Everyone expects that wireless functionality is easy to use and reliable for all types of widgets. There are a number of international standards such as Bluetooth, Wi-Fi and ZigBee, based on the specific capabilities that are complementary to wireless - for instance in competition and others. Whether it's wireless headphones with Bluetooth or Zigbee wireless meter reading, with the design criteria are generally very similar. Many companies have bought the line that wireless modern marketingSolutions are easy to implement and low risk - leaving the chaos if the product development teams are out of their depth and unable to deliver as promised.
The products have been developed, was the place where the antenna of the RFI shield, or antenna requires no thought has been given the opportunity for full and costly redesigns. Wireless is not easy and requires special attention to a number of details to be successful. The main considerations apply toan overview of the process.
In the first place - all wireless stations in Europe are sold, must be "type approved", if licensed or unlicensed. License use certain radio frequencies, which would be a society for the use of transfer / resell an example to buy GSM phones, for which the operator of the right to spectrum and unlicensed bands (also known as industrial, scientific and medical ISM bands) are allocated on the basis of the well-known that because of their low efficiency and lackPotential interference with any formal allocation is given, an example of an unlicensed radio and Bluetooth. Approval means a formal proof against the norm by a "notified body", along with the standard EC test for product safety and EMC. Consortia such as Bluetooth can also request the testing standard than before, rather than a company, their logo on a product.
Adding a radio impact on the entire range of products - this is needed from the outset, it must be understood the positioning of the antennaessential to the achievement, need industrial design team to understand what is needed to find a workable solution. The normal limits of EMC are well above the noise that a radio receiver will stop working properly, you must ensure that the electronics including the power supply must be designed with the radio. An often overlooked effect the addition of wireless capabilities is the effect on the lives of radio battery are hungry for power and able to explainMost of the more power consumed.
RF PCB Design is a specialist expertise in which the sizes and gaps are bound by strict rules for obtaining a controlled impedance. Where are the impedance of the board is wrong, you can design a series of effects in reducing the impact on performance on the design do not participate in working life. The component and the earth and the air power need to take into account the effects of high frequency in order to achieve optimal performance. The layout isfundamental importance for the RF design - so that specific CAD tools are allowing designers to simulate the effects of RF layout.
Finally, the radio must be tested, both during development and production, the equipment can be expensive and the test must undertake to consider carefully, before adding wireless capabilities to be a product.
The days when RF was seen as a form of "Black Magic," is no longer relevant, if single-chip RF solutions areavailable. Make sure you have adequate tools (test equipment and RF CAD tools), you can ensure that the risks of developing HF involving reduced. And, as always, makes the technique - practice makes perfect, but if there are no time limits or risk too high to consider, then with an RF-pro.
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