H-plane 3-dB hybrid ring of high isolation in substrate-integrated rectangular waveguide (SIRW)
✍ Scribed by Wenquan Che; Kuan Deng; Edward K. N. Yung; Ke Wu
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 166 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0895-2477
No coin nor oath required. For personal study only.
✦ Synopsis
It is observed that the radiation patterns at the lower frequencies (3 and 5.3 GHz) are not much different. Conversely, the copolarized components of the x-z plane at the higher frequencies (7.9 and 10 GHz) are relatively distorted due to the generation of the higher order modes and an offset rectangular stub with respect to the y-axis. Figure 5 presents the measured antenna gain versus frequency. The antenna gain varies from about 4 to 7.3 dBi over the impedance bandwidth obtained.
4. CONCLUSION
An ultra-wideband square-slot antenna fed by an offset rectangular microstrip line has been proposed and successfully implemented. The measured impedance bandwidth of the antenna is from 2.78 to 12.02 GHz for VSWR Ͻ 2. This antenna is suitable for application in UWB systems.