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This week's crossword puzzle, as with all RF Cafe puzzles, uses only words pertaining to engineering, science, mathematics, mechanics, chemistry,
astronomy, etc. You will never find a reference to some obscure geological feature or city, or be asked to recall the name of some numbnut
movie star or fashion designer. You will, however, need to know the name of a famous RF filter design software author. Enjoy!
Reproduction of this puzzle without the express permission of RF Cafe is prohibited.
acr. = acronym, abbr. = abbreviation,
pl. = plural, wds. = words
1. _______ ____ - popular author on RF filter design (first & last name)
9. Chemical
symbol for francium
10. Infrared (abbr.)
11. Unit of inductance (abbr.)
12. Special diode type that can be switched (abbr.)
14. Component supplier
16. Mass unit (abbr., pl.)
18. Nearest and furthest points to the center of gravitational attraction for a
body in orbit (pl.)
21. PC follower
23. Word used in describing 2-D and 3-D object dimensions; i.e., 10 mm __ 25 mm
24. Cooling
devices
25. Image storage format
28. Type of reconfigurable memory (abbr.)
30. Key feature in a high level overvoltage protection
device
31. Antenna (abbr.)
33. Effective frontal area presented to a microwave interrogation system (abbr.)
35. Point that is
the same distance from every point on the circumference of a circle (British spelling)
37. Filter type that blocks frequencies in a
specified band (abbr.)
38. Encased in a protective covering
40. Amateur radio enthusiast
41. A common battery cell size
43.
Its chemical symbol is Fe
44. Type of flip-flop
45. Trigonometric function equal to the ratio between the side adjacent to a given
angle, and the hypotenuse
46. Miniature threaded RF connector
49. Voltage-current phase mnemonic
50. Modulation technique that
varies the width of pulses in a train (abbr.)
52. The gaseous state of water
55. Precipitates
57. Islands On The Air (Ham term)
58. BS__ - the degree held by many RF Cafe visitors
60. PC follower
61. Majority carriers in p-type material
62. Direct Memory
Access (abbr.)
64. Unit of conductance
66. CDMA Development Group (abbr.)
68. Chemical symbol for cobalt
69. Chemical symbol
for lanthanum
70. Chemical symbol for beryllium
71. Frequency-selective with high rate of out-of-band attenuation (2 wds.) |
1. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.)
2. Chemical symbol
for argon
3. Number by which another number is divided
4. Amateur Radio Emergency Service (abbr.)
5. Mr. Boltzmann's first name
6. Greek letter
7. Chemical symbol for einsteinium
8. Abbreviation for acknowledge (also a common word used by Bill the Cat)
13.
Computer monitor cable type (abbr.)
15. Increased voltage linearly
17. Overall functional units
19. International phonetic alphabet
letter "P"
20. Signal-to-noise ratio (abbr.)
22. Chemical symbol for tantalum
26. Radio navigation systems
27. Radio signal
route (pl.)
29. Unit of frequency (archaic, abbr.)
32. Gun safety and education organization (abbr.)
34. Threaded fastener (pl.)
36. Like a crystal
37. Beginners' All-purpose Symbolic Instruction Code
39. Local Oscillator (abbr.)
42. Online service (abbr.)
43. Opposites of outputs
44. A number that can be expressed as a/b, where a, b are integers
47. 1E6 nanoseconds
48. The "R" in
BER
51. 'Shooting star'
53. End of Life (abbr.)
54. Network controller
56. A common battery cell size
59. Science of assuring
operation amid dense EM background noise (abbr.)
61. Slang for helicopter
63. Type of data conversion device (abbr.)
65. Current-voltage
phase mnemonic
67. Chemical symbol for gallium
70. Chemical symbol for beryllium |
See solution below
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