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About RF Cafe

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...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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RIGOL Technologies (test equipment) - RF Cafe

Radio Theme Crossword Puzzle
June 6, 2021

For twenty years now, I have been creating weekly crossword puzzles for the education and enjoyment of the technically minded visitor like you. This Radio Theme Crossword Puzzle for June 6th has many 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 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

Radio Theme Crossword Puzzle for June 6th, 2021 - RF Cafe

1. Device for translating higher frequencies to lower frequencies (pl.)
10. Sound frequency in the human hearing range (abbr.)
11. Chemical symbol for einsteinium
12. Rate of a radar transmitter's output waveform (abbr.)
13. Unit of time (abbr.)
16. One type of electron spin
19. Unit of energy
20. Chemical symbol for lawrencium
22. Chemical symbol for manganese
23. Columns of rising hot air
25. Colorado Springs military school (abbr.)
26. __ + 32 Across is this website's name
28. BS__ - the degree held by many RF Cafe visitors
30. Common average used for sinewaves (abbr.)
32. 26 Across + ____ is this website's name
33. The nearest star - Alpha ________
36. 1e3 uV
39. Unit of liquid measure (abbr.)
40. Unit of time (abbr.)
41. Chemical element abbreviated Sn
43. Facsimile
46. Antenna (abbr.)
48. Chemical symbol for tantalum
50. Flat type of multiconductor wire
54. Test equipment (abbr.)
55. Aerodynamic opposition to thrust
56. ISDN BRI channel
57. Infrared (abbr.)
58. Signal path with very high or infinite impedance
62. Chemical symbol for beryllium
63. 3 kHz to 30 kHz
65. Electrical overstress (abbr.)
66. Gun safety and education organization (abbr.)
68. Type of logic gate
70. Type of component package (abbr.)
73. Chemical symbol for argon
74. Element in front of the driven element in a Yagi or Quad antenna
75. Small Office/Home Office (abbr.)
76. A common battery cell size
78. Test equipment (abbr.)
80. Filter type that blocks upper frequencies (abbr.)
81. Slang for transmitter and/or receiver
83. Diode type whose capacitance is controlled by a reverse bias
84. Unit of magnetic flux(abbr.)
86. Chemical symbol for silicon
87. ___-back transformer
88. International Amateur Radio Union (abbr.)
89. Ratio of circumference to diameter
91. Software drafting tool (abbr.)
94. Greek letter used for frequency
95. Chemical symbol for thulium
97. Antenna structure that connects directly to the feed line (2 wds., pl.)
1. 10E1 numerical prefix
2. Orthogonal frequency-division multiplexing (abbr.)
3. In the middle
4. Unix, Linux or Windows (abbr.)
5. Abbreviation for peak voltage
6. Chemical symbol for erbium
7. Microwaves & __ magazine
8. CB slang for CB radio or antenna
9. Chemical symbol for tin
14. Below ELF
15. A network of components used to partition current into certain levels at certain points (2 wds., pl.)
17. Exponent that returns the original number
18. Institute of Electrical and Electronics Engineers
19. Type of high-tech data gathering system (abbr.)
21. Another name for Morse code
24. One component of a complex number (abbr.)
27. Type of modulation (abbr.)
29. Wireless application protocol (abbr.)
31. Surface Mount Technology
34. Equalizer (abbr.)
35. Country of RF Cafe's residency
37. Constellation : The virgin
38. Cooling device
42. Chemical symbol for nickel
43. This is required to causes a change in the motion of a body
44. More than one XCVR
45. Chemical symbol for chlorine
47. Transportation accident investigation agency (abbr.)
49. Ham radio organization (abbr.)
51. The UK's largest defense electronics contractor (abbr.)
52. Unit of heat
53. The highest level Amateur Radio license rating,The "E" in EHF
59. Min-to-max voltage of a waveform (abbr.)
60. Charged particle
61. One port of an amplifier
64. BASIC looping keyword
67. Amateur Radio Association (abbr.)
69. Government program to bring electricity to farms (abbr.)
70. A type of capacitance or inductance
71. Chemical symbol for molybdenum
72. Its chemical symbol is Th
75. Adjusts a pot
77. Chemical symbol for aluminum
78. Coefficient of temperature (abbr.)
79. Abbreviation for "power"
82. Input intercept point (abbr.)
83. Family of ICs with a certain component density level (abbr.)
85. End-to-end joint
90. Opposite of O.D.
91. European equivalent to the U.L.
92. Army-Navy specification prefix
93. Morse Code for "from"
94. Chemical symbol for neon
96. 1E6 nanoseconds

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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Radio Theme Crossword Solution for June 6th, 2021 - RF Cafe

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