圆极化天线在调频广播中的应用

Application of Circularly Polarized Antenna in FM Broadcasting

调频广播是当今音频广播的主要收听方式。广播电台选择合适的发射天线尤为关键。随着技术的不断发展,天线增益和覆盖效果不断得到提高。但随着城市城镇化的不断扩大,建筑物密度和高度的提高,对广播电视发射台站的覆盖以及抗干扰提出了更高的要求。对此,通过采用圆极化天线替换原有垂直极化天线,在不改变发射机现有条件下,提高天线覆盖场强,增强了抗干扰能力,保证广播电视发射台站的播出效果。

FM broadcasting is the main listening mode of today’s audio broadcasting.It is very important for a radio station to choose a suitable transmitting antenna.With the continuous development of technology,antenna gain and coverage effect are continuously improved.However,with the continuous expansion of urbanization and the improvement of building density and height,higher requirements are put forward for the coverage and anti-interference of radio and television transmitting stations.In this paper,the circular polarization antenna is used to replace the original vertical polarization antenna.Without changing the existing conditions of the transmitter,the antenna coverage field strength is improved,the anti-interference ability is enhanced,and the broadcast effect of the radio and television transmitting station is guaranteed.