Physics & Astronomy
microwaves
100%
corrugated waveguides
96%
masers
66%
pulse compression
63%
free electrons
50%
electron beams
48%
pulses
45%
superhigh frequencies
31%
oscillators
29%
sweep frequency
29%
waveguides
28%
backward waves
27%
cavities
26%
high current
26%
mirrors
23%
output
23%
compressors
19%
microwave coupling
18%
plasma interaction experiment
17%
electromagnetic radiation
15%
interactions
15%
insulation
14%
power supplies
14%
cut-off
13%
pulse duration
12%
lasing
12%
radiation
11%
frequency modulation
11%
amplifiers
11%
group velocity
11%
Bragg reflectors
10%
coherent radiation
9%
simulation
9%
energy
8%
circumferences
8%
predictions
8%
frequency ranges
8%
radii
8%
diodes
8%
accelerators
8%
traveling wave amplifiers
7%
breakdown
7%
laser plasma interactions
7%
electron guns
7%
broadband
7%
field strength
7%
circular waveguides
7%
submillimeter waves
6%
characterization
6%
bandwidth
6%
Engineering & Materials Science
Masers
37%
Electron beams
36%
Microwaves
31%
Waveguides
26%
Pulse compression
25%
Electrons
22%
Mirrors
22%
Helical waveguides
17%
Experiments
12%
Feedback
12%
Radiation
10%
Helicons
10%
Finite element method
7%
Compressors
7%
Electromagnetic waves
6%
Studios
6%
Conversion efficiency
5%
Millimeter waves
5%
Plasmas
5%