By proper selection of the radiant reflectance of the reflectors
that are interleaved between the half-wave thickness spacers it is
possible to design an all-dielectric bandpass for wavelength-division
multiplexing. Its passband spectral shape approximates a Chebyshev
polynomial.
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SWR’s of a Three-Cavity Bandpass with Chebyshev
Responsea
In ANSI C language the function ≪x3_cavity≫ that returns approximate values for the standing-wave
ratios V
0
and V
1
of the
two reflectors of a three-cavity bandpass with a quasi-Chebyshev
passband transmittance. Input: lvm, which is equivalent to eta
[η in Eq. (3)]. The range is 6 ≤ lvm ≤
30. Input: ripple_in_percent in excess of 0.01 but less than
6. Output: V[0] and V[1]. The function ≪poly3≫
appears in Table 3.
Table 2
SWR’s of a Four-Cavity Bandpass with Chebyshev
Responsea
In ANSI C language the function
≪x4_cavity≫ that returns approximate values for the standing-wave
ratios V
0
, V
1
, and
V
2
of the three reflectors of a four-cavity
bandpass with a quasi-Chebyshev passband
transmittance. Input: lvm, which is equivalent to eta [η in
Eq. (3)]. The range is 6 ≤ lvm ≤
30. Input: ripple_in_percent in excess of 0.01 but less than
6. Output: V[0], V[1], and V[2]. The function
≪poly3≫ appears in Table 3.
Table 3
SWR’s of a Five-Cavity Bandpass with Chebyshev
Responsea
In ANSI language the function
≪x5_cavity≫ that returns approximate values for the standing-wave
ratios V
0
, V
1
, and
V
2
of the three reflectors of a five-cavity
bandpass with a quasi-Chebyshev passband
transmittance. Input: lvm, which is equivalent to eta [η in
Eq. (3)]. The range is 6 ≤ lvm ≤
30. Input: ripple_in_percent in excess of 0.01 but less than
6. Output: V[0] and V[1], and V[2]. The
functions ≪poly1≫ and ≪poly3≫ are included.
Tables (3)
Table 1
SWR’s of a Three-Cavity Bandpass with Chebyshev
Responsea
In ANSI C language the function ≪x3_cavity≫ that returns approximate values for the standing-wave
ratios V
0
and V
1
of the
two reflectors of a three-cavity bandpass with a quasi-Chebyshev
passband transmittance. Input: lvm, which is equivalent to eta
[η in Eq. (3)]. The range is 6 ≤ lvm ≤
30. Input: ripple_in_percent in excess of 0.01 but less than
6. Output: V[0] and V[1]. The function ≪poly3≫
appears in Table 3.
Table 2
SWR’s of a Four-Cavity Bandpass with Chebyshev
Responsea
In ANSI C language the function
≪x4_cavity≫ that returns approximate values for the standing-wave
ratios V
0
, V
1
, and
V
2
of the three reflectors of a four-cavity
bandpass with a quasi-Chebyshev passband
transmittance. Input: lvm, which is equivalent to eta [η in
Eq. (3)]. The range is 6 ≤ lvm ≤
30. Input: ripple_in_percent in excess of 0.01 but less than
6. Output: V[0], V[1], and V[2]. The function
≪poly3≫ appears in Table 3.
Table 3
SWR’s of a Five-Cavity Bandpass with Chebyshev
Responsea
In ANSI language the function
≪x5_cavity≫ that returns approximate values for the standing-wave
ratios V
0
, V
1
, and
V
2
of the three reflectors of a five-cavity
bandpass with a quasi-Chebyshev passband
transmittance. Input: lvm, which is equivalent to eta [η in
Eq. (3)]. The range is 6 ≤ lvm ≤
30. Input: ripple_in_percent in excess of 0.01 but less than
6. Output: V[0] and V[1], and V[2]. The
functions ≪poly1≫ and ≪poly3≫ are included.