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Advanced Overloading Concepts in Waveguide Design: Training and Analysis Examples

Explore in-depth examples of waveguide design focusing on the concept of overloading. This training material covers various bandwidth enhancement techniques, including adjustments to slot configurations, center feeding, and frequency matching. Key designs include slotted waveguide antennas and traveling wave types, detailing performance metrics such as sidelobe levels (SLR), gains, and elevation beam steering. Analytical examples highlight the relationship between input and output admittance parameters, illustrating practical solutions for optimizing waveguide functionality.

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Advanced Overloading Concepts in Waveguide Design: Training and Analysis Examples

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  1. SWAN™ Training Design and Analysis Examples www.swan-soft.com

  2. Example 1: The conceptof overloading (1) Problem: bandwidth enlargement • Reduced number of slots for each section • Centre feeding • Overloading • Mismatching a centre frequency Solution: Ysub =1 / Yin Ysub =1 / Yin Yin Yin 12×1, WR90, f0=9.375GHz

  3. Example 1: The conceptof overloading (2) DESIGN ANALYSIS Yin=2.0 Yin=2.0 Ysub=0.5

  4. Example 1: The conceptof overloading (3) DESIGN ANALYSIS Yin=1.0 Yin=1.0 Ysub=1.0

  5. Example 1: The conceptof overloading (4) DESIGN ANALYSIS Yin=0.7 Yin=0.9 Ysub=1.111

  6. Example 1: The conceptof overloading (5) DESIGN ANALYSIS Yin=0.7 Yin=0.7 Ysub=1.428

  7. Example 2: Travelingwave – type 1 DESIGN 24×1, WR90, f0=9.375GHz, SLR=35dB, 0=88°

  8. Example 3: Travelingwave – type 2 DESIGN 24×1, WR90, f0=9.375GHz, SLR=35dB, L=0.4

  9. Example 4: Cosecant pattern (1) DESIGN 18×18, WR90, f0=9.375GHz, Centre feeding, E-plane: Tayor, SLR=35 dB, H-plane: Cosecant, Dmin/H=2, Dmax/H=30

  10. Example 4: Cosecant pattern (2)

  11. Example 5: BeamsteeringslottedSIW array DESIGN 12×12, SIW (a/p/d = 13/2/1 mm), f0=11.575GHz, Centre feeding, Beam pointing = 45° elevation

  12. Example 6: Slottedwaveguide BFN (1) DESIGN 8×12, WG (a/b=22.86/5.08 mm), f0=9.6GHz, Centre-fed, WG BFN divided into 2 sections, E/H-plane: Tayor, SLR=30 dB,

  13. Example 6: Slottedwaveguide BFN (2)

  14. Example 7: Arraydivided in sub-sections DESIGN 18×18, WG (a/b=22.86/85.08 mm), f0=9.6GHz, Centre-fed, WG BFN divided into 3 sections, Slotted waveguide divided into 3 sections, E/H-plane: Tayor, SLR=35 dB,

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