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Electronics Theme Crossword Puzzle
July 30th, 2023

This week's crossword puzzle for July 30th sports an electronics theme. This being the 30th day of the month, many of the words begin and/or end with the letter "D." Since there are only 26 letters in the alphabet, I use the modulo function to derive the letter to use; i.e., 30 mod 26 = 4. Clues for words containing "D" are marked with an asterisk (*). All RF Cafe crossword puzzles are custom made by me, Kirt Blattenberger, and have only words and clues related to RF, microwave, and mm-wave engineering, optics, mathematics, chemistry, physics, and other technical subjects. 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., Reginald Denny, Hedy Lamarr, or the Tunguska event in Siberia). 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

Electronics Theme Crossword Puzzle for July 30th, 2023 - RF Cafe


1. Battery type designed for repeated charge-discharge cycles to 20% of remaining capacity (2 wds. hyph.)*
2. Chemical symbol for einsteinium
3. Amateur radio abbreviation for the Oceania region (abbr.)
4. Add two or more inputs
5. Radio frequency interference (abbr.)
6. Band between RF and BB
7. Chemical symbol for erbium
8. PhD*
12. 2/3 of a triac*
13. Common mode ripple rejection (abbr.)
14. Constellation : The southern cross
15. The "W" in AWG
17. Chemical symbol for rhodium
18. Radio signals from the cosmos (abbr.)
19. Form/fit/function replacement*
20. Transfer a signal by EM interaction
21. Logarithmic ratio (abbr.)*
22. Chemical symbol for francium
27. Opposite of a LO
28. One component of a complex number (abbr.)
31. Form a resistor lead*
32. Trigger diode that conducts current only after its breakdown voltage has been exceeded momentarily (pl.)*
33. The "R" in DRC in substrate layout
34. Connector vendor, now owned by FCI in St. Louis, Missouri
41. Small motored tool for model drilling, grinding, shaping, etc. (pl.)*
43. Logical negation operator
44. Agilent's (now Keysight) EE design software (abbr.)*
45. The core of an atom
48. Precision approach radar (abbr.)
50. Radio Direction Finding (abbr.)*
51. Using Earth's natural satellite as a passive reflector to establish a signal path (abbr.)
52. Printed Wiring Board (abbr.)
56. Added an impurity to a semiconductor*
57. Voltage-current phase mnemonic
58. A gaseous process that deposits insulating films or metal onto a wafer at elevated temperature (abbr.)*
59. Determines proper functionality
60. Adjacent Channel Power Ratio (abbr.)
62. Miniature RF connector (pl.)
63. State _______ - A type of drawing used in computer science and related fields to describe the behavior of systems, past tense*
65. Control and monitoring board (pl.)
66. Referring to atoms
68. In Geometry, what is a fixed line used in formulating the definition of a curve or surface*
76. Amateur radio abbreviation for the Oceania region (abbr.)
77. Part of this website's title
79. Dual Tone Multi-Frequency*
80. He, along with Mr. Savart, developed a law that describes a magnetic field generated by an electric current
82. Software storage unit
83. Adjust
85. Chemical symbol for argon
86. Type of logic gate
88. Morse Code for "from"*
89. Army-Navy specification prefix
94. The system than converts common website names to IP addresses (abbr.)*
95. Manufacturer of project boxes*
98. Type of matrix barcode used with laser scanning(abbr.)
99. One port of an amplifier
100. Greek letter (micro)
101. Chemical symbol for xenon


1. Smaller moon of Mars*
5. Describes some waveguides that use a longitudinal protrusion to increase operational bandwidth*
9. Chemical symbol for einsteinium
10. Lowest operational frequency of a waveguide
11. Read-only (abbr.)
12. Type of current*
14. Pure carrier (abbr.)
16. What kind of a number is divisible only by itself and 1
19. Type of current*
21. Change from the initial value due to instability*
23. Graph
24. Read-only (abbr.)
25. International QSL forwarding bureau
26. Chemical symbol for chromium
27. Unit of time
29. Chemical symbol for xenon
30. Unlicensed FCC Part 95 realm for personal and business radio use (abbr.)
32. Slang for Ursa Major*
34. Stock symbol for Boeing
35. Front edge of a wing (abbr.)
36. Chemical symbol for bismuth
37. S12 or S21 (abbr.)
38. One type of electron spin
39. Radio signals from the cosmos (abbr.)
40. Last statement in a BASIC program*
42. Soften metal
45. The design component of total product cost (abbr.)
46. Constellation : The dragon*
47. Troubleshooting software*
49. Subject a circuit to extreme operation
53. Branch of the armed forces
54. Decimeter (abbr.)*
55. Imperfection in a crystal lattice
56. Impurity in a semiconductor*
60. Alternative name for Beta Persei
61. The evening star
63. Cellphone band just below PCS*
64. Attenuator configuration (pl.)*
67. Electronic component package type (abbr.)*
69. Internet protocol (abbr.)
70. Akin to an EE, CE, AE, etc.
71. PC follower
72. Semiconductor and calculator company (abbr.)
73. Chemical symbol for bismuth
74. Chemical symbol for argon
75. Impurity in a semiconductor that adds a mobile electron in the conduction band (pl.)*
78. Chemical symbol for strontium
79. Logarithmic ratio (abbr.)*
81. Counter ElectroMotive Force (abbr.)
82. Unit of length (abbr.)
84. Proportion of two numbers
87. Chemical symbol for lithium
88. English theoretical physicist who created the delta function now named after him*
90. Strong cable covering
91. Chemical symbol for scandium
92. Type of high-tech data gathering system (abbr.)
93. Unit of length (abbr.)
96. Electromagnetic (abbr.)
97. Equalizer (abbr.)
99. Its chemical symbol is In*
101. Greek letter
102. One port on a FET (pl.)*
103. Communication mode in which a radio transmits on one frequency and receives on another*

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

Electronics Themed Crossword Puzzle Solution for July 30th, 2023 - RF Cafe

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