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RF Cafe Engineering & Science Crossword Puzzle
October 29th, 2023

As with my hundreds of previous engineering and science-themed crossword puzzles, this one for October 29th uses only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc., which I have built up over more than two decades. Many new words and company names have been added that had not even been added to the world's technical lexicon when I started in the year 2002.

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. You might, however, encounter the name of a movie star like Hedy Lamarr or a geographical location like Tunguska, Russia, for reasons which, if you don't already know, might surprise you.  The technically inclined cruciverbalists amongst us will appreciate the effort. A full list of all RF Cafe crosswords is at the page bottom. Enjoy!

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

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

Engineering & Science Crossword Puzzle for October 29, 2023 - RF Cafe 

<click for full size to print>

1. Causing a voltage or current waveform to gradually die out
6. Generic term for a capacitor or inductor
11. Software drafting tool (abbr.)
12. Sound frequency in the human hearing range (abbr.)
13. Switch configuration (abbr.)
16. Unit of inductance (abbr.)
17. Keyboard key
19. Word used in describing 2-D and 3-D object dimensions; i.e., 10 mm __ 25 mm
20. A common RS-232 serial bus command (abbr.)
21. Elementary particle
22. Type of digital filter (abbr.)
24. A common battery cell size
25. milliampere-hour (abbr.)
27. Filter type that blocks upper frequencies (abbr.)
29. Peak envelope power (abbr.)
31. Factor of a polynomial
32. A coherent monochrome light source (pl.)
35. Network configuration type (pl.)
37. Unit of inductance (abbr.)
38. Resistor used to drain voltage off of a high potential supply (pl.)
40. Electrical safety organization (abbr.)
41. Centimeter (abbr.)
43. Exponent that returns the original number
45. Discipline for aircraft navigation in low visibility environments (abbr.)
47. Chemical symbol for radium
48. Sound frequency in the human hearing range (abbr.)
49. Device under test (abbr.)
50. The cell band above DCN
51. Switch position
52. Chemical symbol for iron
53. Between-series connector (pl.)
58. Chemical symbol for lithium
60. The highest level Amateur Radio license rating
62. Does not reference the power supply outputs to ground
63. This is required to causes a change in the motion of a body
64. Attenuator
65. Internet protocol (abbr.)
66. A keyboard key
67. Min-to-max voltage of a waveform (abbr.)
69. Yttrium Aluminum Garnet
71. Sharp bend in I-V curve
73. "Texting" (abbr.)
74. 10E1 numerical prefix
76. A feedback scheme to level out the receiver audio volume (abbr.)
78. Unit of capacitance (abbr.)
79. European Telecommunications Standards Institute (abbr.)
80. Weight (abbr.)
81. Heterojunction Bipolar Transistor
82. Run through compliance testing
83. A condition in which "free" or dissolved oxygen is present in water
1. 24 hours
2. Analog-to-Digital (abbr.)
3. Radio signal route (pl.)
4. Bands between RF and baseband
5. Global System for Mobile Communications (abbr.)
6. Stock symbol for Raytheon
7. Software layer that allows a system to be programmed via a defined set of commands (abbr.)
8. ICs
9. Opposite of I.D.
10. Government program to bring electricity to farms (abbr.)
11. Unlicensed FCC Part 95 realm for personal and business radio use (abbr.)
14. Short waveform excursion from a reference state
15. Added an impurity to a semiconductor
18. Chemical symbol for lanthanum
20. Stream of electrons (2 wds.)
23. S11 (2 wds.)
25. Minutes of Use (abbr.)
26. Wireless local loop (abbr.)
28. Airport Surveillance Radar (abbr.)
30. Programmable logic device (abbr.)
31. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.)
33. Archaic term for an outdoor antenna
34. Ctr+Alt+Del
36. Mr. Arrhenius' first name
38. Electron beam particle
39. Halves of DIP's
42. 300 kHz to 3 MHz
44. Greek letter used for frequency
46. A BPF specification (abbr.)
47. Read-only (abbr.)
52. Network file transfer protocol (abbr.)
54. Design for Manufacturability (abbr.)
55. The tip of a PCB probe
56. They go on reels for high volume production
57. Readability, Signal, and Tone (QoS report type)
59. International Reply Coupon (abbr.)
61. Change connector type
63. 10E-15 numerical prefix
67. Last stage in a transmitter (abbr.)
68. Common plastic insulation type (abbr.)
70. Ground fault interrupter (abbr.)
71. Send Morse Code
72. Electronics Industry Association (abbr.)
73. Measure of source / load mismatch (abbr.)
74. Relative power level unit (abbr.)
75. PC follower
77. European equivalent to the U.L.
81. Opposite of a LO

See solution below


2023 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.

2024 | 2023 |2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | Sudoku


A cruciverbalist is a person who is skilled at creating or solving crossword puzzles. The term is a combination of "cruci-" from "crucifix," meaning cross, and "verbalist" from "verbal," indicating a person who deals with words. cruciverbalists are often responsible for designing crossword puzzles, and they possess a deep knowledge of wordplay, vocabulary, and the techniques used in constructing and solving crosswords. They aim to make puzzles that are both challenging and enjoyable for crossword enthusiasts.

December 31

December 24

December 17

December 10

December 3

November 26

November 19

November 12

November 5

R-E Puzzler - August 1967 R-E

October 29

October 22

October 15

October 8

October 1

September 24

September 17

September 10

September 3


August 27

August 20

August 13

August 6

Electronic Numbers - May 1961 R-E

July 30

July 23

July 16

July 9

R-E Puzzler - Oct 1967 R-E

July 2

June 25

June 18

June 11

June 4

May 28

May 21

May 14

May 7


April 30

April 23

April 16

April 9 - Easter

R-E Puzzler - Jan 1967 R-E

April 2

March 26

March 19

March 12

March 5

February 26

February 19

February 12

February 5

January 29

January 22

January 15

January 8

January 1



Engineering & Science Crossword Solution October 29, 2023 - RF Cafe

Exodus Advanced Communications Best in Class RF Amplifier SSPAs - RF Cafe
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