|
Delay time is defined as the duration between
the time a signal enters a coaxial line
until it emerges from the other end of a
coaxial line. The delay time is essentially
independent of frequency and is a function
of the dielectric constant and the physical
length of the transmission line. Delay time
is typically indicated in nanoseconds (10-9
seconds) per foot.
|
DIELECTRIC
CONSTANT AT 3 GHz, 25°C
|
| AIR
|
1.00 |
| CERAMIC
STEATITE |
5.70 |
| GLASS,
BOROSILICATE (KOVAR SEALING) |
4.90 |
| NYLON
|
2.84 |
| POLYETHYLENE
(SOLID) |
2.26 |
| POLYETHYLENE
(FOAMED) |
1.20
-1.55 |
| POLYPROPYLENE
|
2.55 |
| POLYSTYRENE
|
2.55 |
| POLYSTYRENE,
CROSS-LINKED |
2.58 |
| POLYSTYRENE,
FOAMED 0.25% FILLER |
1.03 |
| POLYTETRAFLUOROETHYLENE
(SOLID TEFLON) |
2.03 |
| POLYTETRAFLUOROETHYLENE
(LOW DENSITY) |
1.2
– 1.60 |
| PORCELAIN
|
5.04 |
| RUBBER,
BUTYL |
2.35 |
| RUBBER,
NEOPRENE |
4.00 |
| RUBBER,
SILICONE |
3.13 |
| FLUOROLOY
H |
2.43 |
| 9010
CORNING GLASS |
6.3 |
| 9013
CORNING GLASS |
6.65 |
| NORYL
|
2.55 |
| K-50
|
2.60 |
| ULTEM
|
3.05 |
Engineering
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