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Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024
    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Science & Engineering Crossword Puzzle
August 23rd, 2020

August 23rd's custom Science & Engineering themed crossword puzzle contains only only words (1,000s of them) from my custom-created lexicon related to engineering, science, mathematics, chemistry, physics, astronomy, etc. You will never find among the words names of politicians, mountain ranges, exotic foods or plants, movie stars, or anything of the sort. You might, however, find someone or something in the otherwise excluded list directly related to this puzzle's technology theme, such as Hedy Lamarr or the Bikini Atoll, respectively. The technically inclined cruciverbalists amongst us will appreciate the effort.

cruciverbalist: [noun]  cruci- ("cross") +‎ verbal ("words") +‎ -ist ("agent, person") -- A person who constructs crosswords.

Reproduction of this puzzle without the express permission of RF Cafe is prohibited.
acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words

Science & Engineering Crossword Puzzle for August 23, 2020 - RF Cafe


1. Opposite of set
5. La Place, Z-, and Fourier for example
11. Cambridge University _____, technical book publisher
15. A common battery cell size
16. Tie a bundle of wires together
17. Chemical symbol for silicon
18. Start frequency (abbr.)
19. Workplace safety group (abbr.)
20. Chemical symbol for europium
21. Electrical safety organization (abbr.)
22. Chemical symbol for antimony
24. Complex Instruction Set Computer
25. Chemical symbol for thallium
26. Logarithmic ratio (abbr.)
28. Communication between stations by reflecting the radio waves off of the ionosphere
30. Mate to an RX
31. Opposite of O.D.
32. Type of chart
33. Sound frequency in the human hearing range (abbr.)
35. Yard (abbr.)
36. Optical storage media
37. Opposite of a LO
38. Chemical symbol for praseodymium
39. Keyboard key
41. Boolean expression (pl.)
44. Used logic gates
46. Ham's code for "Does my frequency vary?"
47. CB slang for CB radio or antenna
49. Having a single polarity
52. Teflon (abbr.)
53. The highest numerical exponent describes this property of a polynomial
54. Chemical symbol for argon
55. Microprocessor vendor
56. Stock symbol for National Instruments
59. Filter type with maximally flat group delay
60. Weatherproof cover for a radar antenna
63. System for guiding aircraft (abbr.)
64. Mechanical engineering organization (abbr.)
66. Equipment
69. Special diode type that can be switched (abbr.)
70. Front edge of a wing (abbr.)
71. Chemical symbol for scandium
72. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.)
75. Unit of inductance (abbr.)
77. Chemical symbol for molybdenum
78. "Texting" (abbr.)
79. Chemical symbol for niobium
81. Unit of length (abbr.)
82. FCC Part 15 rules apply in this band (abbr.)
84. 1/000 of an amp (abbr.)
85. Schema for computer or device presentation to the operator (abbr.)
86. Move from cell to cell
87. European equivalent to the U.L.
88. Centimeter (abbr.)
89. Band between RF and BB
91. Upward force generated by an airfoil
93. Modulation type (abbr.)
94. Chemical symbol for terbium
96. Unit of length equal to 5.5 yards (pl.)
98. Cyanide (abbr.)
99. Creates an impenetrable physical barrier
100. 3-D geometrical figure that is symmetrical about each of three perpendicular axes, and has circular sections along one axis and elliptical sections along the others (pl.)
101. Graphics workshop software
1. Mathematical calculation of RF component string (2 wds.)
2. Chemical symbol for lanthanum
3. Metal mixture
4. Chemical symbol for radium
5. Verified proper functionality of a product
6. Chemical symbol for arsenic
7. Rechargeable battery type (abbr.)
8. The UK's equivalent of the FCC
9. Type of flip-flop
10. 60/40, PbSn, for example
11. Unit of inductance (abbr.)
12. Half of the diameter (pl.)
13. Chemical symbol for selenium
14. Radio receiver scheme which mixes a second frequency (LO) with the incoming radio signals
21. Unit of inductance (abbr.)
23. Armored cable type
25. Semiconductor and calculator company (abbr.)
27. Chemical symbol for beryllium
29. BlackBerry or Palm for example (abbr.)
32. It can follow an MS
34. Finite Element Analysis (abbr.)
38. Rate of a radar transmitter's output waveform (abbr.)
40. Chemical symbol for lawrencium
42. Current summing point (pl.)
43. Sudden, short-lived increase in voltage or current
44. Using a logical connection scheme for redundant power supplies
45. The highest level Amateur Radio license rating
46. Unit of liquid measure (abbr.)
48. Semiconductor On Insulator (abbr.)
50. Last stage in transmitter (abbr., pl.)
51. Type of logic gate (pl.)
52. Programmable Logic Device (abbr.)
57. Automated Test Equipment (abbr.)
58. Coefficient of temperature (abbr.)
61. Unix, Linux or Windows (abbr.)
62. Wire diameter unit (abbr.)
64. Automatic Calibration System (abbr.)
65. 60 seconds
67. Traditional term for a person who enjoys helping newcomers get started in ham radio - a mentor (pl.)
68. Radio frequency interference (abbr.)
71. The "S" in SOIC
73. Enrico _____, nuclear physicist
74. 10E-15 numerical prefix
76. High-speed circuit-switched data (abbr.)
78. Type of component package (abbr.)
80. Chemical symbol for bismuth
81. Unit of frequency (archaic, abbr.)
83. Unit of length (abbr.)
90. Chemical symbol for iron
92. Network department (abbr.)
93. Chemical symbol for aluminum
95. Chemical symbol for bismuth
97. 10E1 numerical prefix
98. Unlicensed FCC Part 95 realm for personal and business radio use (abbr.)
See solution below

2020 Crossword Puzzle Archive

Visit the Crossword Express website - RF CafeTake a well-deserved break and try your hand at some of these goodies. Every word in the RF Cafe crossword puzzles is specifically related to engineering, mathematics, and science. There are no generic backfill words like many other puzzles give you, so you'll never see a clue asking for the name of a movie star or a mountain on the Russia-China border.

All of these crossword puzzles were created using the fabulous Crossword Express (now called "Magnum Opus") software.

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Thanksgiving Day

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Science & Engineering Crossword Puzzle Solution for August 23, 2020 - RF Cafe

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