A New Spiral Antenna with Improved Axial Ratio and Shorted Arm Length

作者：Huang Huifen^*; Lv Zonglin

来源：Progress in Electromagnetics Research Symposium (PIERS), Guangzhou, China, 2014-08-25 to 2014-08-28.

• Archimedean spiral antennas
• Arm lengths
• Axial ratio
• Frequency characteristic
• High frequency characteristics

A new spiral antenna is proposed in this paper. The developed antenna has improved axial ratio (AR) and shorted arm length. The formula of the new spiral is given. The developed spiral antenna combines the low frequency characteristic of power spiral antenna and high frequency characteristic of Archimedean spiral antenna. The growth rate of radial distance at large winding angle is close to power spiral for improved AR in low frequencies, and the growth rate at small winding angle is close to Archimedean spiral for good AR in high frequencies. The results reveal that the developed spiral antenna has noticeable improved axial ratio at low frequencies compared with Archimedean spiral antenna, and the problem of axial ratio degradation of power spiral antenna is also solved. The arm length is shorted by 46.4% compared to conventional Archimedean spiral antenna, and 63.5% compared to power spiral antenna.

• 出版日期2014
• 单位华南理工大学