Physics & Astronomy
accumulators
14%
amplifiers
25%
backward waves
37%
bandwidth
22%
beam currents
7%
broadband
39%
cavities
12%
circular waveguides
6%
corrugated waveguides
54%
couplers
22%
cusps
76%
cyclotron resonance
5%
cyclotrons
6%
directivity
7%
electron beams
40%
electron guns
55%
electrons
7%
frequency ranges
14%
gyroscopes
100%
harmonics
11%
interactions
19%
masers
5%
microwaves
24%
millimeter waves
20%
optimization
5%
orbits
8%
oscillators
24%
output
29%
performance
6%
recovery
8%
simulation
26%
superhigh frequencies
6%
traveling wave amplifiers
90%
triodes
6%
vacuum
7%
wave interaction
11%
waveguides
13%
Engineering & Materials Science
Amplification
8%
Circular waveguides
17%
Computer simulation
15%
Cyclotron resonance
6%
Cyclotrons
5%
Electron beams
47%
Electron guns
49%
Experiments
7%
Frequency agility
5%
Frequency bands
15%
Masers
5%
Microwaves
25%
Millimeter waves
15%
Multilayers
10%
Orbits
5%
Pulse repetition rate
12%
Radar
6%
Submillimeter waves
6%
Terahertz waves
5%
Vacuum
10%
Waveguides
62%
Wigglers
7%