Branch-line couplers are also popular as Quadrature hybrids.

1.	Branch-line couplers are also popular as Quadrature hybrids.
A.	True
B.	False
Answer» B. False

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If the branch-line impedance of a coupler designed to operate at 1 GHz is 70.70 Ω, then the characteristic impedance of the material of the arms of the branch-line coupler is:
S12 and S13 curves for branch-line couplers are almost a straight line parallel to X –axis. Both the curves are similar and follow same path.
The curve of S14 for a branch-line coupler is similar to that of the S11 curve of the branch-line coupler.
A 50 Ω branch-line Quadrature hybrid has to be designed to operate over a range of frequencies. The branch-line impedance of this coupler so designed is:
The S matrix of a Quadrature hybrid is of size 4×4 and the diagonal elements of a matched coupler are all:
S12_AND_S13_CURVES_FOR_BRANCH-LINE_COUPLERS_ARE_ALMOST_A_STRAIGHT_LINE_PARALLEL_TO_X_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬®AXIS._BOTH_THE_CURVES_ARE_SIMILAR_AND_FOLLOW_SAME_PATH.?$#
If_the_branch-line_impedance_of_a_coupler_designed_to_operate_at_1_GHz_is_70.70_‚âà√≠¬¨¬©,_then_the_characteristic_impedance_of_the_material_of_the_arms_of_the_branch-line_coupler_is:$#
The curve of S14 for a branch-line coupler is similar to that of the S11 curve of the branch-line coupler?
The plot S11 v/s frequency for a branch-line coupler has a straight line characteristic for a wide range of frequency around the designed frequency range.
A 50 ‚âà√≠¬¨¬© branch-line Quadrature hybrid has to be designed to operate over a range of frequencies. The branch-line impedance of this coupler so designed is:$

Branch-line couplers are also popular as Quadrature hybrids.

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