A design of miniaturization LPDA antenna with ultra wideband

This paper designed a Log-periodic miniaturization antenna working in 8GHz to 18GHz. It satisfies the characteristic of high gain, good radiation pattern, and a large proportion of the size reduction which other antenna don´t possess. The lengthwise is 80mm, it reduces more than 50% of the transverse dimension with the original specification. A “mountain” terminal loaded design is used to shrink size of antenna under the premise of guaranteeing directivity of antenna. By optimizing backward feeding structure and antenna array to improve antenna performance. The final result is superior to other same type antenna distinctly.