477f8b9a585f8d63e2/html5/thumbnails/1.jpg)
Horn Antennas
Prof. Girish Kumar Electrical Engineering Department, IIT Bombay
(022) 2576 7436
![Page 2: Prof. Girish Kumar - nptel.ac.innptel.ac.in/courses/108101092/Week-10-Horn-Antennas-Part-2.pdf · Horn Antennas Prof. Girish Kumar ... 2576 7436. Dual Mode Pyramidal Horn Antenna](https://reader031.fdocument.pub/reader031/viewer/2022013113/5aeb41477f8b9a585f8d63e2/html5/thumbnails/2.jpg)
Dual Mode Pyramidal Horn Antenna
d1 d2 d
TE10 TE12/ TM12 Multimode
![Page 3: Prof. Girish Kumar - nptel.ac.innptel.ac.in/courses/108101092/Week-10-Horn-Antennas-Part-2.pdf · Horn Antennas Prof. Girish Kumar ... 2576 7436. Dual Mode Pyramidal Horn Antenna](https://reader031.fdocument.pub/reader031/viewer/2022013113/5aeb41477f8b9a585f8d63e2/html5/thumbnails/3.jpg)
Dual Mode Conical Horn Antenna
l
d=2a d=2b
d=2a0
TE11 TM11 Dual Mode
![Page 4: Prof. Girish Kumar - nptel.ac.innptel.ac.in/courses/108101092/Week-10-Horn-Antennas-Part-2.pdf · Horn Antennas Prof. Girish Kumar ... 2576 7436. Dual Mode Pyramidal Horn Antenna](https://reader031.fdocument.pub/reader031/viewer/2022013113/5aeb41477f8b9a585f8d63e2/html5/thumbnails/4.jpg)
Step-Less Dual Mode Conical Horn
2a 2a0
l
θf
![Page 5: Prof. Girish Kumar - nptel.ac.innptel.ac.in/courses/108101092/Week-10-Horn-Antennas-Part-2.pdf · Horn Antennas Prof. Girish Kumar ... 2576 7436. Dual Mode Pyramidal Horn Antenna](https://reader031.fdocument.pub/reader031/viewer/2022013113/5aeb41477f8b9a585f8d63e2/html5/thumbnails/5.jpg)
Circular Corrugated Horn Antenna
![Page 6: Prof. Girish Kumar - nptel.ac.innptel.ac.in/courses/108101092/Week-10-Horn-Antennas-Part-2.pdf · Horn Antennas Prof. Girish Kumar ... 2576 7436. Dual Mode Pyramidal Horn Antenna](https://reader031.fdocument.pub/reader031/viewer/2022013113/5aeb41477f8b9a585f8d63e2/html5/thumbnails/6.jpg)
Corrugated Surface
Typical Values of d, No. of Teeth, w and t:
Depth of the gap (d) = 0.25λ to 0.5λ
No. of Teeth (n) = 4 to 10 per λ
Width of the gap (w) = 0.05λ to 0.2λ
Teeth thickness (t) = 0.02λ to 0.1λ
![Page 7: Prof. Girish Kumar - nptel.ac.innptel.ac.in/courses/108101092/Week-10-Horn-Antennas-Part-2.pdf · Horn Antennas Prof. Girish Kumar ... 2576 7436. Dual Mode Pyramidal Horn Antenna](https://reader031.fdocument.pub/reader031/viewer/2022013113/5aeb41477f8b9a585f8d63e2/html5/thumbnails/7.jpg)
Corrugated Conical Horn
![Page 8: Prof. Girish Kumar - nptel.ac.innptel.ac.in/courses/108101092/Week-10-Horn-Antennas-Part-2.pdf · Horn Antennas Prof. Girish Kumar ... 2576 7436. Dual Mode Pyramidal Horn Antenna](https://reader031.fdocument.pub/reader031/viewer/2022013113/5aeb41477f8b9a585f8d63e2/html5/thumbnails/8.jpg)
Multimode Horn Antenna
TE10 and TE01: Excited with Equal Amplitude and
Phase in a square waveguide
![Page 9: Prof. Girish Kumar - nptel.ac.innptel.ac.in/courses/108101092/Week-10-Horn-Antennas-Part-2.pdf · Horn Antennas Prof. Girish Kumar ... 2576 7436. Dual Mode Pyramidal Horn Antenna](https://reader031.fdocument.pub/reader031/viewer/2022013113/5aeb41477f8b9a585f8d63e2/html5/thumbnails/9.jpg)
Circular Waveguide with Flange
Circular waveguide
with flange and 4
chokes for wide-beam-
width high-efficiency
feed of low F/D
parabolic reflectors.
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Broadband Exponentially Tapered Horn
A
B
Launcher
C
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Broadband Dual Ridged Horn
![Page 12: Prof. Girish Kumar - nptel.ac.innptel.ac.in/courses/108101092/Week-10-Horn-Antennas-Part-2.pdf · Horn Antennas Prof. Girish Kumar ... 2576 7436. Dual Mode Pyramidal Horn Antenna](https://reader031.fdocument.pub/reader031/viewer/2022013113/5aeb41477f8b9a585f8d63e2/html5/thumbnails/12.jpg)
Compact Aperture Matched Horn Antenna
Exponential Ridges are used to increase bandwidth.
Aperture matching at the end is done to improve
VSWR, reduce scattering and increase the gain.