Wr-90 x band waveguide horn antenna, 18DB gain, rugged

Wr-90 x band waveguide horn antenna, 18DB gain, rugged

WR-90 waveguide feed horn antenna.
0.950 x 0.400 inches inside dimensions.
Estimated gain at 10GHz based on dimensions is 18dB (see below).
Rugged construction, excellent condition.
Estimated Gain with measured dimensions:
(From Antenna Engineering Handbook, Johnson, Section 15.2 )
RowBox[{RowBox[{RowBox[{λ, =, 0.03}], ;, , RowBox[{a, , =, , 0.1054}], ;, RowBox[{b, = ... dimensions in meters *)}] s = b^2/(8 * λ * le) ; 16 * s t = a^2/(8 * λ * lh) ; 16 * t
RowBox[{RowBox[{LossE, =, RowBox[{RowBox[{(, RowBox[{0.541, +, 0.374}], )}], /, 2}]}], ;, , RowBox[{LossH, =, 0.967}], ;}]
RowBox[{Gain, , =, RowBox[{10.08, +, 10 * Log[10, (a * b)/λ^2], -, LossE, -, LossH, }]}]
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