Wireless Antennas | Multi-Tech Systems MultiModem instruction

Chapter 5 – Wireless Antennas

The Antenna

The antenna sub-system and integration in the application is a major issue: Choice of antenna (type, length, performances, thermal resistance, etc.) These elements could affect wireless performances such as sensitivity and emitted power.

GSM and CDMA Antenna

The integrated modem antenna connector is a SMA connector. The SMA connector incorporates a 'Screw-on' action in order to make the connection easier while providing an excellent RF performance. An additional advantage is its small physical size, which is 50% of the standard MCX connector.

This type of connector is suitable for the standard ranges of flexible and semi-rigid cables. The characteristic impedance of the MMCX coaxial connector is 50 ohm. The antenna manufacturer must guarantee that the antenna will be working according to the radio characteristics presented in the table below.

GSM Radio Characteristics

	GSM 850	E	-GSM 900	GSM 1800	GSM 1900
Frequency RX	869 to 894 MHz	925 to 960 MHz		1805 to 1880 MHz	1930 to 1990 MHz
Frequency TX	824 to 849 MHz	880 to 915 MHz		1710 to 1785 MHz	1850 to 1910 MHz
RF Power Stand	2W at 12.5% duty cycle	2W at 12.5% duty cycle		1W at 12.5% duty cycle	1W at 12.5% duty cycle
Impedance			50 ohms
VSWR		<2
Typical Radiated Gain			0 dBi on azimuth plane

CDMA Radio Characteristics

	CDMA 800		CDMA 1900
Frequency RX	869 to 894 MHz		1930 to 1990 MHz
Frequency TX	824 to 849 MHz		1850 to 1910 MHz
Impedance		50	ohms
VSWR		<2
Typical Radiated Gain	0 dBi in at least one direction

An antenna that meets the requirements for use with the SocketWireless product is included with your purchase.

Multi-Tech Systems, Inc. MultiModem Wireless EDGE, GPRS, & CDMA Modem with Bluetooth (S000390B)

MultiModem specifications

The Multi-Tech Systems MultiModem is a versatile solution recognized for its reliability and efficiency in data communication. Ideal for a variety of applications, the MultiModem encompasses several models, each tailored to accommodate different communication needs, including M2M (Machine-to-Machine) solutions and IoT (Internet of Things) applications.

One of the standout features of the MultiModem is its support for multiple connectivity options. It is equipped with various technologies, including GSM, CDMA, and LTE, allowing users to choose the optimal network for their specific requirements. This multi-network compatibility ensures a greater range of connectivity in diverse geographic areas, making it suitable for both urban and remote settings.

The MultiModem also features robust data transmission capabilities, offering different interfaces such as USB, RS232, and Ethernet. These options facilitate seamless integration with existing systems, whether they are legacy devices or modern applications. This flexibility makes the MultiModem an excellent choice for industries like transportation, healthcare, and industrial automation.

Another defining characteristic of the MultiModem is its advanced security features. Security in data transmission is paramount, especially in today’s digital landscape. The MultiModem comes equipped with encryption options and secure access protocols, ensuring that sensitive information is protected against unauthorized access and breaches.

Moreover, the device is designed for durability and reliability, capable of operating in harsh conditions. This ruggedness is crucial for deployments in remote locations, where environmental factors could pose challenges. The MultiModem is built to withstand extreme temperatures and electromagnetic interference, which are common in industrial settings.

In addition to its hardware capabilities, the MultiModem is also supported by robust software solutions that enable easy configuration and management. The accompanying software tools provide user-friendly interfaces, allowing businesses to monitor, manage, and optimize their communication networks effectively. Remote management capabilities further enhance operational efficiencies, enabling users to update settings and troubleshoot issues without being physically present.

Overall, the Multi-Tech Systems MultiModem stands out as a powerful and flexible tool for robust and secure data communication. Its broad range of applications, combined with advanced features, makes it a trusted choice for businesses looking to implement reliable connectivity in their operations. Whether enhancing M2M communications or integrating IoT devices, the MultiModem provides a reliable backbone for modern data transmission needs.