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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...

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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RF Cafe Science & Engineering Crossword Puzzle
April 19, 2020

April 19 commemorates a special birthday here at RF Cafe as explained in 39 and 74 Across. You can calculate her age by solving these two equations in two unknowns: Her Age = Her Year of Birth - 1902, and My Age = Her Year of Birth - 1900. Actually, you don't need to know my age to solve the first equation. This tech-themed crossword puzzle contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc., which I have personally built over nearly two decades. Many new words and company names have been added that had not even been created when I started in the year 2002. You will never find a word taxing your knowledge of a numbnut soap opera star or the name of some obscure village in the Andes mountains. 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.

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

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

Radio & Radar Engineering Crossword Puzzle April 19, 2020 - RF Cafe

<click for full size to print>

1. State _______ - A type of drawing used in computer science and related fields to describe the behavior of systems (pl.)
6. Variable crystal oscillator (abbr.)
9. Determination of cause and effect
15. Electrical overstress (abbr.)
16. The tip of a PCB probe
18. Total Access Communication System (abbr.)
20. Cyanide (abbr.)
21. System On Chip
23. Radio Direction Finding (abbr.)
24. High-speed logic family
25. Organization requiring 25 years of amateur service for membership, abbr.
26. Chemical symbol for lithium
28. Transformer interwinding connection
30. Type of data conversion device (abbr.)
32. Low- to mid- frequency RF connector
33. Open-______ or closed-______ system
34. Thread cutting tools
37. Service of the ARRL that helps hams solve technical problems (abbr.)
39. _______ + 74 Across, Ma jolie femme, Meine schöne Frau, Mi hermosa esposa, Mia bella moglie, Min vackra fru,Mia bela edzino, Mo bhean álainn, 私の美しい妻
43. Chemical symbol for calcium
44. Write-Once (abbr.)
45. Using minimum resources
48. Type of optical network
50. Mate to a TX
52. Chemical symbol for radium
53. Line of Sight (abbr.)
54. European equivalent to the U.L.
56. Modulation type (abbr.)
57. Stock symbol for Harris Communications
59. Chemical symbol for bismuth
62. Chemical symbol for xenon
64. RF IC manufacturer located in Dübendorf, Switzerland
67. Oscillate from + to -
71. Sound frequency in the human hearing range (abbr.)
73. Type of matrix barcode used with laser scanning(abbr.)
74. 39 Across + _______, Ma jolie femme, Meine schöne Frau, Mi hermosa esposa, Mia bella moglie, Min vackra fru,Mia bela edzino, Mo bhean álainn, 私の美しい妻
76. Unit of atmospheric pressure (abbr.)
77. Balun with both ports unbalanced
78. Software function selection mechanism
79. Programmable logic device (abbr.)
80. Semiconductor lamp
82. Peak envelope power (abbr.)
84. Electromagnetic (abbr.)
85. Amateur Radio Emergency Service (abbr.)
87. Silicon transistor type
90. Big Blue
91. Be behind in phase
92. Ratio of circumference to diameter
93. Type of programmable device (abbr.)
95. The "F" in EMF
98. File name extension for an ASCII file
99. Having no resistive component
100. Akin to EEs, CEs, AEs, etc. (abbr., pl.)
101. Another name for amateur radio
1. Opposite of encode
2. Charged particle
3. Chemical symbol for arsenic
4. One factor of a polynomial
5. Chemical symbol for manganese
6. Vector Offset Frequency Shift Keying
7. Greek letter
8. Exponent that returns the original number
10. Unit of inductance (abbr.)
11. Type of high frequency circuit substrate (abbr.)
12. Rotate about the vertical axis
13. What kind of mathematical quantity has magnitude, but no direction
14. Network department (abbr.)
16. BlackBerry or Palm for example (abbr.)
17. Coefficient of temperature (abbr.)
19. Common test for verifying high voltage tolerance w/o breakdown
22. Positively charged ion
25. Ham's code for "Entire net stand by."
26. The "L" in VLF
27. Weather facsimile, Ham abbr.
29. Chart types
31. World's largest yearly convention of gadget and device manufacturers (abbr.)
32. The "B" in BER
35. Discipline for aircraft navigation in low visibility environments (abbr.)
36. Chemical symbol for silicon
38. Chemical symbol for tin
40. Local Oscillator (abbr.)
41. Automatic network analyzer (abbr.)
42. Electric enclosure standard organization (abbr.)
46. Chemical symbol for chlorine
47. Temperature-compensated crystal oscillator (abbr.)
49. Small motored tool for model drilling, grinding, shaping, etc.
51. 8 GHz to 12.5 GHz
55. IC killer (abbr.)
57. Web page language
58. Chemical symbol for strontium
60. International Telecommunications Union
61. Mr. Joule's first name
63. Totals
64. Online service
65. Modern battlefield technique (abbr.)
66. 1/000 of an inch
68. Chemical symbol for lanthanum
69. Greek letter used for frequency
70. Mr. Fermi's first name
72. Finite-Element Model
74. One state of matter
75. Mr. Bohr's first name
79. Positive emitter-coupled logic (abbr.)
81. Decibels above or below a dipole antenna (abbr.)
83. Set of poles
86. Effective frontal area presented to a microwave interrogation system (abbr.)
88. A measure of receiver quality (abbr.)
89. Spurious RF products created by metal joints (abbr.)
92. Greek letter
93. Chemical symbol for polonium
94. Chemical symbol for einsteinium
96. BS__ - the degree held by many RF Cafe visitors
97. Stock symbol for Boeing
98. Analog-to-Digital (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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Radio & Radar Engineering Crossword Solution April 19 - RF Cafe

high frequency PCB of PCBONLINE
withwave microwave devices - RF Cafe
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