Base Station Antenna Pattern Test System Development

Since antenna appearance, directivity measurement always is important problem for people. Now with development of modern analysis and design technology, directivity measurement becomes more and more indispensable. To know antenna performance and character well in depth, take exact measurement for antenna. Directivity measurement purpose is radiation character verification. Wave beam, gain, sub wave beam for antenna are decided by directivity chart. The measurement needs system to realize.Most important purpose for the article is to check the radiation performance for dipole unit. The system also can check the impedance matches of radiation units. The paper has data comparing and performance verification for the purpose. It is very important for antenna engineering. The test system can check production process, also can be used for failed product repair. For test method, near-field test is first optional. But considering test site, test cost, we use fountain field measurement.The main contents of this paper are follows:1. Based on electromagnetism theory, research electric dipole unit radiation theory.2. Based on dipole unit radiation theory, analyze symmetry dipole unit directivity, introduce directivity theory for base station antenna and calculate method.3. Introduce directivity measurement technology, especially for fountain field measurement theory.4. Designed and coded a antenna planar measurement system based on VEE software. The system can complete antenna auto- measurement for vertical polarization, including software design, hardware design, test procedure and verification. The system integrates the functions of system controlling, data processing and test report generating. Now this system is applied for the practical use.