Appendix A: Circular Wave guide sizes
Appendix B: Rectangular Wave guide sizes
RayCalc - Antenna
Raytech’s Antenna-Calc is your all-in-one toolset for antenna design and validation. Instantly compute horn geometries, conical & pyramidal horn gains, scalar horn beamwidths, RMS surface loss, far-field distances, and large aperture performance. Whether you're prototyping, validating with simulations, or designing for millimeter-wave systems—get precise results with intuitive inputs and clear, actionable outputs.
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| Optimum Gain Pyramidal Horn (max gain for a given length)
(For sufficiently large horns, See Figure below for discrepancy) |
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| Gain (dB) | Freq (GHz) | WG: a (inch) | WG: b (inch) | A (inch) | B (inch) | H (inch) | AngA (deg) | AngB (deg) | HPBW E (dB) | HPBW H (dB) |
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 The calculator above is accurate for sufficiently large horns. Note the left figure for the discrepancy between calculator vs HFSS |
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See plot to right. |
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| Scalar Horn (HE11) | ||||||||
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| Freq (GHz) | A (inch) | D (inch) | H (inch) | 3dB BW (deg) | 10dB BW (deg) | 20dB BW (deg) | Gain (dB) | Ang (deg) |
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