First things first; understanding the modern technology lingo - Global System for Mobile communications (also known as GSM), General Packet Radio Service (also known as GPRS

The propagation rules on these frequencies mean that the wireless equipment radiates in a straight line, operating in a line of sight basis. Although radio signals do bounce off and travel through certain materials, using the line of sight practice should be the first rule to observe. Obvious to some, there needs to be particular emphasis on the fact that the antenna receives or transmits the signal, not the wireless module.

The diagnostics interface featuring interchangeable modules for working on all types of vehicles, can also be used to run remote tests with the vehicle moving, using the GPRS antenna.

GSM/GPRS communications operates on a line of site principle so it is a useful idea to raise the height of the antenna above ground level if possible. This gives the additional plus of keeping the antenna out of arms length whilst improving communication at the same time.

Many ceramic antennas are available tuned to different technologies such as GSM/GPRS, 3G and WiFi. They are amongst the most compact solutions available and require a dedicated space on a PCB with ground plane clearance.

One simple way of overcoming obstructions in a line of sight communications environment is to elevate the radiating antenna. Many of today's GSM/GPRS antennas are supplied with different lengths of cable and office or base station antennas are providing with cable lengths of up to 15 metres. This will give the installer a greater scope for installing the antenna as high above the ground as possible and preferably outside of a building towards the area with best cell site coverage.

Although most GSM/GPRS antennas are vertically polarised, a growing trend of low profile antennas are being introduced to the market. These are designed to be fitted low down on the casing and secured via a through hole bolt which passes through a hole on the enclosure. This ensures the antenna cannot be removed without access to the inside of the enclosure and no cabling is visible. Good quality products such as the Siretta Antenna Tango 1 and Tango 2 series are designed with robust plastic enclosures to give adequate protection against all but the most sustained attack. These offer quad band GSM/GPRS cellular connectivity and often 3G and 2.4GHz operation as well. Siretta Antennas also produce a Tango 5 series which provides GPS (satellite tracking) capability as well.

Although we are concentrating on the improvement of GSM/GPRS signal transmission and reception in embedded design applications, nike tenis personalizados, similar transmission / reception rules cover the majority of today's wireless M2M modules. These include 3G and ISM bands such as 433, 868 and 2400MHz. The latter frequency also covers Bluetooth, nike air jordan australia, WiFi and ZigBee / IEEE802.15.4 standards.

Another consideration is the overall size of enclosure to ensure the antenna fits. For instance, there are small antennas and antennas built to a specific wavelength i.e. ¼ wave. GPRS module transmits and receives GPRS data and information through a GPRS antenna.