MCQOPTIONS
Bookmark
Saved Bookmarks
→
Microwave Engineering
→
Noise Microwave Circuits in Microwave Engineering
→
The skin depth at 1000 MHz, in comparison with tha..
1.
The skin depth at 1000 MHz, in comparison with that at 500 MHz is:
A.
2
B.
1/
C.
D.
1/2
Answer» D. 1/2
Show Answer
Discussion
No Comment Found
Post Comment
Related MCQs
(A) The TW tube which is a wideband microwave amplifier of the helix is used as a slow wave structure of the device.<br>(R) The phase velocity of the helix can be profiled along the length of the helix.
(A) The variables choosen for the equivalent circuit of a 2 port network in the microwave range of frequencies are travelling waves rather than total voltage and total currents. <br>(R) In microwave range equipment is not readily available to measure total voltage and total currents at the ports of the networks. Short and open circuits are difficult to achieve over a broad-band of frequencies and active devices frequently will not have stability for a short or open circuit.
(A) In some applications, the TM01 mode in circular waveguide is preferred to the TE01 mode or TE11 mode. <br>(R) TM01 mode not only overcomes the problem of rotation of polarisation in circular waveguide but also requires a smaller diameter.
(A) In an oscillation zone of reflex klystron an increase in the reflector voltage results in lighter oscillation frequency. <br>(R) Electron bunches pass through the interaction gap before the retarding field is at a maximum and an increased reflector voltage results in the induced current lagging in voltage.
A 75 ohm transmission line is first short terminated and the minima locations are noted. When the short is replaced by a resistive load R<sub>L</sub>, the minima locations are not altered and the VSWR is measured to be 3. What is the value of R<sub>L</sub>?
A square waveguide carries TE11 mode whose axial magnetic field is given by:<br><table><tr><td rowspan="2">H<sub>z</sub> = H<sub>0</sub>cos</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> x</center></td><td rowspan="2">cos</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> y</center></td><td rowspan="2">A/m</td></tr><tr><td style="text-align: center;"> <span style=" text-decoration: overline;">8</span></td><td style="text-align: center;"> <span style=" text-decoration: overline;">8</span></td></tr></table><br>Where the waveguide dimensions are in centimetres. What is the cut-off frequency of the mode?
Fig. shows five thin slots on the walls of a rectangular waveguide carrying TE10 mode. Which of these are radiating (R) and which are non-radiating (NR)?<br><table width="600px" border="0"><tr><td>R </td><td>NR</td></tr><tr><td>A. D, E </td><td>A, B, C </td></tr><tr><td>B. A, B, C </td><td>D, E</td></tr><tr><td>C. C, E</td><td>A, B, D </td></tr><tr><td>D. B, C, E </td><td>A, D</td></tr></table>
A microwave tube amplifier uses an axial magnetic field and a radial electric field. This is the: <br>
One of the following microwave diodes is suitable for very low-power oscillators only: <br>
A varactor diode may be useful at microwave frequencies (indicate the false answer): <br>
Reply to Comment
×
Name
*
Email
*
Comment
*
Submit Reply