 Figure 1. Standard male SMA connector: male body (inside threads) with male inner pin | |||
| Type | RF coaxial connector | ||
|---|---|---|---|
| General specifications | |||
| Diameter | Male: 0.312 in (7.9 mm) HEX | ||
| Cable | Coaxial | ||
| Passband |
Typically 0–18 GHz, some up to 26.5 GHz | ||
SMA (SubMiniature version A) connectors are semi-precision coaxial RF connectors developed in the 1960s as a minimal connector interface for coaxial cable with a screw-type coupling mechanism. The connector has a 50 Ω impedance.[1] SMA was originally designed for use from DC (0 Hz) to 12 GHz, however this has been extended over time and variants are available to 18 GHz and 26.5 GHz.[2] There are also mechanically compatible connectors such as the K-connector which operate up to 40 GHz.[3] 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 software-defined radio dongles.[4] It is also commonly used in radio astronomy, particularly at higher frequencies (5 GHz+).
- ^ "SMA Connector Specifications". Retrieved 2024-04-16.
- ^ R. Fuks; A. Weirback (July 14, 2009). "SMA Connector Frequency Extension". Microwave Journal.
- ^ Anritsu Microwave K Connector™ and Extended-K Connector™ Instruction Sheets (November 2020)
- ^ "About RTL-SDR". rtl-sdr.com. 2013-04-11. Retrieved 2020-08-29.