摘要
In this letter, a compact rat-race coupler is developed using shunt-stub-based artificial transmission lines (SSB ATLs). A conventional quarter-wavelength microstrip can be equivalent to an SSB ATL realized by two series high-impedance microstrips with the high-impedance branch-type shunt stubs. The circuit configuration of the SSB ATL is beneficial to miniaturize the circuit size using the folding technique. By integrating six SSB ATLs, a compact rat-race coupler can be implemented with a 3.9% circuit size of the conventional one. The measured results of the developed rat-race coupler are in a good agreement with the simulated results by full-wave electromagnetic simulator.
| 原文 | English |
|---|---|
| 文章編號 | 4666747 |
| 頁（從 - 到） | 734-736 |
| 頁數 | 3 |
| 期刊 | IEEE Microwave and Wireless Components Letters |
| 卷 | 18 |
| 發行號 | 11 |
| DOIs | |
| 出版狀態 | Published - 11月 2008 |