Mating Rules for SMA, 2.92mm, 2.4mm, & 3.5mm connectors
| |
SMA (1) |
2.92mm |
3.5mm |
2.4mm |
| DIELCTRIC |
TEFLON |
AIR |
AIR |
AIR |
| OUTER COND. INNER DIA. |
|
2.92mm |
3.5mm |
2.4mm |
| MALE PIN DIA. (2) MAX/MIN |
.0370/.0355 |
.0365/.0355 |
.0365/.0355 |
.0205/.0195 |
| MALE PIN DIA. (3) |
|
.050 |
.060 |
|
| FEMALE THREAD |
.250-36 |
.250-36 |
.250-36 |
M 7.0 X .75-6G |
| NORMAL F-MAX |
18 GHZ |
40 GHZ |
34 GHZ |
50 GHZ |
SMAS, 2.92's, & 3.5mm's can be mated, many of our customers very carefully mate these connectors. However a damaged or out of spec SMA can damage a 2.92 or 3.5, their air dielectric construction makes them very fragile. With SMA's the pin engages first, the threads second; 2.92's & 3.5's are the opposite, that is threads mate first, pins second. For very precise measurements, connecting different types of connectors results in a small but measurable discontinuity; VNA work should usually use adapters of similar construction.
Notes:
(1) Some enhanced SMA's work to 26.5 gHz
(2) SOME PINS ARE "STEPPED" IN SIZE; THE DIMENSION ABOVE REFERS TO THE PORTION OF THE PIN THAT MATES WITH THE FEMALE.
(3) THIS IS THE DIAMETER OF THE BASIC PIN, EXCEPT FOR THE MATING PORTION
|
