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| Content Provider | IET Digital Library |
|---|---|
| Author | Bemani, Mohammad Nikmehr, Saeid Takfallah, Hamid Reza |
| Abstract | Using a composite right- and left-handed transmission lines, a dual-band microstrip-to-coplanar stripline balun is proposed that presents the benefits of bandwidth enlargement, excellent isolation and equal power split between output ports in the two passbands. Also, the dual-band nature of the balun, close space between output ports and ease of integration with a printed antenna in a compact size make it well suited for feeding dual-band planar two-wire antennas. As an example of an application, the proposed balun is designed and fabricated to work at two arbitrary frequency bands, 0.9 and 1.8 GHz. There is a good agreement between the measured and predicted results, which verifies the proposed design methodology. The fabricated balun shows a measured differential output phase bandwidth (180° ± 10°) of 22.95% and 18.76% for the first and second frequency bands, respectively. Moreover, this device is shown to have enhanced bandwidth performance in both isolation and 3-dB magnitude balance. To validate the performance of the proposed balun, the balun is employed to feed a dual-band metamaterial-loaded bow-tie antenna. The experimental results show that the return losses for both the operating bands remain below 10 dB. Likewise, the dual-band bow-tie antenna provides quasi-omnidirectional radiation over the frequency bands. |
| Starting Page | 532 |
| Ending Page | 540 |
| Page Count | 9 |
| ISSN | 17518725 |
| Volume Number | 8 |
| e-ISSN | 17518733 |
| Issue Number | Issue 7, May (2014) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-map/8/7 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-map.2013.0532 |
| Journal | IET Microwaves, Antennas & Propagation |
| Publisher Date | 2014-01-29 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Antenna Accessory Antenna Feeds Antenna Radiation Pattern Baluns Bandwidth Enlargement Bandwidth Performance Enhancement Composite Left-handed Transmission Line Composite Right-handed Transmission Line Coplanar Waveguide Dual-band Bow-tie Antenna Feeding Dual-band Metamaterial Loaded Bow-tie Antenna Feeding Dual-band Microstrip-to-coplanar Stripline Balun Dual-band Microstrip-to-coplanar Stripline Wilkinson Balun Dual-band Planar Two-wire Antenna Feeding Frequency 0.9 GHz Frequency 1.8 GHz Metamaterial Antenna Microstrip Antenna Multifrequency Antenna Printed Antenna Quasi-omnidirectional Radiation Return Loss Size 0.79 Mm Strip Line Component Transmission Line Waveguide And Microwave Transmission Line Waveguide And Microwave Transmission Line Component |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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