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With the rapid development of electronic technology and its products, spatial electromagnetic environmental conditions more and more complex, resulting in airborne electronic equipment interference problems highlighted. Airborne Radio Compass due to its operating frequency is relatively low in the long wavelength, has become the hardest hit by the interference, electromagnetic interference factors has now become a bottleneck restricting the use of radio compass effect, a serious impact on the development of the radio compass. Therefore, improving the airborne radio compass resistance to electromagnetic interference, radio compass actual use of performance has become an important research topic of the development of radio compass. The topic is the combination of their work over the years the actual airborne radio compass electromagnetic interference suppression conducted in-depth, systematic study. Research process, a comprehensive analysis of the basic principles of airborne radio compass and subject to electromagnetic interference factors, including the Polish Radio signal interference, short-wave radio signal interference, FM radio signal interference and power supply and control signal interference. Calculated in the suppression of the Polish Radio signal interference, medium-wave radio station signal interference field, the Polish Radio signal interference mechanism, designed to inhibit the Polish Radio signal interference, namely: to improve the dynamic range of the system requirements and improve receiver selectivity. These methods have application. In inhibition of short-wave radio signal interference, the focus calculation and testing of a short-wave radio interference field strength and airborne radio compass, analysis of short-wave radio interference mechanism, and then design measures to inhibit the short-wave radio signal interference, including: filtering method, atresia Law and Consumer Law. In the suppression of the FM radio signal interference, has been calculated, testing and mechanism analysis to identify the FM radio of the interference of airborne radio compass, designed to inhibit the FM radio signal interference measures include: increasing mutual isolation between the antenna combinations, elimination of front-end circuit distortion factor. The suppression of the power supply and control signal interference, the calculated and measured interference signal amplitude analysis of the interference mechanism, formulate measures to suppress the power supply and control signal interference, including: filtering, well grounded, hardware protection laws and Software Protection Act. The issues involved, electromagnetic interference factors, many kinds of aircraft, very difficult to solve. Research to take counting, measuring, analysis, experiments and validated methods to obtain more results, many of the results has begun to be widely used in a variety of aircraft, get a good economic and military benefits.
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