MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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: |
| A. | 70.7 Ω |
| B. | 50 Ω |
| C. | 100 Ω |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 2. |
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. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The curve of S14 for a branch-line coupler is similar to that of the S11 curve of the branch-line coupler. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
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: |
| A. | 70.7 Ω |
| B. | 35.4 Ω |
| C. | 50 Ω |
| D. | 100 Ω |
| Answer» C. 50 Ω | |
| 5. |
The S matrix of a Quadrature hybrid is of size 4×4 and the diagonal elements of a matched coupler are all: |
| A. | 1 |
| B. | 0 |
| C. | Cannot be determined |
| D. | None of the mentioned |
| Answer» C. Cannot be determined | |
| 6. |
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.?$# |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
If_the_branch-line_impedance_of_a_coupler_designed_to_operate_at_1_GHz_is_70.70_Ω,_then_the_characteristic_impedance_of_the_material_of_the_arms_of_the_branch-line_coupler_is:$# |
| A. | 70.7 Ω |
| B. | 50 Ω |
| C. | 100 Ω |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 8. |
The curve of S14 for a branch-line coupler is similar to that of the S11 curve of the branch-line coupler? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
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. | True |
| B. | False |
| Answer» C. | |
| 10. |
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:$ |
| A. | 70.7 Ω |
| B. | 35.4 Ω |
| C. | 50 Ω |
| D. | 100 Ω |
| Answer» C. 50 ‚âà√≠¬¨¬© | |
| 11. |
Branch-line couplers are preferably made using waveguides so as to obtain high gain and simple construction. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
A branch-line coupler is an asymmetric coupler. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
The S matrix of a Quadrature hybrid is of size 4√ó4 and the diagonal elements of a matched coupler are all:$ |
| A. | 1 |
| B. | 0 |
| C. | Cannot be determined |
| D. | None of the mentioned |
| Answer» C. Cannot be determined | |
| 14. |
Branch-line couplers are also popular as Quadrature hybrids. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
Quadrature hybrids are those couplers which are: |
| A. | 3 dB couplers |
| B. | Directional couplers |
| C. | They have a 90<sup>0</sup> phase difference between signals in through and coupled arms. |
| D. | All of the mentioned |
| Answer» E. | |