EMC RFLABS Cable Application Notes Introduction

of 8
CABLE ASSEMBLIES
选型目录:
Company and product introduction
Cable
Semi-Rigid/Conformable/Flexible Cable
Semi-Rigid Low Loss Cable
MIL-C-17/RG Series Cable
LMR Cable
Cable Assembly Options
Cable Application Notes
Cable Engineering Data Introduction
51
Application Notes
Cable Length Definition and Tolerances
6.0 to 11.9
12.0 to 23.9
24.0 to 119.9
120.0 to 167.9
168.0 to 215.9
216.0 to 299.9
300.0 to 599.9
600.0 to UP
+0.5, -0.0
Finished Length Tolerance (inches)
Standard Length (inches)
+0.25, -0.0
+10.0, -0.0
+6.0, -0.0
+3.0, -0.0
+2.5, -0.0
+2.0, -0.0
+1.0, -0.0
Cable Length Definition
The cable length is defined by the length as measured between the following:
Straight Connectors - From reference plane per M39012. If the connector is not covered in this Mil-Spec,
the reference plane is per the connector manufacturer.
Right Angle Connectors - From center line of the inner contact of connector.
Bulkhead - From inside mounting flange of connector.
Cable Length Tolerance (Standard)
Tighter cable length tolerance can be provided at additional cost.
Tightest tolerance available:
Semi-Rigid/Conformable/BJ under 24 inches: ±0.030
Flexible under 24 inches: ±0.075
Note: A tightly controlled length does not assure that the phase will also be controlled (see Phase Matching Option).
52
Application Notes
Cable Pre-Formed Right Angle
Conformable
®
is a registered trademark of Belden
SMA Right Angles
Using either Semi-Rigid or Conformable
®
cable, Smiths Interconnect can pre-bend the cable to form a right angle prior to
soldering a low profile SMA plug onto the cable. The cable must be formed before the connector is soldered on in order to
prevent any weakening or damage to the solder joint. The electrical performance of the pre-form is better than a swept or
cubed right angle connector, and in most cases, is more cost effective.
SMA Right Angles
Using either Semi-Rigid or Conformable
®
cable, Florida RF Labs can pre-bend the cable to form a right angle
before soldering a low profile SMA plug onto the cable. The cable must be bent before the connector is soldered
on to prevent the solder joint from breaking. The electrical performance of the assembly is better than a swept
or cubed right angle connector.
Conformable® is a registered trademark of Belden
53
Application Notes
Connector Product Codes
PRECISION HIGH FREQUENCY
2.4 mm
Plug
(Male)
Straight
50 GHz
MMS
2.4 mm
Bulkhead
(Female)
Straight
50 GHz
MFBS
2.4 mm
Jack
(Female)
Straight
50 GHz
MFS
2.4 mm
Plug
(Male)
Right angle
40 GHz
MMR
GPPO (SMPM)
Bulkhead
(Female)
Straight
50 GHz
SMPMFBS
GPPO (SMPM)
Jack
(Female)
Straight
50 GHz
SMPMFS
GPPO (SMPM)
Jack
(Female)
Right angle
50 GHz
SMPMFR
2.9 mm
Plug
(Male)
Straight
40 GHz
KMS
2.9 mm
Plug
(Male)
Right angle
40 GHz
KMR
2.9 mm
Bulkhead
(Female)
Straight
40 GHz
KFBS
2.9 mm
Jack
(Female)
Straight
40 GHz
KFS
GPO™ (SMP)
Plug
(Male)
Straight
40 GHz
SMPMS
GPO™ (SMP)
Bulkhead
(Female)
Straight
40 GHz
SMPFBS
GPO™ (SMP)
Jack
(Female)
Straight
40 GHz
SMPFS
GPO™ (SMP)
Jack
(Female)
Flange
40 GHz
SMPFF
GPO™ (SMP)
Jack
(Female)
Right angle
40 GHz
SMPFR
3.5 mm
Plug
(Male)
Straight
35 GHz
3MS
3.5 mm
Bulkhead
(Female)
Straight
35 GHz
3FBS
3.5 mm
Jack
(Female)
Straight
35 GHz
3FS
STANDAR
D
7 mm (APC7)
N/A
N/A
Straight
18 GHz
A7
SMA
Plug
(Male)
Straight
18 GHz
SMS
SMA
Plug
(Male)
Right angle
18 GHz
SMR
SMA
Bulkhead
(Female)
Straight
18 GHz
SFBS
SMA
Jack
(Female)
Straight
18 GHz
SFS
TNC
Plug
(Male)
Straight
18 GHz
TMS
TNC
Plug
(Male)
Right angle
18 GHz
TMR
TNC
Bulkhead
(Female)
Straight
18 GHz
TFBS
TNC
Jack
(Female)
Straight
18 GHz
TFS
TYPE N
Plug
(Male)
Straight
18 GHz
NMS
TYPE N
Plug
(Male)
Right angle
18 GHz
NMR
TYPE N
Bulkhead
(Female)
Straight
18 GHz
NFBS
TYPE N
Jack
(Female)
Straight
18 GHz
NFS
TYPE N
Jack
(Female)
Flange
18 GHz
NFFS
BNC
Plug
(Male)
Straight
4 GHz
BMS
BNC
Plug
(Male)
Right angle
4 GHz
BMR
BNC
Bulkhead
(Female)
Straight
4 GHz
BFBS
BNC
Jack
(Female)
Straight
4 GHz
BFS
PKZ
Plug
(Male)
Straight
32 GHz
PKZMS
PKZ
Bulkhead
(Female)
Straight
32 GHz
PKZFBS
PKZ
Jack
(Female)
Straight
32 GHz
PKZFS
VSWR 1.45 max DC to Max Frequency
Gender of the connector is determined by center pin.
* GPO
is a registered trademark of Gilbirt
Series
Code
Max Freq.
Type
Gender
Smiths Interconnect offers a wide range of connectors. Listed below are some of the most commonly used connectors
with their product codes and part numbers for ordering. If you can not find the connector type you need, please consult
the sales department.
VSWR 1.45 max DC to Max Frequency.
Gender of the connector is determined by center pin.
54
Application Notes
Connector Product Codes
SUB-MINIATURES
SSMA
Plug
(Male)
Straight
34 GHz
SSMS
SSMA
Jack
(Female)
Straight
34 GHz
SSFS
SSMA
Plug
(Male)
Right Angle
34 GHz
SSMR
MCX
Plug
(Male)
Straight
6 GHz
MCXMS
MCX
Plug
(Male)
Right Angle
6 GHz
MCXMR
MCX
Bulkhead
(Female)
Straight
6 GHz
MCXFBS
MCX
Jack
(Female)
Straight
6 GHz
MCXFS
MMCX
Plug
(Male)
Straight
6 GHz
MMCXMS
MMCX
Plug
(Male)
Right Angle
6 GHz
MMCXMR
MMCX
Bulkhead
(Female)
Straight
6 GHz
MMCXFBS
MMCX
Jack
Straight
6 GHz
MMCXFS
SMC
Plug
(Male)
Straight
10 GHz
SMCMS
SMC
Plug
(Male)
Right Angle
10 GHz
SMCMR
SMC
Jack
(Female)
Right Angle
10 GHz
SMCFR
SMC
Jack
(Female)
Straight
10 GHz
SMCFS
SMB
Plug
(Male)
Straight
4 GHz
SMBMS
SMB
Plug
(Male)
Right Angle
4 GHz
SMBMR
SMB
Jack
(Female)
Straight
4 GHz
SMBFS
SMB
Jack
(Female)
Right Angle
4 GHz
SMBFR
OTHERS
7/16 DIN
Plug
(Male)
Straight
7.5 GHz
7/16MS
7/16 DIN
Plug
(Male)
Right Angle
7.5 GHz
7/16MR
7/16 DIN
Bulkhead
(Female)
Straight
7.5 GHz
7/16FBS
7/16 DIN
Jack
(Female)
Straight
7.5 GHz
7/16FS
OSSP (BMMA)
Plug
(Male)
Straight
28 GHz
OSSPMS
OSSP (BMMA)
Bulkhead
(Female)
Straight
28 GHz
OSSPFBS
OSSP (BMMA)
Jack
(Female)
Straight
28 GHz
OSSPFS
OSP (BMA)
Plug
(Male)
Straight
22 GHz
BMAMS
OSP (BMA)
Jack
(Female)
Straight
22 GHz
BMAFS
OSP (BMA)
Bulkhead
(Female)
Straight
22 GHz
BMAFBS
SC
Plug
(Male)
Straight
10 GHz
SCMS
SC
Bulkhead
(Female)
Straight
10 GHz
SCFBS
Code
Max Freq.
Type
Gender
Series
Material and Plating
Standard material for high performance connectors is stainless steel, passivated. Gold plated stainless steel is also available
in most cases. Many low frequency or low cost connectors are available in brass with gold, nickel or tri-metal plating.
Passive Intermodulation Concerns
To reduce problems with intermodulation distortion, Smiths Interconnect offers connectors with silver or tri-metal plating
(no nickel) on brass bodies. They can be used with cables that have silver plated copper center and outer conductors.
VSWR 1.45 max DC to Max Frequency.
Gender of the connector is determined by center pin.
55
Application Notes
Connector Interseries Mating
Inner Diameter o
f
Center Length
Connector Bod
y
inches
(
mm
)
inches
(
mm
)
inches (mm)
SMA
0.036 (0.91)
0.100 (25.4)
PTFE (Teflon)
0.161 (4.1)
3.5mm
0.036 (0.91)
0.065 (1.65)
Air
0.138 (3.5)
2.9mm (K)
0.036 (0.91)
0.065 (1.65)
Air
0.115 (2.9)
K-Compatible
(used on K-Jumper
SMA Point & Face
(used on BJ141 cable)
0.138 (3.5)
0.065 (1.65)
PTFE (Teflon)
0.138 (3.5)
Connector
Center Diameter
Dielectric
0.036 (0.91)
0.036 (0.91)
0.065 (1.65)
PTFE (Teflon)
Typical Match in dB
Electrical Mating
(Return Loss)
Comments
SMA to SMA
20-25 dB @ 18 GHz
Fair
SMA to 3.5mm
22-27 dB @ 18 GHz
Good
SMA to 2.9mm
24-29 dB @ 18 GHz
Excellent
SMA to K-Jumper
22-27 dB @ 18 GHz
Good
SMA to SMS-BJ141
22-25 dB @ 18 GHz
Fair
3.5mm to 3.5mm
20-25 dB @ 18 GHz
Fair
3.5mm to 2.9mm
20-24 dB @ 18 GHz
Fair
3.5mm to K-Jumper
20-24 dB @ 18 GHz
Fair
3.5mm to SMS-BJ141
19-23 dB @ 18 GHz
Fair
2.9mm to 2.9mm
21-24 dB @ 18 GHz
Good
2.9mm to K-Jumper
20-24 dB @ 18 GHz
Fair
2.9mm to SMS-BJ141
19-23 dB @ 18 GHz
Fair
Connector Mating
Interseries Mating of Precision Connectors
Mechanical Properties of 0.036 Diameter Center Conductor Connectors
Inner Diameter of
Connector Bod
y
inches (mm)
SMA
0.036 (0.91)
0.100 (25.4)
PTFE (Teflon)
0.161 (4.1)
3.5mm
0.036 (0.91)
0.065 (1.65)
Air
0.138 (3.5)
2.9mm (K)
0.036 (0.91)
0.065 (1.65)
Air
0.115 (2.9)
K-Compatible
(used on K-Jumper
SMA Point & Face
(used on BJ141 cable)
Electrical Properties of 0.036 Diameter Center Conductor Connectors
Typical Match in dB
Electrical Mating
(Return Loss)
Comments
SMA to SMA
20-25 dB @ 18 GHz
Fair
SMA to 3.5mm
22-27 dB @ 18 GHz
Good
SMA to 2.9mm
24-29 dB @ 18 GHz
Excellent
SMA to K-Jumper
22-27 dB @ 18 GHz
Good
SMA to SMS-BJ141
22-25 dB @ 18 GHz
Fair
3.5mm to 3.5mm
20-25 dB @ 18 GHz
Fair
3.5mm to 2.9mm
20-24 dB @ 18 GHz
Fair
3.5mm to K-Jumper
20-24 dB @ 18 GHz
Fair
3.5mm to SMS-BJ141
19-23 dB @ 18 GHz
Fair
2.9mm to 2.9mm
21-24 dB @ 18 GHz
Good
2.9mm to K-Jumper
20-24 dB @ 18 GHz
Fair
2.9mm to SMS-BJ141
19-23 dB @ 18 GHz
Fair
Point and Face Design
Connector Mating
Connector
Center Diameter
inches (mm)
Center Length
inches (mm)
Dielectric
0.138 (3.5)
0.065 (1.65)
PTFE (Teflon)
0.138 (3.5)
0.036 (0.91)
0.036 (0.91)
0.065 (1.65)
PTFE (Teflon)
The five connectors listed here will mate since they all have 0.036 inch diameter mating contact and a common coupling nut size
.
Mechanical properties of these five connectors are shown below:
The difference between the 5 connectors is the length of the mating contact, the dielectric material, and the inside diameter o
f
the connector. The standard SMA plug has a mating contact up to 0.100 inches long, which can engage the female contact
before the connector bodies align the contacts and damage the female contact.
The K-Compatible and the SMA Point and Face both use a mating contact length of 0.065 inches that prevents damage to the
female contact.
Both the K-Jumper and SMS-BJ141 use the center conductor of the cable as the male contact. The cable center conductor has
a 0.036 inch diameter; the conductor is cut and pointed to a length 0.065 inches to form the connector contact. The cable jacke
t
stops midway thru the connector body and is soldered in place. The cable used in the K-Jumper and SMS-BJ141 assemblies
have a stable dielectric, which resists dielectric growth under temperature extremes. The K-Compatible connectors used in K-
Jumper assemblies are designed to mate with 2.9mm and 3.5mm connectors. the frequency limit of the K-Jumper is the cutoff
frequency of the cable around 36 GHz.
Interseries Mating of Precision Connectors
The five connectors listed here will inter-mate since they all have 0.036 inch diameter mating contacts and a common
coupling nut size. Mechanical properties of these five connectors are shown below:
Mechanical Properties of 0.036 Diameter Center Conductor Connectors
The differences between the 5 connectors are the length of the mating contact, the dielectric material, and the inside
diameter of the connector body. The standard SMA plug has a mating contact up to 0.100 inches long, which can engage
the female contact before the connector bodies align the contacts and damage the female contact.
The K-Compatible and the SMA Point and Face both use a mating contact length of 0.065 inches that prevents damage
to the female contact.
Electrical Properties of 0.036
Diameter Center Conductor Connectors
Both the K-Jumper and SMS-BJ141 use the center conductor of the cable as the male contact.
The cable center
conductor has a 0.036 inch diameter; the conductor is cut and pointed to a length of 0.065 inches to form the connector
contact. The cable jacket stops midway through the connector body and is soldered in place. The cable used in the
K-Jumper and SMS-BJ141 assemblies have a stable dielectric, which resists dielectric growth under temperature
extremes.
The K-Compatible connectors used in K-Jumper assemblies are designed to mate with 2.9mm and 3.5mm connectors.
The frequency limit of the K-Jumper is the cutoff frequency of the cable, 35.5 GHz.
Point and Face Design

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