12/25/2023 0 Comments Sma connector![]() They are designed to connect by soldering or crimping to semi-rigid coaxial cable. These antennas are capable of intercepting electromagnetic energy and translating it into electrical current and vice versa. An SMA connector serves as the primary channel through which radio frequency signals can flow between the antenna and the device it is attached to. SMA antennas are a diverse group of radio frequency antennas that possess an SMA connector for attachment to a coaxial extension cable or other radio frequency hardware. Visually it is similar to the common household 75 Ohm Type F connector that screws into cable boxes, the design varies by 2mm and the two cables cannot b connected without an adapter ![]() SubMiniature Version A (SMA) is an RF coaxial connector designed for semi-precision applications. The SMA connector is one of several RF connector designs to connect coaxial cables and antennas while preserving the signal. RF coax cables cannot be stripped and soldered together without signal loss. Both connectors are insulated with polytetratluoroethylene (PTFE) dialectric.Īn antenna with an SMA connector couples to an SMA cable: RF coaxial antenna cable shielded to prevent signal degradation. The female connector has a central receptacle for the pin, also coated with nickel or gold, the threads external to the outer casing. The barrel screws on to an SMA female antenna or coax with threading spaced at 36 threads per inch. The male connector features a central pin coated with nickel or gold. They are also cost-effective when designed in gold-plated brass, nickel-plated brass, or stainless steel. SMA connectors have a relatively durable screw coupling (good for 500 couplings at recommended torque) and are resistance to vibration. SMA antenna and coax connectors feature 50 Ohm impedance, drawing DC from 0GHz up to 18GHz. A 433MHz antenna is also likely to be an SMA antenna. It has a silicon rubber O-ring, which separates the main body and coupling nut for dust resistance.SMA was the connector of choice for most applications until RP-SMA began to replace SMA in the late 1990s, as the more popular option, Therefore there are far more RP-SMA antenna options than SMA antenna options: We have many SMA to RP_SMA antenna cable and adapter options that enable you to connect an RP-SMA antenna to an SMA cable or connector.ĭata Alliance offers SMA antennas for WiFi, LTE, GSM, CDMA, Bluetooth, base stations, radio astronomy, hand-held radios or telephones, machine-to-machine communications.The female connector has a 4.32-mm-long thread for coupling.The male connector is equipped with a 5/16-inch hex nut to allow torque by a 1/2-inch wrench.It uses a 1/4-inch-36-thread-type coupling mechanism.Some mechanical features of the SMA connector include: This was apparently done on purpose by the FCC to prevent home users from damaging sensitive RF equipment when screwing on the antenna. ![]() ![]() The latter is often placed on and attached to a stable device, whereas the former is located on the detachable wire attachment.Ī newer reverse-polarity SMA specification (RP-SMA or RSMA) reverses the polarity of the genders so that the female connector now has the center pin and the male connector has the center receptacle, but the threads and other features remain the same. The male connector is the one with the center pin and inside threads of size 1/4-inch-36, whereas the female connector is the sleeve counterpart that features an outside thread and is used to hold the connection in place. The main features of this connector are its high mechanical strength and high durability, as evidenced by its robust-looking metal construction. The SMA connector is considered a semi-precision, sub-miniature and high-frequency connector that is rated to deliver reliable broadband performance from DC to 18 GHz, with a constant impedance of 50 ohms and low reflection. Techopedia Explains SubMiniature Version A Connector (SMA Connector)
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