Glossary of Generic RF Devices & Physical Transmission Lines
Contents
- 1 Bond Wire Above Ground
- 2 Bond Wire (Free-Space)
- 3 Chip Resistor
- 4 Coaxial Line
- 5 Coaxial Step in Inner Conductor
- 6 Coaxial Step in Outer Conductor
- 7 Conductor-Backed CPW Line
- 8 Coplanar Strips (CPS) Line
- 9 Coplanar Waveguide (CPW) Line
- 10 Coupled Microstrip Lines
- 11 Coupled Striplines
- 12 Covered CPW Line
- 13 Covered Conductor-Backed CPW Line
- 14 Covered Microstrip Line
- 15 CPW Gap
- 16 CPW Open End
- 17 CPW Short End
- 18 CPW Step
- 19 CPW With a Superstrate
- 20 Double-Layer CPW Line
- 21 Finite-Ground Coplanar Waveguide (FGCPW) Line
- 22 Interdigital Capacitor
- 23 Inverted Microstrip Line
- 24 Loop Inductor
- 25 Metal-Insulator-Metal (MIM) Capacitor
- 26 Microstrip Butterfly Stub
- 27 Microstrip Cross
- 28 Microstrip Gap
- 29 Microstrip Line
- 30 Microstrip Mitered Bend
- 31 Microstrip Open End
- 32 Microstrip Radial Stub
- 33 Microstrip Right-Angeled Bend
- 34 Microstrip Slit
- 35 Microstrip Step
- 36 Microstrip Tee
- 37 Microstrip Via
- 38 Off-Center Stripline
- 39 Spiral Inductor
- 40 Stripline
- 41 Stripline Gap
- 42 Stripline Mitered Bend
- 43 Stripline Open End
- 44 Stripline Right-Angled Bend
- 45 Stripline Step
- 46 Stripline Tee
- 47 Suspended Microstrip Line
- 48 Twin-Lead Line
- 49 Twisted-Pair Line
Bond Wire Above Ground
This is a two-pin, one-port device that models a bond wire including the ground effect.
Model Identifier: BondWire-Free
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
r | wire radius | mm | 0.1 | |
l | pad spacing | mm | 1.0 | |
h | height above ground | mm | 1.0 | |
sigma | wire conductivity | S/m | 1e8 |
Bond Wire (Free-Space)
This is a two-pin, one-port device that models a bond wire with no ground effect.
Model Identifier: BondWire-Free
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
r | wire radius | mm | 0.1 | |
l | pad spacing | mm | 1.0 | |
sigma | wire conductivity | S/m | 1e8 |
Chip Resistor
This is a four-pin, two-port device that models a semiconductor chip resistor. The resistor is made of a thin film deposited between two Ohmic pads on a dielectric substrate.
Model Identifier: chip resistor
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | thin film width | mm | 1.0 | |
l | thin film length | mm | 2.0 | |
d | thin film thickness | mm | 0.1 | |
sigma | thin film conductivity | S/m | 5.0 | |
wp | Ohmic pad width | mm | 2.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 |
Coaxial Line
This is a four-pin, two-port device that models a coaxial line segment with a dielectric core.
Model Identifier: coaxial-line
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
r_in | inner conductor radius | mm | 5.0 | |
r_out | outer conductor radius | mm | 10.0 | |
er | core dielectric relative permittivity | - | 2.2 | |
len | coaxial line length | mm | 10.0 | |
sigma | metal conductivity | S/m | 1e10 | |
tand | core dielectric loss tangent | - | 0 |
Coaxial Step in Inner Conductor
This is a four-pin, two-port device that models a step in inner conductor radius between two coaxial lines of equal outer conductor radius with a dielectric core.
Model Identifier: coaxial-innerstep
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
r_in1 | smaller inner conductor radius | mm | 2.0 | |
r_in2 | larger inner conductor radius | mm | 4.0 | |
r_out | outer conductor radius | mm | 5.0 | |
er | core dielectric relative permittivity | - | 2.2 |
Coaxial Step in Outer Conductor
This is a four-pin, two-port device that models a step in outer conductor radius between two coaxial lines of equal inner conductor radius with a dielectric core.
Model Identifier: coaxial-outerstep
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
r_in | inner conductor radius | mm | 2.0 | |
r_out1 | smaller outer conductor radius | mm | 4.0 | |
r_out2 | larger outer conductor radius | mm | 6.0 | |
er | core dielectric relative permittivity | - | 2.2 |
Conductor-Backed CPW Line
This is a four-pin, two-port device that models a conductor-backed coplanar waveguide (CPW) line segment on a single-layer dielectric substrate with a ground plane.
Model Identifier: cbcpw-line
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | slot width | mm | 2.0 | |
s | center strip width | mm | 2.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
len | cpw line length | mm | 10.0 |
Coplanar Strips (CPS) Line
This is a four-pin, two-port device that models a coplanar strips (CPS) line segment on a single-layer conductor-backed dielectric substrate.
Model Identifier: cps-line
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | strip width | mm | 2 | |
w | strip spacing | mm | 2 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
len | line segment length | m | 10 |
Coplanar Waveguide (CPW) Line
This is a four-pin, two-port device that models a coplanar waveguide (CPW) line segment on a single-layer dielectric substrate without a ground backing.
Model Identifier: cpw-line
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | slot width | mm | 2.0 | |
s | center strip width | mm | 2.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
len | cpw line length | mm | 10.0 | |
sigma | metal conductivity | S/m | 1e10 | |
tand | substrate dielectric loss tangent | - | 0 | |
t | metallization thickness | mm | 0 |
Coupled Microstrip Lines
This is an eight-pin, four-port device that models two parallel coupled microstrip line segments on a single-layer conductor-backed dielectric substrate.
Model Identifier: coupled-microstrips
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | microstrip width | mm | 4.8 | |
s | microstrip spacing | mm | 5.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
len | microstrip length | mm | 10.0 |
Coupled Striplines
This is an eight-pin, four-port device that models two side-by-side parallel coupled stripline segments sandwiched between two parallel plates with a dielectric spacer. In this model, the two striplines are placed at the center of the dielectric with equal distances from the top and bottom plates.
Model Identifier: coupled-striplines
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | microstrip width | mm | 4.8 | |
s | microstrip spacing | mm | 5.0 | |
b | parallel plate spacing | mm | 3.2 | |
er | substrate relative permittivity | - | 2.2 | |
len | stripline length | mm | 10.0 |
Covered CPW Line
This is a four-pin, two-port device that models a covered coplanar waveguide (CPW) line segment on a single-layer dielectric substrate without a ground backing but with a metal cover plate.
Model Identifier: cpw-covered
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | slot width | mm | 2.0 | |
s | center strip width | mm | 2.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
hc | cover height | mm | 10 | |
len | cpw line length | mm | 10 |
Covered Conductor-Backed CPW Line
This is a four-pin, two-port device that models a covered conductor-backed coplanar waveguide (CPW) line segment on a single-layer dielectric substrate with both a ground plane and a metal cover plate.
Model Identifier: cbcpw-line
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | slot width | mm | 2.0 | |
s | center strip width | mm | 2.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
hc | cover height | mm | 10 | |
len | cpw line length | mm | 10 |
Covered Microstrip Line
This is a four-pin, two-port device that models a covered microstrip line segment on a single-layer conductor-backed dielectric substrate.
Model Identifier: microstrip-covered
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | microstrip width | mm | 4.8 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
h | cover height | mm | 10 | |
len | microstrip length | m | 10 |
CPW Gap
This is a four-pin, two-port device that models a gap-in-width transition between two coplanar waveguide (CPW) lines on a single-layer dielectric substrate without a ground backing.
Model Identifier: cpw-gap
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | slot width | mm | 2.0 | |
s | center strip width | mm | 2.0 | |
g | center strip gap spacing | mm | 2.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 |
CPW Open End
This is a two-pin, one-port device that models a coplanar waveguide (CPW) line segment terminated in a open end on a single-layer dielectric substrate without a ground backing.
Model Identifier: cpw-open
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | slot width | mm | 2.0 | |
s | center strip width | mm | 2.0 | |
h | substrate thickness | n mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
len | cpw line length | mm | 10.0 |
CPW Short End
This is a two-pin, one-port device that models a coplanar waveguide (CPW) line segment terminated in a short end on a single-layer dielectric substrate without a ground backing.
Model Identifier: cpw-short
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | slot width | mm | 2.0 | |
s | center strip width | mm | 2.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
len | cpw line length | mm | 10.0 |
CPW Step
This is a four-pin, two-port device that models a step-in-width transition between two coplanar waveguide (CPW) lines of unequal widths on a single-layer dielectric substrate without a ground backing.
Model Identifier: cpw-step
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | narrower slot width | mm | 2.0 | |
s | wider center strip width | mm | 2.0 | |
s | narrower center strip width | mm | 1.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 |
CPW With a Superstrate
This is a four-pin, two-port device that models a coplanar waveguide (CPW) line segment on a single-layer dielectric substrate without a ground backing but with a single-layer dielectric superstrate.
Model Identifier: cpw-superstrate
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | slot width | mm | 2.0 | |
s | center strip width | mm | 2.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
hs | superstrate height | mm | 1.6 | |
ers | superstrate relative permittivity | - | 2.2 | |
len | cpw line length | mm | 10 |
Double-Layer CPW Line
This is a four-pin, two-port device that models a coplanar waveguide (CPW) line segment on a double-layer dielectric substrate without a ground backing.
Model Identifier: cpw-doublelayer
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | slot width | mm | 2.0 | |
s | center strip width | mm | 2.0 | |
h1 | lower layer substrate thickness | mm | 1.6 | |
er1 | lower layer substrate relative permittivity | - | 2.2 | |
h2 | upper layer substrate thickness | mm | 1 | |
er2 | upper layer substrate relative permittivity | - | 3.0 | |
len | cpw line length | mm | 10 |
Finite-Ground Coplanar Waveguide (FGCPW) Line
This is a four-pin, two-port device that models a coplanar waveguide (CPW) line segment with top ground strips of finite width on a single-layer dielectric substrate without a ground backing.
Model Identifier: fgcpw-line
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | slot width | mm | 2.0 | |
s | center strip width | mm | 2.0 | |
g | ground strip width | mm | 5.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
len | cpw line length | mm | 10.0 |
Interdigital Capacitor
This is a four-pin, two-port device that models a planar interdigital capacitor.
Model Identifier: interdigital
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | finger strip width | mm | 0.1 | |
s | finger strip spacing | mm | 0.1 | |
N | number of fingers | - | 5 | |
l | capacitor length | mm | 1.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 |
Inverted Microstrip Line
This is a four-pin, two-port device that models an inverted microstrip line segment on a single-layer dielectric slab/substrate placed at a specified height above a ground plane.
Model Identifier: microstrip-inverted
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | microstrip width | mm | 4.8 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
b | microstrip height above ground | mm | 1.6 | |
len | microstrip length | m | 10 |
Loop Inductor
This is a four-pin, two-port device that models a planar microstrip-based loop inductor.
Model Identifier: loop
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | loop radius width | mm | 1 | |
l | spacing | mm | 4 | |
h | dielectric substrate thickness | mm | 1.6 |
Metal-Insulator-Metal (MIM) Capacitor
This is a four-pin, two-port device that models a semiconductor metal-insulator-metal (MIM) capacitor. The capacitor is made of a high permittivity thin film deposited on a microstrip line printed on a conductor-backed dielectric substrate.
Model Identifier: mimcap
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | microstrip width | mm | 2.0 | |
l | thin film length | mm | 4.0 | |
d | thin film thickness | mm | 0.2 | |
erd | thin film relative permittivity | - | 20.0 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 |
Microstrip Butterfly Stub
This is a two-pin, one-port device that models a microstrip butterfly stub on a single-layer conductor-backed dielectric substrate.
Model Identifier: microstrip-butterfly
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
ri | inner radius | mm | 2 | |
ro | outer radius | mm | 10 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
theta | wedge angle | mm | 90 |
Microstrip Cross
This is an eight-pin, four-port device that models a cross junction between four microstrip lines on a single-layer conductor-backed dielectric substrate. In this model, the two horizontal arms represent Ports 1 and 2 and must be of equal widths. Similarly, the two vertical arms represent Ports 3 and 4 and must be of equal widths.
Model Identifier: microstrip-cross
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w1 | horizontal arm microstrip width | mm | 4.8 | |
w2 | vertical arm microstrip width | mm | 4.8 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 |
Microstrip Gap
This is a four-pin, two-port device that models a gap between two microstrip lines of equal width on a single-layer conductor-backed dielectric substrate.
Model Identifier: microstrip-gap
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w1 | wider microstrip width | mm | 4.8 | |
w2 | narrower microstrip width | mm | 4.8 | Must satisfy w2 < w1 |
s | gap spacing | mm | 2.4 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 |
Microstrip Line
This is a four-pin, two-port device that models a microstrip line segment on a single-layer conductor-backed dielectric substrate.
Model Identifier: microstrip-line
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | microstrip width | mm | 4.8 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
len | microstrip length | mm | 10.0 | |
sigma | microstrip conductivity | S/m | 1e10 | |
tand | substrate dielectric loss tangent | - | 0 | |
t | metallization thickness | mm | 0 | |
disp | flag for dispersive model | - | 0 | Select 0 for non-dispersive line, 1 for dispersion effects. |
Microstrip Mitered Bend
This is a four-pin, two-port device that models a mitered bend connecting two microstrip lines of equal width on a single-layer conductor-backed dielectric substrate.
Model Identifier: microstrip-miter
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | microstrip width | mm | 4.8 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 |
Microstrip Open End
This is a two-pin, one-port device that models a microstrip line segment on a single-layer conductor-backed dielectric substrate, which is terminated at an open end.
Model Identifier: microstrip-open
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | microstrip width | mm | 4.8 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
len | microstrip length | mm | 10.0 |
Microstrip Radial Stub
This is a two-pin, one-port device that models a microstrip radial stub on a single-layer conductor-backed dielectric substrate.
Model Identifier: microstrip-radial
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
ri | inner radius | mm | 2 | |
ro | outer radius | mm | 10 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
theta | wedge angle | mm | 90 |
Microstrip Right-Angeled Bend
This is a four-pin, two-port device that models a right-angled bend connecting two microstrip lines of equal width on a single-layer conductor-backed dielectric substrate.
Model Identifier: microstrip-bend
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | microstrip width | mm | 4.8 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 |
Microstrip Slit
This is a four-pin, two-port device that models a microstrip slit or a narrow cut on a single-layer conductor-backed dielectric substrate.
Model Identifier: microstrip-slit
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | microstrip width | mm | 4.8 | |
a | slit depth | mm | 2 | |
b | slit width | mm | 1 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 |
Microstrip Step
This is a four-pin, two-port device that models a step-in-width transition between two microstrip lines of unequal widths on a single-layer conductor-backed dielectric substrate. Note that Port 1 should represent the wider microstrip line.
Model Identifier: microstrip-step
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w1 | wider microstrip width | mm | 4.8 | |
w2 | narrower microstrip width | mm | 2.5 | Must satisfy w2 < w1. |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 |
Microstrip Tee
This is a six-pin, three-port device that models a tee junction between three microstrip lines on a single-layer conductor-backed dielectric substrate. Note that Ports 1 and 2 should represent the main arm of the tee junction, while Port 3 represents the side arm. The microstrip lines at Ports 1 and 2 have the same width in this model.
Model Identifier: microstrip-tee
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w1 | main arm microstrip width | mm | 4.8 | |
w2 | side arm microstrip width | mm | 4.8 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 |
Microstrip Via
This is a two-pin, one-port device that models a microstrip line segment on a single-layer conductor-backed dielectric substrate, which is shorted to the ground at its end using a metal via.
Model Identifier: microstrip-via
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
r | via radius | mm | 1.0 | |
h | substrate thickness | mm | 1.6 |
Off-Center Stripline
This is a four-pin, two-port device that models an off-center stripline segment sandwiched between two parallel plates with a dielectric spacer. In this model, the stripline is placed below the centerline and closer to the bottom plate.
Model Identifier: stripline-offcetner
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | strip width | mm | 4.5 | |
s | offset from center line | mm | 0.5 | |
t | strip thickness | mm | 3.2 | |
b | parallel plate spacing | mm | 3.2 | |
er | substrate relative permittivity | - | 2.2 | |
len | stripline length | mm | 10.0 |
Spiral Inductor
This is a four-pin, two-port device that models a planar spiral inductor.
Model Identifier: spiral
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | strip width | mm | 0.1 | |
s | spacing | mm | 0.1 | |
D_out | outer diameter | mm | 5.0 | |
N | number of turns | - | 10 |
Stripline
This is a four-pin, two-port device that models a stripline segment sandwiched between two parallel plates with a dielectric spacer. In this model, the stripline is placed at the center of the dielectric with equal distances from the top and bottom plates.
Model Identifier: stripline
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | strip width | mm | 4.8 | |
b | parallel plate spacing | mm | 3.2 | |
er | substrate relative permittivity | - | 2.2 | |
len | stripline length | mm | 10.0 | |
sigma | metal conductivity | S/m | 1e10 | |
tand | substrate dielectric loss tangent | - | 0 | |
t | strip thickness | mm | 0 |
Stripline Gap
This is a four-pin, two-port device that models a gap between two aligned striplines of the same width sandwiched between two parallel plates with a dielectric spacing.
Model Identifier: stripline-gap
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | strip width | mm | 4.8 | |
s | gap spacing | mm | 2 | |
b | parallel plate spacing | mm | 3.2 | |
er | substrate relative permittivity | - | 2.2 |
Stripline Mitered Bend
This is a four-pin, two-port device that models an optimally mitered stripline bend sandwiched between two parallel plates with a dielectric spacing.
Model Identifier: stripline-miter
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | strip width | mm | 4.8 | |
b | parallel plate spacing | mm | 3.2 | |
er | substrate relative permittivity | - | 2.2 |
Stripline Open End
This is a two-pin, one-port device that models a stripline segment sandwiched between two parallel plates with a dielectric spacing, which is terminated at an open end.
Model Identifier: stripline-open
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | strip width | mm | 4.8 | |
b | parallel plate spacing | mm | 3.2 | |
er | substrate relative permittivity | - | 2.2 | |
len | strip length | mm | 10.0 |
Stripline Right-Angled Bend
This is a four-pin, two-port device that models a right-angled stripline bend sandwiched between two parallel plates with a dielectric spacing.
Model Identifier: stripline-bend
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | strip width | mm | 4.8 | |
b | parallel plate spacing | mm | 3.2 | |
er | substrate relative permittivity | - | 2.2 |
Stripline Step
This is a four-pin, two-port device that models a step-in-width transition between two striplines of unequal widths sandwiched between two parallel plates with a dielectric spacing. Note that Port 1 must represent the wider stripline.
Model Identifier: stripline-step
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w1 | wider strip width | mm | 4.8 | |
w2 | narrower strip width | mm | 2.5 | |
b | parallel plate spacing | mm | 3.2 | |
er | substrate relative permittivity | - | 2.2 |
Stripline Tee
This is a six-pin, three-port device that models a tee junction between three striplines sandwiched between two parallel plates with a dielectric spacing. Note that Ports 1 and 2 should represent the main arm of the tee junction, while Port 3 represents the side arm. The striplines at Ports 1 and 2 have the same width in this model.
Model Identifier: stripline-tee
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w1 | width of main arm strip | mm | 4.5 | |
w2 | width of side arm strip | mm | 5.5 | |
b | parallel plate spacing | mm | 3.2 | |
er | substrate relative permittivity | - | 2.2 |
Suspended Microstrip Line
This is a four-pin, two-port device that models a suspended microstrip line segment on a single-layer dielectric slab/substrate placed at a specified height above a ground plane.
Model Identifier: microstrip-suspended
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
w | microstrip width | mm | 4.8 | |
h | substrate thickness | mm | 1.6 | |
er | substrate relative permittivity | - | 2.2 | |
b | height of substrate above ground | mm | 1.6 | |
len | microstrip length | m | 10 |
Twin-Lead Line
This is a four-pin, two-port device that models a twin-lead line segment in a dielectric medium.
Model Identifier: twin-lead
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
r | wire radius | mm | 1.0 | |
s | wire spacing | mm | 5.0 | |
er | dielectric medium relative permittivity | - | 1.0 | |
len | twin-lead line length | mm | 10.0 | |
sigma | wire conductivity | S/m | 1e10 | |
tand | dielectric medium loss tangent | - | 0 |
Twisted-Pair Line
This is a four-pin, two-port device that models a twisted-pair line segment with a dielectric cover. You need to specify the number of wire twist per unit length in 1/m.
Model Identifier: twisted-pair
Parameters:
NAME | PARAMETER | UNITS | DEFAULT | NOTES |
---|---|---|---|---|
r | wire radius | mm | 1.0 | |
s | wire spacing | mm | 4.0 | |
T | number of twists per length | 1/m | 20 | |
erc | dielectric cover relative permittivity | - | 2.2 | |
erm | dielectric medium relative permittivity | - | 1.0 | |
len | twisted-pair line length | mm | 10.0 | |
sigma | wire conductivity | S/m | 1e10 | |
tand | dielectric cover loss tangent | - | 0 |