Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinearity and wideband parametric amplification in an NbTiN
  microstrip transmission line   The nonlinear response associated with the current dependence of the
superconducting kinetic inductance was studied in capacitively shunted NbTiN
microstrip transmission lines. It was found that the inductance per unit length
of one microstrip line could be changed by up to 20% by applying a DC current,
corresponding to a single pass time delay of 0.7 ns. To investigate nonlinear
dissipation, Bragg reflectors were placed on either end of a section of this
type of transmission line, creating resonances over a range of frequencies.
From the change in the resonance linewidth and amplitude with DC current, the
ratio of the reactive to the dissipative response of the line was found to be
788. The low dissipation makes these transmission lines suitable for a number
of applications that are microwave and millimeter-wave band analogues of
nonlinear optical processes. As an example, by applying a millimeter-wave pump
tone, very wide band parametric amplification was observed between about 3 and
34 GHz. Use as a current variable delay line for an on-chip millimeter-wave
Fourier transform spectrometer is also considered.

14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin