Top 150+ Solved Radiation and Microwave Techniques MCQ Questions Answer
Q. _________ and __________ contribute to the impedance of a transmission line in thelumped element representation.
a. resistor, inductor
b. resistor, capacitor
c. capacitor, inductor
d. transistor, capacitor
Q. Characteristic impedance of a transmission line is:
a. impedance z of a transmission line
b. impedance which is a constant at any point on the transmission line
c. reciprocal of admittance of a transmission line
d. none of the mentioned
Q. The major advantage of single stub tuning over other impedance matchingtechniques is:
a. lumped elements are avoided
b. it can be fabricated as a part of transmission line media
c. it involves two adjustable parameters
d. all of the mentioned
Q. Shunt stubs are preferred for:
a. strip and microstrip lines
b. coplanar waveguides
c. circular waveguide
d. circulators
Q. In shunt stub matching, the key parameter used for matching is:
a. admittance of the line at a point
b. admittance of the load
c. impedance of the stub
d. impedance of the load
Q. For co-axial lines and waveguides, ________ is more preferred.
a. open circuited stub
b. short circuited stub
c. slotted section
d. co-axial lines cannot be impedance matched
Q. The modes of wave propagation that a rectangular waveguide can support are:
a. tem, te, modes
b. tem,tm, te modes
c. tem, tm modes
d. te,tm modes
Q. In TM mode, if the direction of wave propagation is in ‘z’ direction, then:
a. hz=0
b. ez=0
c. ey=0
d. hy=0
Q. S parameters are expressed as a ratio of:
a. voltage and current
b. impedance at different ports
c. indecent and the reflected voltage waves
d. none of the mentioned
Q. Ferrite isolators are ____ port microwave devices.
a. two
b. three
c. four
d. none of the mentioned
Q. Directional coupler for waveguide are characterized by
a. insertion loss
b. coupling specification
c. directivity
d. all of the above
Q. A “circulator” is a device that:
a. rotates signal polarity in a waveguide
b. allows a signal to pass in one direction only
c. separates signals among various ports
d. prevents microwaves from being “trapped” in a waveguide
Q. Power dividers and couplers are ______ microwave components used for powerdivision or power combining.
a. passive
b. active
c. linear
d. non linear
Q. T- junction is an example for:
a. 2 port network
b. 3 port network
c. 4 port network
d. none of the mentioned