CROSSWORD PUZZLE 1:
ACROSS
1.
Geometrical term for any four sided figure
10. Morse Code for "from"
12. ELI the ICE ___
13. Chemical symbol for lawrencium
14. Lowest power level capable of being demodulated (abbr.)
15. 10 decibels
16. Chemical symbol for arsenic
18. Automatic Testing, Evaluation &
Reporting (abbr.)
20. Heatsink feature
22. Front edge of a wing (abbr.)
23. Display type
24. Web's most popular RF site (2 ltrs. +
1 wd.)
26. A common RS-232 serial bus command (abbr.)
27. Infrared (abbr.)
28. A common battery cell size
29. European equivalent to the U.L.
30. Unit of liquid measure (abbr.)
31. Asynchronous Transfer Mode (abbr.)
DOWN
1. Ratio of reactance to resistance (2 wds.)
2. Modulation type (abbr.)
3. Type of data conversion device (abbr.)
4. Chemical symbol for radon
5. Stock symbol for Linear Technologies
6. Length times width
7. 1/6 inch printer's measure
8. Radio Direction Finding (abbr.)
9. Application Specific Integrated Circuit
(abbr.)
10. Keyboard key
11. The "E" in EMF
17. Special diode type that can be switched
(abbr.)
18. Colorado Springs military school (abbr.)
19. Part of this website's title
21. Negative temperature coefficient (abbr.)
24. Increases voltage linearly
25. Engineering Change Order (abbr.)
28. Test document for verifying proper function (abbr.)
30. Ham's code for "Unable to copy you."
32. A measure of receiver quality (abbr.)

32. Chemical symbol for nobelium
34. Signal-to-noise ratio (abbr.)
35. Chemical symbol for ytterbium
37. Min-to-max voltage of a waveform
(abbr.)
38. Sound frequency in the human hearing range (abbr.)
39. Chemical symbol for chlorine
41. Chemical symbol for polonium
42. Modem encoding method (abbr.)
43. Chemical symbol for gadolinium
44. Type of logic gate
45. PC follower
47. Chemical symbol for lanthanum
48. Voice-operated transmit (abbr.)
49. Part of a FOR loop
50. Base 16 number system (abbr.)
52. Larger moon of Mars
56. Logic family
57. Test point (abbr.)
59. The UK's largest defense electronics contractor (abbr.)
61. Electronic Variable Optical
Attenuator (abbr.)
63. Ratio of circumference to diameter
64. Ovenized crystal oscillator (abbr.)
65. Ultra High Voltage (abbr.)
67. Chemical symbol for erbium
68. Innovative Power Products, Holbrook,
NY (abbr.)
70. Chemical symbol for rubidium
71. Perform a calculus function
ANSWER:
33. Voltage-controlled crystal oscillator
(abbr., pl.)
36. Base Station Transceivers (abbr.)
38. Analog-to-Digital (abbr.)
40. Shorthand for liquid oxygen
43. Key feature in a high level overvoltage protection device
46. One of the Ws in WWW
48. Voice of America
49. ___/IP scheme for networked connectivity
51. 10-Gb Attachment Units Interface
53. Chemical symbol for helium
54. Radio term for indicating the end of a transmission segment
55. Drill a hole
58. Substrate for mounting components
(abbr.)
60. 30 GHz to 300 GHz
62. Printer output resolution unit (abbr.)
66. 300 Hz to 3 kHz
68. Network department (abbr.)
69. Last stage in a transmitter (abbr.)

CROSSWORD PUZZLE 2:

ACROSS DOWN
1.
Web's most popular RF site (2 ltrs. +
1 wd.)
4. Measure of how quickly an electron can move through a metal or semiconductor
8. Using the moon as a passive reflector to establish a signal path; moonbounce (abbr.)
10. System for guiding aircraft (abbr.)
11. Balanced-to-unbalanced device
13. Electronics components & batteries supplier based in Japan
15. Gigantic star in Cetus
17. SIgnal to Noise And Distortion
(abbr.)
18. Chemical symbol for beryllium
19. A three-terminal power semiconductor device noted for high efficiency and fast switching (abbr.)
1. Move from cell to cell
2. Brightest star in the Aquila constellation
3. BS__ - the degree held by many RF Cafe visitors
4. A type of average
5. Five-bit digital code used in teleprinter application
6. Local Oscillator (abbr.)
7. Time division duplex (abbr.)
9. 1E6 bits per second
10. Chemical symbol for argon
12. Ties a bundle of wires together
13. Finite Element Analysis (abbr.)
14. Unit of electromotive force (pl.)
16. Things in a bill of material
17. Chemical symbol for antimony
18. Early predecessor to an online forum
(abbr.)
20. Opamp circuit for converting an

21. Chemical symbol for cobalt
22. Stock symbol for Boeing
23. Unit of inductance
25. Electron beam particle (pl.)
27. Chemical symbol for holmium
28. Electromotive force (abbr.)
29. The "R" in DRC in substrate layout
32. 1E6 nanoseconds
33. Chemical symbol for tantalum
34. Chemical symbol for radium
35. An abbreviation for "transmitter"
37. Commercial Off-the-Shelf
38. European equivalent to the U.L.
40. Shorthand for oxygen
41. Chemical symbol for chlorine
42. One cutoff frequency specification for a bandpass filter
43. ___-AZIMUTH telescope mount
44. Boob tube (abbr.)
45. One port on a FET
47. Quickly changing portions of waveforms
49. Chemical symbol for terbium
50. Chemical symbol for rubidium
51. Parameter that is a figure of merit for receiver performance in presence of multiple signals (abbr.)
53. Opposite of a LO
54. PCB interconnect
56. International Amateur Radio
Union (abbr.)
59. Crystal filter type (abbr.)
61. Light rays
62. Digital voltmeter (abbr.)
64. Peak envelope power (abbr.)
66. Suppresses an oscillation
67. The "D" in DC inductance into a capacitance, and vice versa
23. Pliers-like surgical tool used in the electronics lab (pl.)
24. A measure of receiver quality (abbr.)
25. Radio navigation reference signal
26. Cable covered by strong jacket
30. Chemical symbol for lawrencium
31. Chemical symbol for bromine
33. Part of a FOR loop
36. Mate to an RX
37. Centimeter (abbr.)
39. Modern battlefield technique (abbr.)
41. Opposite of set
42. Constellation : The scales
43. Chemical symbol for silver
45. Antenna gain unit (abbr.)
46. ______ House, technical book publisher
48. Low impedance amplifier stage that boosts power
49. Code for a type of electrical wire insulation (abbr.)
51. Society of Civil and Structural Engineers
(abbr.)
52. Chemical symbol for iron
55. Volts divided by resistance
57. Modulation type (abbr.)
58. Universal Asynchronous
Transmit/Receive (abbr.)
60. Arithmetic Logic Unit (abbr.)
63. Army-Navy specification prefix
65. Chemical symbol for palladium
ANSWER:

1.Microwave resonators are used in
A.
microwave oscillators
B.
microwave narrow band amplifier
C.
microwave frequency metres
D.
all of the above
ANS: D
2.In a klystron amplifier the input cavity is called
A.
buncher
B.
catcher
C.
Pierce gun
D.
collector
ANS:A
3.In a directional coupler
A.
isolation (dB) equals coupling plus directivity
B.
coupling (dB) equals isolation plus directivity
C.
directivity (dB) equals isolation plus coupling
D.
isolation (dB) equals (coupling) (directivity)
ANS:A
4.In a three cavity klystron amplifier, the oscillations are excited in
A.
input cavity
B.
output cavity
C.
intermediate cavity
D.
both (a) and (b)
ANS:C
5.Which of the following devices uses a helix?
A.
Klystron amplifier
B.
Klystron oscillator
C.
TWT
D.
Both (a) and (b)
ANS:C
6.The diagram to show distance time history of electrons in klystron amplifier is called
A.
apple gate diagram
B.
asynchronous diagram
C.
bunching diagram
D.
velocity modulation diagram
ANS:A

. 7.The action of backward wave oscillator is similar to that of
A.
klystron amplifier
B.
reflex klystron oscillator
C.
TWT
D.
magnetron
ANS:C
8.Which of the following devices uses a slow wave structure?
A.
Klystron two cavity amplifier
B.
Klystron multicavity amplifier
C.
Reflex klystron oscillator
D.
TWT
ANS:D
9.A waveguide section in a microwave circuit acts as
A.
LP filter
B.
Bandpass filter
C.
HP filter
D.
Band stop filter
ANS:C
10.In a klystron amplifier dc electron velocity is v
0
and dc electron charge density is r
0
the dc beam current is
A.
r
0 v
0
B.
r
0
/ v
0
C.
v
0
/ r
0
D.
( v
0
/ r
0
)
2
ANS:A
11.
Assertion (A): Gunn diode is a transferred electron device.
Reason (R): A Gunn oscillator uses the phenomenon of transferred electron effect.
A.
Both A and R are correct and R is correct explanation of A
B.
Both A and R are correct but R is not correct explanation of A
C.
A is correct but R is wrong
D.
A is wrong but R is correct
ANS:B
12.A reflex klystron oscillator uses
A.
one cavity resonator
B.
two cavity resonators
C.
three cavity resonators
D.
none of the above
ANS:A

TRUE OR FALSE:
1.Impedance level of Impatt diodes is generally lower than that of Gunn diodes
A.
True B.
False
ANS:A
2.In a multicavity klystron amplifier the signal to be amplified develops an ac voltage of signal frequency across the gap in buncher cavity
A.
True
ANS:A
B.
False
3.Reflex klystron oscillator is essentially a low power device
A.
True B.
False
ANS:A
4.In Reflex Klystron oscillator the focussing electrode is at a high potential
A.
True B.
False
ANS:B
5.The bunching action which occurs in multicavity klystron amplifier can be represented by
Applegate diagram
A.
True B.
False
ANS:A