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    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 Cafe Engineering Crossword Puzzle w/Weekly Headlines
March 19, 2017

For the sake of avid cruciverbalists amongst us, each week I create a new crossword puzzle that has a theme related to engineering, mathematics, chemistry, physics, and other technical words. Clues in this puzzle with an asterisk (*) are pulled from this past week's (3/13 - 3/17) "High Tech News" column on the RF Cafe homepage. Enjoy!

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

RF Cafe Engineering Crossword Puzzle w/Weekly Headlines March 19, 2017

1. Headphone _________ Explode on Flight to Australia *
7. Boy Scouts Announce 2017 ________-on-the-Air Theme *
11. 18 GHz to 26.5 GHz
14. Write-Once (abbr.)
15. Opposite of I.D.
16. Electrical safety organization (abbr.)
17. ECM response
19. Chemical symbol for neon
21. Chemical symbol for manganese
23. Type of data conversion device (abbr., pl.)
24. Curly-Q type light bulb (abbr.)
27. Local Oscillator (abbr.)
28. Filter type that blocks frequencies in a specified band (abbr.)
29. ISDN BRI channel
31. Chemical symbol for xenon
33. Filter type that blocks frequencies in a specified band (abbr.)
35. Powers pneumatic devices
37. Modem encoding method (abbr.)
38. Halves of DIP's
40. Teflon (abbr.)
41. Type of data conversion device (abbr.)
43. Silicon transistor type (abbr.)
46. Chemical symbol for aluminum
47. Chemical symbol for gadolinium
48. Band between RF and BB
50. Test point (abbr.)
51. Government program to bring electricity to farms (abbr.)
53. Type of memory
54. Permeability-tuned oscillator (abbr.)
56. Battery cell chemistry type (abbr.)
57. Multifunctional silicon devices (abbr.)
58. A BPF specification (abbr.)
60. Chemical symbol for chlorine
61. Electronic Variable Optical Attenuator (abbr.)
62. Amateur radio abbreviation for the Oceania region (abbr.)
63. Electronics manufacturer with "meatball" logo
65. Type of current flow (abbr.)
66. Direct Memory Access (abbr.)
67. The "L" in VLF
68. Type of chart
69. Modulation type (abbr.)
70. Marissa Mayer out at Yahoo! with $23M ______ Parachute *
71. Chemical symbol for europium
73. Institute of Electrical and Electronics Engineers
75. Space-Based ______ Among Beijing's High-Tech Arms *
76. Chemical symbol for terbium
78. Mate to a TX
79. Describes some waveguides that use a longitudinal protrusion to increase operational bandwidth
82. ____ Meet, a Ham's flea market
84. 10E1 numerical prefix
86. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.)
88. 1E6 nanoseconds
89. Transmit Incremental Tuning (abbr.)
90. Logic family
92. Negative temperature coefficient (abbr.)
94. Read-only (abbr.)
95. Network department (abbr.)
96. Chemical symbol for platinum
97. Started as HPIB
98. 1.602E-19 Joules
100. Unit of time (abbr.)
102. Unit of liquid measure (abbr.)
104. Unit of time
107. Type of logic gate (pl.)
109. Crystal filter type (abbr.)
111. Carrier-to-noise ratio (abbr.)
113. 1e-6 mA
114. Unit of apparent power (abbr.)
116. Chemical symbol for arsenic
117. Chemical symbol for antimony
119. Stock symbol for Raytheon
121. Innovative Power Products, Holbrook, NY (abbr.)
123. Microwaves & RF magazine (abbr.)
125. Ad-hoc on demand distance vector (abbr.)
127. Intentionally block communications signals
128. Logarithmic unit of power
130. European equivalent to the U.L.
131. Chemical symbol for gold
132. Co-channel rejection ratio (abbr.)
134. Start frequency (abbr.)
135. Unit of time (abbr.)
137. 30 GHz to 300 GHz
139. Fourth largest asteroid
141. Chemical symbol for tantalum
143. Chemical symbol for silicon
144. Adds solder to the tip of a soldering iron
146. Stock symbol for Boeing
148. Mate to an RX
150. Army-Navy specification prefix
151. Runge-_____ method in differential equations
152. Removing oxygen from or adding hydrogen to a compound
153. _________ Market Plunged 14% in 2016 *
1. Glued together
2. Part of a FOR loop
3. Time Division Multiplexing
4. Chemical symbol for ruthenium
5. Precision landing system (abbr.)
6. Losing _________ Nearly as Stressful as Terror Threat *
7. Cable protective covering (pl.)
8. Low- to mid- frequency RF connector
9. BS__ - the degree held by many RF Cafe visitors
10. High-speed logic family
11. Unit of length (abbr.)
12. Audio Frequency Shift Keying (abbr.)
13. People who perform the "D" part of R&D
18. Chemical symbol for cobalt
20. Chemical symbol for einsteinium
22. Qualcomm Makes $47B Takeover Bid for ___ Semiconductor *
25. Crystal surface
26. Chemical symbol for lithium
28. Broadband Signal Intrusion (abbr.)
30. Family of ICs with a certain component density level (abbr.)
32. Chemical symbol for einsteinium
33. Filter type that blocks frequencies below and above a specified band (abbr.)
34. Analog-to-Digital (abbr.)
36. Chemical symbol for radon
39. Type of secondary radar system (abbr.)
42. Flash caused by an electric current ionizing a gas or vapor
44. Chemical symbol for praseodymium
45. Type of logic gate
46. PC follower
47. FBI Allegedly Paid ____ Squad Techs as 'Confidential Human Sources' *
49. Ratio of circumference to diameter
52. Sound frequency in the human hearing range (abbr.)
54. Pick-and-_____ automated PCB component insertion tool
55. Small Office/Home Office (abbr.)
56. A common lamp tube gas
57. U.K. equivalent of the IEEE
59. Paced by Big Spenders, Chip _____ Projected to Grow *
60. Centimeter (abbr.)
63. Sprint Shows off _______ Class LTE with Qualcomm, Motorola
64. The design component of total product cost (abbr.)
66. Direct Memory Access (abbr.)
67. Has a positive phase wrt a reference
69. Up in the air
72. User Datagram Protocol
73. Intermodulation distortion (abbr.)
74. Chemical symbol for erbium
76. Thin Shrink Small Outline Package (abbr.)
77. Bandwidth (abbr.)
79. _____ _____ Again Files for Bankruptcy (2 wds.) *
80. Force required to impart an acceleration of one centimeter per second per second to a mass of one gram (pl.)
81. Science of assuring operation amid dense EM background noise (abbr.)
83. Abbreviation for acknowledge (also a common word used by Bill the Cat)
85. Supplier of high power linear and pulsed RF, microwave and millimeter wave amplifiers in San Marcos, CA
86. An abbreviation for "receiver"
87. Sends a file over a network (abbr.)
89. Transmit Incremental Tuning (abbr.)
91. Packet Bulletin Board System
93. Boob tube (abbr.)
99. Precision approach radar (abbr.)
101. Chemical symbol for scandium
102. Ham's code for "Shall I decrease power?"
103. _______ Plans to Shift Manufacturing from Mexico to U.S. *
105. One type of electron spin
106. A gaseous process that deposits insulating films or metal onto a wafer at elevated temperature (abbr.)
108. Chemical symbol for rubidium
110. Weight (abbr.)
112. Battery cell chemistry type (abbr.)
115. A feedback scheme to level out the receiver audio volume (abbr.)
116. Archaic term for an outdoor antenna
118. Akin to WAC, only just in America
120. Chemical symbol for neodymium
122. Chemical symbol for plutonium
124. Chemical symbol for iron
125. A common battery cell size
126. One port of an amplifier
127. Type of transistor (abbr.)
129. Chemical symbol for beryllium
133. Chemical symbol for cesium
135. Chemical symbol for nickel
136. Signal-to-noise ratio (abbr.)
138. Method of self-detection and self-fixing transmission of digital data (abbr.)
140. Largest broadcaster in the UK (abbr.)
142. System for guiding aircraft (abbr.)
144. Chemical symbol for tantalum
145. Chemical symbol for selenium
147. Chemical symbol for argon
149. Chemical symbol for xenon

See solution below


2017 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 Cafe Engineering Crossword Puzzle Solution w/Weekly Headlines March 19, 2017

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