ISM (Industrial, Scientific, and Medical) antennas operate in the ISM frequency bands, which span a wide range of radio frequencies (RF) that are a relatively narrow band. The antennas that fall under the ISM frequency bands can have very broad applications. Some antennas are designed for low-power, short-range transmissions, and in the same frequency bands there are long range directional antennas, such as Yagi antennas. ISM antennas can operate at much higher frequencies but require government licenses to do so. There is also a mix of licensed and unlicensed applications within many ISM frequency bands, and the bands permitted unlicensed access can also vary by region.

Because ISM antennas do not require government licenses if used at 2.4 GHz or lower, there has been an explosion of usage in recent decades for short range communication systems for wireless devices. This is sometimes called non-ISM use because the devices do not fall under industrial, scientific, or medical equipment. Wireless devices are now by far the largest usage of the ISM band. These devices include Wi-Fi networks, cordless phones wireless microphones, Bluetooth devices, garage door openers, baby monitors, wireless doorbells, keyless car entry systems, wild animal tracking, and near-field communication (NFC) devices such as contactless smart cards and proximity cards. When designing an IoT (Internet of Things) device or other wireless system, it is important to consider the differences between the sub-GHz band versus the 2.4 GHz band and how they can impact optimal system performance and commercial viability. The sub-GHz band typically allows a longer-range wireless communication link than the 2.4 GHz band and is more capable of penetrating objects like walls and buildings. Sub-GHz frequency waves are less susceptible to reflection, can bend further around obstacles, and often encounter less interference from the large amount of other wireless devices operating in the license-free bands. Sub-GHz networking is the preferred wireless technology in large building environments and is more frequently used in low bandwidth or low data rate applications; whereas, the 2.4 GHz band is used where a higher data rate is needed. Sub-GHz applications include fire alarms, hand-held payment devices, barcode scanners, smart meters, electronic point-of-sale, inventory tracking, remote process monitoring, and restaurant ordering systems.

Asialeren has a wide range of ISM antenna solutions, predominantly operable in the 433.92 MHz, 868 MHz, 915 MHz and 2.4 GHz center frequency bands. This includes embedded or internal antennas for short range communications; remote, dipole and terminal mount external antennas for mid-range communications; as well as outdoor rated external antennas for long-range communications.