rf coaxial lightning & emp protectionpdf.dzsc.com/20130115/d75x06b999x_2472363.pdf · rf...

M/A-COM Division of AMP Incorporated North America: Tel. (800) 366-2266, Fax (800) 618-8883 Asia/Pacific: Tel. +85 2 2111 8088, Fax +85 2 2111 8087 Europe: Tel. +44 (1344) 869 595, Fax +44 (1344) 300 020

www.macom.com AMP and Connecting at a Higher Level are trademarks.Specifications subject to change without notice.

V5.00

RF Coaxial Lightning & EMPProtection• In-line RF Coaxial Protection Against Lightning & EMP• Ideal Protection for Cellular Infrastructure Equipment• Available in l/4 Stub Tuner or Gas Discharge Tube

Formats• Maintains Protection after Initial Strike or Pulse

M/A-COM offers a complete series of RF Coaxial Lightning &EMP Protection Devices for use in cellular infrastructure appli-cations. EMP (electro-magnetic pulse) occurs primarily as aresult of direct lightning strikes to infrastructure equipmentwhich can produce fast rising electric fields within microseconds. These electric fields induce high voltage pulsesthrough unprotected antennas and coaxial transmission cableswhich can ultimately lead directly to the primary communica-tion equipment. The EMP threat, generated from unpredictablelightning strikes is a serious concern for cellular operatorsaround the world. Damage from a lightning strike can result incostly repair of equipment as well as significant loss of airtimeservice to subscribers.

M/A-COM RF coaxial lightning protection (LP) devices havebeen designed for use in commonly deployed cellular infra-structure including GSM, NAMPS, PCS 1900 and DCS 1800operating formats. The use of coaxial lightning protection hastwo primary benefits for cellular applications. First, RF coaxiallightning protection can easily be inserted into existing infra-structure architecture either as a cable assembly or as an in-line adapter. This facilitates cell site design and retrofitcapabilities. Secondly, the RF coaxial protection has beendesigned to facilitate and not degrade RF performance duringnormal operation of the system.

Surge ProtectorsThese devices incorporate internal gas discharge tube (GDT)technology to provide a low impedance path to discharge theEMP to ground. The GDT is hermetically sealed with an inertgas which is not radioactive and requires no special handling.GDT devices are broadband due to their inherently smallcapacitance and cover frequencies up to 2.5 GHz. Once aGDT device has been activated with an impulse and thevoltage level dissipated, the device becomes inactive and willrequire subsequent maintenance or replacement. Surgeprotectors are available in convenient bulkhead mountingconfigurations with a wide variety of standard interface choicesincluding Type N, 7-16 and SMA.

l/4 Stub Tunersl/4 stub tuners are three port coaxial devices. The third port,extending from the main electrical path, serves as a terminatedshort circuit element at a predetermined distance from the RFtransmission path. This distance is designed to be exactly onequarter wavelength at the desired centering frequency (Fo). l/4stub tuners offer very low VSWR and feature very high attenu-ation of incoming pulses but must be applied across relativelynarrow bandwidths (± 70 MHz). M/A-COM offers standarddesigns for the most popular cellular frequency bands tofacilitate usage without the need for a custom design. Stubtuners offer the greatest protection for sensitive electroniccomponents as they have neither the sparkover or residualvoltage characteristics of GDT devices. Stub tuners areextremely reliable and maintenance free since they incorpor-ate no active components. Standard stub tuner designs existfor GSM, PCS 1900 and DCS 1800 frequencies with a widevariety of connector interfaces such as Type N and 7-16available. Cable assemblies, including low loss cable options,are also available to provide complete in-line solutions for basestation design.

Call your local M/A-COM sales office or global ApplicationsEngineering group for more information on our RF coaxiallightning protection. M/A-COM is an ISO-9001 globallycertified manufacturer.

1307062

RF Coaxial Lightning& EMP Protection Application Information



V5.00

• Ideal for use with GSM, PCS and DCS• Maintenance Free Operation• Low VSWR Within Specified Bandwidth• Configurations include direct attachments to Cable

variants• Optional White Bronze™ Finish

Descriptionl/4 stub tuners are three port coaxial devices which employ ashort circuit element as a means of protection against lightningor EMP strikes. The third port, extending from the side of themain transmission path of the connector, is terminated in ashort circuit at a predetermined distance from the main path.The distance is calculated to be exactly one quarter wave-length (l/4) at the desired centering frequency (Fo).

In order to offer the most flexible solutions for infrastructureapplications, stub tuners are available in either an individualconnector format or as a cable assembly ready for directinstallation into a RF coaxial transmission line. A wide varietyof interface styles are available to meet existing retrofit or newdesign requirements including Type N, and 7-16. Standardcrimp tooling is available to facilitate direct connector termina-tion to RG58 or low loss Times™ T-Flex 402 cables.

Application InformationThe centering frequency is an important selection criteriabecause l/4 stub tuner design techniques restrict the band-width in which acceptable VSWR performance can beachieved. Stub tuners exhibit a v-shaped VSWR response.Typically this bandwidth is 8% of the centering frequency.Specified bandwidth in excess of 8% begins to experiencedegradation of VSWR at the centering frequency. Stub tunersare frequency specific in application as opposed to surgeprotectors which address a wider spectrum of frequencies. Asa result of this restriction, M/A-COM offers a wide range ofstandard stub tuner devices which address commonlydeployed cellular frequency bands such as GSM, NAMPS,PCS 1900 and DCS 1800.

l/4 Stub Tuners

Stub tuners, by the nature of their short circuit designs, do not have a sparkover or residual voltage as found in surgeprotectors. This ensures the greatest levels of protectionagainst repeated lightning or EMP strikes within specifiedfrequency bands. Stub tuners are also extremely reliable andmaintenance free since they contain no active parts. Thischaracteristic can be important when considering the total costof ownership, including the need for replacement or repair ofthe device within difficult to reach infrastructure equipment.

Some alternative plating finishes are available with M/A-COM’sStub Tuner Lightning products. Standard plating finishes areshown within the data sheet, but alternatives are available bycustomer request. Details of M/A-COM’s new “White Bronze”finish are shown in the application notes associated with thisdata sheet. For more detailed information, please contact yourlocal M/A-COM field sales office.



V5.00

RF Coaxial Lightning& EMP Protection Specifications

Requirement Detail (Type-N, 7-16)

Impedance 50ΩVSWR Performance in Band ≤1.2:1Insertion Loss (Typical) ±0.2dBDC Resistance (stub outer to inner) 1mW maxDynamic Voltage @ 250A/ms ≤15VResidual Voltage @ 2500A, 8/20ms ≤15VOuter Conductor Contact Resistance ≤10mVDC Resistance (through-path center contact) 100MW min

Body Parts BrassGasket Silicone RubberFemale Contacts Beryllium CopperMale Contacts BrassInsulators P.T.F.E.

Operating temperature range -45°C to +85°CRelative humidity (non-condensing) up to 100%

Electrical

Materials

Environmental

l/4 Stub Tuners

RF Coaxial Lightning& EMP Protection l/4 Stub Tuners – Product Offering



V5.00

Part Number Cable

N15X12E470X T-Flex402

DCS 1800Type N Clamp Bulkhead Jack

Bandwidth ± 70 MHzCenter Frequency 1795 MHzContact Plating 6,0mm±0,5 SilverBody Plating 6,0mm±0,5 SilverMax Panel 10,00mmCompliant With CECC22210Coupling Torque 0.7-1.1NmProof Torque 1.7NmEndurance 500 Matings

Part Number Cable

D75X13E470X T-Flex402

7-16 Clamp Bulkhead Jack

Bandwidth ± 70 MHzCenter Frequency 1795 MHzContact Plating 6,0mm±0,5 SilverBody Plating 6,0mm±0,5 SilverMax Panel 10,00mmCompliant With CECC22190Coupling Torque 25 - 30NmProof Torque 35NmEndurance 500 Matings

7-16 Jack to 7-16 Bulkhead Jack AdapterBandwidth ± 70 MHzCenter Frequency 1795 MHzContact Plating 6,0mm±0,5 SilverBody Plating White BronzeMax Panel 8,00mmCompliant With CECC22190Coupling Torque 25 - 30NmProof Torque 35NmEndurance 500 Matings

Part Number Cable

N15X18E010X RG58C/U

Type N Crimp Bulkhead Jack


Part Number D75X15B999X

11.0

ACROSS FLATS

.43 LOCKWASHER

ACROSSFLATS

RECOMMENDED MOUNTING HOLE

19.0 .750 HEX NUT

.625-24 UNEF

MAX PANEL THICKNESS ACROSS

FLATS

62.92.48

REF

16.0 .63

DIA

13.6 .54

54.72.15

REF

42.01.65

REF

25.4 1.00

SQ

13.5.53

23.5 .92 REF

10.0 .39

WASHERS

M29 X 1.5

7/16 JACK

RECOMMENDEDMOUNTING HOLE

MAX PANELTHICKNESS

25.4

SQUAREHEX NUT1.034.9

1.37

11.0 ACROSS FLATS.43

GASKET

27.51.08

29.51.16 DIA

38.01.50

DIA REF

27.21.07 REF

72.72.86

REF24.6.97

REF

7.5.30

4.0.16

REF

41.91.65 REF

M29 X 1.5M29 X 1.5


7/16JACK

7/16JACK

MAX PANELTHICKNESS

33.0 SQUARE1.3

CASTLE NUTCOPPER WASHER

30.51.20

3.2.13

17.5.69

77.63.06

REF27.41.08 REF9.1

.36

DIA REF

44.61.76 REF

44.9 1.77

67.02.64

REF

COPPER WASHER


ACROSS FLATS

LOCKWASHER

19.0 HEX NUT.750

.625-24 UNEF


MAX PANELTHICKNESS ACROSS FLATS

CRIMPFERRULE

62.92.48

REF

13.6.54

16.0.63

DIA

23.5.92 REF

10.0.39

25.41.00

SQ

13.5.53

42.01.65 REF

54.72.15 REF



V5.00


DCS 1800Type N Jack to Type N Bulkhead Jack Adapter


GSM7-16 Bulkhead Jack to 7-16 Bulkhead Jack

Bandwidth ± 70 MHzCenter Frequency 925 MHzContact Plating 6,0mm±0,5 SilverBody Plating White BronzeMax Panel 8,00mmCompliant With CECC22190Coupling Torque 25 - 30NmProof Torque 35NmEndurance 500 Matings

PCS 1900Type N Clamp Bulkhead Jack


Type N Crimp Bulkhead Jack


LOCKWASHERCOPPER WASHER

MAX PANELTHICKNESS

ACROSS FLATS

.625-24 UNEF (2 PLACES)

19.0 HEX NUT.750

ACROSSFLATS


42.01.65 REF

54.72.15 REF

23.5.93 REF

57.32.26

REF

13.5.53

25.41.00 SQ

13.6.54

16.0.63

DIA

10.0.39

44.91.77

DIA REF

32.13

17.5.69

93.43.68 REF

77.63.06 REF

27.410.8 REF

9.1.36

33.01.30 SQ.

30.51.20 DIA

RECOMMENDED MOUNTING HOLE

COPPER WASHER

MAX PANEL THICKNESS

7/16 JACK

7/16 JACK

CASTLE NUT

M29X1.5M29X1.5

71.02.79 REF

LOCKWASHER

19.0 HEX NUT.750

MAX PANELTHICKNESS

.625-24 UNEF11.0

ACROSS FLATS

.43

COPPER WASHER

23.5.92 REF

10.0.39


ACROSSFLATS

40.21.58

REF

13.6.54

16.0.63 DIA

ACROSS FLATS13.5.53

25.41.00 SQ

52.92.08

REF

62.92.48

REF


ACROSSFLATS

.625-24 UNEF19.0 HEX NUT.750

MAX PANELTHICKNESS

ACROSS FLATS

CRIMPFERRULE


LOCKWASHER

COPPER WASHER

13.6.54

16.0.63 DIA

52.92.08

REF

40.21.58 REF

25.41.00 SQ62.9

2.48 REF23.5.92

10.0.39

13.5.53

Part Number N15X16E999X


Part Number Cable

N15X09E470X T-Flex 402

Part Number Cable

N15X14E010X RG58 C/U




V5.00

PCS 19007-16 Clamp Bulkhead Jack

Bandwidth 1920 MHzCenter Frequency ± 70 MHzContact Plating 6,00mm ± 0,5 SilverBody Plating 6,00mm ± 0.5 SilverMax Panel 8.00mmCompliant With CECC 22190Coupling Torque 25-30 NmProof Torque 35 NmEndurance 500 Matings

7-16 Bulkhead Jack to 7-16 Bulkhead Jack Adapter

Bandwidth 1920 MHzCenter Frequency ± 70 MHzContact Plating 6,00mm ± 0,5 SilverBody Plating White Bronze™Max Panel 8.00mmCompliant With CECC 22190Coupling Torque 25-30 NmProof Torque 35 NmEndurance 500 Matings

Type N Bulkhead Jack to Type N Bulkhead Jack Adapter Bandwidth ± 70 MHzCenter Frequency 1920 MHzContact Plating 6,0mm±0,5 SilverBody Plating 6,0mm±0,5 SilverMax Panel 10,00mmCompliant With CECC22210Coupling Torque 0.7-1.1NmProof Torque 1.7NmEndurance 500 Matings

GASKET

7/16JACK

ACROSS FLATS

HEX NUT34.91.37


25.4

SQUARE1.00

M29 X 1.5

7.5.30 PANEL

MAX27.41.08 REF

38.01.50

DIA REF 4.0

.16 REF

72.72.86

REF

29.51.16

DIA

27.51.08

24.6.97 REF

40.21.58

REF

11.0.43


TYPE N JACK

TYPE N JACK

ACROSSFLATS

19.0 HEX NUT.750


ACROSS FLATSMAX PANELTHICKNESS

COPPER WASHERLOCKWASHER

10.0.39

16.0.63 DIA

13.6.54

25.41.00 SQ

13.5.53

57.32.26

REF23.5.93

REF

52.72.08

REF

40.01.58 REF

Part Number Cable

D75X12E470X T-Flex402


Part Number N15X17E999X

M29 X 1.5 M29 X 1.5

7/16JACK

7/16JACK

CASTLE NUT

COPPER WASHERRECOMMENDEDMOUNTING HOLE

33.0

SQUARE1.3

MAX PANELTHICKNESS

77.63.06

REF27.41.08 REF9.1

.36

42.21.66

REF

64.62.54

REF

30.51.20

3.2.13

17.5.69

44.91.77

DIA REF



V5.00

RF Coaxial Lightning& EMP Protection Interseries Cable Assemblies – Product Offering

C1: T-Flex 402 or RG-58F1: Frequency Range (GSM, PCS 1900, DCS 1800)I1: 7-16 or N Bulkhead JackI2: SMA, N, 7-16 (Straight, Right Angle Plug or

Bulkhead Jack)L1: Overall Length as SpecifiedM1: Required Marking

M/A-COM

SHRINK SLEEVE (BOTH ENDS)

TYPE N RIGHT ANGLE PLUG, SHOWN FOR REF ONLY (SEE LIST OF CONNECTOR OPTIONS)

MARKER SLEEVE FLEXIBLE CABLE (C1)SEE LIST OF OPTIONS

CABLE LENGTH - MOUNTING SURFACE TO CENTER LINE (RIGHT ANGLES) OR TO REFERENCE PLANE (STRAIGHTS)

I1M1

I2

L1

TYPE N JACK l/4 STUB TUNER CONNECTOR

SHOWN FOR REF ONLY (SEE LIST OF

CONNECTOR OPTIONS)

Materials:Jacket FEP (Fluorinated Ethylene Propylene) PVC(Polyvinyl Chloride)1st Shield Silver Plated Copper Strip Tinned Copper2nd Shield Silver Plated Copper Braid N/ADielectric Extruded Solid Polytetrafluoroethylene Solid PolyethyleneCenter Contact Silver Plated Copper Bare Copper

Minimum Bend Radius: 20.32 mm (.8inch) 25.5 mm (1 inch)

Impedance: 50 ohms 50 ohms

Insertion Loss: .09 dB/Ft; .295dB/m @ 500 MHz .099 dB/Ft; .324 dB/m @ 500MHz.13 dB/Ft; .427 dB/m @ 1GHz .143 dB/Ft; .47 dB/m @ 1 GHz.192 dB/Ft; .629 dB/m @ 2 GHz

Cable Specifications

A variety of options are available to ensure the proper cableassembly selection can be made for your application. Pleasespecify the following parameters below:

T-FLEX 402 RG-58

RF Coaxial Lightning& EMP Protection Application Information



V5.00

• Excellent for Broadband Frequency Applications• Field Replaceable Gas Discharge Tube• Available Interfaces Facilitate Retrofit Capabilities• Low VSWR up to 2.5GHz• Specialized White Bronze™ Finish

DescriptionSurge protectors incorporate hermetically sealed gas dis-charge tube (GDT) technology within the coaxial transmissionline to provide a low impedance path to discharge the EMP toground. The GDT is loaded into the connector housing fromthe side via a weather sealed access port. The GDT does notrequire special handling or safety precautions as the inert gasused is non-radioactive. In an active state, the transverse-mounted GDT introduces some inherent extra capacitancewhich is compensated electrically in the design and does notdegrade overall VSWR performance. As a result, M/A-COMsurge protectors perform well in applications up to 2.5 GHz.

Surge protectors are made active when a high voltage impulsegenerated from a lightning or EMP source appears on thecoaxial line. The electric field produced causes the inert gas to ionize which then creates a very low impedance path toground, thus directing the current away from sensitiveelectronic elements. Once the impulse ceases and the voltagelevel reduces, the GDT becomes inactive again leaving aresidual voltage on the coaxial line. M/A-COM suppliesdevices with a selection of GDT elements to carry 10kA, 20kAor 50kA peak current. In addition, GDT devices are availablewith a wide variety of interfaces such as type N, 7-16 and SMAto facilitate retrofit installation.

Application InformationThe significant advantage of using surge protectors is theirability to handle a wide bandwidth from DC to 2.5 GHz. Appli-cations where multiple frequency bands need to be transmittedat the same time also benefit from the surge protector designcharacteristics, i.e. the device is required to pass DC or lowfrequency AC bias voltages as well as primary transmit orreceive signals, but in addition required to stop high voltageimpulses. In operation, the gas discharge tube continues toexhibit a voltage drop of about 20 volts while the deviceremains in an energized state. It is important to note that therewill be a small period prior to the device becoming active whenhigh energy will be present on the transmission line. This isbecause the ionization of the inert gas is inherently notinstantaneous. The time taken for the GDT to become fullyactive is determined by the rise time of the applied impulse,

Surge Protectors

typically in the order of 1kV/µS, and the impulse sparkovervoltage which is normally 800 volts. Standard devices willtherefore take 800nS typically to reach full condition. Highenergy for this period of time may not be acceptable in someapplications and should be considered as a system designparameter.

GDT techniques employed for lightning or EMP protectionhave a finite life span once activated. When measured, this isfound to be inversely proportional to the level of energy dissi-pated by the device. In tests, the GDT devices will withstandmultiple impulses of 20kA but only a single impulse of 50kA. It is important to note that once failure occurs, the deviceremains a short circuit to guarantee continued protection. Tofacilitate the maintenance and reduce the expense of GDTbased systems, M/A-COM has designed these devices to befield replaceable. Replacement GDT capsules are available forfield installation after a subsequent lightning or EMP strike.Surge protectors have been specifically designed with fully-retained sealed covers which are located in an accessiblelocation to facilitate maintenance. GDT capsules require only astandard wrench for field replacement.

Surge protectors are plated standard with M/A-COM’s special-ized White Bronze™ finish, specially formulated to providecorrosion resistance in potentially aggressive physical environ-ments. White Bronze™ plating is ideal for wireless applicationsdue to its excellent conductivity, and non-ferrous compositionfor low intermodulation characteristics. Detailed applicationnotes are available for proper selection of lightning protectiondevices (surge protectors & stub tuners) as well as inter-modulation and White Bronze™ plating. Please refer to theapplication section at the back of this data sheet for moredetails on availability of these application notes.



V5.00

RF Coaxial Lightning& EMP Protection Specifications

Requirement Detail

Frequency Range DC to 2.5GHzImpedance 50ΩVSWR Performance ≤1.2:1Insertion Loss (Typical) 0.2dBImpulse Discharge Current (8/20µs, multiple strike) 20kAMaximum Impulse Discharge Current (8/20µs, single strike) 50kADynamic Sparkover Voltage, NEMP (1kV/µs) 2,000VDynamic Sparkover Voltage, LEMP (1kV/µs) 800VDynamic Sparkover Voltage, Static (<100V/µs) 230V

Body Parts BrassGaskets Silicone RubberFemale Contacts Beryllium CopperMale Contacts BrassInsulators P.T.F.E.

Operating Temperature Range -45° C to +85° CRelative Humidity up to 100%

Electrical

Materials

Environmental

Surge Protectors

RF Coaxial Lightning& EMP Protection Surge Protector – Product Offering



V5.00

Type-N Jack to SMA Bulkhead Jack Adapter

Surge Protectors

Frequency Range DC to 2.5GHzContact Plating GoldBody Plating White Bronze™Max Panel 10,00mmCompliant With CECC22210/CEC22110Coupling Torque 0.7-1.1NmProof Torque 1.7Nm both endsEndurance 500 Matings

Type-N Bulkhead Jack to Type N Bulkhead Jack Adapter

7-16 Plug to 7-16 Jack Adapter

Gas Discharge Tube Replacement

Frequency Range DC to 2.5 GHzContact Plating GoldBody Plating White Bronze™Max Panel 10,00mmCompliant With CECC22210Coupling Torque 0.7-1.1 NmProof Torque 1.7 NmEndurance 500 Matings

Frequency Range DC to 2.5GHzContact Plating 6,0mm ± 0,5 SilverBody Plating White Bronze™Compliant With CECC22190Coupling Torque 25 - 30 NmProof Torque 35NmEndurance 500 Matings

d.c. Sparkover Voltage: 230V±46VImpulse Sparkover Voltage: 700V typ. (1kV/mS) (900V max)

Glow Discharge Voltage: 72VArc Discharge Voltage: 10Va.c. Discharge Current: 20A(1 sec, 50Hz)Impulse Discharge Current: 20kA (50kA for (8/20mS waveform) one strike)

Insulation Resistance (@100V): 10GWCapacitance: 2pF

.250-36 UNS

.625-24 UNEF

SMA JACKTYPE NJACK

ACROSSFLATS

GASKETLOCKWASHER

19.0 HEX NUT.750


ACROSSFLATS

ACROSSFLATS

MAX PANELTHICKNESS

13.5.53

14.0.55

13.6.54

16.0.63

DIA

25.41.00

SQ53.82.12

REF21.5.85

REF

10.0.39

REFCOPPER WASHER

LOCKWASHER

MAX PANELTHICKNESS

TYPE N JACK TYPE N JACK

ACROSSFLATS


19.0 HEX NUT.750

ACROSSFLATS


7.7.30

15.2.60 REF

21.5.85 REF

21.9.86

53.82.12

REF

13.5.53

25.41.00 SQ

13.6.54

16.0.63

DIA

M29 X 1.5

25.4 SQUARE1.00

7/16 PLUG 7/16 JACK

31.91.25

ACROSS FLATS

56.52.23

REF

34.01.34

DIA REF

Part Number A55X01B999X

Part Number N15X10B999X


Part Number ST127893-98



V5.00

RF Coaxial Lightning& EMP Protection Tools & Adapter

Crimping Tool

Type N Plug to 7-16 Plug

Between Series Adapters

TYPE NPLUG

7/16PLUG


32.0 ACROSS FLATS1.26

20.6.81 DIA REF 34.0

1.34 DIA REF

48.61.91

REF Contact Plating: 6.0mm ± 0.5 SilverBody Plating: White Bronze™

Part Number G30040

Part Number A55P23E999X

Type N Plug to Type N Plug

TYPE NPLUG

TYPE N PLUG

40.51.59

REF

20.6.81 DIA REF

Contact Plating: GoldBody Plating: White Bronze™

Part Number N15P10E999X

RF Coaxial Lightning& EMP Protection Adapters



V5.00

Contact Plating: 0.6mm SilverBody Plating: White Bronze™

Contact Plating: GoldBody Plating: Gold

Part Number A55P24E999X

Part Number 3082-2240-00

Type N Plug to 7-16 Jack

Between Series Adapters cont’d.

SMA to Type N

22.0 ACROSS FLATS.8624.0

ACROSS FLATS.94

TYPE NPLUG

7/16 JACK

M29 X 1.5

20.6.81

DIA REF

51.92.04 REF

TYPE N PLUG


SMA JACK

21.0.83 DIA REF

18.2.72 REF

31.71.25 REF



V5.00

RF Coaxial Lightning& EMP Protection Application Notes

Selecting an RFCoaxial LightningProtection Device

White Bronze™ Plating

Intermodulation

Cable Assemblies

Selecting the best form of RF coaxial lightning protection is critical for yourinfrastructure applications. M/A-COM has developed an application note whichprovides detailed technical information on surge protector and stub tuner lightningprotection products to assist in the understanding and specification of this technology.Application note ID 2012, entitled “Lightning and EMP Protection Devices” is availablefrom your local M/A-COM Sales Office, authorized distributor or directly through ourGlobal Applications Engineering Group.

M/A-COM’s unique Copper, Tin, Zinc alloy finish is a robust plating which is suitablefor applications requiring excellent levels of electrical performance and offers thefollowing attributes:• High Corrosion Resistance• Low Porosity• Non-magnetic Finish• Wear & Scratch Resistant• Low RF Loses• Excellent for intermodulation Sensitive Applications

Application Note ID 1014 entitled “White Bronze” is available from your local M/A-COM Sales Office, authorized distributor or directly through our GlobalApplications Engineering Group.

Dissimilar metals, finishes and discontinuities within a coaxial structure give rise tointermodulation products (IMP). This is of particular concern in applications such ascellular base stations and antennas which require low levels of intermodulation. M/A-COM RF coaxial lightning protection devices were designed with this phenomena inmind and, as such, contain no ferrous or magnetic materials and utilize low porosityWhite Bronze™ plating. Complete in-house capabilities exist for intermodulation testing.

Application note ID1018, entitled “Intermodulation in RF Coaxial Connectors” isavailable from your local M/A-COM Sales Office, authorized distributor or directlythrough Global Applications Engineering Group.

M/A-COM can provide customers with a complete high volume interconnect solutionfor cellular base stations. Our global capabilities to provide cable assemblies facilitateslower cost implementation of lightning protection devices. Our vertically integratedresources ensure consistent and reliable control over all critical processes frommachining and plating to completed assembly. Semi-automated cable trimming andtermination techniques are consistently applied to the manufacturing process tosupport volume capacity and assure repeatable quality. Test capabilities exist forstandard electrical screening such as VSWR and insertion loss as well as specializedtesting for such parameters as intermodulation (IMP).

A wide range of standard cable assembly offerings are listed for reference withinprevious sections of this data sheet. A global staff of Application Engineers areavailable to assist in the proper specification of a cable assembly to suit yourapplication needs. M/A-COM’s extensive experience in the manufacture of coaxialconnectors and cable assemblies can provide cost effective, competitive advantage foryour business.



V5.00


To ensure that proper, low level contact resistance is established between the LP deviceand mounting wall, it is recommended that a minimum torque of 50 in/lbs / 5.65 n/m be applied to tighten the connector mounting nut. A recommended minimum torque of35 in/lbs / 3.95 n/m should also be applied for installation of replacement surge protectorcapsules to ensure proper protection performance.

In order to ensure that resultant currents from lightning or EMP strikes do not interferewith parallel transmission lines within protected electronic equipment, surge protectordevices must be installed with proper orientation. The surge protector side of thedevice should be mounted in the unprotected side of the equipment while themounting nut is positioned internally in the protected area.

It is important when planning lightning protection, that the user can estimate thepotential number of direct strikes. This information may influence the type of deviceselected or the requirement for routine maintenance checks. Significant attention mustbe paid to the height of supporting structure as this, when related to the typicalnumber of thunderstorms in a particular region, allows us to estimate the probability ofa direct strike taking place. To assist our customers in this, the following table andchart has been included in this note. This should enable lightning protection plannersto establish the likelihood of direct strikes across a network anywhere in the world.

Number of Thunderstorm hmax/m hmax/m hmax/mDays per year 10% 20% 50%

05 28 39 6110 18 26 4015 14 20 3120 12 17 2630 9.4 13 2040 7.9 11 1750 6.9 9.5 1570 5.6 8.0 1290 4.8 7.0 10.6130 3.9 5.5 8.5150 3.5 5.0 7.7180 3.1 4.4 6.9

RecommendedMounting Techniques

Surge ProtectorMounting Techniques

Selecting your RFCoaxial LightningProtection Device

Lightning ProtectionPlanning

Table 1: Maximum height of supporting building for a given number of thunderstorm days (whenhmax is exceeded, probability of direct strike to supporting building within 15 years is greater than10% for hmax values given in second column, 20% for hmax values given in third column and50% for hmax values given in the fourth column).



V5.00


World Map of Numberof Thunderstorm DaysPer Year/Per Region



V5.00

AmericasArgentina – Buenos AiresPhone: + 54-1-733-2000Fax: + 54-1-717-0988

Brazil – Sao PauloPhone: + 55-11-861-1311Fax: + 55-11-861-0397

Canada – TorontoPhone: + 1-905-475-6222Fax: + 1-905-474-5520

Europe/Middle East/AfricaAustria – ViennaInside: Phone: + 0222-277-97-0

Fax: + 0222-270-26-61Outside: Phone: + 43-1-277-97-0

Fax: + 43-1-270-26-61

Belgium – BrusselsPhone: + 32-2-719-2511Fax: + 32-2-725-4928

Bulgaria – SofiaPhone: + 359-2-971-2152Fax: + 395-2-971-2153

Croatia – ZagrebPhone: + 385-1-67-04-46Fax: + 385-1-69-16-04

Czech Republic – KurimPhone: + 420-5-41-162-111Fax: + 420-5-41-162-223

Denmark – VibyPhone: + 45-86-295-055Fax: + 45-86-295-133

Egypt – CairoPhone: + 202-417-76-47Fax: + 202-419-23-34

Estonia – TallinnPhone: + 372-6205-800Fax: + 372-6205-804

Finland – HelsinkiPhone: + 358-9-512-3420Fax: + 358-9-512-34250

France – PontoisePhone: + 33-1-34-20-88-88Fax: + 33-1-34-20-86-00

Germany – LangenPhone: + 49-6103-709-0Fax: + 49-6103-709-223

Related BusinessesM/A-COM DivisionAmericasLowell, MA, USAPhone: + 1- 978-442-5000Fax: + 1-978-442-5354Europe/Middle East/AfricaBracknell, EnglandPhone: + 44-1344-869-595Fax: + 44-1344-300-020Asia/PacificHong KongPhone: + 85-2-2111-8088Fax: + 85-2-2111-8087

AMP Business Centers, Worldwide

Chile – SantiagoPhone: + 56-2-236-4267Fax: + 56-2-235-0061

Columbia – BogataPhone: + 57-1-369-0045Fax: + 57-1-269-7525

Mexico – Mexico CityPhone: + 52-5-398-76-11Fax: + 52-5-398-79-64

United States – Harrisburg, PA Phone: + 1-717-564-0100Fax: + 1-717-986-7575

For Latin/South AmericanCountries not shownPhone: +54-1-733-2015Fax: +54-1-733-2083

Great Britain – LondonPhone: + 44-181-954-2356Fax: + 44-181-954-6234

Greece – AthensPhone: + 30-1-902-5515Fax: + 30-1-902-4237

Holland – ’s-HertogenboschPhone: + 31-73-624-6246Fax: + 31-73-621-2365

Hungary – BudapestPhone: + 36-1-344-2633Fax: + 36-1-344-2634

Ireland – DublinPhone: + 353-1-820-3000Fax: + 353-1-820-9790

Israel – Tel AvivPhone: + 972-3-645-07-07Fax: + 972-3-649-24-13

Italy – TorinoPhone: + 39-11-4012-111Fax: + 39-11-4031-116

Lithuania – VilniusPhone: + 370-2-231402Fax: + 370-2-231403

Norway – OsloPhone: + 47-66-77-88-50Fax: + 47-66-77-88-55

Poland – WarsawPhone: + 48-22-672-47-90/91/92Fax: + 48-22-672-47-88

Portugal – LisbonPhone: + 351-1-387-70-16Fax: + 351-1-387-71-72

Romania – BucharestPhone: + 40-1-311-3479/3596Fax: + 40-1-312-0574

RussiaMoscowPhone: + 7-095-926-5506/07/08/09Fax: + 7-095-926-5505

St. PetersburgPhone: + 7-812-325-3083Fax: + 7-812-326-3288

Slovakia – BystricaPhone: + 421-88-761-120/121Fax: + 421-88-761-122

Slovenia – LjubljanaPhone: + 386-61-161-3270Fax: + 386-61-161-3240

South Africa – JohannesburgPhone: + 27-11-805-65-35Fax: + 27-11-805-65-40

Spain – BarcelonaPhone: + 34-3-291-0330Fax: + 34-3-201-7879

Sweden – StockholmPhone: + 46-8-580-833-00Fax: + 46-8-580-194-70

Switzerland – SteinachPhone: + 41-71-447-0447Fax: + 41-71-447-0444

Turkey – IstanbulPhone: + 90-212-281-8181Fax: + 90-212-281-8184

For Middle East/AfricanCountries not shownPhone: +33-1-34-20-83-83Fax: +33-1-34-20-86-09

Asia/PacificAustralia – SidneyPhone: + 61-2-9840-8200Fax: + 61-2-9899-5649

India – BangalorePhone: + 91-80-845-3014Fax: + 91-80-845-3038

Indonesia – JakartaPhone: + 6221-526-7852Fax: + 6221-526-7856

Japan – TokyoPhone: + 81-44-844-8111Fax: + 81-44-812-3207

Korea – SeoulPhone: + 82-3274-0535Fax: + 82-3274-0524

Malaysia – Kuala LampurPhone: + 603-705-3055Fax: + 603-705-3066

New Zealand – AucklandPhone: + 64-9-634-4580Fax: 64-9-634-4586

Peoples Republic of ChinaHong KongPhone: + 852-2-35-1628Fax: + 852-2-35-0243ShanghaPhone: + 86-21-6485-0602Fax: + 86-21-6485-0728ShundePhone: + 86-765-7751368Fax: + 86-765-7752823

Philippines – ManilaPhone: + 632-811-0437Fax: + 632-811-0441

Singapore – SingaporePhone: + 65-482-0311Fax: + 65-482-1012

Taiwan – TaipeiPhone: + 886-2-704-4815Fax: + 886-2-704-4940

Thailand – BangkokPhone: + 91-662-513-9888Fax: + 91-662-513-9889

Vietnam – Ho Chi Minh CityPhone: + 84-8823-2546Fax: + 84-8823-1443

www.amp.comwww.macom.com

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