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为减小传统电视发射天线的体积,提出将微带结构天线应用于电视发射系统的方法,设计一种基于E型贴片叠层的微带天线.通过采用叠层结构、E型贴片、馈电探针加装金属垫圈、空气填充和7/16射频同轴连接器,实现了微带结构的电视发射天线.为验证方法的有效性,加工了一款微带结构的UHF频段电视发射天线.测试结果表明:天线驻波比小于1.15(|S11|≤-23 d B)的相对阻抗带宽达到18.2%(频率范围544 MHz~653 MHz);中心频率处天线增益为9.23 d Bi;在1000W发射功率下,天线能够可靠工作.设计的微带结构电视发射天线尺寸显著减小,简化了天线结构和调试过程,从而节约了天线的制作成本.
In order to reduce the volume of the traditional TV transmitting antenna, a method of applying the microstrip antenna to a TV transmitting system is proposed, and a microstrip antenna based on the E-type patch is designed. By adopting a laminated structure, an E-type patch, Feeding probe with metal washer, air-filled and 7/16 RF coaxial connector, to achieve a microstrip structure of the television transmitting antenna.To verify the effectiveness of the method, the processing of a microstrip UHF band television transmission Antenna.The test results show that the relative impedance bandwidth of the antenna with VSWR less than 1.15 (| S11 | ≤-23 d B) reaches 18.2% (frequency range 544 MHz ~ 653 MHz), antenna gain at the center frequency is 9.23 d Bi, 1000W transmit power, the antenna can work reliably.The design of microstrip structured TV transmitting antenna significantly reduces the size, simplifies the antenna structure and debugging process, thus saving the antenna manufacturing costs.