Printed Digital Audio Broadcast Antennas
In this paper, printed antennas were studied for digital broadcast reception. The first one is a meandered loop antenna. Being in a meandered form, it can be made very compact. However, the gain and efficiency are quite low. In our study, the measured gain is only -30 dBi. Aside from low gain, the bandwidth is also narrow. Therefore, this configuration may not be practical in use. We then studied a bow-tie antenna. Bow-tie antenna is typically considered to have more band-width than the meandered configuration. Its gain increases up to 1.85 dBi. Measured bandwidth is around 8％. For DAB reception in upper half of Band III, a required bandwidth of 13％ is needed. We found that the bandwidth can be increased by half-sizing the bow-tie antenna with-out reducing too much of its gain. This half sized bow-tie antenna (HBTA) takes an area of 475mm by 110 mm. Measured 10 db return loss bandwidth ranges from 192 to 236 MHz, or 21％ bandwidth centered at 214 MHz. The gain is 1.78 dBi within the whole band.
The-Nan Chang Cheng-Min Jen
Graduate Institute of Communication,Tatung University,Taiwan
国际会议
Progress in Electromagnetics Research Symposium 2008(2008年电磁学研究新进展学术研讨会)(PIERS 2008)
杭州
英文
1-4
2008-03-24（万方平台首次上网日期，不代表论文的发表时间）