Discussion
In a hybrid TEE (Magic T), following statements are given :
1. \(S_{11}, S_{22}, S_{33}\) and \(S_{44}\) are non-zero.
2. All junctions are reciprocal i.e. \(S_{jk} = S_{kj}\)
3. \(S_{11}, S_{22}, S_{33}\) and \(S_{44}\) are zero.
4. \(S_{13} = -S_{23}, S_{14} = S_{24}, S_{43} = 0\) and \(S_{34} = 0\)
Which one of the following is true ?
Answer: C
Statements 2, 3 and 4 are correct. In an ideal magic tee all four ports are matched, so the diagonal scattering parameters \(S_{11}, S_{22}, S_{33}\) and \(S_{44}\) are zero; statement 3 is true and statement 1 is false. The junction is passive and reciprocal, so \(S_{jk} = S_{kj}\), which is statement 2. The H-arm and E-arm are isolated from each other, so \(S_{34} = S_{43} = 0\), and the side arms satisfy \(S_{13} = -S_{23}\) and \(S_{14} = S_{24}\), which is statement 4.
Any option that contains statement 1 claims the ports are not matched, which is wrong for the ideal device. Only option (C) leaves it out and includes 2, 3 and 4.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development