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Special Guidelines for Wireless thomas sabo bracelets online Antennas are an important and often overlooked link in the wireless thomas sabo chains uk store network. The purpose of this white paper is to provide some suggestions on cheap thomas sabo charm carriers uk ways to provide a proper groundplane to ensure optimum wireless antenna special performance. We will use Mobile Mark antennas as examples.

Mobile Mark antennas cheap thomas sabo earrings sale uk fall into three thomas sabo earrings uk online categories: site antennas, device antennas, and vehicle or equipment cabinet antennas. thomas sabo charms sale

Site Thomas Sabo Australia cheap Antennas (OD, ECO, PN, PS, SCR discount thomas sabo bracelets Series)

Site antennas, either Omni-directional or Directional are designed to operate thomas sabo watches uk without an external groundplane. The addition thomas sabo necklaces store of extra metal, either the mounting mast, Cheap Thomas Sabo sale tower or other mounting thomas sabo charm carriers hardware, will not usually enhance their performance.

This is a great advantage for installers because they do not have to consider the Thomas Sabo Australia online environment or composition cheap thomas sabo bracelets or choose a wireless thomas sabo earrings store antenna special installation location.

Device Antennas (PSTG, PSTN, PSKN Series)

Device antennas are typically designed as quarterwave or halfwave. As a rule of thumb, thomas sabo charm carriers uk online quarterwave antennas require a groundplane but halfwave antennas are groundplane independent and do not need a groundplane to operate.

Mobile Mark's PSTG Series device antennas are quarter-wave designs and therefore cheap thomas sabo watches sale wireless antenna special installation requirements include the need for some discount thomas sabo charm carriers form of groundplane to operate. This is usually provided by the device which cheap thomas sabo carriers the antenna is mounted to if the device is thomas sabo charms cheap made of thomas sabo earrings uk store metal. However, if the device is made of cheap thomas sabo earrings fiberglass, then wireless antenna special installation requirements do apply and a supplemental metal groundplane would be required. However, Thomas Sabo Australia the PSTG Series antennas are broadband and therefore tolerant of different size devices. Many times antennas of these types can be custom tuned to specific radio designs.

The PSKN Series cheap thomas sabo charms sale uk antennas, such as the PSKN3-900/1900T, are true halfwave designs and therefore do thomas sabo bracelets uk online not require any additional groundplane. They are ideal for typical Modem applications and can be used for a thomas sabo carrier wider range of wireless antenna special settings.

Vehicle or Mounting Box thomas sabo necklaces Antennas (RM, LMW, SMW, DM, MRM, SMD, SM Series)

The RM, thomas sabo earrings online LMW and SMW thomas sabo charms store Series surface mount antennas thomas sabo charms uk online are based on wideband quarterwave thomas sabo pendants sale elements. At the lower frequencies, cheap thomas sabo earrings uk i.e. 694 to 1200 MHz, additional groundplane is required for the antenna to meet its wireless antenna thomas sabo watches sale special thomas sabo charm carriers store installation specifications.

Since the antennas are one quarterwave based designs, the ground plane we discount thomas sabo charms recommend is 12 inch by 12 inch; this is what we use to verify our antennas performance. When mounted on thomas sabo charm earrings the metal surfaces of a vehicle the ground plane requirements are easily thomas sabo charms met. However in some cases vehicle will have a non-metallic surface, such as fiberglass, thomas sabo earrings cheap where the antenna is to be mounted. thomas sabo charm carriers uk In these wireless antenna special cases we recommend the use of aluminum flashing cheap thomas sabo watches tape on the underside thomas sabo earrings uk of the fiberglass thomas sabo chain surface. Two pieces of thomas sabo carriers cheap 2 or 3 inch wide tape, 12 inches long, can be installed in an X shape with the thomas sabo chains mounting stud of the antenna in the center of the X. The mounting stud/nut must contact the cheap thomas sabo chains sale uk tape.

In telemetry applications it is common for the antenna to be mounted to a metal Thomas Sabo Australia sale online equipment cabinet. The metal surfaces of the cabinet will generally thomas sabo chains store fulfill the grounding requirements. However, in some wireless antenna special telemetry applications the use of non-metallic cheap thomas sabo necklaces enclosures is becoming more common. In these applications a groundplane does cheap thomas sabo necklaces sale uk need to be thomas sabo chains cheap considered. Since cheap thomas sabo rings the enclosures are typically fiberglass or plastic they will not provide the necessary grounding for the antenna. In these cases an application of aluminum tape to the inside Cheap Thomas Sabo Australia online of the thomas sabo bracelets store cabinet or possibly a custom cheap thomas sabo charm carriers metal plate can be cheap thomas sabo rings uk fabricated to allow the antenna to function properly. Many non-metallic enclosures have a conductive EMI coating applied to the inside surfaces to reduce transmitted emissions, this coating will usually work as an adequate groundplane.

Pole Mount Option: When using these antennas with a pole mount, the mounting brackets and hardware provide an adequate ground for wireless antenna thomas sabo charms online special or standard settings, even at the lower frequency thomas sabo carriers sale ranges.

For 1.7-6.0 MHz applications the metal included in the antenna assembly usually provides an adequate ground plane. Of course, as with any antenna the larger the ground plane the better. Without the proper groundplane the elevation pattern usually looks like a typical dipole with the peak cheap thomas sabo bracelets sale uk beam being on or near the horizon and the gain being slightly lower. With a proper groundplane the peak beam of a quarterwave antenna lift up about 30 to 40 degrees from the horizon and the gain will increase. This can be seen in thomas sabo charm necklaces the elevation plots at thomas sabo pendants online the end of the paper.

For the thomas sabo necklace most thomas sabo bracelets uk part, DM, MRM and SMD Surface Mount Series thomas sabo rings store antennas have enough metal to provide adequate grounding as part of their assembly because they are designed to operate cheap thomas sabo necklaces sale on frequencies above 2.0 GHz. As with all of our mobile antennas, we test and characterize these higher frequency antennas mounted to our standard 12 inch cheap thomas sabo charm carriers sale uk by 12 thomas sabo earrings inch ground plane but thomas sabo earring they will meet their specifications without it.

SM (Low Profile Surface Mount) Series:

The SM Series Antennas in the 800 and 900 MHz ranges require a good ground plane. Since this antenna is a low profile equivalent quarterwave design, the ground discount thomas sabo rings plane we thomas sabo pendants cheap recommend is 12 inch by 12 inch; this is what we use thomas sabo rings uk store to verify our antennas performance. When mounted on the metal surfaces of a vehicle the ground plane requirements thomas sabo necklaces uk online are easily met. However 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 the use thomas sabo necklaces online of aluminum flashing tape on the underside of the fiberglass surface. Two pieces of 2 discount thomas sabo necklaces or 3 inch wide tape, 12 inches long, can be cheap thomas sabo pendants uk installed in an X shape with the mounting stud thomas sabo rings online of the antenna in the center of the X. The mounting stud/nut must contact the tape.

Pole Mount Option: There is no pole mount available for thomas sabo necklaces uk store the SM antennas in this frequency range.

The SM Series Antennas used from cheap thomas sabo bracelets sale 1700 MHz thomas sabo carriers online and above have enough internal metal to act as their own ground plane. Of course, as with any antenna, regardless discount thomas sabo chains of whether it is a wireless antenna special application, thomas sabo bracelet the thomas sabo bracelets sale larger the groundplane the better.

In telemetry applications it is thomas sabo necklaces sale common for the antenna to be mounted to a metal equipment cabinet. The cheap thomas sabo charms metal surfaces thomas sabo charm carriers online of the cabinet with fulfill the grounding requirements. In many thomas sabo watches uk online telemetry applications the use discount thomas sabo watches of non-metallic enclosures are becoming more common. Since they are typically fiberglass or plastic they will not provide the necessary thomas sabo earrings sale grounding for the antenna. In these cases an application of aluminum tape to the inside Cheap Thomas Sabo Australia of the cabinet or possibly a custom metal plate can be fabricated to allow the antenna to function properly.

Shown above are two plots of the same quarterwave antenna, cheap thomas sabo watches uk the first one is cheap thomas sabo chains sale without a groundplane thomas sabo charms uk and the second cheap thomas sabo charms uk one with a 12 cheap thomas sabo chains inch by 12 inch groundplane. You can clearly see how without a ground plane the pattern is undefined and with the groundplane the typical quartwave pattern is present.

About Mobile Mark, Inc.:
Mobile Mark, thomas sabo charm carriers uk store Inc. designs and manufactures site, mobile and device antenna for 600 MHz - 9 GHz. Applications include GPS Tracking & thomas sabo watches online Fleet thomas sabo charms uk store Management, Cellular GSM/CDMA, LTE, WiMAX, WiFi, RFID, Public Safety, cheap thomas sabo chains uk Military and Machine-to-Machine (M2M). Thomas Sabo Australia sale Engineering and custom design services available. Mobile 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. For more information about how to handle wireless antenna special applications, visit our website at www.mobilemark.com.