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Manufacturers : RF and microwave electronics : Wireless modems
Portable wireless data terminals allow the transmission to remote locations of local data as well as the reception and display of remote data by using wireless modems. Wireless modems enable mobile computer devices to communicate with other computer devices without requiring physical access to a land line communication port. Many portable computing devices incorporate a wireless modem for data communication. A wireless modem is similar to a wired modem in that it permits a computer or other device to send and receive data from external sources. A wireless modem uses wireless communication channels to replace a more traditional wired connection through a telephone or a cable line. Wireless modems generally modulate an RF carrier with a stream of data packets, then amplify the modulated carrier for transmission from an internal antenna. When data transmission proceeds in a wireless network, the wireless modem is widely used to transmit the data. The wireless modem processes data and signals for transferring data between the wireless interface and the user interface. The modem controls the operation of the user interface for receiving data from and providing data to a user. The wireless modem also controls the operation of the wireless interface for sending and receiving signals to and from a wireless terminal or base station. A wireless radio frequency modems typically include an RF front end or an RF head, a modulator/demodulator portion, a central processing unit (CPU) or processor, memory; and an interface. A wireless modem may be installed as an adapter card or in an adapter slot such as a PCMCIA slot. The radio portion consists of a transmitter and a receiver. The transmitter and receiver may share a common antenna via a duplexer.


Listings on RF and microwave electronics : Wireless modems

  • Dataradio Inc.
    Provides 700 MHz base station controller, digital wireless base station, private wireless data network IP connectivity, RF mobile radio modem, wide area network controller of mobile data system, network management system, wireless modems, analog radios, wireless modems, narrowband IP/Ethernet solution, synthesized transceivers, RF data module, and wireless data solutions. Canada.
    http://www.dataradio.com
  • Electronic Systems Technology, Inc.
    Offers wireless modems for applications in the VHF and UHF radio spectrums, used in a variety of applications and distances that range from intra building communications up to 30 miles line-of-sight. Applications range from industrial controls (SCADA), remote site monitoring, warehousing, phone by-pass applications, command and control, to inventory control and PC networking with major applications. USA.
    http://www.esteem.com
  • Kantronics, Inc.
    Manufacturer of wireless (RF) computer modems (terminal node controllers), digital data control (embedded microcomputer systems), protocol applications requiring complex firmware, and location (via GPS) and status reporting products. USA.
    http://www.kantronics.com
  • Land-Cellular Corporation
    Privately-held company that designs, manufactures and distributes wireless data communications devices that enable the flow of data over cellular networks. The company's existing products are based on Kyocera's M200 CDMA module and use standard RS232 and RJ45 Ethernet connections to integrate with machines and transmit data between the machine and IT system using CDMA cellular networks. USA.
    http://www.land-cellular.com
  • MaxStream, Inc.
    Developer of wireless modem networking for electronic devices. Provides wireless modem modules, stand-alone radio modems, RF design services, and supporting software. Products include 900 MHz and 2.4 GHz embedded OEM RF modules, RS-232/485 RF modems and USB RF modems, military reconnaissance robots, remote weather stations, home utility meters, omni-directional monopole and dipole antennas, local cables for integrating a wireless connection, and DIN rail mounting kit bracket. USA.
    http://www.maxstream.net
  • Microhard Systems Inc.
    Specializes in the design and manufacture of long range robust wireless data equipment including ethernet transparent FHSS bridge, wireless ethernet serial gateway, 900MHz industrial serial FHSS modem, industrial grade frequency hopping modem, cascadable wireless analog and digital input/outputs, professional OEM wireless modules, antennas and cable systems. Canada.
    http://www.microhardcorp.com
  • RF DataTech
    European manufacturer of radio modem, wireless telemetry, satellite data modem and paging radio products. In addition to complete boxed modems, the company also supplies transmitter, receiver and transceiver modules for use by OEM companies in their own products. UK.
    http://www.rfdatatech.co.uk

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