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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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RF Engineering Theme Crossword Puzzle
January 31st, 2021

This RF Engineering Theme crossword puzzle for January 31st 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. You will need to print out a hard copy. Enjoy!

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

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


RF Engineering Theme Crossword Puzzle for January 31st, 2021 - RF Cafe


1. International Telecommunications Union
5. Indium phosphide (abbr.)
8. Chemical symbol for gold
9. Greek letter (micro)
11. Front edge of a wing (abbr.)
13. Sets of 5 work days
16. Chemical symbol for lanthanum
17. Powers pneumatic devices
19. FCC's Universal Licensing System (abbr.)
20. Newest buzz phrase for ubiquitous remote control and monitoring of everything (abbr.)
21. 16 Down + ____, the world's best engineering website
23. Organization requiring 25 years of amateur service for membership (abbr.)
24. First American to orbit the earth - John _____
25. Electron beam particle
28. Electronic Variable Optical Attenuator (abbr.)
31. Ovenized crystal oscillator (abbr.)
32. Bands between RF and baseband
34. Akin to EEs, CEs, AEs, etc. (abbr., pl.)
35. Decimeter (abbr.)
36. Alloy of iron and low percentages of carbon, manganese, chromium, etc.
38. Akin to an EE, CE, AE, etc.
39. Opposite of a LO
40. A BPF specification (abbr.)
42. 1/000 of an amp (abbr.)
43. Negative temperature coefficient (abbr.)
45. Electrical safety organization (abbr.)
47. Mr. de Forest's first name
49. Computer monitor cable type (abbr.)
52. Unit of time (abbr.)
54. Weight (abbr.)
55. Opposite of O.D.
56. Ratio of circumference to diameter
57. The system than converts common website names to IP addresses (abbr.)
59. Key feature in a high level overvoltage protection device
60. Base of the binary number system
61. Input intercept point (abbr.)
62. Effective frontal area presented to a microwave interrogation system (abbr.)
64. Shortwave listener (abbr.)
66. Chemical symbol for scandium
67. Chemical symbol for berkelium
68. Modulation type (abbr.)
70. Chemical symbol for beryllium
71. Low Noise Amplifier (abbr.)
72. Cable termination type
73. Switch position
75. Cyanide (abbr.)
76. Ham abbreviation for "distant station"
77. Chemical symbol for zinc
78. Unit of resistance
80. Type of computer display (abbr.)
81. Internet address (abbr.)


2. Chemical symbol for tantalum
3. Archaic abbreviation for picowatt
4. Type of transistor (2 wds.)
5. International Microwave Symposium (abbr.)
6. Greek letter used for frequency
7. Perfect absorber of radiation (2 wds.)
10. Collection of electronic records (pl.)
12. Electronics Industry Association (abbr.)
14. Chemical symbol for europium
15. 1,000 seconds (abbr.)
16. The "L" in VLF
18. __ + 21 Across, the world's premier engineering website
20. Multifunctional silicon devices (abbr.)
22. Enhanced Graphics Adapter
23. Ham's code for "Entire net stand by."
26. Electronic warfare defense (abbr.)
27. Mate to an RX
29. Abbreviation for minimum voltage
30. Original Equipment Manufacturer (abbr.)
32. Network department (abbr.)
33. Chemical symbol for selenium
36. Chemical symbol for silicon
37. 30 kHz to 300 kHz
39. The computer in 2001: A Space Odyssey
41. Mr. Piper's famous yellow airplane
43. S-Parameter measurement instrument (2 wds.)
44. Damping at which no overshoot or undershoot exists (2 wds.)
46. Not reaching the steady-state voltage output
48. Modern battlefield technique (abbr.)
50. Chemical symbol for gadolinium
51. 2-element, 1/2 wavelength radiating structure fed at the center (2 wds.)
53. Chemical symbol for tin
56. Last stage in a transmitter (abbr.)
58. Official Space Shuttle designation (abbr.)
59. World's first satellite navigation system (abbr.)
63. Unit of volume (abbr.)
65. Unit of magnetic flux(abbr.)
67. Low- to mid- frequency RF connector
69. Multiplexer (abbr.)
74. Unit of inductance (abbr.)
77. Chemical symbol for zirconium
79. Maximum Usable Frequency
80. Describes the action of cleaving a crystal plane
84. Chemical symbol for iron
86. Intermodulation (abbr.)
88. 1/100 meter (abbr.)
90. Type of logic gate
92. End of transmission (abbr.)
94. Unit of energy
97. Performing a calculus function
99. That which has mass and occupies space
101. Internet protocol (abbr.)
102. 1,000 seconds (abbr.)
103. Short-lived voltage or current excursion
105. Adjust a pot
107. A common battery cell size
108. Opposite of a LO
109. Ham's code for "The net has traffic for you. Stand by."
111. Chemical symbol for lutetium
113. Chemical symbol for radon
115. Digital transmission figure of merit (abbr.)
116. 300 MHz to 3 GHz
119. World's largest yearly convention of high tech gadget and device manufacturers (abbr.)
120. Chemical symbol for platinum
122. Amateur radio abbreviation for the Oceania region (abbr.)
123. Person responsible for program spending (abbr.)
125. Chemical symbol for praseodymium
126. Unix, Linux or Windows (abbr.)
129. Peak envelope power (abbr.)
130. Lowest power level capable of being demodulated (abbr.)
132. Chemical symbol for erbium
134. Bandwidth (abbr.)


82. Minutes of Use (abbr.)
83. Type of secondary radar system (abbr.)
85. Chemical element abbreviated Sn
87. Chemical symbol for neon
88. CPS
89. Galilean moon
91. Chemical symbol for manganese
92. Using the moon as a passive reflector to establish a signal path; moonbounce (abbr.)
93. The design component of total product cost (abbr.)
95. Chemical symbol for holmium
96. Slang for transmitter and/or receiver
98. Part of this website's title
100. Semiconductor and calculator company (abbr.)
102. Mass unit (abbr.)
104. Unit of time (abbr.)
106. Radio signal route (pl.)
109. Type of matrix barcode used with laser scanning(abbr.)
110. 10 decibels
112. Anatech Electronics Inc., (abbr.)
113. Rádio Nacional de Angola (abbr.)
114. A length of transmission line that is open or shorted at one end
116. Balun with both ports unbalanced
117. Third planet from the sun
118. Adjacent Channel Power Ratio (abbr.)
121. An ellipse has two of them
124. On-the-air meeting of hams at a set time, day and radio frequency
125. Permeability-tuned oscillator (abbr.)
127. Software engineering tool (abbr.)
128. Chemical symbol for cesium
129. Geometric solid having two ends which are similar, equal, and parallel rectilinear figures, and sides which are parallelograms
131. Chemical symbol for manganese
132. BS__ - the degree held by many RF Cafe visitors
133. Logarithmic ratio (abbr.)
135. Effective Radiated Power (abbr.)
136. Measure of source / load mismatch (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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RF Engineering Theme Crossword Puzzle Solution for January 31st, 2021 - RF Cafe

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