Title :
Multiband spiral antenna with high gain by conical wall
Author :
Jae-Hwan Jeong ; Kyeong-Sik Min ; In-hwan Kim ; Sung-min Kim
Author_Institution :
Dept. of Radio Commun. Eng., Korea Maritime Univ., Busan, South Korea
Abstract :
This paper presents design for high gain spiral antenna with conical wall. To improve the gain of spiral antenna, the angle and length of conical wall is newly designed for the conventional antenna with circular cavity wall. The good axial ratio of 2.4 dB below and the improved gain of 10.5 dBi above are measured by the added conical wall. The measured E-field radiation patterns and main beam directivity toward +z axis direction are agreed well with the simulated results. The proposed antenna will be applied for the NLJD system.
Keywords :
antenna radiation patterns; spiral antennas; NLJD system; beam directivity; circular cavity; conical wall; high gain spiral antenna; measured E-field radiation patterns; multiband spiral antenna; Antenna measurements; Antennas; Cavity resonators; Gain; Gain measurement; Loss measurement; Spirals; Circular polarization; Conical wall; High gain; Metal cap; NLJD system; Spiral antenna;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2013 Asia-Pacific
Conference_Location :
Seoul
DOI :
10.1109/APMC.2013.6695218
