190:
308:
34:
262:
284:
226:) for brass, and 7–10 in·lbf (0.8 to 1.1 N·m) for stainless steel connectors. Flats are sometimes also provided on the cable side of the connector assembly so that a second wrench can be used to prevent it from rotating and damaging the joint to the cable. It is also advisable to inspect and clean out loose debris from the internal surfaces with compressed air or a gas duster can before mating.
127:, however this has been extended over time and variants are available to 18 GHz and 26.5 GHz. There are also mechanically compatible connectors such as the K-connector which operate up to 40 GHz. The SMA connector is most commonly used in microwave systems, hand-held radio and mobile telephone antennas and, more recently, with WiFi antenna systems and USB
271:
known as 2.9 mm, K type, or SMK), good up to 46 GHz. These connectors keep the same outside thread as the SMA, so they can potentially be cross-mated, but the precision connector can be easily damaged when mating with low-grade SMA connectors. The precision versions use an air dielectric with appropriately scaled center conductors.
201:(PTFE) dielectric that contacts along the mating plane. Variability in the construction and the mating of the connectors limits the repeatability of the connector impedance. For that reason and that they are just rated for a limited number of connection cycles, an SMA connector is not usually a good choice for
270:
The SMA connector is typically rated for mode-free operation from DC to 18 GHz, though some proprietary versions are rated to 26.5 GHz. For performance above this, other SMA-like connectors are used. These include the 3.5 mm connector, rated to 34 GHz, and the 2.92 mm (also
177:
SMA male connector has a 0.9mm diameter center pin surrounded by barrel with inside threads, and the standard SMA female connector has a center sleeve surrounded by a barrel with outside threads. The centre pin is the same diameter as the centre of RG402 Coax so that connections can be made with no
362:, which are designed to prevent consumers from connecting antennas that provide additional gain and therefore breach Part 15 compliance. However, by 2000, the FCC regarded the connectors as readily available, though delaying its ruling indefinitely. As of 2018, leading manufacturers such as
295:
Reverse-polarity SMA (RP-SMA or RSMA) is a variation of the SMA connector specification that reverses the gender of the interface, as shown in
Figures 1 and 2. The term "reverse polarity" here refers only to the gender of the connector's contact pin, not in any way to the signal polarity.
274:
Beyond 46 GHz, the 2.4 mm, 1.85 mm (also known as V type) and 1.0 mm (also known as W type) connectors exist. These are similar to the SMA connector, but with the geometries incompatibly scaled, and a metric thread to prevent accidental intermating. (But 2.4 mm and
315:
Occasionally, the opposite convention is used to designate the gender of an RP connector: In this situation the female connector has a socket (or sleeve) contact and threads on the outside. Users should take care to check drawings and specifications carefully.
186:("RP") SMA connectors in which the pin and sleeve are swapped so that the "male" RP-SMA has a center sleeve surrounded by an inside-threaded barrel, and the "female" RP-SMA has a center pin and an outside-threaded barrel. See below for a fuller description.
265:
Picture of SMA (left), 3.5 mm (center) and 2.92 mm (right) coaxial connectors. Top: male versions, bottom: female versions. The SMA connector on the left contains a dielectric (the white region) which is absent in the 3.5 mm and 2.92 mm versions of the
299:
The female RP-SMA connector has the same external housing as a standard or conventional female SMA connector, which consists of an outer shell with the threads on the outside; however, the center receptacle is replaced by a male pin.
290:
Female RP-SMA connector: female connector body (outside threads) with a male inner pin contact. A male RP-SMA connector is the opposite in both respects – male connector body (inside threads) with a female inner sleeve
303:
Similarly, the RP-SMA male has threads on the inside like a conventional male, but has a center receptacle instead of the male pin in the middle. Normal SMA connectors are incompatible with RP-SMA connectors.
253: inch (9.5 mm) external threads), as there is only about a 2 mm difference overall in the specifications. Type F cannot be mated with SMA connectors without the use of an adapter.
524:
RADIO FREQUENCY CONNECTOR INTERFACES FOR MIL-DTL-3643, MIL-DTL-3650, MIL-DTL-3655, MIL-DTL-25516, MIL-PRF-31031, MIL-PRF-39012, MIL-PRF-49142, MIL-PRF-55339, MIL-DTL-83517
839:
208:
SMA connectors are rated for up to 500 mating cycles, but to achieve this it is necessary to properly torque the connector when making the connection. A
809:
671:
717:
906:
1287:
949:
586:
484:
275:
1.85 mm connectors are compatible to each other.) These offer mode-free operation to 50, 65, and 110 GHz respectively.
1005:
358:
equipment manufacturers have widely used RP-SMA connectors to comply with specific national regulations, such as those from the
562:
692:
179:
359:
467:
978:
817:
784:
742:
998:
938:
Radio-frequency connectors. Part 15: R.F. coaxial connectors with inner diameter of outer conductor 4.13
153: inch diameter, 36-thread-per-inch threaded barrel. The male is equipped with a hex nut measuring
885:
864:
163: inch (0.3125 inch / 7.9 mm) across opposite flats, thus taking the same wrench as a
143:
The interface dimensions for SMA connectors are listed in MIL-STD-348. The SMA connector employs a
1317:
721:
522:
1159:
411:
198:
20:
1237:
1233:
1228:
1224:
910:
646:
1336:
991:
696:
128:
16:
Coaxial cable connector with semi-precision minimal connector interface developed in the 1960s
1188:
1045:
622:
164:
1110:
116:
108:
763:
597:
446:
8:
538:
219:
311:
SMA male connector, SMA female connector, RP-SMA female connector, RP-SMA male connector
178:
discontinuity, forming the pin from the coax itself. As with most other connectors, the
1177:
1090:
1080:
1030:
1254:
189:
167:
307:
865:"OET clarifies antenna connector requirements for Part 15 Unlicensed Transmitters"
1292:
1035:
132:
1297:
1269:
1150:
1095:
416:
120:
1330:
1214:
1155:
1145:
1140:
1135:
1125:
1120:
1115:
1105:
1085:
1060:
1040:
1018:
421:
406:
397:
393:
388:
384:
112:
33:
1259:
1014:
485:
Anritsu
Microwave K Connector™ and Extended-K Connector™ Instruction Sheets
379:
223:
104:
50:
41:
Standard male SMA connector: male body (inside threads) with male inner pin
983:
886:"OET extends effective date of antenna connector requirement indefinitely"
1219:
1204:
1199:
1193:
1100:
1075:
1070:
1065:
1055:
1050:
497:
426:
401:
261:
230:
229:
SMA connectors must not be confused with the standard household 75-ohm
202:
115:
with a screw-type coupling mechanism. The connector has a 50 Ω
971:
946:) with screw coupling – Characteristic impedance 50 ohms (Type SMA)
80:
182:
corresponds to the innermost electrical component. There are also
367:
363:
101:
73:
1318:"Are All SMA Connectors the Same Size - LenoRF Industry co.,LTD"
283:
218: inch torque wrench is required for this, set to 3–5
718:"Mating Rules for SMA, 2.92mm, 2.4mm, & 3.5mm connectors"
355:
764:"RP-SMA Coax Connectors :: Lighthorse Technologies INC"
370:
are still using RP-SMA connectors on their Wi-Fi equipment.
1264:
907:"HGA7S Support | High Gain Antenna For SMA Connectors"
124:
895:. Federal Communications Commission. September 28, 2000.
135:, particularly at higher frequencies (5 GHz+).
874:. Federal Communications Commission. May 22, 2000.
465:
1328:
243: inch (11 mm) circular or hex; female
527:(B with change 3 ed.). US DOD. 2017-01-22.
810:"RF Connector – RP SMA Connector Introduction"
107:developed in the 1960s as a minimal connector
999:
959:Connectors, plug, electrical, radio frequency
979:What material are the made of SMA connectors
1013:
961:. Military specification sheet MIL-C-39012.
119:. SMA was originally designed for use from
1006:
992:
785:"SMA Female To Reverse SMA Female Adaptor"
515:
1288:Audio and video interfaces and connectors
306:
282:
260:
188:
1329:
466:R. Fuks; A. Weirback (July 14, 2009).
1209:
987:
928:Are all SMA connector the same size?
131:dongles. It is also commonly used in
65:Male: 0.312 in (7.9 mm) HEX
19:For the optical fiber connector, see
743:"Reverse Polarity SMA Antenna Cable"
468:"SMA Connector Frequency Extension"
278:
138:
13:
972:RF Connector Information by WA1MBA
563:"What RF Connectors are Mateable?"
193:Cross section of an SMA mated pair
14:
1348:
965:
233:coax connector (diameters: male
100:) connectors are semi-precision
32:
1310:
1182:
899:
878:
857:
832:
802:
777:
756:
735:
710:
685:
664:
639:
1172:Variations and alternate names
844:US Code of Federal Regulations
615:
579:
555:
531:
490:
478:
459:
447:"SMA Connector Specifications"
439:
1:
909:. Linksys.com. Archived from
432:
256:
720:. 2013-08-05. Archived from
695:. 2011-12-23. Archived from
7:
373:
10:
1353:
931:
18:
1278:
1247:
1168:
1026:
948:. International Standard
197:The SMA connector uses a
85:Typically 0–18 GHz,
84:
79:
72:
69:
64:
61:
56:
49:
46:
31:
87:some up to 26.5 GHz
789:Amphenol Infocom Europe
672:"Amphenol HF SMA range"
647:"Inspecting Connectors"
412:Optical fiber connector
199:polytetrafluoroethylene
123:(0 Hz) to 12
21:Optical fiber connector
312:
292:
267:
194:
129:software-defined radio
98:SubMiniature version A
57:General specifications
1046:Belling-Lee connector
310:
286:
264:
192:
51:RF coaxial connector
766:. Coaxconnector.com
346:RP-SMA female/jack
28:
1251:Old or seldom used
327:Center receptacle
313:
293:
268:
195:
26:
1306:
1305:
820:on March 29, 2013
724:on August 6, 2013
603:on March 31, 2010
472:Microwave Journal
353:
352:
338:RP-SMA male/plug
222:(0.3 to 0.6
180:gender assignment
175:standard-polarity
91:
90:
1344:
1322:
1321:
1314:
1008:
1001:
994:
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921:
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918:
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882:
876:
875:
869:
861:
855:
854:
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850:
836:
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829:
827:
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816:. Archived from
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754:
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699:on July 30, 2012
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643:
637:
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633:
619:
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596:. Archived from
591:
587:"SMA Connectors"
583:
577:
576:
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573:
559:
553:
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549:
543:showmecables.com
539:"SMA Dimensions"
535:
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509:
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488:
482:
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475:
463:
457:
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349:SMA female/jack
343:External thread
332:Internal thread
319:
318:
279:Reverse polarity
252:
251:
247:
242:
241:
237:
217:
216:
212:
184:reverse-polarity
162:
161:
157:
152:
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147:
139:Connector design
36:
29:
25:
1352:
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1327:
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1293:Radio frequency
1274:
1243:
1164:
1022:
1012:
968:
952:60169-15, 1979.
934:
926:
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916:
914:
905:
904:
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888:
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879:
867:
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858:
848:
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840:"47 CFR 15.203"
838:
837:
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653:. March 2, 2007
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516:
507:
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498:"About RTL-SDR"
496:
495:
491:
487:(November 2020)
483:
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133:radio astronomy
86:
42:
24:
17:
12:
11:
5:
1350:
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1298:Radio spectrum
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1153:
1151:TV aerial plug
1148:
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996:
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982:
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966:External links
964:
963:
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955:CECC 22110/111
953:
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898:
877:
856:
831:
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734:
709:
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594:AmphenolRF.com
578:
554:
530:
514:
489:
477:
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437:
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424:
419:
417:MMCX connector
414:
409:
404:
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382:
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351:
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344:
340:
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335:SMA male/plug
333:
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328:
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205:applications.
140:
137:
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54:
53:
48:
44:
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37:
15:
9:
6:
4:
3:
2:
1349:
1338:
1337:RF connectors
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1044:
1042:
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1025:
1020:
1016:
1015:RF connectors
1009:
1004:
1002:
997:
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989:
986:
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977:
976:
973:
970:
969:
960:
957:
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951:
947:
943:
939:
936:
935:
929:
913:on 2014-01-16
912:
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428:
425:
423:
422:MCX connector
420:
418:
415:
413:
410:
408:
407:Coaxial cable
405:
403:
399:
398:TNC connector
395:
394:BNC connector
392:
390:
389:SMC connector
386:
385:SMB connector
383:
381:
378:
377:
371:
369:
365:
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357:
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113:coaxial cable
110:
106:
105:RF connectors
103:
99:
95:
82:
78:
75:
68:
60:
55:
52:
45:
40:
35:
30:
27:SMA connector
22:
1312:
1130:
958:
945:
941:
937:
927:
915:. Retrieved
911:the original
901:
892:
880:
871:
859:
847:. Retrieved
843:
834:
822:. Retrieved
818:the original
814:Wellshow.com
813:
804:
792:. Retrieved
788:
779:
768:. Retrieved
758:
747:. Retrieved
737:
726:. Retrieved
722:the original
712:
701:. Retrieved
697:the original
687:
678:
666:
655:. Retrieved
651:Keysight.com
650:
641:
630:. Retrieved
626:
623:"Inspection"
617:
605:. Retrieved
598:the original
593:
581:
570:. Retrieved
567:keysight.com
566:
557:
546:. Retrieved
542:
533:
523:
517:
506:. Retrieved
504:. 2013-04-11
501:
492:
480:
471:
461:
450:. Retrieved
441:
380:RF connector
354:
314:
302:
298:
294:
287:
273:
269:
228:
207:
203:metrological
196:
183:
174:
172:
142:
97:
93:
92:
38:
1071:Hirose W.FL
1066:Hirose U.FL
849:February 7,
824:February 7,
693:"Terms - C"
679:Amphenol RF
627:Agilent.com
607:February 7,
502:rtl-sdr.com
427:Hirose U.FL
402:N connector
324:Center pin
917:2014-06-02
794:1 December
770:2014-06-02
749:2014-06-02
728:2014-07-31
703:2014-06-02
657:2014-06-02
632:2014-06-02
572:2022-11-22
548:2015-08-29
508:2020-08-29
452:2024-04-16
433:References
257:Variations
745:. DataPro
288:Figure 2.
266:connector
170:hex nut.
117:impedance
109:interface
39:Figure 1.
1331:Category
1282:See also
1234:Twin BNC
1229:Triaxial
1160:Mini-UHF
1091:Microdot
1081:Motorola
1031:7/16 DIN
374:See also
81:Passband
62:Diameter
1265:LEMO 00
1019:coaxial
942:(0.163
932:Sources
893:FCC.gov
872:FCC.gov
368:Linksys
364:Netgear
291:contact
248:⁄
238:⁄
213:⁄
158:⁄
148:⁄
102:coaxial
74:Coaxial
1238:Twinax
1215:RP-TNC
1210:RP-SMA
1183:2.9 mm
1111:QMA/QN
1056:F-type
231:type F
220:in·lbf
1240:(BNC)
1225:Triax
1220:SnapN
1196:(UFL)
1185:(SMA)
1178:10-32
1036:APC-7
889:(PDF)
868:(PDF)
675:(PDF)
601:(PDF)
590:(PDF)
356:Wi-Fi
70:Cable
1270:Musa
1200:IPEX
1189:7 mm
1096:MMCX
851:2016
826:2016
796:2020
609:2016
366:and
111:for
47:Type
1255:EIA
1205:MHF
1194:AMC
1156:UHF
1146:TNC
1141:SMC
1136:SMB
1131:SMA
1126:SHV
1121:MHV
1116:RCA
1106:QLS
1086:MCX
1076:IPX
1061:FME
1041:BNC
950:IEC
360:FCC
224:N·m
168:SAE
125:GHz
94:SMA
1333::
1260:GR
1236:/
1227:/
1158:/
944:in
940:mm
891:.
870:.
842:.
812:.
787:.
677:.
649:.
625:.
592:.
565:.
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