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Using Wireless For Machine-to-machine (M2M) Communications Is Expanding Swiftly. M2M Wireless Options
The use of wireless for machine-to-machine (M2M) communications is expanding quickly. M2M Wireless answers are being set up inside a increasing array of cellular and unit settings: ATM Devices, Clever Grid and Utility Meters, Business and Mass-transit Automobiles, Vending Devices, and Agricultural and Mining Sensors.
M2M Antennas are a significant and typically ignored website link during this form of wireless network. The purpose of this white paper is to provide some pointers and solutions on tips on how to make sure a appropriate groundplane to ensure optimum functionality. Cellular Mark M2M antennas might be utilized since the examples.
Unit antennas are usually intended as quarterwave or halfwave. Being a rule of thumb, quarterwave antennas call for a groundplane but halfwave antennas are groundplane independent and do not will need a groundplane to function. Nonetheless, most M2M antennas present improved performance that has a greater groundplane.
Cellular Mark gives you many antenna designs which can be employed as M2M antennas. These antennas are actually configured for various frequency ranges, the most prevalent staying Cellular at 850 & 1900 MHz, WiFi at 2.4 GHz.
RM, LMW and SMW Surface Mount Series: The RM and SMW Series M2M antennas are based on wideband one quarter-wave elements. For the lower frequencies, 694 to 1200 MHz, additional ground planes are required for the antenna to meet its specifications.
Since the antennas are one quarter-wave based designs, the ground plane we recommend is 12 inch by 12 inch; this is what we use to verify our M2M antennas efficiency. When mounted on the metal surfaces of a vehicle the ground plane requirements are easily met. Nevertheless in some cases vehicle will have a non-metallic surface, such as fiberglass, where the antenna is to be mounted. In these cases we recommend using aluminum flashing tape on the underside of the fiberglass surface. The tape might be installed in an X shape with the mounting stud of the antenna in the center of the X. The mounting stud/nut must contact the tape.
In telemetry applications it is typical for the M2M antenna to be mounted to a metal equipment cabinet. The metal surfaces of the cabinet with fulfill the grounding requirements. In many telemetry applications the usage of non-metallic enclosures are becoming more prevalent. Since they are generally fiberglass or plastic they will not present the necessary grounding for the antenna. In these cases an application of aluminum tape to the inside of the cabinet or possibly a custom metal plate could be fabricated to allow the antenna to function properly. When using these M2M antennas which has a pole mount the mounting brackets and hardware provide an adequate ground.
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For 1700 to 6000 MHz applications the metal included in the antenna assembly usually provide an adequate ground plane. Of course, as with any antenna, the more substantial the groundplane the better.
DM, MRM and SMD Surface Mount Series: For one of the most part these M2M antennas have enough metal to supply adequate grounding as part of their assembly because they are created to operate on frequencies above 2.0 GHz. As with all of our mobile antennas, we test and characterize these higher frequency M2M Antennas mounted to our standard 12 inch by 12 inch ground plane but they will meet their specifications without it.
SM (Low Profile Surface Mount) Series: The SM Series M2M Antennas in the 800 and 900 MHz ranges necessitate a good ground plane. The ground plane we recommend is 12 inch by 12 inch; this is what we use to verify our antennas overall performance. When mounted on the metal surfaces of a vehicle the ground plane requirements are easily met. Nevertheless in many cases vehicle will have a non-metallic surface, like fiberglass, where the antenna should be to be mounted. In these cases we recommend the usage of aluminum flashing tape on the underside of the fiberglass surface. The tape might be put in in an X shape with the mounting stud of the antenna in the center of the X. The mounting stud/nut must contact the tape. There is no pole mount available for the SM antennas with this frequency assortment.
The SM Series M2M antennas utilized from 1700 MHz and above have enough internal metal to act as their own ground plane. Of course, as with any antenna, the greater the groundplane the better.
In telemetry applications it is common for the antenna to be mounted to a metal equipment cabinet. The metal surfaces of the cabinet with fulfill the grounding requirements. In many telemetry applications the usage of non-metallic enclosures are becoming more popular. Since they are commonly fiberglass or plastic they will not present the necessary grounding for the antenna. In these cases an application of aluminum tape to the inside of the cabinet or possibly a custom metal plate is often fabricated to allow the antenna to function properly.
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About Cellular Mark, Inc.:
Cellular Mark, Inc. designs and manufactures site, cellular and system antenna for 600 MHz – 9 GHz. Applications include GPS Tracking & Fleet Management, Mobile GSM/CDMA, LTE, WiMAX, WiFi, RFID, Public Safety, Military and Machine-to-Machine (M2M). Engineering and custom design services available. Cellular Mark's global headquarters, which include research facilities and manufacturing plant, are located near Chicago, IL. An additional manufacturing and sales facility is located near Birmingham, UK. RFID Antenna Designs by Cellular Mark are applied by manufacturers and installer throughout the US and Europe. Complete information on the variety of M2M Antennas is often found on the Cellular Mark website.
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