Amphenol
CONCENTRIC
TWINAX
High Frequency Contacts
TABLE OF CONTENTS
• Overview of Amphenol’s High Frequency Contacts
• Cable Systems, Cable Assembly/Testing of Cables
• Cable Usage Guide
MIL-DTL-38999 Circular Connector Overview
Contacts for MIL-DTL-38999 Connectors:
• Quadrax Contacts
• New “Split-Pair” Quadrax Contacts
• Differential Twinax Contacts
Compliant Quadrax and PC Tail Quadrax Contacts
• Quadrax Transition & Differential Twinax Transitional Adapters
• Micro D-Twinax Transition Adapters
• Insert Arrangements for MIL-DTL-38999, Series III
• How to Order, 38999 Series III with Quadrax 100 ohm Contacts
• Coaxial Contacts
• Matched Impedance Coaxial Contacts
• Typical Contact Installation Instructions for Coax Contacts
• High Frequency Contacts (DC to 40 GHz)
• Twinax Contacts
• Triax Contacts
• Coax, Twinax & Triax PC Tail Contacts
• Insert Arrangements for MIL-DTL-38999 Series III Incorporating Coax,
Twinax and Triax Contacts
Standard MIL-DTL-5015 & Heavy Duty MIL-DTL-22992 Circular
Connector Overview
Contacts for Standard MIL-DTL-5015 & Heavy Duty
MIL-DTL-22992 Connectors:
• Coaxial Contacts
• Insert Arrangements for Standard MIL-DTL-5015 and Heavy Duty
MIL-DTL-22992 Incorporating Coax Contacts
• Rectangular Rack & Panel Connectors that incorporate High Speed
• Guide for Selecting High Frequency Contacts and Cables
213-217
218
219-222
223
224-226
227-230
231, 232
233
234-237
238-240
241, 242
243
244-247
248
249
250
251-253
254
255-257
258-260
COAXIAL
“SPLIT-PAIR”
QUADRAX
CONTACT &
CAbLE
New
Featured
mICRO D-TWINAX
TRANSITION ADAPTERS
TWINAX
PC TAIL
TRIAX
DIFFERENTIAL
TWINAX
QUADRAX
261
262, 263
264
265, 266
267
High Frequency Contacts Typical Markets:
•
•
•
•
212
Military & Commercial Aviation
Military Vehicles
Missiles & Ordnance
C4ISR
Amphenol
Aerospace
Contact Amphenol Aerospace for more information at 800-678-0141 • www.amphenol-aerospace.com
Amphenol
®
High Frequency Contacts
Provide High Speed Transmission
Operate in High Frequency Conditions
When you need superior electrical performance plus shielding to eliminate
interference from outside electrical sources in a connector, Amphenol has the
most reliable contact solutions.
Amphenol offers a very wide range of contacts that provide high speed transmission and operate
in high frequency conditions You can be assured of interconnection compatibility when you come
to Amphenol for your contact needs as well as your connector needs Amphenol’s expertise in
interconnection solutions assures that your contacts will mate properly and will perform to the
application specifications of your particular requirements
MIL-DTL-38999 CONNECTORS - The high performance series most ideal for integrating high
speed and high frequency contacts. MIL-DTL-38999, Series I, II and III are by far the choice of
connector for today’s avionics needs - these subminiature family connectors are ideally suited for
the incorporation of shielded contacts.
This catalog section is primarily devoted to the high speed and high frequency contact options for
use in MIL-DTL-38999 Connectors, which include:
Amphenol
Aerospace
38999
III
HD
Dualok
II
I
SJT
A
ccessories
A
quacon
H
erm/Seal
PCB
HigH
Speed
High
Frequency
Size 8 Coaxial
contacts that provide
high frequencies (DC
to 40 GHz) Unique
“Float Mount”
technology maintains
tight mechanical
tolerances
Coaxial
Pin and socket
contacts
designed for
RF/microwave
and shielded
wire applica-
tions Sizes 4,
8, 12 & 16
Concentric
Twinax
Pin and socket
contacts designed for
protection from
magnetic and electro-
static interference
including nuclear
electromagnetic
pulse Sizes 8 & 12
Triax
Pin and socket
contacts
designed for
shielded wire
applications
with 3
conductors
Sizes 8, 10 & 12
Quadrax
Size 8 pin and socket
contacts An outer
contact with 4
strategically spaced
inner contacts
forming two 100 or
150 Ohm matched
impedance
differential pairs
Differential
Twinax
Size 8 pin and socket
contacts An outer
contact with 2 inner
contacts spaced to
form one 100 or 150
Ohm matched
impedance
differential pair
Transition
Adapters
Matched impedance
quadrax and twinax
transition adapters
provide a method of
launching from the
high speed
connectors to PCB
boards
Fiber
Optics
Contacts
Cables
Connectors
eMi Filter
Transient
Other series of connectors from Amphenol Aerospace, in addition to
38999 connectors, can incorporate shielded contacts These include the following
(and are also covered in this catalog section):
• Amphenol
®
Heavy Duty Circular Connectors, MIL-DTL-22992 - with coax contacts
• Amphenol
®
Printed Circuit Board Connectors - Rectangular connectors with
standard low mating force brush contacts can have hybrid arrangements with coax contacts
• LRM Interconnects - Rectangular module and backplane connectors with standard
low mating force brush contacts can have hybrid arrangements with coax contacts
• Amphenol
®
ARINC 600 and R27 Rack & Panel Connectors are available with quadrax, coax,
twinax and differential twinax contacts
The Cable Usage Guide is a key reference to help guide you in selecting the contacts best suited to
your needs Since most shielded wire applications start with a fixed requirement for cable types, the
guide refers you to the Amphenol connector family utilizing contacts which are compatible with the
cable characteristics
For more information on other Amphenol connectors with shielded contacts:
• Amphenol
®
Circular Connectors, MIL-DTL-26482, Series 1 are available with coaxial
contacts, size 8 and 12 for crimp and solder type See catalog 12-070 on-line at www
amphenol-industrial com, or consult Amphenol Industrial Operations
• Amphenol
®
MS/Standard, MIL-DTL-5015 Circular Connectors
are available with size 4, 8 and 12 coax contacts Consult
Amphenol Industrial Operations for more information or on-line at
www amphenol-industrial com
For more information on connectors with fiber optics see the Fiber Optic
section of this catalog or consult Amphenol Aerospace
Amphenol provides the latest technology in high speed contacts - differ-
ential twinax and quadrax contacts, size 8, for use in MIL-DTL-38999
Special* Circular Connectors
*Requires modified connector to accommodate keyed contacts
See High Frequency
Contact Designer’s
Guide at end
of this catalog.
Contact Amphenol Aerospace for more information at 800-678-0141 • www.amphenol-aerospace.com
213
Matrix 2
Matrix|pyle
pyle
Class L
Crimp Rear
Release
Matrix
26482
83723 iii
5015
26500
22992
Back-
Shells
Options
Others
Amphenol
Aerospace
38999
III
HD
Dualok
II
I
SJT
High Speed Quadrax and
New Products/Differential Twinax Contacts
Overview
NEW “Split-Pair” Quadrax Contacts & Cable Assemblies for
MIL-DTL-38999, Series III Circular
Amphenol Aerospace offers the high performance interconnect solution for CAT6A type cable
APPLICATIONS:
• 10/100/1000/10GBASE-T Ethernet
• DVI
• USB 2 0
• Serial Rapid IO (up to 3 125 Gbps)
• PCI-Express 2 0
• HDMI 1 3a
• SATA 2 0 (up to 3 GHz)
See pages 227, 228 for more information
A
ccessories
A
quacon
H
erm/Seal
PCB
New/Featured
MIL-DTL-38999 Series III Connectors
with “Split-Pair” Quadrax Contacts
for use with CAT6A Type Cable
HIgH
SPeeD
Fiber
Optics
Connectors
Micro D-Twinax Transition Adapters
Amphenol now offers differential twinax transition
adapters in smaller sizes that provide
matched impedance interconnection to PCB boards
STYLES INCLUDE:
• Plug- standard length and extended length options
• Straight PCB receptacle, 90° PCB receptacle
• Two jam nut receptacle styles -both with standard
length and extended length options
• Bushing assemble 90° adapter (used with plug or
jam nut receptacle)
See pages 238-240 for more information
Contacts
Cables
Differential Twinax and Quadrax
contacts provide high data transfer
rates, low power consumption, and
excellent EMI capability They offer
controlled impedance of 100 or 150
Ohm and are ideal for use in harsh
environments
eMI Filter
Transient
Matrix 2
26482
DIFFERENTIAL
TWINAX CONTACTS
83723 III
Matrix|Pyle
High speed Differential Twinax contacts consist
of an outer contact with two inner contacts
spaced to form one 100 or 150 Ohm controlled
impedance differential pair See pages 231, 232
for performance data and ordering of Differential
Twinax contacts, and consult Amphenol
Aerospace for more information
Differential Twinax Contact
26500
Pyle
• High speed Quadrax contacts consist of
an outer contact with four inner contacts
spaced to form two 100 or 150 Ohm
controlled impedance differential pair
• Both contacts, when used in Amphenol
MIL-DTL-38999 Series III and ARINC
type connectors, provide an excellent
alternative for harsh environment
applications such as:
• Ethernet 100 Base-T-100 Ohm
• Gigabit Ethernet 1000 Base-T-100 Ohm
• Fibre Channel-150 Ohm
• IEEE1394B FireWire-110 Ohm
QUADRAX CONTACTS
D38999 Series III
Ground Plane
Connectors with
Quadrax PCB
Socket contacts
Crimp Rear
Release
Matrix
D38999 Series III
withQuadraxand
Power Contacts
Quadrax Contact
D38999 Series III
Connectors(standoffshellatrightand
standard shell below) with Quadrax
PC Tail Contacts
Back-
Shells
22992
Class L
5015
Differential Twinax and Quadrax contact options include:
• Crimp or printed circuit board termination
• Established designs to accommodate a variety of cable types and gages
• Ground plane connectors can incorporate quadrax contacts These
connections have conductive inserts that ground the outer conductor of
the contact body to the shell of the connector They accommodate size 8
and 12 shielded contacts of which the size 8 can be quadrax type
See pages 224-226 for performance data of Quadrax contacts Consult Amphenol
Aerospace for further information needed
* Requires modified connector to accommodate keyed contacts
Options
Others
214
Contact Amphenol Aerospace for more information at 800-678-0141 • www.amphenol-aerospace.com
Quadrax Contacts, Quadrax Terminators,
Transition Adapters
Overview
QUADRAX CONTACTS
FOR ARINC
CONNECTORS
Amphenol
Aerospace
38999
Board Level
Connector
with Compliant
Quadrax
Contacts
Amphenol ARINC 600 Rack and Panel
connectors can incorporate high speed
quadrax contacts as well as coax, twinax
and differential twinax contacts R27 Rack
and Panel connectors use the same
contacts as ARINC 600 connectors For
more information about rack and panel
connectors contact Amphenol Aerospace
Quadrax Contact for
ARINC Connectors
BOARD LEVEL
CONNECTORS WITH
COMPLIANT QUADRAX
CONTACTS
III
HD
Dualok
II
I
SJT
A
ccessories
A
quacon
H
erm/Seal
PCB
HigH
Speed
Compliant Quadrax Socket and
PCB Tail Quadrax Pin
Amphenol also provides compliant
quadrax socket contacts and quadrax pin
contacts with PC tails for attaching to
printed circuit boards See page 233 for
more information
Fiber
Optics
Contacts
Cables
Connectors
eMi Filter
Transient
FEED-THROUGH CONNECTOR
WITH QUADRAX CONTACTS
Amphenol’s feed-through connector is
double-ended for through bulkhead applications
Consult Amphenol for more information
Straight Quadrax
Receptacle Contact
Matrix 2
Matrix|pyle
26482
83723 iii
Quadrax Terminators
Amphenol offers a terminator assembly which is a
low reactance, resistive impedance match to the
characteristic impedance of a transmission line It
is used to terminate the far ends of a transmission
line or an open tap so that the energy from signals
traveling down the transmission line is absorbed
within the resistor and not reflected back down the
transmission line causing signal interference
(noise) Consult Amphenol for more information
90° Quadrax Receptacle
and Plug Transition
Adapter
26500
5015
22992
pyle
Class L
Crimp Rear
Release
Matrix
Quadrax Terminator
Transition Adapters
In conjunction with its Differential Twinax and Quadrax contacts, Amphenol
has developed a full line of Transition Adapters in order to facilitate launching of
controlled impedance signals to printed circuit boards These use differential twinax
or quadrax 90° or straight receptacles and they can be either threaded or cable to
board direct The threaded transition adapters provide an ideal method of
disconnecting the differential twinax or quadrax connector from the board
See pages 234-240 for further description, performance data and ordering of
transition adapters
Amphenol’s newest addition to their high speed interconnect product offering is Micro
D-Twinax Transition adapters See page 238-240 for more information
90° Differential Twinax
Receptacle and Plug
Transition Adapter
Contact Amphenol Aerospace for more information at 800-678-0141 • www.amphenol-aerospace.com
215
Back-
Shells
Options
Others
Amphenol
Aerospace
38999
III
HD
Dualok
II
I
SJT
High Speed Coax and Twinax Contacts
Overview
Optional choices, other than standard crimp or solder 500 cycle and 1500 cycle
contacts, are often required for high frequency interconnections Amphenol offers
shielded contacts for RF applications as well as balanced high sensitivity circuits
SHIELDED COAXIAL
CONTACTS
High speed Coax contacts within a
connector provide the shielding
protection, and many cases the
RF/microwave performance,
needed in the circuitry of many
applications
A
ccessories
A
quacon
H
erm/Seal
PCB
Amphenol
®
Shielded Contacts
provide design versatility for
electrical circuitry Shielded contacts
are used to eliminate interference
from outside electrical sources,
when standard crimp or solder contacts
are not enough
Shielded Coax Contacts
HIgH
SPeeD
Fiber
Optics
Connectors
Contacts
Cables
eMI Filter
Transient
All popular series of Amphenol circular connectors
and many rectangular connectors are available with coax contacts Diameters are
standardized in sizes 4, 8, 12 and 16 so that coaxial contacts may be interchanged
with power contacts in connector arrangements which include those sizes Popular
RG cable types and a variety of other commercial coaxial cables can be accommo-
dated See page 244 for coax contact performance data Matched impedance size 12
coax contacts are also available (see page 248) The use of coax contacts within a
connector, compared to the use of individual coaxial/shielded connectors, offers
advantages of savings in space and weight and no cross-mating difficulties Coax and
standard contacts may be mixed within the connector to meet special signal needs
The connector itself offers further protection and environmental integrity through the
grommets and seals used, and coaxial junction is protected by the connector
outer shell
MIL-DTL-38999
Connector with
High Speed Coax
Contacts
Matrix 2
26482
Back-
Shells
High performance shielding
capabilities are available with
Concentric Twinax contacts These
are designed for protection from
magnetic and electrostatic
interference including nuclear
electro-magnetic pulse The contact
is crimp terminable to twisted
shielded cable and is fully scoop-
proof (recessed pins) in MIL-
DTL-38999 connectors The
concentric twinax contact is
engineered to maintain shield
integrity through a multi-pin circular
connector and does not require
contact polarization within the
insert Size 8 concentric twinax
contacts were developed for use in
MIL-STD-1553B Airborne multiplex
data bus applications Ideal for this
application need is the high
performance Tri-Start connector
with its fully scoop-proof feature of
recessed pins
CONCENTRIC
TWINAX
SHIELDED
CONTACTS
Size 8
Coax
Pin Contact
Concentric Twinax Contacts Size 8
83723 III
Matrix|Pyle
22992
Class L
Crimp Rear
Release
Matrix
5015
26500
Pyle
Concentric Twinax
Size 12 Contacts
MIL-DTL-38999 Lanyard “Breakaway”
Connector with Concentric Twinax
Contacts, Qualified for MIL-STD-1760
MIL-DTL-38999
Connector with
Concentric Twinax
Contacts
The concentric twinax contact is crimp terminable to twisted shielded cable Size 12
concentric twinax contacts were developed for SAAB They can be used in any size
12 cavity of D38999 I, II or III or SJT connector
Size 8 & 12 coax, triax or twinax contacts or size 16 coax contacts are available in
Ground Plane Connectors (See photo preceding page) These are
MIL-DTL-38999 Series III connectors for data bus, LAN and coax/triax/twinax
transmission lines with conductive inserts that ground the outer contact conductor to
4
the shell They are sold “less contacts”
Options
Others
216
Contact Amphenol Aerospace for more information at 800-678-0141 • www.amphenol-aerospace.com
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