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Broadband Double-Ridged Horn

Broadband Double-Ridged Horn. 1-18 GHz. Introduction. CEM Challenge Oblique and curved surfaces Tiny feed section Large overall dimension Broadband 1 - 18 GHz. Geometry. f = 1 - 18 GHz. 280 mm ( diameter 17  at 18 GHz). Feeding and Mesh. Meshing 4 GHz 18 GHz

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Broadband Double-Ridged Horn

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  1. Broadband Double-Ridged Horn 1-18 GHz

  2. Introduction • CEM Challenge • Oblique and curved surfaces • Tiny feed section • Large overall dimension • Broadband 1-18 GHz

  3. Geometry f = 1-18 GHz 280 mm (diameter 17  at 18 GHz)

  4. Feeding and Mesh Meshing 4 GHz18 GHz outer boundaryl / 10 l / 5 antenna surfacel / 10 l / 8 coaxial feedl / 110 l / 25

  5. Near Field f = 7 GHz f = 12 GHz

  6. FVTD Meas. 0 0 0 0 0 0 -15 -15 -15 -15 -15 -15 -30 -30 -30 -30 -30 -30 -180 -180 -180 -180 -180 -180 -90 -90 -90 -90 -90 -90 0 0 0 0 0 0 90 90 90 90 90 90 180 180 180 180 180 180 Far Field f= 7 GHz f= 2 GHz f= 12 GHz E-Plane H-Plane

  7. 3D Radiation Pattern Simulated far-field patterns f = 1-18 GHz

  8. 1 2 3 4 5 4 FVTD max. gain 2 1 3 5 Broadside Gain 16 12 8 4 0 Measured Gain (dB) FVTD Frequency (GHz)

  9. FVTD Meas. 0 -5 -10 -15 -20 -25 -30 -35 -40 2 4 6 8 10 12 14 16 18 Return Loss S11 (dB) Frequency (GHz)

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