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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 typing 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 Theme Crossword Puzzle
August 22, 2021

This Science Theme crossword puzzle for August 22nd, 2021, contains only words and clues related to engineering, mathematics, chemistry, physics, and other technical words. As always, this crossword contains no names of politicians, mountain ranges, exotic foods or plants, movie stars, or anything of the sort unless it/he/she is related to this puzzle's technology theme (e.g., Hedy Lamarr or the Bikini Atoll). The technically inclined cruciverbalists amongst us will appreciate the effort. Enjoy!

Reproduction of this puzzle without the express permission of RF Cafe is prohibited.

acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words

Science Theme Crossword Puzzle for August 22nd, 2021 - RF Cafe

1. Diode type whose capacitance is controlled by a reverse bias (pl.)
7. Ham's code for "Take over as net control station."
10. Numerical basis for decibels (abbr.)
13. This crossword puzzle's theme
18. Switch position
19. Data transmission pathway
20. Total radiated power (abbr.)
21. 10E1 numerical prefix
22. Greek letter (micro)
23. Chemical symbol for aluminum
24. Person responsible for program spending (abbr.)
27. Electronics Industry Association (abbr.)
29. International Reply Coupon (abbr.)
31. Precision landing system (abbr.)
34. Unix, Linux or Windows (abbr.)
35. Lowest power level capable of being demodulated (abbr.)
37. Automatic network analyzer (abbr.)
39. Jack ______, "Microwaves & RF" magazine editor (c2014)
41. SIP x 2
43. Chemical symbol for europium
44. The "F" in EMF
46. Amateur Radio Association (abbr.)
48. Network department (abbr.)
49. Electronics manufacturer with "meatball" logo
50. 1/000 of an amp (abbr.)
52. The "S" in SOIC
53. Finite Element Analysis (abbr.)
55. Aerodynamic opposition to thrust
58. 30 kHz to 300 kHz
59. Last stage in a transmitter (abbr.)
61. National Television System Committee (abbr.)
64. Stock symbol for Lockheed Martin
66. Type of secondary radar system (abbr.)
67. Part of CAD
69. An ellipse has two of them
70. Akin to an EE, CE, AE, etc.
71. ampere-hour (abbr.)
73. NIST radio station (broadcasts time signals)
74. Maximum voltages in a waveform
76. FCC Part 15 rules apply in this band (abbr.)
78. Ham abbreviation indicating contacts with all major land masses
80. Current summing point
81. JavaScript (abbr.)
82. Unit of time (abbr.)
83. Move in a raster pattern
85. Add two or more inputs
87. Sharp bends in I-V curves
88. Decimeter (abbr.)
90. A common battery cell size
91. Chemical symbol for iron
93. Government program to bring electricity to farms (abbr.)
95. The Brits call them valves
97. PC follower
99. Compressed image file format
101. Frequency band at high end of audio spectrum
103. Multiplexer (abbr.)
104. ___-back transformer
105. 1e3 μV
106. Nordic Mobile Telephone
108. Circuit element connecting PCB layers
109. User Datagram Protocol
112. Using the moon as a passive reflector to establish a signal path; moonbounce (abbr.)
113. Filter type that blocks lower frequencies (abbr.)
115. Schema for computer or device presentation to the operator (abbr.)
116. Greek letter (micro)
118. Heatsink feature
120. Mate to a bolt
122. A BPF specification (abbr.)
123. Small motored tool for model drilling, grinding, shaping, etc. (pl.)
124. Governmental agency that monitors pollution (abbr.)
125. Type of logic gate
126. Mr. Marconi's first name
1. Volt-ohmmeter (abbr.)
2. Army-Navy specification prefix
3. Positive electrode
4. Chemical symbol for terbium
5. One port of an amplifier
6. Type of flip-flop
7. Unit of liquid measure (abbr.)
8. The design component of total product cost (abbr.)
9. Started as HPIB
11. Opposite of I.D.
12. Ratio of output to input power, voltage, current, light, etc. (pl.)
13. Miniature RF connector
14. Chemical symbol for copper
15. European Telecommunications Standards Institute (abbr.)
16. Chemical symbol for calcium
17. Voltage-current phase mnemonic
24. Alloy of copper and nickel used in some thermocouples
25. Chemical symbol for arsenic
26. Plug-in for computer bus
28. Flash caused by an electric current ionizing a gas or vapor
30. One component of a complex number (abbr.)
32. Front edge of a wing (abbr.)
33. __________ approximation DAC
35. 1/000 of an inch
36. Below ELF
38. 1e-6 mA
40. Refers to the IEEE802.11 networks (abbr.)
41. Morse Code for "from"
42. Related to FM by a differential
44. Contains imperfections in a crystal lattice
45. Keyboard key
47. Amateur Radio on the International Space Station (acr.)
49. Chemical symbol for gallium
51. Negatively charged ions
54. Volts divided by resistance
56. Sound frequency in the human hearing range (abbr.)
57. Ground fault interrupter (abbr., pl.)
58. Hedy _____, Hollywood actress with first patent for spread spectrum communications
59. BlackBerry or Jordana for example (abbr., pl.)
60. Electrical overstress (abbr.)
62. Type of component package (abbr.)
63. Common plastic insulation type (abbr.)
65. Test equipment (abbr.)
68. Modern battlefield technique (abbr.)
72. Chemical symbol for holmium
75. Sharp bend in I-V curve
77. Chemical symbol for scandium
79. Describes the action of cleaving a crystal plane
81. Intel x86 command for " jump if above"
84. Electric enclosure standard organization (abbr.)
86. Maximum Usable Frequency
87. Send Morse Code
89. Unit for 1,000,000 watt-seconds (abbr.)
90. Chemical symbol for silver
91. A complete set of data bits in a stream
92. Arithmetic Logic Unit (abbr.)
94. Chemical symbol for gold
96. One of many similar appendages of a fan
98. Chemical symbol for thulium
100. Type of data storage IC (abbr.)
101. Semiconductor and calculator company (abbr.)
102. Erbium Doped Fiber Amplifier (abbr.)
105. Unit of length (abbr.)
107. Amplifier linearity specification (abbr.)
108. Digital encoding of the transmission mode in the vertical sync portion of an SSTV image (abbr.)
110. Part of a male connector
111. A semi-automatic mechanical code key
112. Engineering Change Order (abbr.)
114. Chemical symbol for praseodymium
115. Electrical safety organization (abbr.)
117. One type of electron spin
119. Chemical symbol for neodymium
120. Greek letter used for frequency
121. Chemical symbol for thallium
122. Type of modulation (abbr.)

See solution below


2021 Crosswords 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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Science Theme Crossword Puzzle Solution for August 22nd, 2021 - RF Cafe

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